塞块式量热计长时间变工况热流测量  

Investigation of Slug Calorimeter for Measuring Multi Invariable Heat Flux Environment

作　　者：李文浩 赵玲 田宁[1] 邹样辉[1] LI Wen-Hao;ZHAO Ling;TIAN Ning;ZOU Yang-Hui(Beijing Institute of Space Long March Vehicle,Beijing 100076,China)

机构地区：[1]北京航天长征飞行器研究所,北京100076

出　　处：《工程热物理学报》2021年第8期2132-2140,共9页Journal of Engineering Thermophysics

摘　　要：采用塞块式量热计对200 MW燃气流风洞试验件表面热流进行测量,试验过程中塞块式量热计遍历风洞的启动、模型变攻角、停车等阶段。为准确获取不同攻角条件下模型表面热流值,采用数值仿真对塞块式量热计的传热特性进行分析,研究背温反算的热流值与输入热流边界条件的差异,提出塞块式量热计长时间使用的修正方法,该修正方法通过一次稳态热流源的标定即可获得其他热流边界条件下的结果,从而简化标定过程。将修正方法应用于长时间变工况热流测量修正时,偏差小于2%,增加了塞块式量热计的使用范围,通过一次风洞试验,获取多个稳态工况条件下试验件表面热流值,节约风洞运行成本。此外,该修正方法也可用于高热流瞬时测量结果的修正。Slug calorimeters are used for characterization of thermal environment at 200 MW combustion gas wind tunnel.The test article inserted with slug calorimeter experiences multi invariable heat flux environment during the test.In order to analyze the difference between the heat flux calculated from the back-face temperature and the incident heat flux,Finite Element Analysis(FEA)models are created using the commercial software,where conduction heat losses and the variable heat flux boundary condition are simulated.The heat flux calculated will be nearly same in conditions of equal back-face temperature and heat flux boundary condition.The conclusion is confirmed by the experiments.

关 键 词：塞块式量热计 热流 热环境测试 200 MW燃气流风洞 

分 类 号：V211.7[航空宇航科学与技术—航空宇航推进理论与工程]