Numerical Investigation into the Natural Convection of Cryogenic Supercritical Helium in a Spherical Enclosure
Numerical Investigation into the Natural Convection of Cryogenic Supercritical Helium in a Spherical Enclosure
复制标题
球形外壳中低温超临界氦自然对流的数值研究
DOI：
10.3390/en14092584
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发表时间：
2021-04
期刊：
影响因子：
3.2
通讯作者：
Shuiming Shu
中科院分区：
文献类型：
--
作者：
Yinan Qiu;Hua Zhai;Yao Zheng;Gang Lei;Tianxiang Wang;Li Wang;Shuiming Shu
氦，特别是超临界氦作为一种理想的增压气体，被广泛应用于各种运载火箭和航天器的增压系统中。本工作主要研究低温超临界氦在球形封闭腔内的自然对流。首先，建立了三维数值模型，并用实验数据进行了验证。然后，模拟了充气压力和加热功率对流动和换热特性的影响。同时，详细研究了瑞利数和努塞尔数之间的关系。最后，通过引入密度比，得到了改进的自然对流换热关联式。结果表明，腔内充气压力的增大有利于低温超临界氦的自然对流换热，腔内温度分布随腔内充气压力的增大而趋于均匀。对于改进的自然对流换热关联式，模拟结果与计算值的平均误差约为8%，能够更好地描述低温超临界氦在球形封闭腔内的自然对流换热。
As an ideal pressurized gas, helium, especially supercritical helium, has been widely used in the pressurization system of various launch vehicles and spacecraft. This work mainly focuses on the natural convection of cryogenic supercritical helium in a spherical enclosure. Firstly, a three-dimensional numerical model is established and verified with experimental data. Then, the effects of inflation pressure and heating power on the flow and heat transfer characteristics are simulated. At the same time, the relationship between the Rayleigh number and Nusselt number is studied in detail. Finally, an improved natural convection heat transfer correlation modified by introducing the density ratio is obtained. The results show that the increase of the inflation pressure in the cavity is helpful to enhance the natural convection heat transfer of the cryogenic supercritical helium, and the temperature distribution in the cavity tends to be more uniform when the inflation pressure in the cavity increases. As to the improved natural convection heat transfer correlation, the average error between the simulation results and the calculated values is approximately 8%, which can better describe the natural convection heat transfer of cryogenic supercritical helium in the spherical enclosure.
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影响因子：
3.9
作者：
Xiaoying Shan;D. Schmidt;J. Watkins
通讯作者：
Xiaoying Shan;D. Schmidt;J. Watkins
影响因子：
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作者：
E. H. Bishop;L. R. Mack;J. Scanlan
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DOI：
10.1016/j.ijheatmasstransfer.2019.02.048
发表时间：
2019-06-01
影响因子：
5.2
作者：
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通讯作者：
Park, Yong Gap
影响因子：
6
作者：
G. J. Reddy;H. Basha;N. S. V. Narayanan
通讯作者：
G. J. Reddy;H. Basha;N. S. V. Narayanan
DOI：
10.1007/978-1-4613-4039-3_40
发表时间：
1978
期刊：
--
影响因子：
--
作者：
F. Irie;T. Matshushita;M. Takeo;G. Klipping;K. Lüders;U. Ruppert
通讯作者：
F. Irie;T. Matshushita;M. Takeo;G. Klipping;K. Lüders;U. Ruppert