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Bleed Induced Distortion in Axial Compressors
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: In this paper, the influence of nonuniform bleed extraction on the stability of an axial flow compressor is quantified. Nonuniformity can be caused by several geometric factors (for example, plenum chamber size or number ...
Non-Dimensional Parameters for Comparing Conventional and Counter-Rotating Turbomachines
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Counter-rotating turbomachines have the potential to be high efficiency, high power density devices. Comparisons between conventional and counter-rotating turbomachines in the literature make multiple and often contradicting ...
Modeling Nonuniform Bleed in Axial Compressors
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: The coupling between the bleed system and the flowfield of a downstream compressor stage is studied using two approaches. In the first approach, threedimensional, full annulus, unsteady computations simulate the flow in a ...
A Computational and Experimental Compressor Design Project for Japanese and British High-School Students
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: This paper describes an innovative, three-day, turbomachinery research project for Japanese and British high-school students. The project is structured using modern teaching theories that encourage student curiosity and ...
Loss in Axial Compressor Bleed Systems
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Loss in axial compressor bleed systems is quantified and the loss mechanisms are identified to determine how efficiency can be improved. For a given bleed air pressure requirement, reducing bleed system loss allows air to ...
Student Research Projects With Industrial Impact
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: This paper describes six final year undergraduate research projects supported by a collaboration between the Whittle Laboratory at the University of Cambridge and Reaction Engines (RE), a UK aerospace company. The collaboration ...
Super Aggressive S-Ducts for Air Breathing Rocket Engines
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Air breathing rocket engines require turbomachinery and ducting that is substantially lighter than that used in ground-based or aerospace gas turbines. In order to reduce the weight of the axial compressor, the design of ...
Design and Analysis of a Liftfan for eVTOL Aircraft
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Ducted liftfans provide greater hovering efficiency to electric vertical take-off and landing aircraft than open propellers of equal disk area. Liftfans are designed with minimized length to limit propulsor weight added ...
The Role of Tip Leakage Flow in Spike-Type Rotating Stall Inception
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: This paper describes the role of tip leakage flow in creating the leading edge separation necessary for the onset of spike-type compressor rotating stall. A series of unsteady multipassage simulations, supported by ...