An Argument for Enhancement of the Current Inlet Distortion Ground Test Practice for Aircraft Gas Turbine Engines

[+] Author and Article Information
Milt Davis, Alan Hale, Dave Beale

Sverdrup Technology, Inc., Arnold Engineering Development Center, AEDC, Arnold Air Force Base, TN 37389

J. Turbomach 124(2), 235-241 (Apr 09, 2002) (7 pages) doi:10.1115/1.1451087 History: Received November 17, 2000; Online April 09, 2002
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Typical distortion screen and corresponding distortion pattern
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Schematic of airjet distortion generator
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Simulation of time-variant distortion with steady-state patterns
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Overall TEACC methodology
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Radial-circumferential view of 3-D grid for Rotor 1B
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Rotor 1B distortion screen definition
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Comparison of TEACC calculations with distortion to that observed experimentally
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Dynamic distortion generator concept and corresponding airflow reduction behind the screen
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Flow coefficient at stall versus distortion rotation rate 12
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Effect of rotating screen on Rotor 1B stability limit
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Example of induced swirl at screen boundary location—co-rotation shown
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Comparison of blade overall performance with swirl at a constant airflow rate
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Comparison of flowfield swirl before and after the rotor against the clean inlet for both co and counter-rotation swirl
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Comparison of blade performance with co and counter-rotation present




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