管内周期性自旋流强化传热的结构优化

WANG Yangjun; DENG Xianhe; HONG Mengna; LI Zhiwu

您当前的位置：

首页 >

文章列表页 >

管内周期性自旋流强化传热的结构优化

更新时间：2025-12-10

- 管内周期性自旋流强化传热的结构优化
- CIESC Journal Issue 11, (2006)
- 作者机构：
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Online First：25 November 2006，
  
  Published：25 November 2006
- 稿件说明：
移动端阅览
WANG Yangjun, DENG Xianhe, HONG Mengna, et al. 管内周期性自旋流强化传热的结构优化[J]. CIESC Journal, 2006, (11).
DOI：

WANG Yangjun, DENG Xianhe, HONG Mengna, et al. 管内周期性自旋流强化传热的结构优化[J]. CIESC Journal, 2006, (11). DOI：

摘要

在圆管内间隔插入多个旋流片的流道中，流体流动呈现周期性自旋流.用数值模拟方法对空气湍流情况的传热和流阻性能受相邻旋流片间距Lp、旋流角β和旋转角α3个因素的影响进行了分析，并得出旋流片的优化结构，而且实验验证了数值模拟预测的正确性.结果表明：α越大，传热性能越好，阻力越大;Lp越小，传热性能越好，阻力越大;β越大，传热性能越好，而阻力损失因受到摩擦阻力和形体阻力的综合影响而呈现非单调变化.旋流片的最佳结构参数为：旋流角β为20.3°，旋转角α为180°，相邻旋流片间距Lp为33d.与α相比，β对传热和流阻性能的影响更显著.

Abstract

The influences of twisted-leaf piech Lp

swirl angle β and twist angle α on the characteristics of heat transfer and flow resistance of plain circular tube with inserted twisted-leaves discontinuously for air turbulent flow were analyzed in detail by numerical simulation and the optimized structure of the twisted-leaves was obtained based on heat transfer enhancement valuation factor η.In addition

the numerical simulation predictions were verified by experiment.The results indicated that the larger the α

the better the performance of heat transfer and the greater the flow resistance; the larger the Lp

the worse the performance of heat transfer and the smaller the flow resistance; the larger the β

the better performance of heat transfer while the variation of flow resistance was not monotone because of the combined control of friction resistance and shape drag.The optimized structure parameters of twisted-leaf were swirl angle β=20.3°

twist angle α=180°

twisted-leaf pitch Lp=33d（d means the width of twisted-leaf）.Furthermore

compared with twist angle α

the influence of swirl angle β on heat transfer enhancement was much stronger.

关键词

Keywords

references

Views

388

下载量

CSCD

Alert me when the article has been cited

提交

Tools

Publicity Resources

Mixed matrix membranes based on nitrogen-rich Schiff base network polymer and their CO2 separation performance

Zn-doped PdO/ZrO2 with rich oxygen vacancies for the synthesis of diphenyl carbonate from CO2 and phenol

Advantages and risks of swirling cooling granulation towers

Thermo-oxidative degradation characteristics of TPT backsheet from end-of-life photovoltaic modules

Analysis of flow field characteristics and mixing performance of different SK-type static mixers

Related Author

No data

Related Institution

No data

⁰