基于微粒示踪的燃烧尾喷流速场测量方法研究  

Research on measurement method of velocity field for combustion exhaust plume based on particle tracing

作　　者：饶剑 马国鹭[1] 宋子军 赵涌 赵登峰[1] 何林 RAO Jian;MA Guolu;SONG Zijun;ZHAO Yong;ZHAO Dengfeng;HE Lin(Ministry of Education Key Laboratory of Testing Technology for Manufacturing Process,Southwest University of Science and Technology,Mianyang 621010,China;Key Laboratory on Aero-engine Altitude Simulation Technology AECC Sichuan Gas Turbine Establishment,Mianyang 621010,China)

机构地区：[1]西南科技大学制造过程测试技术教育部重点实验室,四川绵阳621010 [2]中国航发四川燃气涡轮研究院航空发动机高空模拟技术重点实验室,四川绵阳621000

出　　处：《光学技术》2021年第5期577-581,共5页Optical Technique

基　　金：国家自然科学基金(61505169);航空发动机尾喷流中颗粒物参数检测关键技术研究(20zh0074)。

摘　　要：针对高温高速尾喷流场速度的快速准确测量问题,提出了一种基于微粒示踪的燃烧尾喷流速场测量方法。通过主动向尾喷流中添加具有灰体辐射特性的金属微粒,采用合适的观测参数对其进行高速成像,结合灰度分布互相关评估微粒图像的最大互相关度,从而获得流场速度。利用同轴射流火焰系统对测量方法开展了流速测试研究。结果表明,射流速度90~140m·s^(-1)内测量值与一维理论值相对偏差不超过5%,微粒吹送速度0.02~0.1m·s^(-1)下流速测量值相对偏差低于0.35%,验证了所提方法适用于类似航空发动机试车尾喷流场速度测量的应用场景。In order to measure the velocity field of high-heat and high-speed jet flow quickly and accurately,a measurement method of velocity field for combustion exhaust plume based on particle tracing is proposed.By actively adding metal particles with gray body radiation characteristics to the exhaust plume,high-speed imaging is carried out by adopting appropriate observation parameters,and the maximum cross-correlation degree of particle images is evaluated by combining gray distribution cross-correlation,so as to obtain the velocity of flow field.The coaxial jet flame system is applied to the experimental research of the velocity measurement.The results show that the relative deviation between the measured value and the one-dimensional theoretical value at flow velocity of 90~140 m·s^(-1) is less than 5%,and the relative deviation of flow velocity measured at particle blowing speed of 0.02~0.1 m·s^(-1) is less than 0.35%.It is verified that the method is suitable for similar application scenarios of velocity field measurement for exhaust plume in aero-engine test.

关 键 词：光学测量 燃烧尾喷流 高速成像 微粒示踪 速度场测量 图像处理 

分 类 号：TB872[一般工业技术—摄影技术] TP391[自动化与计算机技术—计算机应用技术]