• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Experimental Thermal and Fluid Science: International Journal of Experimental Heat Transfer, Thermodynamics, and Fluid Mechanics >Effects of axial rectangular groove on turbulent Taylor-Couette flow from analysis of experimental data
【24h】

Effects of axial rectangular groove on turbulent Taylor-Couette flow from analysis of experimental data

机译：轴向矩形槽对实验数据分析湍流泰勒 - 汤流的影响

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

The effects of the number of surface grooves on the hydraulic resistance are experimentally investigated in the case of fully turbulent Taylor-Couette flow at a fixed radius ratio eta = 0.9375 and for Reynolds numbers Rei from 2 x 10(4) to 13 x 10(4). Three configurations of inner cylinder having 6,12 and 24 grooves of the same rectangular shape and regularly distributed are compared to a reference smooth cylinder case. Such configurations are common in electric motors of high power density and of very high rotation rate, for which better understanding and knowledge of the flow patterns and aerodynamic losses are essential to enhance their design and to develop appropriate cooling systems. Torque and pointwise velocity measurements are performed. The effects of the flow modulations induced by the grooves on the friction coefficient and the flow features are examined. The results show significant difference in the average flow pattern, the presence of the grooves suppressing the Taylor Vortices. An increase of the friction coefficient with the groove number is reported. However, the individual drag-increasing contribution of each groove is reduced when increasing the groove number. It is also found that the local scaling exponent of the friction coefficient as a function of the Reynolds number is insensitive to the present surface roughness, suggesting that the bulk flow contribution is similar for all the four configurations.
机译：在固定半径比Eta = 0.9375处的完全湍流泰勒 - 圆锥流动的情况下，实验研究了表面槽的数量对液压阻力的效果。从2×10（4）至13×10（ 4）。将具有6,12和24个凹槽的内筒的三个配置与相同的矩形和定期分布式进行比较，与参考平滑气缸壳进行比较。这种配置在高功率密度和非常高的旋转速率的电动机中常见，从而更好地理解和对流动模式和空气动力损失的知识对于增强它们的设计并开发适当的冷却系统是必不可少的。进行扭矩和尖速度测量。通过凹槽引起的流动调制对摩擦系数的影响和流量特征。结果显示了平均流动模式的显着差异，凹槽的存在抑制泰勒涡流。报道了具有凹槽数的摩擦系数的增加。然而，当增加凹槽数时，每个凹槽的各个拖延的贡献减小。还发现，作为雷诺数的函数的局部缩放指数对雷诺数的函数对本表面粗糙度不敏感，表明散装流量贡献类似于所有四种配置。

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