Accession Number : AD0726605

Title :   Method of Determining the Velocity Pulsation of the Effective Flow of a Hypersonic Wind Tunnel,

Corporate Author : FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OHIO

Personal Author(s) : Novikov,L. V. ; Bakum,B. I.

Report Date : 22 JAN 1971

Pagination or Media Count : 10

Abstract : Development is reported of a method of studying the velocity pulsations of a high-temperature hypersonic flow, based on the existence of an interrelation between the total stagnation pressure pulsations behind the direct shock and the longitudinal velocity pulsations. The theoretical possibility of studying velocity pulsations of a hypersonic working flow in an aerodynamic facility with the aid of miniature pressure transducers is shown. The method developed makes it possible to obtain data concerning the velocity pulsations of a hypersonic working flow with an rms error in amplitude of plus or minus 26 percent and an rms error in frequency of plus or minus 1.5 percent in the frequency range from 20-6000 Hz and with an rms error in amplitude of plus or minus 7 percent and an rms error in frequency of plus or minus 0.3 percent in the frequency range from 0 to 120 Hz. (Author)

Descriptors :   (*HYPERSONIC WIND TUNNELS, VELOCITY), (*HYPERSONIC FLOW, ANALYSIS OF VARIANCE), (*FLOW FIELDS, PULSES), SHOCK WAVES, PRESSURE GAGES, TRANSDUCERS, ACCURACY, USSR

Subject Categories : Test Facilities, Equipment and Methods
      Fluid Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE