Analysis of thermal shock resistance of CVD ZnS dome
文献类型：会议论文
| 作者 | Zhang DJ(张代军); Luo HB(罗海波) ; Zhou PP(周培培); Hou XL(侯幸林)
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| 出版日期 | 2016 |
| 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 |
| 关键词 | CVD ZnS thermal shock resistance thermal stress flexure strength turbulent heat transfer |
| 页码 | 1-7 |
| 通讯作者 | 张代军 |
| 中文摘要 | 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. |
| 收录类别 | EI ; CPCI（ISTP） |
| 产权排序 | 1 |
| 会议录 | Proceedings of SPIE - The International Society for Optical Engineering
 |
| 会议录出版者 | SPIE |
| 会议录出版地 | Bellingham, WA |
| 语种 | 英语 |
| ISSN号 | 0277-786X |
| ISBN号 | 978-1-5106-0772-9 |
| WOS记录号 | WOS:000391228600122 |
| 源URL | [http://ir.sia.cn/handle/173321/19483]  |
| 专题 | 沈阳自动化研究所_光电信息技术研究室 |
| 推荐引用方式 GB/T 7714 | Zhang DJ,Luo HB,Zhou PP,et al. Analysis of thermal shock resistance of CVD ZnS dome[C]. 见:International Symposium on Infrared Technology and Application and the International Symposiums on Robot Sensing and Advanced Control. Beijing. May 9-11, 2016. |
入库方式： OAI收割
来源：沈阳自动化研究所
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