Development of a Simplified Optical Technique for the Simultaneous Measurement of Particle Size Distribution and VelocityNational Aeronautics and Space Administration, Scientific and Technical Information Branch, 1983 - Laser Doppler velocimeter - 26 pages |
Common terms and phrases
AMPLITUDE a VOLTAGE Amplitude data graphs amplitude ratio Bourke develop dimensionless DISTRIBUTION AND VELOCITY Doppler Effect dual-beam Durst and Whitelaw experimental procedure Final correlation Fluid Mechanics frequency fringe pattern fringe spacing FRINGE WIDTH INCHES Huffaker indicated with Figures intensity interference James Lee Smith laser beam laser Doppler anemometry laser Doppler velocimeters LDA devices light source lines per inch Marshall Space Flight measure particle measured velocity MEASUREMENT OF PARTICLE MIRROR monochromatic multiple particles N₁ normal distribution normal particle number density number of particles obtained optical arrangement oscilloscope particle diameter distribution PARTICLE DIAMETER INCHES particle passes particle size distributions photodetector Photograph of velocity photomultiplier tube PM TUBE projected grating proof of principle range Reference beam reference-beam relationship between particle Ronchi rulings sandpaper particle diameter scattered light scattered-beam Scattering Theory SIMPLIFIED OPTICAL TECHNIQUE SIMULTANEOUS MEASUREMENT Space Flight Center spectrum analyzer Superfine sandpaper test sample test surface velocity and particle velocity signal X)² EXP