TASK II STAGE DATA AND PERFORMANCE REPORT FOR INLET FLOW DISTORTION TESTING VOLUMEⅡEVALUATION OF RANGE AND DISTORTION TOLERANCE FOR HIGH MACH NUMBER TRANSONIC FAN STAGES

摘要

A variable geometry fan stage consisting of a 1500 ft/sec tip speed, medium aspect ratio rotor, a variable camber inlet guide vane and a variable stagger stator was tested under conditions of tip radial and 90° one-per-rev circumferential distorted inlet flow. Overall performance and stall limits were determined for each inlet condition at 70 ％, 90 ％ and 100 ％ of design speed. Extensive-surveys of flow conditions were made for the case of circumferential distortion. In addition, blade element data were obtained when testing with radial distortion.nThis report is the second of two volumes on the NASA Task II stage data and performance for inlet flow distortion testing. It contains a tabulation of the radial distortion blade element data in Appendix B along with flow survey data and vector diagram results from the circumferential distortion screen rotation tests in Appendix C.