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在航空发动机燃烧室的研发过程中,传统的测量手段往往有时无法实施或不能满足精确捕捉流场信息的要求,发展新型、高精度测量以及先进诊断技术势在必行。重点介绍了适用于航空发动机燃烧室测量的先进激光测试技术,并与传统测量方法进行了比较。发动机燃烧室内的流场测量包括速度测量、温度和组分质量分数测量。氢氧根离子标记测速(HTV)方法适用于有化学反应流场的速度测量;而拉曼散射测量技术可以同时测量多种组分的质量分数和温度。利用这些激光测量技术的特点,可以使其在燃烧室的点火、贫油熄火及排放等性能的研究中发挥重要作用。
In the process of developing aeroengine combustor, the traditional measurement methods are often unable to meet the requirements of accurately capture the flow field information, and it is imperative to develop new type, high precision measurement and advanced diagnostic techniques. The advanced laser testing technique suitable for the measurement of aeroengine combustor is introduced and compared with the traditional measuring methods. Flow field measurements in the engine combustion chamber include velocity measurements, temperature and mass fraction measurements. The hydroxide ion-labeled velocity (HTV) method is suitable for velocity measurement with a chemical reaction flow field; Raman scattering measurement technology can simultaneously measure the mass fraction and temperature of various components. The use of these laser measurement techniques can make them play an important role in the research of ignition, lean burnout and emission of combustion chambers.