首页> 外文期刊>International Journal of Heat and Mass Transfer >Constructal design of forced convective flows in channels with two alternated rectangular heated bodies
【24h】

Constructal design of forced convective flows in channels with two alternated rectangular heated bodies

机译:具有两个交替的矩形加热体的通道中强制对流流动的结构设计

获取原文
获取原文并翻译 | 示例
           

摘要

Present numerical study performs a geometrical optimization by means of Constructal Design and Exhaustive Search of two alternated rectangular heated bodies mounted in channel surfaces subjected to steady, two-dimensional, incompressible, laminar and forced convective air cooled flows. The problem has two purposes, maximize the heat transfer rate between the bodies and surrounding flow (q) and minimize pressure drop (ΔP) in the channel, i.e., a multi-objective problem. The system is subjected to five constraints, but only two are evaluated here: area fractions of first and second bodies (ϕ1andϕ2). The problem has two degrees of freedom: ratio between the height and length of upward and downward bodies (H1/L1andH2/L2) placed in lower and upper surfaces of the channel, respectively. The influence of fraction areas on the system performance is also investigated. All simulations are performed with constant Reynolds and Prandtl numbers,ReH = 100 andPr = 0.71. As expected, highest intrusion and areas of the bodies were benefical for heat exchange, while the opposite was noticed for pressure drop. For multi-objective optimization, intermediate optimal shapes with assimetric sizes were achieved. The best multiobjective performance is reached for the upward body higher than the downstream one (H1/L1>H2/L2).
机译:当前的数值研究通过结构设计和穷举搜索对安装在通道表面上的两个交替的矩形加热体进行了几何优化,该矩形加热体受到稳定,二维,不可压缩,层流和强制对流空气冷却流的影响。该问题具有两个目的,即最大化物体与周围流之间的传热速率(q)和最小化通道中的压降(ΔP),即多目标问题。该系统受到五个约束,但是这里仅评估两个约束:第一和第二物体的面积分数(ϕ1和ϕ2)。该问题具有两个自由度:分别放置在通道下表面和上表面中的上,下物体的高度与长度之比(H1 / L1和H2 / L2)。还研究了分数区域对系统性能的影响。所有模拟均以恒定的雷诺数和普朗特数进行,ReH = 100和Pr = 0.71。不出所料,对于热交换而言,最大的侵入和主体区域是有益的,而压降则相反。对于多目标优化,获得具有辅助尺寸的中间最优形状。上身高于下身(H1 / L1> H2 / L2),则达到最佳多目标性能。

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