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Supersonic gas compressor

United States Patent

November 13, 2007
View the Complete Patent at the US Patent & Trademark Office
A gas compressor based on the use of a driven rotor having a compression ramp traveling at a local supersonic inlet velocity (based on the combination of inlet gas velocity and tangential speed of the ramp) which compresses inlet gas against a stationary sidewall. In using this method to compress inlet gas, the supersonic compressor efficiently achieves high compression ratios while utilizing a compact, stabilized gasdynamic flow path. Operated at supersonic speeds, the inlet stabilizes an oblique/normal shock system in the gasdyanamic flow path formed between the rim of the rotor, the strakes, and a stationary external housing. Part load efficiency is enhanced by the use of a pre-swirl compressor, and using a bypass stream to bleed a portion of the intermediate pressure gas after passing through the pre-swirl compressor back to the inlet of the pre-swirl compressor. Inlet guide vanes to the compression ramp enhance overall efficiency.
Lawlor; Shawn P. (Bellevue, WA), Novaresi; Mark A. (San Diego, CA), Cornelius; Charles C. (Kirkland, WA)
Ramgen Power Systrms, Inc. (Bellevue, WA)
11/ 087,336
March 23, 2005
STATEMENT OF GOVERNMENT INTEREST This invention was made with United States Government support under Contract No. DE-FC026-00NT40915 awarded by the United States Department of Energy. The U.S. Government has certain rights in the invention.