• 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 >Impingement/effusion cooling with a hollow cylinder structure for additive manufacturing
【24h】

Impingement/effusion cooling with a hollow cylinder structure for additive manufacturing

机译：采用空心圆柱结构进行冲击/积水冷却，用于添加制造

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

The aim of this study is to investigate heat transfer characteristics in new laminated plates having impingement/effusion cooling with a hollow cylinder structure. Three perforated plates are set up in parallel position to model impingement/effusion cooling system with a hollow cylinder structure. Local heat/mass transfer coefficients on all surfaces including upper surface of bottom plate, lower surface of mid plate, upper surface of mid plate, and lower surface of top plate in a new structure are obtained using the naphthalene sublimation method. The ratio of channel height to hole diameter, h/D, and the ratio of hole pitch to hole diameter, P/D, are fixed at 0.5 and 6, respectively. The range of the Reynolds number based on the hole diameter is from 2,000 to 7,000. For all tested surfaces, local Sherwood number shows high values near the stagnation region and at the regions where flow acceleration to the effusion hole occurs. A similar trend of the area-averaged Sherwood numbers on all tested surfaces except upper surface of bottom plate appears because of the flow regime variations depending on the Reynolds numbers. The new structure has higher value than existing other multi-layered structures, with an improvement of 32.4% in heat/mass transfer and 24.4% in thermal performance factor at Re_D = 5,000. A correlation between the area-averaged Sherwood number and the Reynolds number is obtained. This proposed structure will improve the thermal durability and reliability of the hot components of gas turbines by being implemented on hot components of gas turbines using an additive manufacturing.
机译：该研究的目的是在具有中空圆柱结构的冲击/积液冷却的新层压板中研究热传递特性。三个穿孔板以平行位置设定，以模拟具有中空圆柱结构的冲击/积液冷却系统。使用萘升华法得到底板上表面的所有表面上的局部热/质量传递系数，包括底板上表面，中间板的下表面，上层的上表面和顶板的下表面。通道高度与孔直径，H / D和孔间距与孔直径，P / D的比率分别固定在0.5和6。基于孔径的雷诺数的范围为2,000至7,000。对于所有测试的表面，本地舍伍德号码在停滞区域附近显示高值，以及发生流动孔的流量加速的区域。由于根据雷诺数的流动调节变化，除了底板上表面之外的所有测试表面上的区域平均舍伍德号的类似趋势。新结构的价值高于现有的其他多层结构，在热/质量传递中提高32.4％，在RE_D = 5,000处的热性能因数24.4％。获得区域平均舍伍德数和雷诺数之间的相关性。该所提出的结构将通过在使用添加剂制造的燃气轮机的热部件上实现来改善燃气轮机热部件的热耐久性和可靠性。

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