摘要
目的设计一种新型热流测量装置,使传感器满足长时间热流测量的需求,且传感器外表面可以适量打磨,与飞行器的气动外型面完好随型。方法采用铜和钢作为备选材料,施加相同的表面热流边界,对比敏感端内外壁温差情况。优化热流辨识传感器传热路径、敏感端厚度,通过有限元模型分析打磨对热流辨识结果的影响。基于优化结果,研制出热流测量装置,并通过地面试验验证该装置的有效性。结果从热响应获取时间延迟角度来看,Cu比钢具有较大的优势。综合考虑敏感端外表面需要与飞行器外表面随型打磨,选用5 mm的厚度具有一定的安全可靠性。敏感端的适度打磨基本不影响温度测量结果。辨识获得的热流数据与实际控制热流吻合较好,最大偏差约15%。结论成功研制了热流测量装置,并通过地面热试验证明了热流测量的有效性。
The paper aims to design a new type of heat flow measuring device,to make the sensor meet the needs of heat flow measurement for a long time.The external surface of the sensor can be moderately ground to fit with the aerodynamic exterior surface of the aircraft properly.With copper and steel as alternative materials,the same surface heat flux boundary was applied to contrast sensitive side temperature difference inside and outside the wall.The heat transmission path and the of the sensitive side thickness of the heat flow thickness identification sensor were optimized to analyze the influences on the grinding heat flux identification results through the finite element model.Based on optimization results,the heat flow measuring device was developed,and the effectiveness of the device was verified through ground test.From the perspective of time delay obtained from thermal response,Cu had a great advantage than steel.After comprehensive consideration,the sensitive side surface needed be grounded according to the exterior surface the aircraft.The thickness of 5 mm had safety and reliability to a certain extent.Proper grounding of the sensitive side had little effect on the temperature measurement results.Heat flow data obtained through identification was in line with the actual control of heat flow,and the maximum deviation was about 15%.The heat flow measurement device is developed successfully,and its validity is proved through the ground thermal test.
作者
刘国仟
李宇
刘宇飞
徐晓亮
崔占中
周禹
LIU Guo-qian;LI Yu;LIU Yu-fei;XU Xiao-liang;CUI Zhan-zhong;ZHOU Yu(Key Laboratory of Science and Technology on Space Physics,China Academy of Launch Vehicle Technology,Beijing 100076,China)
出处
《装备环境工程》
CAS
2020年第1期31-35,共5页
Equipment Environmental Engineering
关键词
热流测量
传感器
飞行器
敏感端
heat flow measurement
sensor
aircraft
sensitive side
