...
  • 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 >Effects of hole shape on impingement jet array heat transfer with small-scale, target surface triangle roughness
【24h】

Effects of hole shape on impingement jet array heat transfer with small-scale, target surface triangle roughness

机译：孔形状对小尺寸目标表面三角形粗糙度的冲击射流阵列传热的影响

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

Considered is the addition of special surface roughness patterns to impingement target surfaces to improve the effectiveness and surface heat transfer augmentation levels of impingement cooling. Three different impingement hole shapes are employed within a jet array: circle, racetrack, and triangle. These are designed so that all three hole shapes have the same hydraulic diameter. Different sizes, different shapes, and different distributions of surface roughness elements are utilized, including arrays of small triangle roughness, with different roughness heights, employed with and without the addition of large pin roughness elements. Data are presented for impingement jet Reynolds numbers of 900, 1500, 5000, and 11,000. Overall, the racetrack hole configuration generally provides approximately the same heat transfer augmentation as the circle hole configuration, with slightly better performance, under some conditions. The triangle hole configuration provides lower heat transfer augmentation, compared to both the circle hole and racetrack hole configurations. The addition of small triangle roughness to the target plates shows an increase in heat transfer augmentation, compared to the baseline target plate, for both the circle and racetrack hole configurations. For the triangle hole configuration, the addition of small triangle roughness generally shows negligible or negative improvement, compared to the baseline target plate. Also illustrated is significantly different Reynolds number dependence for impingement cooling, as hole shape changes from circle to racetrack, and triangle. (C) 2018 Elsevier Ltd. All rights reserved.
机译：考虑向冲击目标表面添加特殊的表面粗糙度图案，以提高冲击冷却的有效性和表面传热增强水平。射流阵列中采用了三种不同的撞击孔形状：圆形，跑道和三角形。它们的设计使所有三个孔的形状都具有相同的液压直径。使用了不同尺寸，不同形状和不同表面粗糙度元件，包括在增加或不增加大销钉粗糙度元件的情况下采用的，具有不同粗糙度高度的小三角形粗糙度的阵列。给出了900、1500、5000和11,000的冲击射流雷诺数的数据。总体而言，在某些情况下，跑道孔的配置通常会提供与圆孔配置大致相同的传热增强功能，但性能略好。与圆形孔和跑道孔配置相比，三角形孔配置提供的传热增加较低。对于圆形和跑道孔配置，与基准目标板相比，向目标板添加小三角形粗糙度会增加传热的增加。对于三角形孔配置，与基线目标板相比，增加小的三角形粗糙度通常显示微不足道的或负面的改善。还显示了当孔的形状从圆形变为跑道形和三角形时，冲击冷却的雷诺数依赖性显着不同。 （C）2018 Elsevier Ltd.保留所有权利。

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