Laser Velocimeter Systems Analysis Applied to a Flow Survey Above a Stalled Wing |
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10-foot tunnel 2.5 Frequency Airfoil surface angle of attack average velocity C₁ calculated common volume Correlation coefficient Correlations and Fourier Crosscorrelations and autocorrelations data-acquisition dropout zone Figure 58 flow field Fourier transforms free-stream velocity fringe pattern high-speed burst counter Histogram moments Histograms above transducer histograms with UL kerosene kurtosis Langley Research Center laser velocimeter measured m/sec m/sec Mach number mean velocity measured histograms moments for scan msec Frequency normalized to peak percent 0 15 photomultiplier Power spectrum pressure at transducer pressure pulse pressure transducers prime direction probability density function reference clock Reynolds number scan above transducer shown in figure Simulated histograms Skew smoke spectrum of pressure stalled wing standard deviation trailing edge transducer 9 transducer position transform normalized transforms of correla tubes U₁ UL component V₁ velocity and standard velocity bias velocity interval velocity measurements vortex model vortices Սլ