Abstract: A trapping apparatus traps solid substances converted from reaction products contained in exhaust gases discharged from a process apparatus by a vacuum pump. The trapping apparatus has a trap member for contacting the exhaust gases and trapping reaction products contained in exhaust gases, and a trap housing (1) accommodating the trap member (4) therein. The trap housing has an inlet port (2) for introducing exhaust gases, and an exhaust gas space (3) connected to the inlet port and having an increased cross-sectional area in the direction in which exhaust gases flow in. The trap housing has a flow passage defined therein for passing the exhaust gases in the exhaust gas space and then changing the direction of the exhaust gases so as to flow from the exhaust gas space substantially perpendicularly to the trap member so as to pass the exhaust gases through the trap member while in contact therewith.

Abstract: A dual cutter head, self contained mower (30, 200) is provided for cutting vegetation beneath and on opposite sides of guard rails or cable barriers, and on opposite sides of rows of small trees, hedges, walls or fences. The cutter heads (52, 53 and 252, 253) are staggered to cut overlapping swathes and are adjustably biased to permit the cutter heads to move laterally away from one another when an obstacle is encountered. The outer cutter head (53, 253) can be swung to an overhead position to avoid road signs, poles or the like. The mower can be front or rear mounted and can be reversed to cut at either side of the supporting vehicle. A spray system (323) applies herbicides or other liquids to the area being mowed.

Abstract: A roller for turf mowing equipment utilizes an interlocking connection with a gap between roller sections and a resilient sleeve to protect the connection. The gap between adjacent sections accommodates thermal expansion, thereby preventing binding and roller failure. The resilient sleeve prevents infiltration of contaminants through the gap. In addition, the resilient sleeve fits tightly between the roller sections urging them apart to maintain the gap and a uniform section distribution during use.

Abstract: A crop picking head assembly has a known oscillation generating head supported in a head support frame suspended from a harvester framework by two pairs of depending arms. One pair of arms is variable in length to adjust picking head height and the other pair is fixed in length. The picking head has a variety of crop contacting rod arrays to accommodate various cordon types supporting extended rows of crop foliage, such as grape vines. The harvester may carry one such picking head on one side of the vine row or may carry mirror image heads, one on each side of the vine row.

Abstract: A pulsed combustion device includes a support structure and a combustor carousel supported by the support structure and rotating relative thereto about an axis. The carousel has a number of combustion conduits in a circumferential array. Each conduit cyclically receives a charge and discharges combustion products of the charge.

Abstract: A method of avoiding damage to a decoupling hose mounted between two tubes of a motor vehicle exhaust system, said hose comprising a deformable inner portion, an outer sealing leakproofing portion in the form of a continuous and leaktight sleeve having a flexible central zone and two rigid endpieces, and an intermediate portion in the form of a wad of thermal lagging extending substantially over the entire length of the outer sleeve, each rigid endpiece extending at least over a length such that its peripheral end edge connected to the flexible central zone overlies the inner portion of the hose which is subjected to deformation, wherein, in order to avoid any damage to the wad of thermal lagging by said peripheral end edge of each endpiece, the method consists in defining the effective length of the endpieces in such a manner that for the wad of thermal lagging having an initial thickness H0 and a compressed thickness Hc when compressed by said peripheral edge of each endpiece during maximum transverse defle

Abstract: A method and a device for implementing a method for ascertaining the load condition with an exhaust-gas component of a component arranged in an exhaust-gas region of an internal combustion engine is provided in which an increase in the exhaust-mass flow of the internal combustion engine and a detection of a pressure change in the exhaust-gas region in front of the component is specified. The load condition of the component is determined from the pressure change.

Abstract: An apparatus, a system, and a method for treating exhaust gases from an internal combustion engine. The system and method employing the use of a catalytic device coaxial-arranged dual leg apparatus comprising a housing having a first flow path and a second flow path having coaxially arranged portions, a device for selectively directing the exhaust gases between the first flow path and the second flow path, and a first NOx adsorbing catalyst contained in the first flow path.

Abstract: A forced regeneration device which performs regeneration of a particulate filter includes oxidation catalysts (23, 24a) disposed upstream from the particulate filter or in said particulate filter and a burner (30) located upstream from the oxidation catalysts and operable switching between a combustion mode for combusting a fuel spray by inflammation to raise temperature of exhaust gases in an exhaust passage and a fuel supply mode for supplying only a fuel spray to the exhaust passage without inflammation. After the burner operates in the combustion mode, the burner operation is switched to the fuel supply mode.

