A Laser Velocimeter Flow Survey Above a Stalled WingNational Aeronautics and Space Administration, Scientific and Technical Information Office, 1978 - Flow meters - 134 pages |
Contents
INTRODUCTION | 1 |
DATA ACQUISITION AND REDUCTION | 7 |
Statistical moments | 13 |
2 other sections not shown
Common terms and phrases
airfoil crest airfoil surface amplitude angle of attack autocovariance function Bragg cell C₁ calculated cathode ray tube chord chordwise velocity profiles Contours of constant crest region data rate downstream direction ensemble mean Excess flow field flow unsteadiness flow visualization free shear mixing high-speed burst counter Histograms in scans jetlike flow lag products Langley Research Center laser beam laser velocimeter leading edge lower surface m/sec Figure 25 m/sec V₁ Mach number mixing layer region moments for scan msec number of lag number of measurements optics system percent 15 Scan percent Scan Power spectrum probability density function resultant mean velocity resultant standard deviation reversed velocity region Run Scan sample volume scan 19 seed particle shear mixing layer shown in figure Statistical moments time-averaged trailing edge U₁ UL,e V/STOL velocity component velocity gradients velocity measurements vertical VL component VL,e wake region Warren H wing center span Yf/c Yf/c Figure