High Pressure Compressor Using an Axial-Flow, Mixed-Flow, and Centrifugal Stage with Interstage and Disc

Award Information
Agency: Department of Defense
Branch: Air Force
Contract: N/A
Agency Tracking Number: 36355
Amount: $99,944.00
Phase: Phase I
Program: SBIR
Awards Year: 1997
Solicitation Year: N/A
Solicitation Topic Code: N/A
Solicitation Number: N/A
Small Business Information
4 Billings Farm Road, White River Jct, VT, 05001
HUBZone Owned: N
Woman Owned: N
Socially and Economically Disadvantaged: N
Principal Investigator
 Mr Tsukasa Yoshinaka
 (802) 296-2321
Business Contact
Phone: () -
Research Institution
High Pressure Compressor (HPC) pressure ratios of up to 40:1 are required to achieve 100:1 cycle pressure ratios. A multi-stage axial HPC configuration will be too long and heavy and too inefficient in later stages (at these higher pressure ratios). Increased tip clearance to span ratio will also lead to low efficiency and surge margin for the axial HPC. The innovations of the proposed work include: (1) an axial-flow, mixed-flow, and centrifugal compressor (AMC) with each operating at or near its respective optimum specific speed (with a common rotational speed for all three stages); and (2) the diffuser system of the mixed-flow and centrifugal stages lending itself to using the bypass flow for interstage and discharge cooling. The interstage cooling improves cycle efficiency and specific thrust (thrust/mass flow) and allows for a smaller third stage impeller. The discharge cooling provides increased thrust/weight ratio for a given turbine inlet temperature. Phase I includes detailed cycle evaluations, heat transfer calculations, and preliminary stage designs (including novel weight/strength treatments). A developed HPC design will be provided in Phase II. Simplicity, ruggedness, improved performance, and optimized frontal area are implicit with the AMC configuration versus other existing or potential HPC options.

* Information listed above is at the time of submission. *

Agency Micro-sites

SBA logo
Department of Agriculture logo
Department of Commerce logo
Department of Defense logo
Department of Education logo
Department of Energy logo
Department of Health and Human Services logo
Department of Homeland Security logo
Department of Transportation logo
Environmental Protection Agency logo
National Aeronautics and Space Administration logo
National Science Foundation logo
US Flag An Official Website of the United States Government