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Analysis of thermal shock resistance of CVD ZnS dome
Zhang DJ(张代军); Luo HB(罗海波); Zhou PP(周培培); Hou XL(侯幸林)
作者部门光电信息技术研究室
会议名称International Symposium on Infrared Technology and Application and the International Symposiums on Robot Sensing and Advanced Control
会议日期May 9-11, 2016
会议地点Beijing
会议录名称Proceedings of SPIE - The International Society for Optical Engineering
出版者SPIE
出版地Bellingham, WA
2016
页码1-7
收录类别EI ; CPCI(ISTP)
EI收录号20170503310030
WOS记录号WOS:000391228600122
产权排序1
ISSN号0277-786X
ISBN号978-1-5106-0772-9
关键词Cvd Zns Thermal Shock Resistance Thermal Stress Flexure Strength Turbulent Heat Transfer
摘要

Since the dome experiences the convective heat loading, thermal stress will be generated in the thickness direction. Thus, estimation of the thermal shock and analysis of the thermal shock resistance of the dome are the key to the design of the dome. In this paper, thermal shock resistance of CVD ZnS dome is analysed based on the flight condition of 6000m altitude and 3.0 Mach. We obtained the critical Reynolds number through a rockets pry experiment, which deduced that there exits a transition from laminar flow to turbulent flow at somewhere over the dome. We calculated the heat transfer coefficient over dome through heat transfer coefficient engineering formula of high-speed sphere with turbulent boundary layer near the stagnation point. The largest heat transfer coefficient is 2590W/(m 2 .K). Then, we calculated the transient thermal stress of dome by using the finite element method. Then we obtained the temperature and thermal stress distribution of different time through the direction of thickness. In order to obtain the mechanical properties of CVD ZnS at high temperatures, the 3-point bending method was used to test the flexure strength of CVD ZnS at different temperature. When compared the maximum thermal stress with flexure strength at different temperature, we find that the safety factors were not less than 1.75. The result implied that the dome has good safety margin under the proposed application condition. Through the above test and analysis, we can get the conclusion that the thermal shock resistance of the CVD ZnS dome satisfied the requirements of flight conditions.

语种英语
引用统计
文献类型会议论文
条目标识符http://ir.sia.cn/handle/173321/19483
专题光电信息技术研究室
通讯作者Zhang DJ(张代军)
作者单位1.Shenyang Institute of Automation, Chinese Academy of Science, Shenyang, 110016, China
2.University of Chinese Academy of Science, Beijing, 100049, China
3.Key Laboratory of Optical-Electronics Information Processing, Chinese Academy of Science, Shenyang, 110016, China
4.Key Laboratory of Image Understanding and Computer Vision, Shenyang, 110016, China
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GB/T 7714
Zhang DJ,Luo HB,Zhou PP,et al. Analysis of thermal shock resistance of CVD ZnS dome[C]. Bellingham, WA:SPIE,2016:1-7.
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