Numerical Simulation Research on Thermal Response Characteristics of E-type Coaxial Thermocouples | |
Qi L(齐力)1,2; Han GL(韩桂来)1,2; Jiang ZL(姜宗林)1,2 | |
会议录名称 | 2021 2rd International Conference on Applied Mechanics and Mechanical Engineering |
2021-08-12 | |
会议名称 | 2021 2rd International Conference on Applied Mechanics and Mechanical Engineering |
会议日期 | 2021/09/12 |
会议地点 | 长沙 |
摘要 | When flying at hypersonic speeds, the aircraft will face the effect of high temperature gas, and it is of great significance to accurately measure the surface heat flux. For millisecond-level pneumatic heating processes, the commonly used devices for measuring heat flux include coaxial thermocouples and thin film resistance meters. The surface junction coaxial thermocouples have the characteristics of simple structure, strong anti-erosion ability and high measurement accuracy. Coaxial thermocouples have been widely used in transient heat flux measurement in shock wind tunnels. According to the research results of domestic and foreign scholars, the measurement accuracy and response time of the E-type coaxial thermocouple is better than other coaxial thermocouples. This paper studies the thermal response characteristics of the E-type coaxial thermocouple within 100 under a uniform heat flux load through numerical simulation. Through numerical simulation, we explain the temperature and heat flux difference between the measurement and the one-dimensional semi-infinite body heat conduction theory. The internal heat transfer law of the coaxial thermocouple and the lateral heat transfer with the wall material are described. And the influences of different thickness of insulation and different wall material on the heat flux measurement are studied, then suggestions for the structure design of the E-type coaxial thermocouple are put forward. |
关键词 | 气动热 同轴热电偶 数值模拟 |
收录类别 | EI |
语种 | 英语 |
文献类型 | 会议论文 |
条目标识符 | http://dspace.imech.ac.cn/handle/311007/89148 |
专题 | 高温气体动力学国家重点实验室 |
通讯作者 | Qi L(齐力) |
作者单位 | 1.中国科学院力学研究所 2.中国科学院大学 |
推荐引用方式 GB/T 7714 | Qi L,Han GL,Jiang ZL. Numerical Simulation Research on Thermal Response Characteristics of E-type Coaxial Thermocouples[C]2021 2rd International Conference on Applied Mechanics and Mechanical Engineering,2021. |
条目包含的文件 | 条目无相关文件。 |
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。
修改评论