Tunable Diode Laser Absorption Spectroscopy (TOLAS) Technique for Velocity Measurements of High-speed Combustion Gas

摘要：

The velocity information of the high-speed combustion gas is very important for understanding the flow process in propulsion system. Due to the harsh environment, conventional intrusive measurement techniques become unreliable. Tunable Diode Laser Absorption Spectroscopy (TDLAS) technique has more advantages of non-intrusive, fast response and simultaneous for in-situ measurements of multiple parameters in gas dynamic and combustion flows. In this paper, the two-crossed-beams TDLAS system has designed to obtain the H2O absorption spectrum near 7185. 597cm-1 of high-speed combustion gas. The gas velocity is deduced from the measured Doppler-shift absorption of two beams. In order to verify the technique, the velocity of standard high speed flow which has known velocity is measured by TDLAS system. Comparing with standard calculated values, the errors of the measurements are within 10％. Moreover, the TDLAS system has also been demonstrated to measure the velocity of exhaust gas in Rocket-Based Combined Cycle (RBCC) engine.

关键词： measurement technique velocity TDLAS RBCC

作者: YANG Bin HE Guo-qiang LIU Pei-jin QI Zong-man

作者单位: National Key Laboratory of Combustion, Flow and Thermo-Structure, Northwestern Polytechnical University, Xian, China

会议类型: 国际会议

会议名称: 4th International Symposium on Jet Propulsion and Power Engineering(第四届喷气推进与动力工程国际会议 ISJPPE2012)

会议地点: 西安

会议语种:英文

页码: 395-398

在线出版日期: 2012-09-10（万方平台首次上网日期，不代表论文的发表时间）