Response of Optical Fiber Thermometer with Blackbody Cavity Sensor : Aiming to Measure the Gas Temperature inside Internal Combustion Engine

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概要

• 論文の詳細を見る

• An optical fiber thermometer (OFT) having a sapphire tip of 1.27 mm diameter sputtered with platinum as a sensor and heated to 1000℃ was rapidly inserted into an air jet by using pendulum motion. The time constant, the heat-transfer coefficient of OFT, and the correlation of Nu=(3.07+0.529Re^<0.5>)Pγ^<0.38> for Re=380〜1800 were obtained. OFT output shows a very slow response in the quasi-steady period but a considerably quick response in the transient period. Frequency response of OFT was investigated by Fourier analysis and analytical simulation was carried out to obtain the gas temperature from the temperature variation indicated by OFT. Such a high resolution of OFT in a commercially available size such as 0.1℃ is found to be necessary for the measurement of gas temperature in an engine. The output signal of OFT should be cut off at the 30th harmonic by a low-pass filter, since the large error in obtaining the gas temperature is caused by the higher-frequency noise. A reduction error constant is proposed as a reduction error index.

• 一般社団法人日本機械学会の論文
• 1994-08-15

著者

• ZHENG Qi

  Department of Superalloys, Institute of Metal Research, Chinese Academy of Sciences

• Zheng Qi

  Department Of Mechanical Engineering Faculty Of Engineering Yokohama National University

• Torii Kahoru

  Department of Mechanical Engineering, Faculty of Engineering, Yokohama National University

• Torii Kahoru

  Department Of Mechanical Engineering And Materials Science Yokohama National University

• Torii Kahoru

  Department Of Mechanical Engineering Faculty Of Engineering Yokohama National University

• Zheng Qi

  Department Of Biochemistry And Molecular Biology College Of Life Science Nanjing Agricultural Univer

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