Accession Number : ADA225662


Title :   Stage Effects on Stalling and Recovery of a High-Speed 10-Stage Axial- Flow Compressor


Descriptive Note : Final rept. 1 Feb 1987-1 Jan 1989,


Corporate Author : WRIGHT RESEARCH AND DEVELOPMENT CENTER WRIGHT-PATTERSON AFB OH


Personal Author(s) : Copenhaver, William W


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a225662.pdf


Report Date : Jun 1990


Pagination or Media Count : 401


Abstract : Results of a High-speed 10-stage axial-flow compressor test involving overall compressor and individual stage performance while stalling and operating in quasi-steady rotating stall are described. Test procedures and data acquisition methods used to obtain the dynamic stalling and quasi-steady in- stall data are explained. Unstalled and in-stall data obtained from the compressor operating at five different shaft speeds and one off-schedule variable vane condition are presented. The effects of compressor speed and variable geometry on overall compressor in-stall pressure rise and hysteresis extent are illustrated through the use of quasi-steady stage temperature and pressure rise characteristics. The results indicate that individual stage performance during overall compressor. Time resolved install data acquired at two different shaft speeds are presented in support of the notion that stage operation varies significantly from entrance to exit of the compressor. Both time-averaged and time-resolved individual stage results suggest that stage matching is important, not only for unstalled performance but also for in-stall performance and recoverability from stall. The measured high-speed 10-stage test compressor individual stage pressure and temperature characteristics were input into a stage-by-stage dynamic compressor performance model. The analytical model had been previously validated for the prediction of low-speed compressor stalling and in-stall performance. (SDW)


Descriptors :   *AXIAL FLOW COMPRESSORS , MATHEMATICAL MODELS , METHODOLOGY , TEMPERATURE , DYNAMICS , RATES , TEST METHODS , VARIATIONS , LOW VELOCITY , STALLING , PRESSURE , OPERATION , DATA ACQUISITION , GEOMETRY , SHAFTS(MACHINE ELEMENTS) , MATCHING , ROTATION , EXITS , HYSTERESIS , VELOCITY , PRESSURE GRADIENTS


Subject Categories : Hydraulic and Pneumatic Equipment


Distribution Statement : APPROVED FOR PUBLIC RELEASE