Abstract: An emission abatement system comprises a plurality of NOX traps positioned in a parallel flow arrangement, a desulfurization agent supplier for supplying a desulfurization agent, a valve arrangement for directing flow of the desulfurization agent and internal combustion engine exhaust gas between the NOX traps, and a controller. The controller is used to control operation of the desulfurization agent supplier and the valve arrangement to desulfurize the NOX traps. An associated method is disclosed.

Abstract: The invention concerns a method for regenerating a device filtering exhaust gases produced by a diesel engine, said method being of the type wherein particles, retained on a filtering means (22) of the filtering device, are burnt by the action of a combustion catalyst system. Said method consists essentially in retaining the hot exhaust gases around the filtering means (22) so as to feed to the particles, at least part of the heat energy required for their combustion and in burning said particles to regenerate the filtering device. The invention also concerns a device for implementing the method, comprising a means for producing a combustion catalyst (20), a filtering means (22) of exhaust gases and a diesel oil injecting means, the means for producing a combustion catalyst and filtering means being contained in a reaction chamber (18).

Abstract: A plurality of compressed gas thermo-dynamic battery storage units are connectable to power a power generating system. A system for generating power from energy stored in compressed gas includes at least two (2) thermo-dynamic battery storage units connectable in series to one another for controllable release of the gas to drive a generator. A method in accordance with the invention comprises providing at least two (2) thermo dynamic battery storage units connectable in series with one another for controllable release of the gas to drive a generator.

Abstract: A rotary Stirling-type engine (100) having a heat chamber (105) with a compressing turbine (107) at one end and a valve assembly (108) through which gas enters the heat chamber (105). At the order end is a nozzle housing (109) for gas exit. A shaft (110) extends from the turbine (107) and is mounted in a bearing (111). Another shaft (112) extends from the nozzle housing (109), mounted in bearing (113). A rotor flywheel (114) is also mounted on shaft (110) and fixed in place by socket pin (115). The engine also contains insulating jacket (120), regenerating a housing (122) and a heat sink (126). In the engine, gas is compressed by the turbine (107) until it opens valve (108). The passes through and expands in the heat chamber where it receives heat radiation (eg. Solar) through a glass window (121). The gas cannot escape back through the valve (108) but rather through two circumferentially mounted nozzle adjusters, spinning the whole central assembly, including the compressing turbine (107), as it escapes.

Abstract: A casing (1) with a circular cylindrical internal surface (3) delimits an operating chamber. A rotor (4) orbits about a chamber axis which is the axis of the internal surface (3). The rotor (4) has a circular cylindrical external surface (11), a generatrix of which is adjacent to the internal surface (3), a diametrically opposite genetrix being spaced from the internal surface (3). A vane member (17), mounted on the casing (1) and pivotable about a pivot axis parallel to the chamber axis, is accommodated in a fluid inlet/outlet aperture (18) in the casing, the vane member having a passageway (17a) communicating between the exterior of the casing and the operating chamber.

Abstract: An internal combustion engine has a turbocharger system that includes an exhaust gas turbocharger and an auxiliary compressor and is connected to an engine control system via which it is controlled as a function of engine operating parameters. This provides a relatively low-cost method for precisely controlling or regulating the secondary air by integrating the auxiliary compressor into a secondary air provision system that is operable by the control system within a load and/or rotational speed range below the boost range during a warm-up phase.

Abstract: A method and a device for regulating the boost pressure of an internal combustion engine having a multiflow air system, which enables both rapid regulation and limitation of the exhaust gas back pressures. The multiflow air system includes a multichannel air supply and a corresponding multichannel exhaust gas discharge, each exhaust gas channel having an exhaust gas turbocharger. A manipulated variable for a specified boost pressure to be set is determined as a function of the actual exhaust gas back pressure prevailing in the particular exhaust gas channel, a total specified exhaust gas back pressure being determined by a first controller from the difference between the specified boost pressure and an actual boost pressure, and a specified exhaust gas back pressure being determined for the individual exhaust gas channels from the total specified exhaust gas back pressure as a function of a difference between the air mass flows supplied via the air channels of the internal combustion engine.

