Aspirated High Pressure Compressor
Abstract
The design and test of a two-stage, vaneless, aspirated counter-rotating fan is presented in this paper. The fan nominal design objectives were a pressure ratio of 3:1 and adiabatic efficiency of 87%. A pressure ratio of 2.9 at 89% efficiency was measured in the tests. The configuration consists of a counter-swirl-producing inlet guide vane, followed by a high tip speed (1450 feet/sec) non-aspirated rotor, and a counter-rotating low speed (1150 feet/sec) aspirated rotor. The lower tip speed and lower solidity of the second rotor results in a blade loading above conventional limits, but enables a balance between the shock loss and viscous boundary layer loss, the latter of which can be controlled by aspiration. The aspiration slot on the second rotor suction surface extends from the hub up to 80% span, with a conventional tip clearance, and the bleed flow is discharged at the hub. The fan was tested in a short duration blow down facility. Particular attention was given to the design of the instrumentation to obtain efficiency measurements.
Document Details
- Document Type
- Technical Report
- Publication Date
- Aug 01, 2006
- Accession Number
- ADA456585
Entities
People
- Alan H. Epstein
- Ali A. Merchant
- David V. Parker
- Fritz Neumayer
- Gerald R. Guenette
- Jack L. Kerrebrock
- Jean-francois Onnee
- R. C. Maclaurin
Organizations
- Massachusetts Institute of Technology