Abstract: A two piece measurement rake has a first split tubular section with at least one hollow support member disposed therethrough the measurement rake includes at least one sensor probe mounted on the hollow support member and coupled to a transducer. A second split tubular section is attached to the first split tubular section, and forms an interior cavity on which the at least one transducer tube is disposed.

Abstract: The present application provides a continuous purge system for use with a stream turbine. The continuous purge system may include a one or more pressure sensors positioned about the steam turbine, one or more pressure lines in communication with the one or more pressure sensors, and a critical flow nozzle system. The critical flow nozzle system may include one or more critical flow nozzles in communication with the one or more pressure lines.

Abstract: A method for controlling electronics across an RF barrier is disclosed. The method comprises a serial data control method that requires a limited number of signals passing through an RF barrier and does not require a free running clock. This method uses a processor with an associated serial data control bus that is located external to the RF chamber. An address dependent form of the serial bus passes through an interface to the RF cavity. The processor uses the serial bus to control electronics inside the RF cavity. The control method uses a minimum number of signals passing through the interface to the RF cavity, thereby preserving the RF isolation of the RF cavity from the external environment.

Abstract: A system, designed to interact electronically with an RF device, is able to test many types of RF devices and is operable to apply a variety of test inputs to an RF device. The RF device, located within a nest inside an RF enclosure, interacts with the system via a nest electronics component. The nest electronics component, located within the RF enclosure and coupled to a nest interface component and a fixture interface component, supplies power and input test signals to the RF device. The nest electronics component may be configured to interact with a particular RF device, which allows the RF enclosure to used with different types of RF devices. The arrangement of these components allows control and measurement of the RF device to be located as close to it as possible and also allows functionality not required within the RF enclosure to be externally located.

Abstract: A method of determining wetness fraction of steam vapor-water mixture in a flow path of a steam turbine includes: a) locating a plurality of acoustic pressure sensors at axially spaced locations along the flow path; b) measuring acoustic pressures from noise in the flow path; c) calculating the speed of sound of the vapor-water mixture; and d) calculating the mass fraction of water in the mixture from the speed of sound of the mixture.

Abstract: A system, designed to interact electronically with an RF device, is able to test many types of RF devices and is operable to apply a variety of test inputs to an RF device. The RF device, located within a nest inside an RF enclosure, interacts with the system via a nest electronics component. The nest electronics component, located within the RF enclosure and coupled to a nest interface component and a fixture interface component, supplies power and input test signals to the RF device. The nest electronics component may be configured to interact with a particular RF device, which allows the RF enclosure to used with different types of RF devices. The arrangement of these components allows control and measurement of the RF device to be located as close to it as possible and also allows functionality not required within the RF enclosure to be externally located.

Abstract: A method for controlling electronics across an RF barrier is disclosed. The method comprises a serial data control method that requires a limited number of signals passing through an RF barrier and does not require a free running clock. This method uses a processor with an associated serial data control bus that is located external to the RF chamber. An address dependent form of the serial bus passes through an interface to the RF cavity. The processor uses the serial bus to control electronics inside the RF cavity. The control method uses a minimum number of signals passing through the interface to the RF cavity, thereby preserving the RF isolation of the RF cavity from the external environment.

Abstract: An apparatus for premixing fuel and air prior to combustion in a gas turbine engine, including: a linear mixing duct having a circular cross-section defined by a wall; a centerbody located along a central axis of the mixing duct and extending substantially the full length of the mixing duct, the centerbody having a plurality of orifices therein to inject fuel into the mixing duct with an axial velocity component; a fuel supply in flow communication with the centerbody orifices; an outer annular swirler located adjacent an upstream end of the mixing duct and including a plurality of circumferentially spaced vanes oriented so as to swirl air flowing therethrough in a first direction; an inner annular swirler located adjacent the mixing duct upstream end and including a plurality of circumferentially spaced vanes, the vanes having an outer radial portion having a leading edge and a trailing edge oriented so as to swirl air flowing therethrough in a second direction opposite the first swirl direction by the outer

Abstract: Combustion-induced unsteady oscillations referred to as screech are suppressed in gas turbine combustors by a plurality (preferably two to six) of screech suppression members disposed in the premixers of the combustors. The screech suppression members are attached to the centerbody of the premixer and extend radially outward, nearly into contact with the inner surface of the premixer tube. The screech suppression members are uniformly spaced about the centerbody and are axially positioned at or near the end of the centerbody which is closest to the main combustion chamber. Alternatively, each screech suppression member can be attached to the inner surface of the premixer tube and extend radially inward nearly into contact with the centerbody. Possible shapes of the screech suppression members include a thick block, a thin rectangular plate, a triangular plate, a V-shaped member, and a cylindrical bar.

Abstract: A supersonic combustion ramjet having a supersonic combustor. The supersonic combustor has a backward-facing step formed in a wall thereof and a forward-facing ramp formed in the wall downstream from the step. Hydrogen fuel is injected into the air flow by axially-directed fuel injectors disposed in the step and/or normally-directed fuel injectors disposed in the ramp. The ramp is inclined toward the center of the combustor so that fuel from the fuel injectors is turned into the main flow. The ensures rapid mixing which enables combustion to be completed within a distance on the order of one foot.

Abstract: An apparatus for containing a spill and regulating the flow of a liquid into a drainage inlet comprise a flange for engaging the opening of the drainage inlet and a sidewall extending from the flange, the sidewall defining a pair of drainage openings therein adjacent the flange and a movable member is positionable in the drainage openings for preventing the flow of the liquid into the drainage inlet through the drainage openings, the movable member can be opened progressively from adjacent the flange to allow a heavier density fluid, such as water, to flow into the drainage opening while maintaining a lighter density fluid, such as oil, floating on the surface of the mixture that collects around the apparatus and thereby prevents entry of the oil into the drainage inlet.

Abstract: An electronic distance meter is interfacable to a controller and measures distance to a moving target by comparing the phase of a signal propagated to the target with the phase of the reflected signal. A time mark indicating when the measurement was made is corrected by an offset to compensate for an apparent distance error related to the doppler effect. The corrected time mark indicates when the target was actually at the apparent distance. An asynchronously resettable timer provides measurement-to-measurement elapsed time information so that position-in-time and velocity data may be obtained. A multi-valued annunciator indicates the integrity of the target signal path.