Abstract: A method for operating an internal combustion engine using an electrically operated air compressor that allows for heating up an exhaust-gas treatment device more rapidly. The electrically operated air compressor is activated during a starting process of the internal combustion engine.

Abstract: The rocket motor nozzle assembly of this invention includes a throat insert and a carbon or silica protective eyelid. The throat insert has a carbon throat support and a refractory metal shell. The shell is positioned radially inside the throat support to cover the inner surface of the throat support. The protective eyelid covers a sufficient portion of the forward surface region of the shell and the underlying converging portion of the throat support to protect these components against particle impingement. The protective eyelid extends sufficiently far forward along the converging/diverging pathway to cover and protect the forward face or edge of the throat insert and prevent the combustion gases from passing under the throat insert and reaching the radially outer surface of the throat insert. However, the protective eyelid leaves the throat surface region of the shell exposed to the converging/diverging pathway.

Abstract: The invention relates to a method for operation of a burner, whereby a mixture used for burning is supplied to the burner in a two-stage process. In a first step atomised water is mixed with combustion air and said mixture is mixed with a fuel in a second step and then supplied to the burner. Said burner comprises means for carrying out the above method.

Abstract: A process having three steps utilized individually or in combination to reduce nitrogen oxides, NOx, emissions from gas turbines. One or more injectors disperse very fine fuel droplets to achieve rapid and complete combustion in zone one immediately downstream of the fuel injectors. The second step uses one or more injectors inserted into the combustor to disperse water droplets throughout zone two, immediately downstream of zone one, to lower the gas temperature and suppress formation of thermal NOx,. The third step uses one or more injectors to disperse aqueous droplets containing a dissolved NOx reducing agent throughout zone three, immediately downstream of zone two, and whose gas temperature favors the reduction of NOx. Alternatively, the dissolved NOx reducing agent can be mixed with a liquid fuel to convert zone three into slightly fuel rich conditions, enabling nitrogen oxide reduction at higher gas temperatures.

Abstract: A pulsejet system and method requires no pulsejet internal moving parts. Each pulsejet includes a combustion chamber having an upstream inlet port joined to an inlet diffuser, boundary layer air ports enveloping the combustion chamber, and a downstream exit port joined to a discharge nozzle. Each pulsejet discharges into an ejector to increase net thrust. Each ejector includes an augmentor cell having side walls and perforated end plates. The perforated end plate between each pair of pulsejets is shared to permit the discharge thrust to equalize across the pulsejet group. Air and fuel mix in the combustion chamber and are detonated by a reflected back-pressure wave. Detonation/deflagration reverse pressure waves compressing boundary layer air flow act as a pneumatic throat to temporarily choke off inlet fresh air at the upstream inlet port. The pneumatic throat replaces the conventional mechanical valve used for this purpose.

Abstract: A gas turbine combustor has a combustion chamber into which fuel and air are supplied, wherein the fuel and the air are supplied into said combustion chamber as a plurality of coaxial jets.

Abstract: A method enables a gas turbine engine to be operated. The method includes directing fluid flow from a source into an inlet of a valve, channeling the fluid flow entering an inlet portion of the valve towards an outlet portion of the valve such that a direction of the fluid flow is changed within the inlet portion, and controlling the amount of fluid flow entering the outlet portion of the valve by selectively positioning a valve disk coupled within the inlet portion of the valve by a valve disk axle. The method also comprises channeling the fluid flow from the inlet portion of the valve through the outlet portion of the valve and into a fluid supply pipe, wherein the valve outlet portion has a substantially right cylindrical shape such that a direction of fluid entering the body outlet portion remains substantially constant therethrough.

Abstract: A gas turbine arrangement (1) including a gas turbine (2), a generator (3) and a gearbox (4). The gearbox (4) is connected to an output shaft (5) from the gas turbine and an input shaft (6) to the generator. The gas turbine arrangement (1) also has a starter motor (7) that is connected to an output shaft (8) from the generator (3).

Abstract: A wear cover for use on a gas turbine transition duct support bracket is disclosed. The wear cover, which is manufactured from a single piece of sheet metal, does not require complex manufacturing processes or tools, thereby reducing component cost. The wear cover comprises first and second leg portions substantially parallel to each other and each generally perpendicular to a third leg portion. Each of the leg portions serve to protect a surface of a support bracket finger from excessive wear associated with frictional contact with mounting blocks of a transition duct. The wear cover is designed to slip onto a support bracket finger through a first opening and is fixed to the finger by a means such as welding.

