• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文会议>Challenges of Power Engineering and Environment >Numerical Investigations of Flow Structure and Heat Transfer in Rectangular Narrow Channel with Longitudinal Vortex Generators Periodically Mounted on One Side
【24h】

Numerical Investigations of Flow Structure and Heat Transfer in Rectangular Narrow Channel with Longitudinal Vortex Generators Periodically Mounted on One Side

机译：纵向涡流发生器在一侧周期性安装的矩形窄通道内流动结构和传热的数值研究

获取原文
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Flow through an interrupted or enhanced heat transfer surface may cause the natural formation of vortices that can enhance local heat transfer. In this paper, Numerical investigations of flow structure and heat transfer in a horizontal rectangular narrow channel with periodically roughened mounted by rectangular bars as Longitudinal Vortex Generators (LVGs) was carried out for water. The unsteady Navier-Stokes equations and the energy equation have been solved by a finite volume code. The development of longitudinal vortex along the flow direction and its influence on heat transfer and flow were also presented in detail while keeping the aspect ratio of LVGs constant. The effect of LVGs’ mounted height, flow direction, mounted form on heat transfer performance and pressure drop were also conducted with Reynolds number ranging from 1.5×10<'4 to 3.5×10<'4 when the incidence angler of LVGs is equal to 50°. It was found that the heat transfer performance in rectangular channel could be greatly enhanced by LVGs, and the mounted height of LVGs is greatly influence the effect of heat transfer enhancement, while the best height is 0.5mm.
机译：流经中断的传热表面或增强传热表面的流动可能会导致自然形成漩涡，从而增强局部传热。在本文中，对水进行了数值研究，该水流是在水平矩形窄通道中进行流动的数值研究，该矩形窄通道周期性地被矩形棒作为矩形纵向涡流发生器（LVG）进行粗糙化处理。不稳定的Navier-Stokes方程和能量方程已通过有限体积法求解。在保持LVG长宽比恒定的同时，还详细介绍了纵向涡流沿流动方向的发展及其对传热和流动的影响。当LVG的入射角等于1.5×10 <'4到3.5×10 <'4时，还进行了LVG的安装高度，流向，安装形式对传热性能和压降的影响。 50°。研究发现，LVGs可以大大提高矩形通道的传热性能，而LVGs的安装高度对传热增强效果有较大影响，最佳高度为0.5mm。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号