| 低温罩表面结霜过程数值模拟 |
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| 引用本文： | 王丽红,王骥,温永刚,陈光奇,董亮,孙冬花.低温罩表面结霜过程数值模拟[J].真空与低温,2010,16(4):214-218,237. |
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| 作者姓名： | 王丽红 王骥 温永刚 陈光奇 董亮 孙冬花 |
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| 作者单位： | 兰州物理研究所真空低温技术与物理重点实验室,甘肃兰州730000 |
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| 基金项目： | "十一五"航天技术支撑项目 |
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| 摘 要： | 对低温罩表面结霜过程进行了数值模拟研究。通过能量和质量平衡方程建立了低温罩结霜的物理模型,考虑了霜层厚度增加的传质和传热过程。据此分析了来流空气的温度、相对湿度、速度及冷壁面温度对霜层表面温度和霜层厚度的影响。计算结果表明,来流空气的温度及冷壁面温度对结霜的影响较大,而来流空气的速度和相对湿度对结霜的影响则较小。最后指出了对低温罩在加注低温液体时采取隔热防霜措施的必要性。
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| 关 键 词： | 低温罩 表面温度 结霜模型 传热传质 |
SIMULATION STUDY ON FROSTING PROCESS OF CRYOGENIC ENCLOSER |
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| WANG Li-hong,WANG Ji,WEN Yong-gang,CHEN Guang-qi,DONG Liang,SUN Dong-hua.SIMULATION STUDY ON FROSTING PROCESS OF CRYOGENIC ENCLOSER[J].Vacuum and Cryogenics,2010,16(4):214-218,237. |
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| Authors: | WANG Li-hong WANG Ji WEN Yong-gang CHEN Guang-qi DONG Liang SUN Dong-hua |
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| Affiliation: | (Science and Technology on Vacuum ＆ Cryogenics Technology and Physics Laboratory,Lanzhou Institute of Physics,Lanzhou 730000,China) |
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| Abstract: | The frost formation of cryogenic encloser is studied with simulation method. A mathematical model is established by energy conservation and mass conservation during frosting process, in which heat transmission and mass transport process are considered. Then the influence of inflow air temperature, relative humidity, flow speed and cold wall temperature on the surface temperature and thickness of frost layer are analyzed based on the model. The simulation shows that the influence of inflow air and cold wall temperature are larger than those of flow speed and relative humidity. The necessity is pointed out to adopt some heat insulation and frost protection methods during cryogenic liquid filling process. |
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| Keywords: | cryogenic encloser surface temperature frosting model heat transmission and mass transport |
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