Abstract: A method facilitates assembling a gas turbine engine. The method comprises coupling a combustor including a dome assembly and a combustor liner that extends downstream from the dome assembly to a combustor casing that is positioned radially outwardly from the combustor, coupling a fuel injector including a fuel inlet and an air inlet to the combustor casing such that the fuel injector extends axially through the dome assembly such that fuel may be discharged from the primer nozzle into the combustor, and coupling the air inlet to an air source such that cooling air received therethrough is circulated through the fuel injector to facilitate cooling the fuel injector.

Abstract: A method facilitates assembling a gas turbine engine. The method comprises coupling a combustor including a dome assembly and a combustor liner that extends downstream from the dome assembly to a combustor casing that is positioned radially outwardly from the combustor, coupling a ring support that includes a first radial flange, a second radial flange, and a plurality of beams that extend therebetween to the combustor casing, and coupling a primer nozzle including an injection tip to the combustor such that the primer nozzle extends axially through the dome assembly such that fuel may be discharged from the primer nozzle into the combustor during engine start-up operating conditions.

Abstract: The invention relates to an annular combustion chamber for a turbomachine of axis X, in which the chamber end wall is fixed to inner and outer side walls by means of a plurality of radially-inner attachment fittings and by means of a plurality of radially-outer attachment fittings disposed upstream from said chamber end wall by bolting a zone of each of said fittings to said side walls. At least one of said pluralities of attachment fittings is integrated in a ring secured to the chamber end wall and comprises a plurality of pairs of tabs which extend upstream beyond the bolting zones, the two tabs in each pair being disposed circumferentially on either side of a bolting zone and being interconnected at their upstream end to the upstream end of a fixing plate which extends between said two tabs and which presents a bolting zone for being fixed to the adjacent side wall.

Abstract: In a gas turbine (1) with an annular combustion chamber (4), the combustion area (24) of which is bounded by an annular combustion chamber outer wall (26) on the one hand and by an annular combustion chamber inner wall (28) located therein on the other hand, it should be possible to dismantle the combustion chamber inner wall (28) comparatively quickly and easily. For this purpose according to the invention the combustion chamber inner wall (28) is formed by a plurality of wall elements attached to a support structure, wherein the support structure is formed by a plurality of sub-components abutting each other at a horizontal parting joint and the abutting sub-components (30) of the combustion chamber inner wall (28) are connected to each other at their horizontal parting joint by means of a plurality of screw connections (32) oriented at an angle to the inner wall surface.

Abstract: The magnetic material for magnetic refrigeration of the present invention is characterized by exhibiting, in a certain temperature region, preferably, only in part of a temperature region from 200 K to 350 K, an inflection point at which a second order differential coefficient of a magnetization curve changes from positive to negative with respect to a magnetic field, within the range of this magnetic field formed using a permanent magnet unit. This magnetic material of the present invention can generate a low temperature by using a relatively low magnetic field, by transferring the entropy between the electron spin system and the lattice system near the temperature at which an inflection point appears on the magnetization curve. Examples of the magnetic material meeting this condition are La(Fe,Si)13, (Hf,Ta)Fe2, (Ti,Sc)Fe2, and (Nb,Mo)Fe2, each containing 50 to 60 atomic % of transition metals such as Fe.

Abstract: Disclosed is a wearable cooler including a thermoelectric module provided on clothes for absorbing and discharging heat according to an electric current, at least one first heat sink provided at a first side of the thermoelectric module, at least one second heat sink provided at an opposite side of the first heat sink on the basis of the thermoelectric module, at least one first fan provided at an opposite side of the thermoelectric module on the basis of the first heat sink for blowing air to the first heat sink, and an external case surrounding outsides of the first heat sink and the first fan, and having at least one air inlet and at least one air outlet.

Abstract: The present invention applies to single or two stage pulse tube refrigerators that have one or more passive orifices at the hot end(s) of the pulse tube(s) through which gas flows to achieve phase shifting and the phase shifting gas flow circulates to a remote heat sink by adding check valves and an appropriate piping circuit.

