基于TDLAS的脉冲爆震发动机燃气温度测量  

Temperature Measurement of Burning Gas in Pulse Detonation Engine Based on TDLAS

作　　者：吴昭 李江帆 卢杰[2] 杨斌[1] 郑龙席[2] Wu Zhao;Li Jiangfan;Lu Jie;Yang Bin;Zheng Longxi(Shanghai Key Laboratory of Multiphase Flow and Heat Transfer in Power Engineering,School of Energy and Power Engineering,University of Shanghai for Science and Technology,Shanghai 200093,China;School of Power and Energy,Northwestern Polytechnical University,Xi'an 710072,China)

机构地区：[1]上海理工大学能源与动力工程学院,上海市动力工程多相流动与传热重点实验室,上海200093 [2]西北工业大学动力与能源学院,西安710072

出　　处：《燃烧科学与技术》2024年第4期411-418,共8页Journal of Combustion Science and Technology

摘　　要：针对脉冲爆震发动机(pulse detonation engine,PDE)燃气温度参数在线测量,基于可调谐半导体激光器吸收光谱(tunable diode laser absorption spectroscopy,TDLAS)技术,采用扫描波长直接吸收-时分复用策略,以H_(2)O分子为目标组分,设计了燃气温度测量系统,并将该系统应用于PDE燃气温度测量,获得了PDE燃气H_(2)O分子(7 444.352+7 444.371)-(7 185.587+7 185.597)cm^(-1)谱线对吸收光谱,并基于双线测温原理实现了5 Hz、10 Hz、15 Hz、20 Hz、25 Hz、30 Hz工作频率燃气温度的在线测量,详细讨论了PDE在不同工作频率下的燃气温度测量结果.结果表明:基于TDLAS技术可以实现PDE燃气温度在线测量.PDE在5 Hz工作频率时,爆震波燃气峰值温度为1 868 K,爆震波通过后,燃气温度存在618 K和424 K两个台阶;不同工作频率下,PDE的燃气温度变化规律较为相似,但随着工作频率的提高,燃气温度升高,这为PDE燃烧优化以及性能评估提供数据支撑.Aiming at the online temperature measurement of the burning gas in pulse detonation engine(PDE),based on tunable diode laser absorption spectroscopy(TDLAS),the scanning wavelength direct absorption-time division multiplexing strategy is adopted,and H2O molecule is used as the target component.The burning gas temperature measurement system was designed and applied to the burning gas temperature measurement of PDE.The H2O molecule absorption spectra of(7444.352+7444.371)-(7185.587+7185.597)cm^(-1) spectral line pair of burning gas in PDE were obtained,and the online temperature measurement of the burning gas in PDE under 5 Hz,10 Hz,15 Hz,20 Hz,25 Hz,30 Hz working frequency was realized based on the two-line temperature measurement principle.The temperature measurements in PDE under different operating frequencies were discussed in detail.It shows that the online temperature measurement of burning gas in PDE can be realized based on TDLAS.The peak temperature of the detonation wave gas in PDE under 5 Hz working frequency is 1868K,and there are two distribution steps of 618 K and 424K after the detonation wave passed.The temperature variation regularity of PDE under different operating frequencies is similar,but with the increase of operating frequency,the temperature of the burning gas increases.It provides data support for the combustion optimization and perform-ance evaluation of PDE.

关 键 词：脉冲爆震发动机 燃烧诊断 可调谐半导体激光器吸收光谱 燃气温度 时分复用 

分 类 号：V231.22[航空宇航科学与技术—航空宇航推进理论与工程]