标准黑体源用铜-R134a热管研制及均温性实验研究
|
摘要
针对热管倾斜放置时均温性恶化的情况,改进了黑体源热管结构,设计了一个标准黑体源用铜-R134a热管并进行了实验研究,测试了倾角、运行温度及充液量对其均温性的影响。以区域温度的标准差作为热管均匀性的衡量标准,实验发现倾角小于45°情况下,该热管倾斜的角度对热管温度的均匀性影响不大;热管温度均匀性随着热管运行温度的升高而逐渐变差;当热管运行温度在40~50℃时,热管温度均匀性随充液量变化不大。
As the temperature uniformity of the heat pipe will deteriorate when it is inclined,a Cu-R134 a blackbody source heat pipe with advanced structure has been tested to investigate the influence of inclined angle,operating temperature and filling ratio on the temperature uniformity of the heat pipe.The regional temperature standard deviation was proposed as the heat pipe temperature uniformity metrics.It was found that when the inclined angle was less than 45°,the inclined angle have little influence on the uniformity of temperature field.And the temperature uniformity got worse when operating temperature increased.When the operating temperature was between 40~50℃,the temperature uniformity of the heat pipe changed little with the filling ratio.
As the temperature uniformity of the heat pipe will deteriorate when it is inclined,a Cu-R134 a blackbody source heat pipe with advanced structure has been tested to investigate the influence of inclined angle,operating temperature and filling ratio on the temperature uniformity of the heat pipe.The regional temperature standard deviation was proposed as the heat pipe temperature uniformity metrics.It was found that when the inclined angle was less than 45°,the inclined angle have little influence on the uniformity of temperature field.And the temperature uniformity got worse when operating temperature increased.When the operating temperature was between 40~50℃,the temperature uniformity of the heat pipe changed little with the filling ratio.
引文
[1]徐恒,韩义中,杨永军.黑体辐射源的发展[J].计测技术,2009,29(5):1-3.
[2]Chu B,Machin G.A low-temperature blackbody reference source to-40℃[J].Measurement Science and Technology,1999,10(1):1-6.
[3]Hollandt J,Fruedrich R,Gutschwager B,et al.Highaccuracy radiation thermometry at the National Metrology Institute of Germany,the PTB[J].High TemperaturesHigh Pressures,2003,35(4):379-415.
[4]Hartmann J.High-temperature measurement techniques for the application in photometry,radiometry and thermometry[J].Physics Reports,2009,469(5):205-269.
[5]Hill K D,Woods D J.Characterizing the NRC Blackbody Sources for Radiation Thermometry from 150℃to 962℃[J].J Thermophys,2009,30(1):105-123.
[6]黄燊彦,郝小鹏,王景辉,等.铯、钠热管标准黑体辐射源研制及性能评价[J].计量学报,2014,35(2):120-124.
[7]盛骤,谢式千,潘承毅,概率与数理统计[M].北京:高等教育出版社,2008.
[2]Chu B,Machin G.A low-temperature blackbody reference source to-40℃[J].Measurement Science and Technology,1999,10(1):1-6.
[3]Hollandt J,Fruedrich R,Gutschwager B,et al.Highaccuracy radiation thermometry at the National Metrology Institute of Germany,the PTB[J].High TemperaturesHigh Pressures,2003,35(4):379-415.
[4]Hartmann J.High-temperature measurement techniques for the application in photometry,radiometry and thermometry[J].Physics Reports,2009,469(5):205-269.
[5]Hill K D,Woods D J.Characterizing the NRC Blackbody Sources for Radiation Thermometry from 150℃to 962℃[J].J Thermophys,2009,30(1):105-123.
[6]黄燊彦,郝小鹏,王景辉,等.铯、钠热管标准黑体辐射源研制及性能评价[J].计量学报,2014,35(2):120-124.
[7]盛骤,谢式千,潘承毅,概率与数理统计[M].北京:高等教育出版社,2008.