Development, Application, and Design Specifications of a Laser Doppler Particle Sensor for the Measurement of Particle Velocities in Two Phase Rocket Exhausts, Volume I.

Development, Application, and Design Specifications of a Laser Doppler Particle Sensor for the Measurement of Particle Velocities in Two Phase Rocket Exhausts, Volume I.
Author: Stanford University. Department of Aeronautics and Astronautics
Publisher:
Total Pages: 200
Release: 1968
Genre:
ISBN:
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In this report, the development of a prototype instrument to measure the velocity of particles in the exhaust of a solid rocket motor is described. The measurement technique is based upon the doppler-shifted scattering of a focused laser beam by the particle matter in a flow. The absolute value of frequency is converted into velocity information by a Fabry Perot interferometer, photomultiplier, electronic signal processing circuits and a suitable recording device. The recorded data is in the form of signal number count rate and maximum signal amplitude as a function of velocity at a specific point in the flow. This volume describes the development of the prototype instrument. (Author).

Development, Application, and Design Specifications of a Laser Doppler Particle Sensor for the Measurement of Particle Velocities in Two Phase Rocket Exhausts, Volume II.

Development, Application, and Design Specifications of a Laser Doppler Particle Sensor for the Measurement of Particle Velocities in Two Phase Rocket Exhausts, Volume II.
Author: Stanford University. Department of Aeronautics and Astronautics
Publisher:
Total Pages: 190
Release: 1968
Genre:
ISBN:
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The development of a prototype instrument to measure the velocity of particles in the exhaust of a solid rocket motor is described. This volume contains the design specifications for the prototype instrument used to obtain data on a five thousand (5,000) pound thrust rocket engine. (Author).

The Use of a Laser Doppler Velocimeter in Supersonic Flow

The Use of a Laser Doppler Velocimeter in Supersonic Flow
Author: William Joseph Yanta
Publisher:
Total Pages: 64
Release: 1971
Genre: Aerodynamics, Supersonic
ISBN:
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Results are presented for an experimental program which investigated the application of an LDV technique in supersonic flows. This paper presents an analysis of the behavior of light-scattering particles in rapidly accelerating or shock decelerated flows, an evaluation of particle production techniques and the results of several velocity measurements. Measurements included the velocity distribution along the nozzle centerline and flow over a diamond airfoil in a Mach 3 tunnel and velocity profiles for a turbulent boundary layer in a Mach 4.8 facility. It is demonstrated that LDV measurements can be made consistently with errors of less than five percent if the particle lag is considered. (Author).

Investigation of Particle-size Determination from the Optical Response of a Laser-doppler Velocimeter

Investigation of Particle-size Determination from the Optical Response of a Laser-doppler Velocimeter
Author: Dana G. Andrews
Publisher:
Total Pages: 86
Release: 1971
Genre: Doppler effect
ISBN:
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The intensity of laser light back-scattered from a particle and transmitted by a Fabry-Perot interferometer is used to determine particle-size. The instrument's optics and electronics are calibrated by examining stationary particles of known diameter resting on a non-reflective glass slide. The response of the instrument is determined by comparing measured intensities with theoretical values calculated as a complex function of particle size, refractive index and ray geometry. The results show that the measured intensities do approximate the theoretical variation with particle size and in the range of particle diameters measured (1-10 microns), the error is less than one micron. (Author).