University of Illinois Urbana-Champaign

Evaluation of laser droppler velocimeter performance using MIE scattering theory

Adrian, Ronald J.; Earley, Walter L.

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https://hdl.handle.net/2142/112220

Description

Title
Evaluation of laser droppler velocimeter performance using MIE scattering theory
Author(s)
  • Adrian, Ronald J.
  • Earley, Walter L.
Issue Date
1986-02
Keyword(s)
  • Laser Doppler Velocimeter
  • Mie Scattering Theory
Abstract
A computer code has been developed to evaluate the performance parameters of a general fringe mode FDV, including Doppler signal strength, pedestal signal strength, and signal-to-shot noise ratio, using the Mie scattering theory for spherical scattering particles. The variable parameters in the program are the particle size and refractive index, the laser wavelength, the refractive index of the fluid surrounding the particle, the geometry of the illuminating beams, the direction of observation of the scattered light, and the size and shape of the light receiving aperture. Results are presented in the form of global maps of the SNR for all angles of observation, and expanded maps of the SNR as a function of position on a symmetrically located back scatter light receiving aperture. In addition, the effects of receiving aperture design have been investigated by calculating the total light flux through various shaped apertures as a function of aperture size. This paper originally appeared in the Proceedings of the Minnesota Symposium on Laser Anemometry, Bloomington, MN, October 22-24, 1975
Publisher
Department of Theoretical and Applied Mechanics. College of Engineering. University of Illinois at Urbana-Champaign
Series/Report Name or Number
  • TAM R 479
  • 1986-6004
ISSN
0073-5264
Type of Resource
text
Language
eng
Permalink
http://hdl.handle.net/2142/112220
Sponsor(s)/Grant Number(s)
National Science Foundation DES 74 14962 86/02
Copyright and License Information
Copyright 1986 Board of Trustees of the University of Illinois

Owning Collections

Technical Reports - Theoretical and Applied Mechanics (TAM) PRIMARY
TAM technical reports include manuscripts intended for publication, theses judged to have general interest, notes prepared for short courses, symposia compiled from outstanding undergraduate projects, and reports prepared for research-sponsoring agencies.