Numerical Simulation of the Effect of Centrifugal Buoyancy on the Turbulent Mixed Convection Heat Transfer

doi:10.7652/xjtuxb201411004

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Numerical Simulation of the Effect of Centrifugal Buoyancy on the Turbulent Mixed Convection Heat Transfer

更新时间：2025-07-09

- Numerical Simulation of the Effect of Centrifugal Buoyancy on the Turbulent Mixed Convection Heat Transfer
- Vol. 48, Issue 11, Pages: 20-24+43(2014)
- 作者机构：
  
  国家核电技术有限公司北京研发中心,北京,100190
- 作者简介：
- 基金信息：
- DOI：10.7652/xjtuxb201411004
  CLC： TK124
- Online First：10 November 2014，
  
  Published：2014
- 稿件说明：
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Numerical Simulation of the Effect of Centrifugal Buoyancy on the Turbulent Mixed Convection Heat Transfer[J]. 2014, 48(11): 20-24+43.
DOI：

Numerical Simulation of the Effect of Centrifugal Buoyancy on the Turbulent Mixed Convection Heat Transfer[J]. 2014, 48(11): 20-24+43. DOI： 10.7652/xjtuxb201411004.

摘要

为研究离心浮升力对旋转设备中流动与换热的影响

采用直接数值模拟方法对径向旋转轴向出流通道内充分发展湍流进行了研究。湍流雷诺数、旋转数和普朗特数分别保持为300、1.5和0.71

对格拉晓夫数分别为0、9 000、20 000以及50 000情况下的流动与换热特性进行了模拟与分析

结果表明:主流速度、温度和二次流均随离心浮升力的增加而增强

最大主流速度和最小温度出现在非稳定侧; 随离心浮升力增加

速度脉动增强

温度脉动在非稳定侧先增强再减弱

在稳定侧则是先减弱再增强; 随离心浮升力增加

稳定壁面的换热增强

非稳定壁面换热则是先增强后减弱。

Abstract

In order to investigate the influence of centrifugal buoyancy on the fluid flow and heat transfer in rotary machinery

studies have been carried out for a rotary radially outward developed turbulent flow by using direct numerical simulation(DNS)method. The turbulent Reynolds number

rotation number and Prandtl number of the flow are kept at 300

1.5

0.71

respectively

then simulations and analysis are conducted for characteristics of flow and heat transfer with Grashof number equal to 0

9 000

20 000

and 50 000

respectively. The results indicate that the mainstream velocity

temperature and secondary flow all increase with the centrifugal buoyancy forces. The maximum mainstream velocity and the minimum temperature appear in the side of the unstable wall. With the increase of centrifugal buoyancy forces

the velocity fluctuation is strengthened; the temperature fluctuation increases firstly then decreases in the side of the unstable wall

however it decreases firstly then increases in the side of the stable wall; the heat transfer performance on the stable wall is enhanced and becomes better firstly then worse on the unstable wall.

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references

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Related Author

马良栋 1

李增耀 1

陶文铨 1

陶文铨

李增耀

阳祥

XI Guang

Related Institution

School of Civil and Hydraulic Engineering, Dalian University of Technology

School of Energy and Power Engineering, Xi'an Jiaotong University

School of Energy and Power Engineering, Xi’an Jiaotong University

College of Environmental Science and Engineering, Chang'an University

Xi'an Jiaotong University Suzhou Academy

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