摘要
为给未来高推质比航空发动机燃烧室出口温度分布测试作技术储备,以某单管燃烧室为研究对象,采用可调谐半导体激光吸收层析成像(TDLAT)技术,在0.5~0.8 MPa压力环境下,研究了基于波长调制(WMS)技术的燃烧室出口温度分布测试方法的工程适用性。结果表明:通过多光路正交测量的方式,利用扣除背景的归一化波长调制光谱模型、变量轮换迭代反演及计算层析(CT)技术,可以实现具有时空分辨性的燃烧室出口温度分布式测量;场分布重建结果能够较正确地反映出燃气温度和H_(2)O气体积分数随进口参数变化的趋势与特征;受燃烧流场的不均匀性、光谱模型建立与光谱参数标定的不准确、反演与重建算法的不完善等因素的影响,TDLAS测温均值低于热电偶测量结果,相对误差在15%~23%之间,测量数据的准确度距工程应用需求还有一定的差距。
In order to make technical reserves for measurement of combustor outlet temperature profile of high thrust-weight ratio aero-engine in future,the computed tomography technology of tunable diode laser absorption tomography(TDLAT) technology was applied,and the engineering adaptability of measurement method based on wavelength modulation spectroscopy(WMS) technology was studied in a single can combustor under the pressure of 0.5-0.8 MPa condition. The results showed that the measurement of combustor outlet temperature profile could be achieved with time and spatial resolution applying the grid method of orthogonal intersection of multiple light path,using the normalized WMS model whose background was subtracted,the iterative inversion method of variables and the computed tomography(CT) technology;the trends and characteristics of gas temperature and H2O concentration distribution vs. the changes of inlet parameters could be better shown from the reconstruction results;the mean value of TDLAS temperature measurement were lower than that of thermocouple measurement, and the relative error was between 15% and 23%, which was ascribed to the non-uniform flow field, the inaccuracy of spectral model and spectrum parameter calibration,and the imperfections of inversion and reconstruction algorithm,etc, there was still a certain gap between the accuracy of measurement data and the requirements of engineering application.
作者
刘重阳
许振宇
黄安
宋文艳
LIU Chongyang;XU Zhenyu;HUANG An;SONG Wenyan(School of Power and Energy,Northwestern Polytechnical University,Xi’an 710072,China;Sichuan Gas Turbine Establishment,Aero Engine Corporation of China,Mianyang Sichuan 621300,China;Key Laboratory of Environmental Optics and Technology,Anhui Institute of Optics and Fine Mechanics,Chinese Academy of Sciences,Hefei 230031,China)
出处
《航空动力学报》
EI
CAS
CSCD
北大核心
2023年第1期116-126,共11页
Journal of Aerospace Power
基金
四川省科技计划项目(2018JY0432)。
关键词
吸收光谱
波长调制技术
燃烧室
出口温度分布
重建
absorption spectroscopy
wavelength modulation spectroscopy technology
combustor
outlet temperature profile
reconstruction
作者简介
刘重阳(1980−),男,博士生,主要从事航空发动机燃烧室试验测试技术研究。
