非稳态环境下塞式热流传感器的仿真与分析

非稳态热流密度是战斗部热毁伤威力评估的重要参数.针对爆炸场非稳态测试环境恶劣、气体高速流动、温度变化迅速的问题,对塞式热流传感器的组成材料、热敏元件等进行了重新选择.根据塞式热流传感器的组成结构和测量原理进行了理论推导,得到了塞式热流传感器测量热量的数学模型.针对非稳态爆炸场环境特点,对塞式热流传感器的热敏元件进行了爆...

Plug-type Heat Flow Sensor in Unstable Environment Simulation and Analysis

Unsteady heat flux measurement is an important research content in industry, aerospace and other fields. In order to solve the problems of bad unsteady test environment, high-speed gas flow and rapid temperature change in explosion field, the composition materials and thermal elements of plug heat flow sensor were reselected. According to the structure and measurement principle of plug heat flow sensor, the mathematical model of heat measurement by plug heat flow sensor was obtained. According to the environmental characteristics of unsteady explosion field, the thermal element of plug heat flow sensor was simulated under explosion shock wave, and the parameters of thermal element resisting pressure shock were obtained. Then the thermodynamic simulation of unsteady heat flow was carried out, and the temperature rise curve of thermal element was obtained. Finally, the thickness and diameter of thermal element were determined. The simulation results show that the range of the plug heat flow sensor is 0~9.6 mw·m-2, the response time is 70 ms, and the measurement error is 3.1%. To some extent, the results can meet the requirements of heat flux measurement in explosion field.