Abstract: An air fuel mixer having a mixing duct, a set of inner and outer counter-rotating swirlers at the upstream end of the mixing duct, and means for injecting fuel into the mixing duct is provided, wherein high pressure air from a compressor is injected into the mixing duct through the swirlers to form an intense shear region and fuel is injected into the mixing duct from the fuel nozzle by means of a plurality of fuel spokes so that the high pressure air and the fuel is uniformly mixed therein so as to produce minimal formation of pollutants when the fuel/air mixture is exhausted out the downstream end of said mixing duct into the combustor and ignited.

Abstract: An air fuel mixer having a mixing duct, a set of inner and outer counter-rotating swirlers at the upstream end of the mixing duct, and means for injecting fuel into the mixing duct is provided, wherein high pressure air from a compressor is injected into the mixing duct through the swirlers to form an intense shear region and fuel is injected into the mixing duct from the fuel nozzle by means of a plurality of non-linear fuel spokes so that the high pressure air and the fuel is uniformly mixed therein so as to produce minimal formation of pollutants when the fuel/air mixture is exhausted out the downstream end of said mixing duct into the combustor and ignited.

Abstract: A dual sleeve boiler is arranged to dispose a portion (72, 74, 76) of its fluid conduit between a support member (64) of the boiler and the heat generating portion (20, 24) of the boiler. The end of a conduit through which water is introduced to the boiler is disposed between an enclosing means (24) which forms an axial end of the boiler and a cylindrical tube (64) disposed through the center of the boiler for purposes of supporting the boiler. As relatively cool fluid is introduced into the conduit of the boiler, it passes between the heat generating portions (20) of the boiler and the support tube (64) and provides a thermal barrier to prevent heat from traveling, through conduction, into the supporting means (64) which is attached to an external support member (71). This prevents heat from flowing into the external support member (71) and possibly damaging heat sensitive components attached thereto.

Abstract: In order to provide a control valve for reducing the pressure of a fluid flowing through a system, while also achieving the pressure reduction in an acoustically damped manner, the flow control valve utilizes pressure reduction chambers for reducing fluid pressure in an incremental manner together with a porous insert associated with the pressure reduction chambers for acoustically damping noise generated during the pressure reduction. The flow control valve includes a valve housing having a valve chamber in direct fluid communication with a fluid inlet and having a plurality of spaced openings through which the fluid inlet communicates with the fluid outlet.

Abstract: A noise damping system incorporating in the hull of an underwater torpedo or the like which includes a power plant having a boiler. An inner hull section includes hotwell passages about the boiler whereby subcooled liquid in the hotwell passages absorbs heat from the boiler. A noise damping elastomer layer is provided about the inner hull section whereby the hotwell passages insulate the noise damping layer from the boiler. An outer hull section has condenser passages about the noise damping layer. The hotwell passages and the condenser passages are part of the closed circulation system of the power plant.

Abstract: Noise transmission problems in a torpedo or the like are avoided through the use of a vibration isolating mount 16 to mount various components to the hull 10. The mount 16 includes a generally vertical ring 60 having a vertical, axially facing surface 66 and mounting means 62 for mounting the ring to the hull 10 or the like. Also included is a generally vertical, annular yoke 76 having a vertical, axially facing surface 80 aligned with, spaced from and facing the ring surface 66 and having mounting means 92, 94 for securing the yoke to an object 14, 18 subject to vibration. At least one soft, elastomeric pad 90 extends horizontally between the ring 60 and the yoke 76, the pad 90 being disposed between the surfaces 66 and 80 and bonded thereto. The pad 90 will always be in shear to provide good attenuation and occasionally will be placed in tension or compression when relative movement between the ring 60 and the yoke 76 having an axial component occurs.

Abstract: In order to provide a control valve for reducing the pressure of a fluid flowing through a system, while also achieving the pressure reduction in an acoustically damped manner, the flow control valve utilizes a pressure reduction chamber for reducing fluid pressure in an incremental manner together with a valve member having a porous insert for acoustically damping noise generated during the pressure reduction. The flow control valve includes a valve housing having a valve chamber intermediate a fluid inlet and a fluid outlet through which the fluid inlet communicates with the fluid outlet. By utilizing these components in the valve, the pressure reduction chamber can be disposed generally intermediate the fluid inlet and valve chamber, and the hollow valve member can be disposed in communication with the pressure reduction chamber, whereby the porous insert in the hollow valve member will further reduce fluid pressure in an acoustically damped manner upstream of the fluid outlet.

Abstract: Noise suppression is achieved in a closed Rankine cycle torpedo including a propulsor 36, a turbine 26 connected to the propulsor 36, the turbine 26 having an annular outlet 40. The regenerator 42 is disposed about the turbine outlet 40 and has a radially outwardly opening annular regenerator outlet 46. A hull condenser 10, 48, 52 has an axially opening inlet 54 and a conduit 56 connects the inlet 54 with the regenerator outlet 46 and has a wall 58 configured to cause fluid exiting in a radial direction from the regenerator outlet 46 to flow axially to the inlet 54. At least one curved vane 60, 62 is located within the conduit 56 for converting radial fluid flow to axial fluid flow and a sound suppressing elastomer 64, 74 is associated with each of the wall 58 and the vane 60, 62 for attenuating vibration imparted thereto by fluid impinging on the associated wall 58 or vane 60, 62.

Abstract: Thermal degredation of elastomeric pads (74, 76) in a vibration isolating mount (40) intended for use in a high temperature environment such as posed by a boiler (26) is avoided with a construction including an inner annular element (42) secured to the boiler (26) and having an axial face (52) directed toward the boiler (26), an intermediate annular element having a face (72) facing, but axially spaced from the face (52) and radial projections (64) extending radially outwardly of the periphery of the element (42). An outer element (54) has portions (55) aligned with the projections (64). Elastomeric pads (74) extend between the intermediate and the outer elements while pads (76) extend between the intermediate and inner elements with the intermediate elements shading the pads (74, 76) from radiant energy emanating from the boiler (26).

Abstract: Inefficiencies in charging a closed cycle Rankine apparatus with working fluid and removing non-condensibles from the system are avoided in a Rankine cycle system which includes a source of pressurized fluid 60 and an ejector 64 having a pressure fluid inlet 66, an ejection fluid inlet 68 and an outlet 70, the latter being connected to a reservoir 46 for working fluid. A selectively operable valve 62 interconnects the source 60 and the pressure fluid inlet 66 while the ejection fluid inlet 68 is connected to the remainder of the system. When the valve 62 is operated, the reservoir 46 is pressurized by the pressure fluid as well as non-condensibles in the system entrained therewith withdrawn via the ejection system inlet 68 to charge the system with working fluid.