Performance analysis of the retractable dome for the Chinese Large Telescope

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	Performance analysis of the retractable dome for the Chinese Large Telescope
	Nian, Pan 1,2; Wen-Li, Ma 1
刊名	OPTICS EXPRESS
	2015-10-05
卷号	23 期号:20 页码:25376-25405
ISSN号	1094-4087
英文摘要	In order to quantitatively assess the influence of the retractable dome on the observational performance of the 4-m Chinese Large Telescope (CLT), an integrated analysis method based on computational fluid dynamics (CFD) and sub-harmonic phase screen is proposed in this paper. The pressure, the temperature, and the speed of air surrounding the retractable dome are attained by CFD simulations, and then the fluctuation of refractive index of air is calculated. Based on sub-harmonic phase screen algorithm, three kinds of performance evaluation parameters are presented: irradiance, phase of the target, and Full Width Half Maximum (FWHM). The wind tunnel tests (WT) with a 1: 120 scaled model of the retractable dome for the CLT are conducted to verify the calculated precision of the CFD. The results show that the fluctuation of air refractive index surrounding the CLT is mainly caused by the inhomogeneous distribution of temperature and speed, and with the help of pier's height the impact of inhomogeneous air temperature from the ground layer on the fluctuation of air refractive index can be effectively decreased. Furthermore, the lower of the air speed is, the better performance of the retractable dome will be, and when the speed of air is less than 5m/s, the dome seeing induced by the retractable dome on the observational wave front is less than 0.13 arcsec. (C) 2015 Optical Society of America
WOS标题词	Science & Technology ; Physical Sciences
类目[WOS]	Optics
研究领域[WOS]	Optics
关键词[WOS]	AIR-FLOW ; OPTICAL TELESCOPE ; TUNNEL TESTS ; WIND LOADS ; ENCLOSURES ; SIMULATIONS ; MIRROR
收录类别	SCI
语种	英语
WOS记录号	WOS:000365077900001
公开日期	2016-02-26
内容类型	期刊论文
源URL	[http://ir.ioe.ac.cn/handle/181551/3765]
专题	光电技术研究所_光电技术研究所被WoS收录文章
作者单位	1.Chinese Acad Sci, Inst Opt & Elect, Chengdu 610209, Sichuan, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Nian, Pan,Wen-Li, Ma. Performance analysis of the retractable dome for the Chinese Large Telescope[J]. OPTICS EXPRESS,2015,23(20):25376-25405.
APA	Nian, Pan,&Wen-Li, Ma.(2015).Performance analysis of the retractable dome for the Chinese Large Telescope.OPTICS EXPRESS,23(20),25376-25405.
MLA	Nian, Pan,et al."Performance analysis of the retractable dome for the Chinese Large Telescope".OPTICS EXPRESS 23.20(2015):25376-25405.