伞蜥颈部褶皱自然对流换热的数值模拟研究*

doi:10.7523/j.ucas.2022.078

中国科学院大学学报

伞蜥颈部褶皱自然对流换热的数值模拟研究^*

贾崇熙, 王豪, 刘捷^†, 卢文强

中国科学院大学工程科学学院,北京 100049

收稿日期:2022-06-21 修回日期:2022-08-30 发布日期:2022-09-21
通讯作者: †E-mail: nauty@ucas.ac.cn
基金资助:
^*中央高校基本科研业务费专项资金资助

Numerical study of the natural convection heat transfer from the neck folds of the frill-neck lizard

JIA Chongxi, WANG Hao, LIU Jie, LU Wenqiang

School of Engineering Sciences, University of Chinese Academy of Sciences, Beijing 100049, China

Received:2022-06-21 Revised:2022-08-30 Published:2022-09-21

摘要/Abstract

摘要： 本文对伞蜥这一有特殊散热结构的爬行动物进行物理建模并对该模型展开自然对流传热特性的数值研究。研究发现,对于伞蜥的颈部褶皱不同张角调节模拟,在45°~85°范围内有且只有一个换热系数的最大值且在65°附近取得。同时改变伞蜥颈部褶皱的大小,同样发现有唯一对流传热系数的最大值在6.3≤L₀/d≤6.6内取得。模拟得到的最大传热速率对应的张角和面积均接近选取亚种的自然状态,由此可以推测伞蜥的颈部褶皱的进化方向可能朝有利于提高自然对流传热速率的方向进行,从而认为伞蜥与外界环境的自然对流可能是影响伞蜥颈部褶皱进化方向的重要原因之一。

关键词: 伞蜥颈部褶皱, 自然对流, $\overline{N u}$数, 数值模拟

Abstract: In this paper, the physical modeling of Chlamydosaurus kingii, a reptile with special heat dissipation structure, was carried out, and the natural convection heat transfer properties of it were numerically studied. It was found that there was only one maximum heat transfer coefficient in the range of 45°~85°, which was obtained at around 65° for the simulation of different field angle adjustment of Chlamydosaurus kingii neck fold. At the same time, by changing the size of Chlamydosaurus kingii neck fold, it was also observed that there was a unique maximum convection heat transfer coefficient in the range of 6.3≤L₀/d≤6.6. In addition, the field angle and area corresponding to the maximum heat transfer rate were close to the natural state of Australian subspecies. Therefore, it can be inferred that the evolution direction of Chlamydosaurus kingii neck fold may be beneficial to improving the natural convection heat transfer rate. Hence, the natural convection between Chlamydosaurus kingii and external environment may be considered as an important reason affecting the evolution direction of Chlamydosaurus kingii neck fold.

Key words: neck folds of the frill-neck lizard, natural convection, $\overline{N u}$ number, numerical simulation

中图分类号:

TK124

贾崇熙, 王豪, 刘捷, 卢文强. 伞蜥颈部褶皱自然对流换热的数值模拟研究^*[J]. 中国科学院大学学报, DOI: 10.7523/j.ucas.2022.078.

JIA Chongxi, WANG Hao, LIU Jie, LU Wenqiang. Numerical study of the natural convection heat transfer from the neck folds of the frill-neck lizard[J]. Journal of University of Chinese Academy of Sciences, DOI: 10.7523/j.ucas.2022.078.

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伞蜥颈部褶皱自然对流换热的数值模拟研究^*

Numerical study of the natural convection heat transfer from the neck folds of the frill-neck lizard

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