Measurement of the transient temperature of gas by laser interferometry

Yoshisuke Hamamoto; Eiji Tomita; Tadayoshi Okada

doi:10.1299/jsmeb1988.32.2_247

Measurement of the transient temperature of gas by laser interferometry

Yoshisuke Hamamoto, Eiji Tomita, Tadayoshi Okada

Graduate School of Natural Science and Technology

Research output: Contribution to journal › Article › peer-review

8 Citations (Scopus)

Abstract

In order to measure the transient temperature of gas, a laser interferometry was applied. When the density of gas changes, the effective optical path length of the test beam changes with a corresponding change of the refractive index. The change in temperature of the gas therefore can be determined by measuring the pressure and the shift of the interference fringes with a pair of phototransistors. In this study, examples of the temperature change measurement of the gas owing to only the expansion, to the compression and expansion with a piston motion, and to the compression with flame propagation were described. It is recognized that interferometry is a useful method for the measurement of the transient temperature of the gas in the field of combustion research.

Original language	English
Pages (from-to)	247-251
Number of pages	5
Journal	JSME International Journal, Series B: Fluids and Thermal Engineering
Volume	32
Issue number	2
DOIs	https://doi.org/10.1299/jsmeb1988.32.2_247
Publication status	Published - 1989

ASJC Scopus subject areas

Mechanical Engineering
Physical and Theoretical Chemistry
Fluid Flow and Transfer Processes

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T1 - Measurement of the transient temperature of gas by laser interferometry

AU - Hamamoto, Yoshisuke

AU - Tomita, Eiji

AU - Okada, Tadayoshi

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AB - In order to measure the transient temperature of gas, a laser interferometry was applied. When the density of gas changes, the effective optical path length of the test beam changes with a corresponding change of the refractive index. The change in temperature of the gas therefore can be determined by measuring the pressure and the shift of the interference fringes with a pair of phototransistors. In this study, examples of the temperature change measurement of the gas owing to only the expansion, to the compression and expansion with a piston motion, and to the compression with flame propagation were described. It is recognized that interferometry is a useful method for the measurement of the transient temperature of the gas in the field of combustion research.

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