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Journal of Flow Visualization and Image Processing
SJR: 0.161 SNIP: 0.312 CiteScore™: 0.5

ISSN 印刷: 1065-3090
ISSN オンライン: 1940-4336

Journal of Flow Visualization and Image Processing

DOI: 10.1615/JFlowVisImageProc.v2.i3.90
pages 299-310

TOMOGRAPHIC DECONVOLUTION OF LASER SPECKLE PHOTOGRAPHY FOR AXISYMMETRIC FLAME TEMPERATURE MEASUREMENT

T. E. Walsh
Department of Mechanical Engineering, Texas A&M University, College Station, Texas 77843-3123
Kenneth D. Kihm
Texas A&M University College Station, TX; and Micro/Nano-Scale Fluidics and Energy Transport Laboratory, University of Tennessee, Mechanical, Aerospace and Biomedical Engineering Department, Knoxville TN 37996-2210, USA

要約

A laser speckle photography technique can nonintrusively measure thermal flow properties such as medium density, index of refraction or temperature. The laser specklegram records a line-of-sight or path-integrated information on these properties. For varying properties in a medium along the optical path, a mathematical technique called a tomography deconvolves cross-sectional information out of the projected measurement. The present work will outline the underlying principles of optical tomography and show how to apply it to the diagnostic technique of laser speckle photography. Comparisons of temperature measurements using a thermocouple probe against the temperature conversion from the specklegram data have been made for laminar flames. The speckle photography technique shows good potential as a new nonintrusive temperature measurement tool for various thermal flows.


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