Effect of Jet Exit Vanes on Flow Pulsations in an Open-jet Wind TunnelNational Aeronautics and Space Administration, Scientific and Technical Information Branch, 1985 - Blades - 214 pages |
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16 18 Frequency 18 20 Frequency 5500 Time delay 7-Meter Tunnel autocorrelation functions autocorrelation of streamwise autocorrelation of vertical autopower spectral density baseline configuration collector Concluded configuration at q Continued Dynamic-flow quality exit vane configurations Figure 21 figures 15 flow pulsations fluctuating velocity components ft/sec Gww Hz-1 history of streamwise history of vertical history plots jet exit configuration jet exit vanes Langley lb/ft² Figure levels in mode msec d msec f Normalized autocorrelation open test section open test-section configuration periodic portion PSD and autocorrelation PSD of streamwise PSD of vertical pulsation dampening quality for baseline quality for configuration rectangular vanes reducing the flow RMS velocity fluctuations shown in figure speed ranges streamwise velocity fluctuations total mean-square value tunnel speed upstream at jet vertical velocity fluctuations View looking upstream Wind Tunnel wire wwwww x-wire probe მს تسلسل سال سلسل سيا لس لسا