Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 12 of 12 for “"Gas Generator"”.
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Surge dynamics of a helicopter engine gas generator
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 1998.
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Combustion gas generator for gas turbine exhaust systems modeling.
A combustion gas generator was constructed for the purpose of modeling shipboard gas turbine engine exhaust systems. In particular, the system was designed and validated for exhaust stack Mach numbers in the neighborhood of 0.07 and exhaust stack temperatures varying from 700 to 900°F with an …
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Visualization and velocity measurement of unsteady flow in a gas generator using cold-flow technique
… cold flow techniques is discussed. The flow in a gas generator has been modeled using cold air. Experimental set up was designed and fabricated to simulate the unsteady flow with different configurations of inlet tubes. Tests were run for flow visualization and measurement of axial velocity at …
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Assessment of the Thermal Advantages of Biased Supersonic Cooling
… film cooling method for hydrogen-fueled, gas-generator cycle rocket engines. The research is intended to serve as an initial proof-of-concept for a biased supersonic film cooling method envisioned for nozzle extension thermal management. The proposed method utilizes a dual-stream injection …
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An Experimental Investigation into NOx Control of a Gas Turbine Combustor and Augmentor Tube Incorporating a Catalytic Reduction System
… engine test cell environment. A modified T-63 gas turbine combustor and an augmentor tube, 21 feet in length and containing a perlite catalyst, were used as a gas generator and catalytic reduction system. Four data runs were made. Three runs were completed without the catalyst installed. …
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Modeling and Optimization of Turbine-Based Combined-Cycle Engine Performance
… impulse performance. The hydrocarbon-fueled gas-generator air turborocket and hydrogen-fueled expander-cycle air turborocket are also competitive because they may provide greater thrust-to-weight than the TBE, but require some engineering problems to be addressed before being fully developed.
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Numerical Modeling of a Ducted Rocket Combustor With Experimental Validation
… confidence. In the ducted rocket a solid fuel gas generator is used to deliver a fuel-rich multi-phase mixture to the combustion chamber. When a valve is used to vary the fuel generator pressure, and thereby the delivered fuel flowrate, the engine is known as a Variable Flow Ducted Rocket …
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Experimental investigation of the flow field in a missile launch tube
… potential hot spots. The mixing of the fuel-rich gas generator effulent and the air in the launch tube was assessed by thermocouple measurements; warm water was used to simulate the exhaust while ambient water represented the air initially contained in the launch tube. The results have shown that …
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Design of a High Specific Power Electric Machine for Turboelectric Propulsion
… propulsion for aviation, in which a gas generator core electrically drives motor-powered propulsors, are limited by the mass and losses of the electric components introduced into the drivetrain. These propulsion systems are predicted to result in a 15\% fuel savings provided that …
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Failure detection, isolation and mitigation for a spacecraft solid fuel reaction control system
… which commonly functions by burning a solid fuel gas generator and expelling gas out of valves arranged around the vehicle. Valve failures are known to occur in spacecraft reaction control systems, and without on-board, real time failure identification and mitigation, the Mars Ascent Vehicle could …
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Investigation of thermally induced stresses in a transition-piece in relation to an aero-derivative gas turbine engine operation
The transition-piece of an aero-derivative gas turbine engine transfers high temperature combusted gases from the gas generator to a power turbine, and it is manufactured from Iron-Base Superalloy A286 in this investigation. Due to the thermal stress levels developed in the casing of the …
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Optimisation of Co-Firing of High Moisture Biomass with Coal in a Bubbling Fluidised Bed Combustor
… of enhancing the of coal fired fluidised bed hot gas generator (HGG) at the Cantley factory of British Sugar. It covers combustion of coal and biomass and their blends also called co-firing in a fluidised bed combustor. Particularly it focuses on the effect of introduction of moisture as part of …