• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>International journal of numerical methods for heat & fluid flow >Effect of wall-mounted V-baffle position in a turbulent flow through a channel Analysis of best configuration for optimal heat transfer
【24h】

Effect of wall-mounted V-baffle position in a turbulent flow through a channel Analysis of best configuration for optimal heat transfer

机译：通过通道的湍流中壁装式V形挡板位置的影响分析最佳配置以实现最佳传热

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Purpose The purpose of this paper is to carry out a numerical study on the dynamic and thermal behavior of a fluid with a constant property and flowing turbulently through a two-dimensional horizontal rectangular channel. The upper surface was put in a constant temperature condition, while the lower one was thermally insulated. Two transverse, solid-type obstacles, having different shapes, i.e. flat rectangular and V-shaped, were inserted into the channel and fixed to the top and bottom walls of the channel, in a periodically staggered manner to force vortices to improve the mixing, and consequently the heat transfer. The flat rectangular obstacle was put in the first position and was placed on the hot top wall of the channel. However, the second V-shaped obstacle was placed on the insulated bottom wall, at an attack angle of 45 degrees; its position was varied to find the optimum configuration for optimal heat transfer. Design/methodology/approach The fluid is considered Newtonian, incompressible with constant properties. The Reynolds averaged Navier-Stokes equations, along with the standard k-epsilon turbulence model and the energy equation, are used to control the channel flow model. The finite volume method is used to integrate all the equations in two-dimensions; the commercial CFD software FLUENT along with the SIMPLE-algorithm is used for pressure-velocity coupling. Various values of the Reynolds number and obstacle spacing were selected to perform the numerical runs, using air as the working medium. Findings The channel containing the flat fin and the 45 degrees V-shaped baffle with a large Reynolds number gave higher heat transfer and friction loss than the one with a smaller Reynolds number. Also, short separation distances between obstacles provided higher values of the ratios Nu/Nu(0) and f/f(0) and a larger thermal enhancement factor (TEF) than do larger distances. Originality/value This is an original work, as it uses a novel method for the improvement of heat transfer in completely new flow geometry.
机译：目的本文的目的是对具有恒定特性并湍流通过二维水平矩形通道的流体的动态和热行为进行数值研究。将上表面置于恒温条件下，而将下表面隔热。将具有不同形状（即扁平矩形和V形）的两个横向，固态障碍物以周期性交错的方式插入通道并固定在通道的顶壁和底壁上，以迫使涡流改善混合，因此传热。将扁平的矩形障碍物置于第一位置，并将其放置在通道的热顶壁上。但是，第二个V形障碍物以45度的迎角放置在隔热的底壁上。改变其位置以找到用于最佳传热的最佳配置。设计/方法/方法流体被视为牛顿流体，不可压缩，具有恒定特性。雷诺平均Navier-Stokes方程，以及标准的k-ε湍流模型和能量方程，用于控制通道流模型。有限体积法用于将所有方程二维积分。商业CFD软件FLUENT和SIMPLE算法一起用于压力-速度耦合。使用空气作为工作介质，选择了雷诺数和障碍物间距的各种值来执行数值模拟。结论与雷诺数较小的通道相比，包含扁平鳍片和45度V形挡板的通道具有较大的雷诺数，该通道具有更高的传热和摩擦损失。而且，障碍物之间的短距离提供了比较大距离更大的比率Nu / Nu（0）和f / f（0）值和较大的热增强因子（TEF）。原创性/价值这是一项原创作品，因为它使用了一种新颖的方法来改善全新流动几何中的热传递。

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