Abstract: A MEMS based thermoacoustic cryo-cooler for thermal management of cryogenic electronic devices. The cryogenic cooling system can be integrated directly into a cryogenic electronic device. A vertical comb-drive provides an acoustic source through a driving plate to a resonant tube. By exciting a standing wave within the resonant tube, a temperature difference develops across a stack in the tube, thereby enabling heat exchange between heat exchangers. A tapered resonant tube improves the efficiency of the cooling system, compared with a simple cylinder configuration, leading to reduced harmonics and strong standing waves.

Abstract: A hydrogen storage apparatus that includes multiple gas storage tanks that each house a storing/adsorbing material and through the interior of which a fluid travels is provided. The gas storage apparatus 10 includes roughly cylindrical gas storage tanks 20 that house hydrogen-storing alloy. The multiple gas storage tanks 20 are disposed longitudinally parallel to each other in an ordered fashion such that roughly triangular prism-shaped empty spaces are formed between multiple adjacent hydrogen storage tanks 20. Coolant paths through which coolant flows are formed in these roughly triangular prism-shaped empty spaces. These coolant paths are thermally connected to the hydrogen-storing alloy in the gas storage tanks 20 via constituent members of the gas storage tanks 20 and via heat transfer plates 28 disposed on the gas storage tanks 20.

Abstract: A data acquisition system and method includes monitoring a cooling system having a refrigerant compressor, evaporator, and condenser, and employs a number of sensors to monitor various operating parameters of the system. A database stores predefined operating parameters for a plurality of cooling systems. The operating parameters are provided to a computer, which compares the provided operating parameters of the monitored cooling system with the predefined operating parameters to provide diagnostic results for the monitored cooling system.

Abstract: A controlled method for an energy-saving and energy-releasing air conditioning discloses the energy-saving and energy-releasing actions performed by the two adjoined heat exchangers of the storage means. The feature of this design is to meet refrigerating and heat-produced requirements by using the controlled method of the present invention. Automatically adjusting the refrigerant flow rates of the first and the second circular refrigerant loops can place it into the optimum operational condition while central air conditioner is either under high loading or under low loading condition.

Abstract: The invention relates to a refrigerating device 1 for storing and presenting ice cream, with a heat-insulating housing 2, where housing 2 displays a housing opening 3 and a storage device 4 with a receiving compartment 5 for ice cream, where housing 2 essentially surrounds receiving compartment 5 completely and storage device 4 is mounted in housing 2 in rotating fashion, and where a heat exchanger 6 for generating cold air is assigned to housing 2 and can be connected to a refrigerating unit 7 located inside or outside housing 2, such that the ice cream in receiving compartment 5 can be refrigerated by the cold air generated. The invention is characterized in that storage device 4 is designed as an insert 9 that can be fitted and/or removed through housing opening 3. Insert 9 according to the invention is particularly characterized in that ice cream receiving compartment 5 is filled with unwrapped ice cream, at least in the area of adjacent delimiting walls 21.

Abstract: An evaporator for refrigeration systems, comprising a set of tubes (20) arranged in series, spaced and parallel in relation to each other, carrying a refrigerant fluid and which are incorporated to and trespass a plurality of fins (10) arranged in multiple rows extending transversally to the direction of a forced airflow (F). The fins (10), which are incorporated to the first and second tubes (20) are spaced from each other by a larger distance (d), when they are operatively associated with a refrigerating environment, and by a smaller distance (d), when they are operatively associated with a freezing environment. Said distances (d) decrease at each two subsequent tubes (20), until reaching at least the third tube (20), said distance being then maintained at a minimum value for the other subsequent tubes (20).

Abstract: The present invention includes foundation legs of an outdoor unit that are made of a relatively thin plate material, and can reduce costs. This outdoor unit includes a compressor, an outdoor refrigerant circuit that includes pipes and a heat exchanger, a case that houses the refrigerant circuit, and a plurality of supports provided so that they protrude downward from the bottom part of the case. Furthermore, foundation legs are provided at the lower ends of the plurality of supports for fixing such, so that they extend towards the inner side of the case.

Abstract: A media cabinet for supporting a media pad in an evaporative cooler. The media cabinet being pivotally coupled to the evaporative cooler housing to permit the media pad to be removed either vertically or at an angle to the evaporative cooler housing.

Abstract: A low profile evaporative cooler housing for attachment to a building includes a front panel, and an opposing rear panel that may have an extension that extends into a wall of the building. A first and second louver may extend between the front and rear panels.

Abstract: A low profile side inlet evaporative cooler including a housing having a housing length width at least twice the housing width. A centrifugal blower draws air through two side inlets through and through a rigid evaporative cooling media.

