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Experimental investigation of high-pressure steam induced stall of a transonic rotor

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Author
Koessler, Joseph J.
Date
2007-06
Advisor
Hobson, Garth V.
Second Reader
Gannon, Anthony J.
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Abstract
Steam leakage from the catapult system of U.S. Navy aircraft carriers can stall the compressors of modern jet aircraft if ingested during takeoff. This phenomenon, known as "pop stall", is of particular concern to the U.S. Navy as their current fleet of F404 engines age, the newer F414 engine comes online, and the F-35C variant of the Joint Strike Fighter begins service. The age of the F404 engine, the untested steam performance of the two stage fan in the F414 engine, and the low, serpentine intake of the F-35C make these engines and aircraft susceptible to steam-induced stall during takeoff. This study examines the high pressure steam-induced stall of a transonic rotor at both subsonic and transonic speeds. Steam stall was induced at 70%, 90% and 95% of rated rotor speed and the performance map of the rotor was re-established for 70%, 90%, 95%, and 100% of rated speed. The stall margin of the rotor and the presence of a stall precursor during both normal and steam ingested operation was investigated. In addition, the inlet nozzle mass flow measurements of the rig were tested against measurements in the inlet bellmouth to determine the feasibility of a shorter intake to introduce more inlet distortion into the flow.
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This publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States.
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http://hdl.handle.net/10945/3458
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  • 1. Thesis and Dissertation Collection, all items

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    Computational fluid dynamic model of steam ingestion into a transonic compressor 

    Hedges, Collin R. (Monterey, California. Naval Postgraduate School, 2009-06);
    The U.S. Navy's concern with steam-induced jet engine stall has become more pertinent with the introduction of the F-35C. During take offs on aircraft carriers, steam from aging catapult systems can potentially seep onto ...
  • Thumbnail

    Inlet flow-field measurements of a transonic compressor rotor prior to and during steam-induced rotating stall 

    Payne, Thomas A. (Monterey, California. Naval Postgraduate School, 2005-12);
    Steam leakage from an aircraft carrier catapult is sometimes ingested by the aircraft's engines upon launch which may induce compressor stall. Investigation of the phenomenon known as a "pop stall" is of particular importance ...
  • Thumbnail

    Experimental investigation of high-pressure steam-induced surge in a transonic compressor stage 

    Hurley, Andrew M. (Monterey California. Naval Postgraduate School, 2008-06);
    Operational experience indicates that steam escaping from carrier catapults has the potential to induce stall or surge in the compressors of jet aircraft during takeoff. As the carrier fleet ages and the Navy transitions ...
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