高焓加热实验壁面催化效应分析  

Analysis of surface recombination effect in arc-jet aero-heating test

作　　者：苗文博[1] 史可天[1] 欧东斌[1] 曹占伟 艾邦成[1] Miao Wenbo;Shi Ketian;Ou Dongbin;Cao Zhanwei;Ai Bangcheng(China Academy of Aerospace Aerodynamics,Beijing 100074,China;Science and Technology on Space Physics Laboratory,China Academy of Launch Vehicle Technology,Beijing 100076,China)

机构地区：[1]中国航天空气动力技术研究院,北京100074 [2]中国运载火箭技术研究院空间物理重点实验室,北京100076

出　　处：《实验流体力学》2019年第3期20-24,共5页Journal of Experiments in Fluid Mechanics

摘　　要：高焓地面加热实验中存在显著的壁面催化复合现象。热防护材料催化性能较低时,如果进行状态标定时不考虑壁面催化效应,将导致地面加热考核实验欠考核。基于平板加热实验,通过结构传热分析与地面实验数据对比,发展了高焓加热实验壁面催化效应分析方法。该方法可以评估加热实验状态典型热防护材料催化效应,从而为地面实验方案改进和完善提供技术支撑。通过分析发现,对于某热防护材料,催化效应使得真实受热仅为标定热流的85%左右,在采用铜制塞式热流传感器进行热流标定时,需要考虑催化效应加严考核条件,才能保证有效考核。There exists evident surface recombination of atoms in the high enthalpy aero-heating test. When the catalysis of TPM (Thermal Protection Material) is low, the calibration of aero-heating should consider surface recombination;otherwise it would cause under-estimation of TPM. Based on the flat aero-heating test, the analysis method of surface recombination effects in the arc-jet flow was developed by comparison of the structure heat transfer simulation and test data. This method can evaluate surface recombination effects on special TPM in arc-jet tests, and give support on modification and improvement of test projects. The analysis results show that, for a kind of TPM, the surface recombination effect makes the real aero-heating to be only about 85 percent of the calibrated heat flux. Therefore, the surface recombination effect should be considered when the copper sensor is used to calibrate the aero-heating, and the flow condition should be enhanced to ensure effective assessment.

关 键 词：高焓加热 地面实验 催化效应 热考核 

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]