Rotating Stall Investigations. Volume 2. Experimental Studies
Final rept. 15 Aug 1979-15 Oct 1982
ARVIN/CALSPAN ADVANCED TECHNOLOGY CENTER BUFFALO NY AERODYNAMIC RESEARCH DEPT
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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 operationrecovery 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.
- Hydraulic and Pneumatic Equipment
- Fluid Mechanics