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Optical Engineering

Effect of composition change on temperature measurements in a premixed flame by holographic interferometry
Author(s): Chi-Chung Chen; Keh-Chin Chang; Sheng-Mao Tieng
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Paper Abstract

Application of holographic interferometry to nonintrusive temperature measurements in flames has been demonstrated as a viable means in engineering practices. However, the effect of composition changes on the previous investigations was often either neglected or assumed by a simpler relationship owing to lack of the distribution information of gas composition. This study investigates the effect of composition changes on temperature measurements using holographic interferometry by analyzing the composition of combustion gas using a gas chromatograph and measuring temperatures with a thermocouple to provide a comparison basis. Results are given for axisymmetric, laminar, premixed propane-air flames. Fuel-rich flame is found to have complex flame structure, and the effect of composition changes on the reconstruction of interferometric temperatures has to be taken into account. On the other hand, the flame structure in the fuel-lean case is much simpler, and using the linear distribution of molar refractivity in reconstruction of interferometric temperatures yields satisfactory results.

Paper Details

Date Published: 1 February 1992
PDF: 10 pages
Opt. Eng. 31(2) doi: 10.1117/12.56081
Published in: Optical Engineering Volume 31, Issue 2
Show Author Affiliations
Chi-Chung Chen, National Cheng Kung Univ. (Taiwan)
Keh-Chin Chang, National Cheng Kung Univ. (Taiwan)
Sheng-Mao Tieng, National Cheng Kung Univ. (Taiwan)


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