...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of Thermal Science and Engineering Applications: Transactions of the ASME >Comparison of Film Effectiveness and Cooling Uniformity of Conical and Cylindrical-Shaped Film Hole With Coolant-Exit Temperature Correction
【24h】

Comparison of Film Effectiveness and Cooling Uniformity of Conical and Cylindrical-Shaped Film Hole With Coolant-Exit Temperature Correction

机译：冷却液 - 出口温度校正的锥形和圆柱形薄膜孔的膜效果和冷却均匀性的比较

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

Data from conical-shaped film cooling holes are extremely sparse in open literature, especially the cooling uniformity characteristic, an important criterion for evaluating any film cooling design. The authors will compare the performance of conical-shaped holes to cylindrical-shaped holes. Cylindrical-shaped holes are often considered a baseline in terms of film cooling effectiveness and cooling uniformity coefficient. The authors will study two coupons with conical-shaped holes, which have 3° and 6° diffusion angles, named CONS and CON6, respectively. A conjugate heat transfer computational fluid dynamics model and an experimental wind tunnel will be used to study these coupons. The three configurations: cylindrical baseline, CON3, and CON6, have a single row of holes with an inlet metering diameter of 3 mm, length-to-nominal diameter of 4.3, and an injection angle of 30°. In this study, the authors will also take into account the heat transfer into the coolant flow from the coolant channel. In other words, the coolant temperature at the exit of the coolant hole will be different than that measured at the inlet, and the conjugate heat transfer model will be used to correct for this difference. For the numerical model, the realizable k-s turbulent model will be applied with a second order of discretization and an enhanced wall treatment to provide the highest accuracy available. Grid independent studies for both cylindrical-shaped film cooling holes and conical-shaped holes will be performed, and the results will be compared to data in open literature as well as in-house experimental data. Results show that conical-shaped holes considerably outperform cylindrical-shaped holes in film cooling effectiveness at all blowing ratios. In terms of cooling uniformity, conical-shaped holes perform better than cylindrical-shaped holes for low- and midrange blowing ratios, but not at higher levels.
机译：来自圆锥形薄膜冷却孔的数据在开放文献中非常稀疏，尤其是冷却均匀特性，是评估任何薄膜冷却设计的重要标准。作者将比较圆锥形孔对圆柱形孔的性能。圆柱形孔通常被认为是薄膜冷却效果和冷却均匀系数方面的基线。作者将研究两个具有圆锥形孔的优惠券，分别具有3°和6°扩散角，命名为CON和CON6。共轭传热计算流体动力学模型和实验风洞将用于研究这些优惠券。三种配置：圆柱形基线，CON3和CON6，具有单行的孔，入口计量直径为3mm，长度为4.3的注射角度为30°。在这项研究中，作者还将考虑到从冷却剂通道的热传递到冷却剂流中。换句话说，冷却剂孔出口处的冷却剂温度将与入口处的测量的冷却剂温度不同，并且缀合物传热模型将用于校正这种差异。对于数值模型，可实现的K-S湍流模型将以二阶离散化和增强的壁处理应用，以提供最高的可用精度。将进行对圆柱形薄膜冷却孔和圆锥形孔的网格独立研究，结果将与开放文献中的数据进行比较，以及内部实验数据。结果表明，圆锥形孔在所有吹气比上以薄膜冷却效果的圆柱形孔相当偏高。在冷却均匀性方面，圆锥形孔比圆柱形孔更好地执行，用于低和中端吹出比例，但不是更高的水平。

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