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The study of gas spectrum characteristics at high pressure is the foundation for tunable diode absorption spectroscopy technique used in pulsed detonation engines and other high-pressure combustion environments. To understand variations of gas spectrum characteristics with pressure, especially the absorption spectrum characteristics at high pressures, gas absorption spectrum characteristics at high pressure are studied by tunable diode laser absorption spectroscopy in this paper, a method to calculate gas concentration at high pressure is also presented. Within a pressure range of 1-10.13×105 Pa, CO2 absorption spectrum in a near-infrared band of 1.58 μm is simulated. Gas online measurement at high pressure is set up. The CO2 absorption spectrum is measured by a direct absorption method near 1578.0-1579.7 nm. The concentration at high-pressure environment is calculated by linear fitting method and compared with theoretical absorption spectrum. The results show that the absorption spectrum obtained experimentally is in good agreement with simulations result. In high-pressure environment, maximum error of linear fitting method to calculate gas concentration at high pressure is 5.5%, and the average error is 2.6%.
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Keywords:
- absorption spectrum /
- high pressure /
- gas online measurement /
- linear fitting
[1] Hanson R K 2011 Proceedings of the 33th Combustion Institute Beijing, China, August 2-6, 2010 p1
[2] Li H, Farooq A, Jeffries J B, Hanson R K 2007 Appl. Phys. B 89 407
[3] Farooq A, Jeffries J B, Hanson R K 2008 Appl. Phys. B 90 619
[4] Wang J, Sanders S T, Jeffries J B, Hanson R K 2001 Appl. Phys. B 72 865
[5] Ma W G, Yin W B, Huang T, Zhao Y T, Li C Y, Jia S T 2004 Spectroscopy and Spectral Analysis 24 135 (in Chinese) [马维光, 尹王保, 黄涛, 赵延霆, 李昌勇, 贾锁堂 2004 光谱学与光谱分析 24 135]
[6] Li N, Yan J H, Wang F, Chi Y, Cen K F 2008 Spectroscopy and Spectral Analysis 28 1708 (in Chinese) [李宁, 严建华, 王飞, 池涌, 岑可法 2008 光谱学与光谱分析 28 1708]
[7] Leyen S C 2011 Ph. D. Dissertation (Stanford: Stanford University)
[8] Zhou X, Jeffries J B, Hanson R K 2005 Appl. Phys. B 81 711
[9] Li N, Wang F, Yan J H, Ma Z Y, Cen K F 2005 Proceedings of the CSEE 25 122 (in Chinese) [李宁, 王飞, 严建华, 马增益, 岑可法 2005 中国电机工程学报 25 122]
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[1] Hanson R K 2011 Proceedings of the 33th Combustion Institute Beijing, China, August 2-6, 2010 p1
[2] Li H, Farooq A, Jeffries J B, Hanson R K 2007 Appl. Phys. B 89 407
[3] Farooq A, Jeffries J B, Hanson R K 2008 Appl. Phys. B 90 619
[4] Wang J, Sanders S T, Jeffries J B, Hanson R K 2001 Appl. Phys. B 72 865
[5] Ma W G, Yin W B, Huang T, Zhao Y T, Li C Y, Jia S T 2004 Spectroscopy and Spectral Analysis 24 135 (in Chinese) [马维光, 尹王保, 黄涛, 赵延霆, 李昌勇, 贾锁堂 2004 光谱学与光谱分析 24 135]
[6] Li N, Yan J H, Wang F, Chi Y, Cen K F 2008 Spectroscopy and Spectral Analysis 28 1708 (in Chinese) [李宁, 严建华, 王飞, 池涌, 岑可法 2008 光谱学与光谱分析 28 1708]
[7] Leyen S C 2011 Ph. D. Dissertation (Stanford: Stanford University)
[8] Zhou X, Jeffries J B, Hanson R K 2005 Appl. Phys. B 81 711
[9] Li N, Wang F, Yan J H, Ma Z Y, Cen K F 2005 Proceedings of the CSEE 25 122 (in Chinese) [李宁, 王飞, 严建华, 马增益, 岑可法 2005 中国电机工程学报 25 122]
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