METHOD OF CARRYING-OUT AERODYNAMIC EXPERIMENT Russian patent published in 1994 - IPC

FIELD: experimental aerodynamics. SUBSTANCE: method involves the steps of: fixing model 1 in a working portion of wind tunnel, producing a steady flow with predetermined parameters, measuring aerodynamic loads upon model 1 and parameters of jet 12 outgoing from flow-throw duct 3 and measuring aerodynamic loads upon stern portion 5 of model 1. The method is characterized in that model 1 which is affixed to side holder 5 and stern portion 5 of which is attached to the main one through intramodel strain-gauge scales 9 with air intake 2 working and air intake 2 closed by plug 10 is additionally tested but at simulating the operation of a jet engine by feeding compressed air to nozzle 4 through duct 11 inside holder 6 at equality of pressure in the outlet cross-section of nozzle 4 in these two tests. The difference of loads acting upon stern portion 5 of model 1 which is subtracted from the load upon model 1 determined from extrapolation. EFFECT: enhanced reliability and accuracy. 3 cl, 2 dwg