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Showing 1 to 12 of 12 for “"Multistage compressor"”.
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Modelling high speed multistage compressor stability
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 1991.
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Nonlinear instability behavior of a high speed multistage compressor
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 1997.
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An Experimental Characterization of Tip Leakage Flows and Corresponding Effects on Multistage Compressor Performance
… have shown increased tip clearance in axial flow compressors typically has a detrimental effect on overall pressure rise capability, isentropic efficiency, and stall margin. With modern engine designs trending toward decreased core sizes to increase propulsive efficiency (by increasing bypass …
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Characterization of wake- and tip-vortex-induced unsteady blade response in multistage compressor environment
Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 2002.
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An experimental study of exit flow patterns in a multistage compressor in rotating stall
… of a high-speed, 10- stage, axial-flow compressor operating in rotating stall are analyzed. Procedures used to digitize analog voltages and calibrate pressure transducers are presented. From total and static pressures measured at the exit of the test compressor, stall cell Mach number …
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An experimental study on the effects of blade row interactions on aerodynamic loss mechanisms in a multistage compressor
… much of the complex aerodynamics which governs compressor performance is still not well understood. The unsteady flow field consists of periodic blade row interactions from the wakes and potential fields of each blade and vane. Vane clocking is the relative circumferential indexing of adjacent …
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A computational model for rotating stall and inlet distortions in multistage compressors
… with instability and inlet distortion in multistage compressors. Specifically, the model is aimed at simulating the non-linear aspects of short wavelength stall inception, part span stall cells, and compressor response to three-dimensional inlet distortions. The computed results …
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Novel turbomachinery concepts for highly integrated airframe/propulsion systems
… Mach number (4+) aircraft. The idea of compressor cooling combines the compressor and heat exchanger function to stretch turbopropulsion system operational limits. Axial compressor performance with blade passage heat extraction is assessed with computational experiments and meanline …
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Numerical Study of the Stability of Embedded Supersonic Compressor Stages
A numerical case study of a multistage compressor with relative supersonic rotors is presented. The purpose of the investigation was to determine the flow instability mechanism of the UEET compressor and its relation to the rotor shock structure in the relative velocity reference frame. The …
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Aerodynamic design of an aspirated counter-rotating compressor
A primary goal in compressor design for jet engines is the reduction of size and weight. This can be achieved by increasing the work output per stage, thereby reducing the required number of stages. In this thesis, the aerodynamic design of a high speed compressor that produces a pressure ratio of …
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An improved blade passage model for estimating off-design axial compressor performance
Accurate estimates of multistage axial compressor performance at off-design operating conditions are essential to the determination of key performance metrics of aircraft gas turbine engines, such as fuel burn, thrust output, and stable operating range. However, conventional RANS based CFD …
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The effect of reaction on compressor performance
… the efficiency or the operating range of a compressor. A particular difficulty in understanding the effect of reaction is that the rotor and stator have a natural asymmetry caused by the centrifugal effects in the rotor boundary layer, being much larger than those in the stator boundary …