中国激光, 2018, 45 (4): 0406002, 网络出版: 2018-04-13  

基于光纤光栅的真空环境不锈钢热传递研究 下载: 622次

Thermal Transmission of Stainless Steel Under Vacuum Condition Based on Fiber Bragg Grating
作者单位
合肥工业大学仪器科学与光电工程学院, 安徽 合肥 230009
摘要
搭建真空环境光纤光栅温度场测量系统, 以托卡马克装置中真空室内部支撑的部分结构为原型, 构建304不锈钢平台作为研究对象, 进行常压和真空环境下的稳态热分析。利用铝合金加热板对常压和真空环境下的不锈钢平台施加热载荷, 基于微型化管式封装的光纤光栅温度传感器对测点处温度进行监测。实验结果显示, 真空环境下热稳态时各测点温度高于常压环境下对应的值, 真空环境下不锈钢平台达到热稳态约耗时4900 s, 而常压环境下耗时约为6150 s。真空和常压环境下均存在热传导和热辐射方式的热量传递。常压环境下不锈钢平台因与空气接触, 主要产生热对流形式的热量耗散。因此, 不锈钢平台在真空环境下热量损耗少, 传热效率高于常压环境。
Abstract
A measurement system of temperature field under vacuum condition is established based on fiber Bragg grating (FBG). A 304 stainless steel frame, which is similar to the support structure of the vacuum chamber in Tokamak devices, is used as the research object to conduct steady-state thermal analysis under both vacuum and normal pressure conditions. Specifically, an aluminum alloy heating plate is adopted to heat the stainless steel frame under either vacuum and normal pressure conditions. As packaged with micro steel capillary, four FBG temperature sensors are placed into measurement points to detect temperature. The experimental results show that the temperatures of four measurement points under vacuum condition are higher than those under normal pressure condition. Meanwhile, the temperature of four measurement points reach stability costs 4900 s and 6150 s, respectively, under vacuum and normal pressure conditions. It is shown that heat transmits by the way of both thermal conduction and thermal radiation under vacuum and normal pressure conditions. As the stainless steel frame contacts with air under normal pressure condition, which leads to thermal losses via thermal convection, the heat loss of stainless steel frame is smaller, and the heat transmission efficiency is higher under vacuum condition.

郑嘉麒, 余有龙, 靳夏文. 基于光纤光栅的真空环境不锈钢热传递研究[J]. 中国激光, 2018, 45(4): 0406002. Zheng Jiaqi, Yu Youlong, Jin Xiawen. Thermal Transmission of Stainless Steel Under Vacuum Condition Based on Fiber Bragg Grating[J]. Chinese Journal of Lasers, 2018, 45(4): 0406002.

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