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	Numerical simulation of ground-based telescope enclosures
	Pan, Nian1,2; Ma, Wenli1; Huang, Jinlong1
	2014
会议名称	Proceedings of SPIE: International Symposium on Optoelectronic Technology and Application 2014: Imaging Spectroscopy; and Telescopes and Large Optics
会议日期	2014
卷号	9298
页码	92981H
中文摘要	In order to choose enclosure for the next generation telescopes, numerical simulation method was used. Firstly, the telescope, two general kinds of enclosures structure and the external flow field model were established, Then CFD(Computational Fluid Dynamics) technology was used to analyze the wind speed, static pressure, turbulence kinetic energy distribution and eddy around the telescope, when the telescope at two different pointing gestures and the external wind speed at 10m/s. The simulation results showed that when the telescope adapt the retractable enclosure, the wind speed of the main optical path between 6.1 m/s and 9.3 m/s, and the average static pressure (gauge pressure) on the primary mirror between 42.9268 Pa and 37.5579 Pa, however when telescope adapt the hemispherical enclosure, the wind speed of the main optical path between 3.4 m/s and 6.8 m/s, the average static pressure (gauge pressure) on the primary mirror between 12.1387 Pa and 11.105 Pa. Although the wind resistance of the retractable enclosure was lower than the hemispherical enclosure, no eddy generated near the main optical path, it provided the telescope a uniform flow field and ensured the quality of the image of a star. So the retractable enclosure would have better performance than the hemispherical enclosure. © 2014 SPIE.
英文摘要	In order to choose enclosure for the next generation telescopes, numerical simulation method was used. Firstly, the telescope, two general kinds of enclosures structure and the external flow field model were established, Then CFD(Computational Fluid Dynamics) technology was used to analyze the wind speed, static pressure, turbulence kinetic energy distribution and eddy around the telescope, when the telescope at two different pointing gestures and the external wind speed at 10m/s. The simulation results showed that when the telescope adapt the retractable enclosure, the wind speed of the main optical path between 6.1 m/s and 9.3 m/s, and the average static pressure (gauge pressure) on the primary mirror between 42.9268 Pa and 37.5579 Pa, however when telescope adapt the hemispherical enclosure, the wind speed of the main optical path between 3.4 m/s and 6.8 m/s, the average static pressure (gauge pressure) on the primary mirror between 12.1387 Pa and 11.105 Pa. Although the wind resistance of the retractable enclosure was lower than the hemispherical enclosure, no eddy generated near the main optical path, it provided the telescope a uniform flow field and ensured the quality of the image of a star. So the retractable enclosure would have better performance than the hemispherical enclosure. © 2014 SPIE.
收录类别	EI
学科主题	Enclosures - Flow fields - Gages - Kinetic energy - Kinetics - Mirrors - Numerical methods - Numerical models - Telescopes - Wind
语种	英语
ISSN号	0277786X
内容类型	会议论文
源URL	[http://ir.ioe.ac.cn/handle/181551/7497]
专题	光电技术研究所_应用光学研究室（二室）
作者单位	1.Lab of Applied Optics, Institute of Optics and Electronics, Chinese Academy of Sciences, Chengdu, China 2.Graduate School of the Chinese Academy of Sciences, Beijing, China
推荐引用方式 GB/T 7714	Pan, Nian,Ma, Wenli,Huang, Jinlong. Numerical simulation of ground-based telescope enclosures[C]. 见:Proceedings of SPIE: International Symposium on Optoelectronic Technology and Application 2014: Imaging Spectroscopy; and Telescopes and Large Optics. 2014.

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