The effect of ejector augmentation on test-section flow quality in the Calspan 8-ft transonic wind tunnelTests to determine the flow disturbances effects of four ejectors located in the corners just downstream of the diffuser in the Calspan wind tunnel are described. The flow quality in the nonejector mode is employed as the base-line configuration, and operating parameters are compared with data from other wind tunnels. During tests with the ejectors working, fluctuation levels increased between Mach 0.4-0.6, while temperature and vorticity levels remained constant. The ejector exhibited broad spectrum noise typical of free jet noise, yet static pressure measurements revealed only a slight increase in the broadband rms levels with the ejectors on, indicating negligible disturbances upstream caused by the ejectors. Choking the diffuser eliminated the jet noise, and the use of ejectors in the Mach range considered is concluded to cause no significant degradation in the Calspan tunnel flow quality.
Document ID
19820041123
Acquisition Source
Legacy CDMS
Document Type
Conference Proceedings
Authors
Rose, W. C. (Rose Engineering and Research, Inc. Incline Village, NV, United States)
Hanly, R. D. (Rose Engineering and Research, Inc. Incline Village, NV, United States)
Steinle, F. W., Jr. (NASA Ames Research Center Moffett Field, CA, United States)
Chudyk, D. W. (Calspan Advanced Technology Center Buffalo, NY, United States)