✦ LIBER ✦

An improved thermocouple technique for measurement of fluctuating temperatures in flames

✍ Scribed by Masashi Katsuki; Yukio Mizutani; Yasushi Matsumoto

Publisher: Elsevier Science
Year: 1987
Tongue: English
Weight: 687 KB
Volume: 67
Category: Article
ISSN: 0010-2180
DOI: 10.1016/0010-2180(87)90011-3

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✦ Synopsis

When we use an electrically compensated thermocouple for its frequency response to measure temperatures in turbulent flames, considerable errors occur due to the temperature-and velocity-dependences of time constant of response, as well as surface reactions and radiative heat losses. An improved method of reproducing the patterns of temperature fluctuation was developed, in which a thermocouple was coated to be free from the effects of surface reactions and its unlinearized output was subjected to the thermal inertia compensation; then the compensated signals were converted into temperatures following the modified EMF characteristics of the thermocouple. The accuracy was examined in both a laminar diffusion flame and a turbulent premixed flame.

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