Temperature distribution of FAST under solar radiation

Song Li-qiang; Wang Qi-ming; Guo Yong-wei

doi:10.3788/OPE.20111905.0951

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Temperature distribution of FAST under solar radiation

Article | 更新时间：2020-08-12

- Temperature distribution of FAST under solar radiation
- Optics and Precision Engineering Vol. 19, Issue 5, Pages: 951-958(2011)
- 作者机构：
  
  中国科学院国家天文台北京 100012
- 作者简介：
- 基金信息：
- DOI：10.3788/OPE.20111905.0951
  CLC： TH75
- Received：25 June 2010，
  
  Revised：10 November 2010，
  
  Published Online：26 May 2011，
  
  Published：26 May 2011
- 稿件说明：
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宋立强, 王启明, 郭永卫. 太阳辐照500 m口径球面射电望远镜的温度分布[J]. 光学精密工程, 2011,19(5): 951-958

Song Li-qiang, Wang Qi-ming, Guo Yong-wei. Temperature distribution of FAST under solar radiation[J]. Editorial Office of Optics and Precision Engineering, 2011,19(5): 951-958
宋立强, 王启明, 郭永卫. 太阳辐照500 m口径球面射电望远镜的温度分布[J]. 光学精密工程, 2011,19(5): 951-958 DOI： 10.3788/OPE.20111905.0951.

Song Li-qiang, Wang Qi-ming, Guo Yong-wei. Temperature distribution of FAST under solar radiation[J]. Editorial Office of Optics and Precision Engineering, 2011,19(5): 951-958 DOI： 10.3788/OPE.20111905.0951.

摘要

为了掌握500 m口径球面射电望远镜(FAST)在太阳辐照下的温度分布

弱化它的"太阳灶"问题

保护馈源舱内相关仪器

对太阳辐照FAST温度场进行了研究

包括太阳相关参数研究、"太阳灶"问题解析及热流计算、台址地貌对FAST的阳光遮挡及不同工况下的FAST温度分布等。结果表明

FAST馈源舱温度分布不仅与反射面反射率、孔隙率和辐照时间有关

而且与馈源舱防护罩的反射率、材料、焦舱位置、微波入口直径等因素有关。当反射面反射率为0.2、孔隙率为0.4时

馈源舱最高温度为47.56 ℃

时间约在T12:00;反射面最高温度为68.34 ℃时

时间是在T14:00

此时与反射面最低温度为35.03 ℃时的温差为33.31 ℃;文章还计算了形成太阳灶的时间域

最后为FAST的相关设计及使用提出了意见和建议。

Abstract

To master the temperature distribution and "Solar cooker" of a Five-hundred-meter Aperture Spherical Radio Telescope(FAST) and to protect instruments in a feed cabin under the solar radiation

the temperature distributions of the FAST are studied in detail

which includes sun parameters

"Solar cooker" calculation

heat flows and the temperature distribution of the FAST under different work conditions. The results indicate that the feed cabin temperature distribution is not only relevant to the reflector reflectivity

porosity rate

and the radiation time

but also to the reflectivity of the shield

materials

the diameter of microwave inlet and other factors. The analysis results of work conditions show that the reflector reflectivity is 0.2

porosity rate is 0.4 and the maximum temperature of the feed cabin is 47.56 ℃ at 12∶00.Furthermore

the temperature of reflector surface reaches maximum 68.34℃ at 14∶00

in which the minimum temperature is 35.03 ℃

and the temperature difference of reflector is 33.31 ℃. Moreover

the time domain of solar cookers is simulated.Finally

it gives the comments and suggestions for the design and use of FAST. The research in this paper not only obtains the temperature distribution of the FAST

but also provides references for the design and use of the FAST.

关键词

Keywords

references

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