Wind Tunnel Investigation of the Throttle for the Proposed AEDC Multipurpose Low Speed Wind Tunnel

摘要

A test was conducted in the V/STOL Pilot Tunnel of the Propulsion Wind Tunnel Facility to determine the effects of the throttle on test section flow and to evaluate the performance of the throttle. The throttle produced no measurable effects on the test section flow as long as the fan was not stalled. The throttle losses should be variable so that the power absorbed by the throttle can be matched to the model power input. Operating the air exchanger at air exchange ratios above 20 percent increased the allowable throttle loss to model power input mismatch. The measured throttle loss coefficients agreed well with predicted performance. Additional testing will be required to determine the effects of the throttle on model forces. (Author)