电弧风洞喷管壁温对平板试验的影响研究  

Influence of nozzle wall temperature on plate test in arc-heated wind tunnel

作　　者：隆永胜[1] 袁竭[1] 赵顺洪 杨斌[1] 朱新新[1] LONG Yongsheng;YUAN Jie;ZHAO Shunhong;YANG Bin;ZHU Xinxin(Hypervelocity Aerodynamics Institute,China Aerodynamics Research and Development Center,Mianyang 621000,China)

机构地区：[1]中国空气动力研究与发展中心超高速空气动力研究所,绵阳621000

出　　处：《实验流体力学》2022年第6期47-53,共7页Journal of Experiments in Fluid Mechanics

摘　　要：为研究电弧风洞喷管壁面温度对平板试验的影响,研制了隔热半椭圆喷管,采用电弧风洞半椭圆喷管平板试验的方法,将喷管长轴边与平板试验模型连接,使气流延伸到模型表面进行试验。喷管扩张段水冷壁面在试验初始时期(冷壁)和壁温上升(热壁)条件下,试验研究了平板测试模型表面冷壁热流和平衡温度的变化。结果表明:在喷管来流焓值1.00~2.55 MJ/kg范围内,相对于冷壁,热壁模型表面冷壁热流增加4.7%~15.0%,平衡温度最大升高4.24%。因此,热防护试验时应考虑喷管壁面温度对平板试验结果带来的影响,需要提高来流焓值。In order to study the influence of the nozzle’s wall temperature on the plate test in the arc-heated wind tunnel,a thermal insulation semi-elliptical nozzle was designed.A plate test was adopted in the arc-heated wind tunnel with the semi-elliptical nozzle.The bottom of the nozzle wall was connected with the plate model.The flow extended to the surface of the model during the test.The surface heat flux and equilibrium temperature of the model under the conditions of the hot nozzle wall and the cold nozzle wall were measured and analyzed,respectively.The results show that the enthalpy of the nozzle ranged from 1.00 MJ/kg to2.55 MJ/kg.Compared with the condition of the cold nozzle wall,the surface heat flux of the hot nozzle wall increased by 4.7%to 15.0%,and the equilibrium temperature increased by up to4.24%.In the thermal protection test,the influence of the nozzle wall temperature on the results of the plate test should be considered,and it is necessary to increase the enthalpy of the flow.

关 键 词：电弧风洞 热流 焓值 边界层 

分 类 号：V211.744[航空宇航科学与技术—航空宇航推进理论与工程]