Abstract: An air-conditioning system of a substrate processing apparatus includes an air inlet line for providing air to a clean room. A contamination control apparatus for removing contaminants in the air is connected to the air inlet line. A controller controls temperature and humidity of the air without the contaminants. An air outlet line provides the air having the controlled temperature and humidity to a substrate processing chamber that is disposed in the clean room. The contamination control apparatus includes a spray unit having at least one nozzle that sprays water. At least one eliminator that traps the water for capturing contaminants in the air and drops the trapped water into a tank. A water circulation unit provides the water that includes an additive for controlling pH of the water to the spray unit.

Abstract: Gases are vented from a waste site such as a landfill, and the gases are separated into at least three streams comprising a hydrocarbon stream, a carbon dioxide stream, and residue stream. At least a portion of the carbon dioxide stream and hydrocarbon stream are liquefied or converted to a supercritical liquid. At least some of the carbon dioxide gas stream (as a liquid or supercritical fluid) is used in a cleaning step, preferably a polymer cleaning step, and more preferably a polymer cleaning step in a polymer recycling process, and most preferably in a polymer cleaning step in a polymer recycling system where the cleaning is performed on-site at the waste site.

Abstract: The invention relates to a method of separating a dry feed gas (1) containing mostly methane, ethane and propane into a first product (17), called the treated gas, which is relatively more volatile, and a second product (34), called fraction C2 plus, which is relatively less volatile. The inventive method comprises: (i) an operation involving the cooling of the supply gas (1) into a cooled gas (2); (ii) an operation whereby the cooled gas (2) from operation (i) is separated and treated; and (iii) distillation in a distillation device (C3). The invention also relates to the corresponding installation. According to the invention, the distillation device (C3) comprises at least first and second distillation columns, (C1) and (C2), which operate at different pressures.

Abstract: Cut gemstones, and methods for producing such gemstones, providing a spiraling effect on the crown. The gemstone cutting method includes cutting crown facets such that they radiate in a spiral fashion from a central facet. The spiraling effect can be achieved by cutting the (non-table) crown facets such that they are nested between the previous (closer to the table) facets. The crown facets may be square or parallelograms. By disposing each subsequent crown facet between two previous facets, the facets appear as if they are spiraling from the central facet. The result is enhanced scintillation and brilliance.

Abstract: An bent glass sheet producing apparatus (20) has a heating furnace (21) in a heating zone (Z1), a preliminary forming mechanism (25) in a preliminary forming zone (Z2) downstream of the heating zone (Z1), a two-directional bending mechanism (30) and a conveyor roller mechanism (40) in a forming zone (Z3) downstream of the preliminary forming zone (Z2), and a cooling mechanism (50) in a cooling zone (Z4) downstream of the forming zone (Z3). For a purpose of conveying a two-directionally bent glass sheet formed by the two-directional bending mechanism, the conveyor roller mechanism (40) includes a plurality of conveyor rollers (41) having an arcuate shape of a radius (R2) in a direction perpendicular to the conveyance direction of the glass sheet, the conveyor rollers (41) being arranged on an arcuate line having a radius in the conveyance direction.

Abstract: The invention relates to a method for the production of borosilicate glass with a surface which can be easily modified, having reactive SiOH-groups. According to said method, a glass melt is produced wherein water is dissolved in quantities of at least 30 mMol of water per litre. Said glass is especially suitable for use as a substrate for sensors and biochips, dirt-proof working glass for windows, reagent glass, laboratory glass, microarrays, electronic noses, artificial nose chips, electronic tongues, chips for the polymerase-chain reaction, DNA-microarray chips, gene chips, protein chips, in addition to biochemical laboratories on a chip.

Abstract: The present invention provides a glass packing tube for use in fabricating a microchannel plate. The glass tube has a plurality of flat inner surfaces and is used to form a boule including a plurality of optical fibers located in the tube and a plurality of support rods between the first optical fibers and the flat surfaces whereby the tube, fibers and rods are fused together with reduced glass flow.

Abstract: In a known method for producing a quartz glass tube by means of flame hydrolysis of a silicon-containing start component, SiO2-containing particles are produced, said particles are deposited on a carrier, forming a soot tube having a porous soot wall with a predetermined radial soot density profile, and the soot tube is treated in a chlorine-containing atmosphere and is then vitrified.