基于数字孪生的热密封材料气密及传热特性高温测试技术  

High temperature testing technology for airtightness and heat transfercharacteristics of heat sealing materials based on digital twin

作　　者：陈立芳[1,2] 周宇航 房务官 郭仪翔 CHEN Lifang;ZHOU Yuhang;FANG Wuguan;GUO Yixiang(Key Laboratory of Engine Health Monitoring-Control and Networking of Ministry of Education,Beijing University of Chemical Technology,Beijing 100029,China;State Key Laboratory of High-End Compressor and System Technology,Beijing University of Chemical Technology,Beijing 100029,China;Beijing Aerospace Technology Research Institute,Beijing 100074,China)

机构地区：[1]北京化工大学发动机健康监控及网络化教育部重点实验室,北京100029 [2]北京化工大学高端压缩机及系统技术全国重点实验室,北京100029 [3]北京空天技术研究所,北京100074

出　　处：《纺织学报》2025年第3期188-195,共8页Journal of Textile Research

基　　金：国家自然科学基金项目(52375077);国防基础科研计划项目(JCKY2019204B044)。

摘　　要：飞行器在高超声速飞行和再入过程中存在热侵蚀的安全隐患,高温高压苛刻环境对热密封材料要求越来越高,针对苛刻环境下飞行器用热密封材料特性评估难的问题,提出一种基于数字孪生的热密封材料气密及传热特性高温测试技术,并搭建虚拟和实体测试系统完成陶瓷纤维毡在不同工况下的气密及传热特性测试。测试前通过虚拟空间开展热密封环境模拟仿真,测试中通过数据在虚实空间的动态交互实现测试过程的监测预警,测试后运行数字孪生系统对测试结果进行评估,并基于孪生模型对超出测试范围的参数完成虚拟测试。实验结果表明:陶瓷纤维毡在30%压缩率、1100℃高温时的泄漏率相较于常温工况约减少了72%,该研究解决了超高参数下热密封材料无法测试的难题。Objective Thermal sealing research is crucial in the development of spacecraft technology.During the hypersonic flight and re-entry process of spacecraft,the surface is subjected to aerodynamic heating caused by high-speed airflow,which poses a safety hazard of thermal erosion.The high temperature and high pressure harsh environment requires increasingly high requirements for thermal sealing materials.The simulation and testing technology research is an effort to investigate the flow resistance and thermal resistance characteristics of thermal sealing materials for spacecrafts.Method A high temperature testing technology of braided heat seal based on digital twin was proposed,and a virtual and physical testing system was constructed to test the air tightness and heat transfer characteristics of heat seal materials under different working conditions.The thermal sealing environment was simulated before the test,and the testing process data were monitored during the test.After the test,the digital twin system is operated to evaluate the test results,and the virtual test of parameters beyond the test scope is completed based on the twin model.Results The performance testing of thermal sealing materials obtained key parameters such as temperature,pressure,and leakage rate under given working conditions,as well as their variation patterns.Under the same compression rate,the leakage rate of the tested ceramic fiber felt showed an increase with the increase of pressure difference,showing that the smaller the compression rate,the faster the increase rate.Under the same pressure difference,it was found that the larger the compression ratio,the smaller the leakage rate.At a compression rate of 30%,the leakage rate of ceramic fiber felt decreased by about 43%compared to normal temperature conditions at 500℃,and the temperature difference between the front and rear sections of the sample was about 43℃.At 1100℃,the leakage rate decreased by about 72%compared to normal temperature conditions,and the temperature difference

关 键 词：再入飞行器 数字孪生 热密封材料 气密特性 传热特性 高温测试技术 

分 类 号：V45[一般工业技术—材料科学与工程]