Experimental research on flame spectra of methane-coal dust explosions |
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| Authors: | Li Hongde Liu Yuzheng Liao Jiqing Xia Zizhu Li Shizhan |
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| Affiliation: | (1) Institute of Mechanics, Chinese Academy of Sciences, Beijing, China;(2) Chongqing Institute, Coal Academy of Sciences, Chongqing, China |
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| Abstract: | The significance of experimental research on flame spectra of methane-coal dust explosions is explained. Weak explosions of methane-coal dust-air mixtures were carried out in a large-scale tube of Ø 200 cm×2900cm with one end open, and the absolute radiation intensities as well as their variation under different conditions for characteristic wavelengths of 0.8875, 1.000, 1.505, 2.801, and 4.346μm were obtained by using small angle of view and a multichannel detector developed by us. The experimental results are discussed and compared with those published abroad. Based on the absolute radiation intensity measured at wavelength 4.346μm and the selected blackbody radiation model, the temperature of explosion flame was determined. The results obtained are not only of great practical importance to the industry but may also be used in the study of flame and chemical kinetics. |
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| Keywords: | methane-coal dust explosion isolation multichannel spectral detector characteristic spectra spectral radiation intensity flame temperature |
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