高热流密度传热试验台设计

针对工程领域高热流密度传热问题实机试验复杂、数值仿真又难以确定准确边界的现状。设计了一种模拟试验台,在简单试件的两侧进行加热和冷却,形成高热流密度,在此基础上进行测试和控制。试件采用多种固定方式固定于试验支架,模拟实际力学约束条件。加热侧采用感应加热系统,冷却侧采用射流冲击冷却系统。数据采集和控制系统由NI硬件及其软件平台构建,应用cRIO嵌入式实时控制器及其相应的采集卡和输出卡,实现多种测量、记录和反馈报警。经试验验证,该试验台可以使试件达到1MW/m2的平均热流密度,可用于承受高热流密度热负荷作用的试件和材料的传热规律研究及其热疲劳可靠性研究。

Design of High-heat-flux Heat Transfer Test Bench

For the problem of high-heat-flux heat transfer in the engineering field,it was difficult to solve the real experiment and numerical simulation because its experiment was complex and the accurate boundary could not be determined in the simulation either.For the status,a simulation test bed was designed,the high heat flux was realized by heating and cooling on both sides of test specimen and the measurement and control were also carried out.The specimen was fixed in the test stand with different ways,which simulated the actual mechanical constraints.The heating and cooling were separately realized by the induction heating and the jet impingement cooling system.The acquisition and control system were built by NI hardware and software platform.Many kinds of measurement,logging and alarm feedback were realized with CRIO embedded real-time controller and corresponding acquisition and output board.By the experimental verification,the test bed could make the specimen reach heat flux of 1 MW/m2 in average,and hence could be applied to research the heat transfer law and fatigue reliability of specimen and material in high heat flux.