第19卷第5期 2011年5月
号1004924X(2011)05-0951-08
文章编号
光学精密工程
Optics and Precision Engineering
Vol.19No.5
May 2011
太阳辐照500m口径球面射电望远镜的温度分布
宋立强，王启明，郭永卫
（中国科学院国家天文台，北京100012）
0 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”间题解析及热流计算、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、微波人口直径等因索有关，当反射面反射率为0.2、孔陈率为0.4时，馈源舱最高温度为47.56℃，时间约在12100；反射面最高温度为68.34℃时，时间是在14：00，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。
关键调：500m口径球面新电望选镜；太灶；馈源舱；反射面；温度分布
中图分类号：TH75
文麟标识码：A
doi:10.3788/OPE.20111905.0951
TemperaturedistributionofFASTundersolarradiation
Song Li-qiang', Wang Qi-ming, Guo Yong-wei
(National Astronomical Obseruatories,ChineseAcademy of Sciences,Beijing100012,China)
Corresponding auther,E-mail;slqzhy@sina.com
Abstract: To master the temperature distribution and "Solar cooker" of a Five-hundred-meter Aper ture Spherical Radio Telescope(FAST) and to protect instruments in a feed cabin under the solar radi-ation, 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 con-ditions show that the reflector reflectivity is O. 2, porosity rate is O. 4 and the maximum temperature of the feed cabin is 47, 56 C at 12 : 00. Furthermore, the temperature of reflector surface reaches maxi-mum 68. 34 C at 14 t 00, in which the minimum temperature is 35. 03 C,and the temperature differ ence of reflector is 33. 31 C. 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.
收稿日期：2010-06-25；修订日期：2010-11-10.
基金项目：国家自然科学基金资助项目(No.10878017)；中围科学院国家天文台青年人才基金资助项目