Natural convection in cylinder with internal slotted annulus under different structures

doi:10.11949/j.issn.0438-1157.20160671

CIESC Journal ›› 2016, Vol. 67 ›› Issue (S1): 84-90.DOI: 10.11949/j.issn.0438-1157.20160671

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Natural convection in cylinder with internal slotted annulus under different structures

SHEN Chunyun¹, LU Tingkang², DAI Zhenghua², YANG Mo¹

1 University of Shanghai for Science and Technology, Shanghai 200093, China;
2 Pudong New Area Special Equipment Supervision and Inspection Institute, Shanghai 200136, China

Received:2016-05-16 Revised:2016-05-31 Online:2016-08-31 Published:2016-08-31
Supported by:
supported by the National Natural Science Foundation of China (51476103)，the Public Welfare Scientific Research Project of Shanghai Quality and Technical Supervision Bureau (2012-41,2012-12)and the Innovation Program of Shanghai Municipal Education Commission (14ZZ134).

几何结构对圆内开缝圆自然对流的影响

申春赟¹, 陆廷康², 戴正华², 杨茉¹

1 上海理工大学能源与动力工程学院, 上海 200093;
2 上海市浦东新区特种设备监督检验所, 上海 200136

通讯作者: 杨茉,yangm@usst.edu.cn
基金资助:
国家自然科学基金项目（51476103）；上海市质量技术监督局公益科研项目（2012-41，2012-12）；上海市教育委员会科研创新项目（14ZZ134）。

Abstract

Abstract:

SIMPLE algorithm was used to simulate natural convection in a cylinder with an internal slotted annulus under different slotted structures, the influence on the heat transfer and fluid flow was studied when changing slotted degree and radius ratio. The results showed that under the same conditions calculated numerical results were in good agreement with the existing experimental results. The slot can enhance the heat transfer, but not slotted degree the greater the better. Radius ratio influenced on the heat transfer, showing that the radius ratio was smaller, the annular space more narrow, so the heat transfer effect was worse. With the increase of the radius ratio, the K_eq increased obviously, but when the radius ratio exceeded 2, the K_eq remained the same.

Key words: natural convection, nonlinear dynamics, computer simulation, slotted degree, radius ratio

摘要：

采用SIMPLE算法，对不同几何结构圆内开缝圆自然对流换热进行数值模拟，研究了开缝度、半径比改变对流动换热的影响。结果表明，在相同条件下计算数值结果与已有的实验结果吻合良好；把内圆开缝可以强化换热，但并非开缝度越大换热越好；半径比对换热效果产生影响，表现为半径比越小，环形空间越窄，换热效果越差。随着半径比的增大，K_eq显著增加，当半径比超过2.0时，K_eq基本保持不变。

关键词: 自然对流, 非线性动力学, 计算机模拟, 开缝度, 半径比

CLC Number:

TK124

SHEN Chunyun, LU Tingkang, DAI Zhenghua, YANG Mo. Natural convection in cylinder with internal slotted annulus under different structures[J]. CIESC Journal, 2016, 67(S1): 84-90.

申春赟, 陆廷康, 戴正华, 杨茉. 几何结构对圆内开缝圆自然对流的影响[J]. 化工学报, 2016, 67(S1): 84-90.

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Natural convection in cylinder with internal slotted annulus under different structures

几何结构对圆内开缝圆自然对流的影响

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