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Abstract:
This report presents the results of a research program on rotating stall in axial flow compressors and jet engines. The program had three major objectives which were: (1) develop an analysis for a three-dimensional, time- variant rotating stall and separation theory, (2) develop analysis for poststall operation/recovery and aerodynamically induced exotic metal combustion, and (3) consider the effects of distortion, water ingestion, and nuclear blasts on axial flow compressors. The work done towards accomplishing objective (1) is reported in Volume I. The work done towards the accomplishment of the remaining two objectives is reported in Volume II presented herein. The experimental studies were performed on a low-speed rotating annular cascade facility and on a J-85-5 turbojet engine. The low-speed tests investigated the influence of rotor-stator interference on the work performed by a rotor in a stage prior to and during rotating stall, both with and without inlet distortion. The J-85 experiments consisted of post-stall temperature measurements in the compressor and a demonstration of stall anticipation and stall recovery on this engine with a previously developed rotating stall control system in operation. In addition, some blast tests were performed on the J-85 with the stall control system both operative and inoperative. Comparisons are made between the low-speed experimental results and the predictions of a previously developed two- dimensional rotating stall stability theory. In addition, post-stall analyses were performed on both the low-speed results and the J-85 results for comparison with the predictions of Day, Greitzer, and Cumpsty. (Author)
| Description: |
Final rept. 15 Aug 79-15 Oct 82 |
| Pages: |
312 |
| Report Date: |
JAN 1983 |
| Contract Number: |
F33615-79-C-2023 |
| Report Number: |
A547821 |
Report Unavailable |
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