摘要:
The present invention relates to a gas turbine having a housing (1), an outer sealing ring (2) that can be fastened detachably to the housing, a clamping member (3) for clamping the outer sealing ring and the housing together radially, and a rotation locking member that has at least one housing groove (10) and a radial flange (20) of the outer sealing ring that can be locked against rotation in the housing groove in form-fitting manner with play (sa) in the axial and/or peripheral direction.
摘要:
A propulsion thrust control system and method for controlling thrust in a rocket motor includes configuring valves of an energized rocket motor to an initial total valve area according to a total thrust command. The total thrust command is converted into a commanded propellant mass flow discharge rate. A varying total valve area is computed from an error between the commanded propellant mass flow discharge rate and a calculated propellant mass flow discharge rate. The valves are reconfigured according to a distribution of the varying total valve area. The propulsion system includes a pressure vessel with valves and a controller for regulating the valve area according to a propellant mass flow discharge rate from the pressure vessel.
摘要:
A method for determining the free-field thrust of a gas turbine engine using an enclosed gas turbine engine test facility without recourse to an outdoor gas turbine engine test facility. The method includes calculating the gas turbine engine intake momentum drag and cradle drag generated and compensating for these losses. In a further embodiment, the base drag is calculated and also compensated for.
摘要:
In a method for operating a premix burner a water quantity is introduced into at least one of the burner and the reaction zone of the burner depending on at least one command variable formed from at least one measured value. The method can also be used if a burner is operated dry, i.e., without water injection for nitrogen oxide injection, and the injected water quantity is less than 20% of the fuel quantity. The method can be used advantageously especially if a characteristic value derived from combustion pulsations or material temperatures is used as a command variable. The method enables measured parameters to be kept below a permissible upper limit.
摘要:
In a method for regulating the power of a turbo set (10) converting thermal power into electric power, said turbo set (10) comprising, on a common shaft (17), a turbine (11) driven by the thermal power and a generator (16) driven by the turbine (11) and delivering electric power (PG) to a network (18), the electric power (PG) delivered by the generator (16) is determined and the thermal power (PT) for the turbine (11) is regulated as a function of the measured electric power (PG). Destabilization of the network and overloading of the turbo set (10) are avoided by additionally determining the kinetic power (Pkin) consumed or delivered by the shaft (17) and by regulating the thermal power (PT) in accordance with the sum of the electric power (PG) and kinetic power (Pkin).
摘要:
The present invention provides an improved hot gas control valve (20) which is adapted to apportion a gas flow, such as that issuing from a solid propellent gas generator, among a plurality of outlets communicating with rocket thruster nozzles (36). The improved valve has a body (21) and a valve member (22). The body has an inlet (24) communicating with an internal cavity. The cavity is partially bounded by a partially-spherical concave surface (32). The body has a plurality of outlet passages terminating in ports at the concave body surface. The valve member is operatively arranged within the cavity for omni-directional pivotal movement therewithin. The valve member has a surface (40) sealingly engaging the body concave surface and terminating in an edge (41). This valve member edge cooperates with the body ports to form variable-area metering orifices (A, B, C and D) therebetween. These orifices are so configured and arranged as to vary the areas of the orifices as a function of the angular position of the valve member relative to the body such that sum of the individual open areas of the metering orifices is substantially independent of valve member position over an operating range of valve member movement relative to the body.
摘要:
A fuel control system (10) for a power unit used for generating power used for operating an airframe in accordance with the invention includes an air supply (18) for supplying pressurized air blown down from a storage vessel (14) to a combustor (16) which generates a gas stream by burning fuel supplied by a fuel supply (32) driving a turbine (50) to produce the power; a pressure sensor (26) coupled to the air supply for producing an analog signal proportional to pressure upstream in the air supply from the combustor; a digital to analog converter (54) having an offset input coupled to a signal proportional to the sensed pressure, a digital input for receiving a digital input signal, and an analog output which varies in proportion to the sum of the signal applied to the offset input and the digital input signal; a fuel control valve (38) contained with the fuel supply which is controlled as a function of the analog output signal of the digital to analog converter; an analog to digital converter (56) having at least one input and at least one output with the analog to digital converter outputting a digital signal proportional to each input signal applied to the at least one input of the analog to digital converter; and a system controller (24), responsive to the at least one output of the analog to digital converter, controlling the fuel with a periodically generated digital input signal applied to the digital to analog converter.
摘要:
Given limitations on potential locations, weight sizes and amount of weights all possible applied unbalance magnitudes and angles are calculated after determining the initial unbalance magnitude and angle of the rotor this result is vector summed with all possible applied unbalances. The lowest resultant magnitude is determined, independent of the angle. The corresponding weight combination produces the lowest possible residual unbalance within the constraints.
摘要:
A steam turbine inlet valve control system includes separately tunable valve characteristics for single valve and sequential valve operation modes. The sequential valve characteristics include both normal and alternate sequences which can be selected during operation of the steam turbine. The characteristics may be displayed to an operator and modified by graphical manipulation to simplify tuning the control system's characteristics to the steam turbine's operation. The control system also performs direct tracking of flow through the valves by converting sensed position signals to individual valve flow signals using a lift-to-flow conversion characteristic. Individual valve flow signals are summed and corrected for choked flow conditions to produce a tracked flow demand signal.
摘要:
A rocket thrust vector control system including jet tabs and aerodynamic control surfaces is disclosed. The control system removes roll information present in commands to the aerodynamic surfaces and provides only pitch and yaw information to the jet tabs for the thrust vector control. The roll information is removed by a geared summing mechanism. The resulting pitch and yaw output is used to drive the thrust vector control jet tabs. The same powered actuators are used for both the aerodynamic control surfaces and the jet tabs.