• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>International Journal of Heat and Mass Transfer >Heat transfer enhancement in rectangular channels with axial ribs or porous foam under through flow and impinging jet conditions
【24h】

Heat transfer enhancement in rectangular channels with axial ribs or porous foam under through flow and impinging jet conditions

机译：在通流和冲击射流条件下，带有轴向肋或多孔泡沫的矩形通道中的传热增强

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

Heat transfer and pressure loss characteristics of a high aspect ratio duct are measured under both, jet impingement and channel flow conditions, respectively. For both cases, roughness elements in consideration are staggered and inline axial ribs. The spacing (P) to height (e) ratios studied are P/e = 2 and P/e - 4; the rib height (e) to channel height (H) ratio is 0.125. Also studied is an aluminum foam roughness with a porosity of 92% and a height to channel height ratio of 0.15. Reynolds numbers considered for the channel flow case (based on the hydraulic diameter) range from 10,000 to 40,000. Reynolds numbers for the jet impingement case (based on the hole diameter) range from 5,000 to 20,000. Tests are performed using the copper plate regional average method. Results show a 50-90% increase in heat transfer due to the use of axial ribs in both, impingement and channel flow cases. The porous foam shows a more significant increase in heat transfer coefficient for both channel flow and impingement cases.
机译：高纵横比管道的传热和压力损失特性分别在射流冲击和通道流动条件下进行测量。对于这两种情况，要考虑的粗糙度元素是交错的和轴向轴向肋。所研究的间距（P）与高度（e）之比为P / e = 2和P / e-4；肋骨高度（e）与通道高度（H）之比为0.125。还研究了泡沫铝的粗糙度，其孔隙率为92％，高度与通道的高度比为0.15。考虑到通道流动情况的雷诺数（基于液压直径）范围为10,000到40,000。射流冲击箱的雷诺数（基于孔径）范围为5,000到20,000。使用铜板区域平均法进行测试。结果表明，在冲击和通道流动情况下，由于使用轴向肋，传热增加了50-90％。对于通道流和冲击情况，多孔泡沫均显示出更大的传热系数增加。

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