Optical diagnostics techniques to measure diesel combustion flame temperatures are useful for evaluation and control of combustion processes. In this paper, diesel combustion flame temperatures are measured based on a multicolor pyrometry method respectively adopting an optical fiber spectrometer and a color charge coupled device (CCD). The intensity ratios for various wavelengths/wavebands are utilized as the analytical variables to deduce the temperatures to avoid the need to calibrate each system for the specific geometry conditions. The measured multicolor data can determine the temperature and the soot factor . Extra data collected at many wavelengths is used to reduce the noise and random fluctuations in the measurements. To improve the solving precision, a data-processing method based on the least-squares technique is proposed to fit the data for approximate solutions. Verification experiments using the multicolor pyrometry were conducted in a 54–120 kW test furnace with diesel fuel. Data for 16 wavelengths detected by a fiber optic spectrometer from a diesel flame is analyzed to determine how to choose a suitable combination of three wavelengths for three-color pyrometry. The CCD-based three-color measurements, which would be much more practical in field measurements, are compared with the spectrometer-based results.
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e-mail: trfu@mail.tsinghua.edu.cn
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Research Papers
Temperature Measurements of Diesel Fuel Combustion With Multicolor Pyrometry
Tairan Fu,
Tairan Fu
Department of Thermal Engineering, Key Laboratory for Thermal Science and Power Engineering of Ministry of Education,
e-mail: trfu@mail.tsinghua.edu.cn
Tsinghua University
, Beijing 100084, P. R. China
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Zhe Wang,
Zhe Wang
Department of Thermal Engineering, State Key Laboratory of Power Systems,
Tsinghua University
, Beijing 100084, P. R. China
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Xiaofang Cheng
Xiaofang Cheng
Department of Thermal Science and Energy Engineering,
University of Science and Technology of China
, Hefei 230026, P. R. China
Search for other works by this author on:
Tairan Fu
Department of Thermal Engineering, Key Laboratory for Thermal Science and Power Engineering of Ministry of Education,
Tsinghua University
, Beijing 100084, P. R. Chinae-mail: trfu@mail.tsinghua.edu.cn
Zhe Wang
Department of Thermal Engineering, State Key Laboratory of Power Systems,
Tsinghua University
, Beijing 100084, P. R. China
Xiaofang Cheng
Department of Thermal Science and Energy Engineering,
University of Science and Technology of China
, Hefei 230026, P. R. ChinaJ. Heat Transfer. May 2010, 132(5): 051602 (7 pages)
Published Online: March 9, 2010
Article history
Received:
May 20, 2009
Revised:
August 27, 2009
Online:
March 9, 2010
Published:
March 9, 2010
Citation
Fu, T., Wang, Z., and Cheng, X. (March 9, 2010). "Temperature Measurements of Diesel Fuel Combustion With Multicolor Pyrometry." ASME. J. Heat Transfer. May 2010; 132(5): 051602. https://doi.org/10.1115/1.4000467
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