摘要
防热瓦是高超声速飞行器应用最广泛的隔热材料,对其进行了热控性能数值分析,并就防热瓦参数变化对各部件表面最高温度变化的影响进行了研究。结果表明,防热瓦最高温度及其出现时刻由外部热流峰值及其时刻决定,增加防热瓦比热容、厚度、密度、涂层发射率及降低防热瓦热导率均可有效降低应变隔离垫和机体的最高温度,提高系统的防热性能。增加涂层发射率可降低防热瓦的最高温度,其他参数变化对防热瓦最高温度的影响可以忽略。
The ceramic tile is the most widely used thermal insulation material for hypersonic vehicles.This paper conducts its thermal control performance analysis and parameter study.The results show that the maximum temperature and corresponding time of the ceramic tile are determined by the external peak heat flux and corresponding time.Increasing the specific heat,thickness,density,emissivity of coating and decreasing the thermal conductivity of the tile can effectively reduce the maximum temperature of the strain-isolation-pad and the structure and improve the thermal protection performance of the system.Increasing the emissivity of coating can also reduce the maximum temperature of the tile,but the other design parameters have little influence on the maximum temperature of the tile.
作者
施剑玮
黄杰
高代阳
Shi Jianwei;Huang Jie;Gao Daiyang(Shanghai Aircraft Design and Research Institute,Shanghai,201210,China;State Key Laboratory of Mechanics and Control of Mechanical Structures,Nanjing University of Aeronautics and Astronautics,Jiangsu Nanjing,210016,China;Key Laboratory of Fundamental Science for National Defense-Advanced Design Technology of Flight Vehicle,Nanjing University of Aeronautics and Astronautics,Jiangsu Nanjing,210016,China)
出处
《机械设计与制造工程》
2020年第4期76-80,共5页
Machine Design and Manufacturing Engineering
基金
博士后创新人才支持计划(BX20190152)
中国博士后科学基金资助项目(2019M660118)
江苏省博士后科研资助计划项目(2019K127)
江苏高校优势学科建设工程资助项目。
关键词
陶瓷防热瓦
热控性能
参数研究
最高温度
ceramic tile
thermal control performance
parameter study
maximum temperature
