...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>JSME International Journal. Series B, Fluids and Thermal Engineering >Drag Reduction for D-Shape and I-Shape Cylinders: Aerodynamic Mechanism of Reduction of Drag
【24h】

Drag Reduction for D-Shape and I-Shape Cylinders: Aerodynamic Mechanism of Reduction of Drag

机译：D型和I型气缸的减阻：减阻的气动机理

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 aerodynamic mechanisms for the reduction of drag for a D-shape cylinder, wherein a front face of a circular cylinder is cut off, and an I-shape cylinder, wherein front and rear faces are cut off, are investigated. For the D-shape and I-shape cylinders with a cutting angle of 50-53° and for Reynolds number Re > 2.3 x 10~4, the shear layer separated from the front edge reattaches on the circular arc of the cylinder, and a transition in the boundary layer as well as turbulent separation occur. As a result, the wake width decreases and the vortex formation region goes downstream. The Strouhal number increases beyond 0.28, the base pressure coefficient rises, and the drag coefficient of the cylinders decreases to half the value for a circular cylinder. The conditions of the above phenomena are clarified.
机译：研究了用于减小D形圆柱体的阻力的空气动力学机制，其中D形圆柱体的前表面被切掉，而I形圆柱体的前表面和后表面被切掉。对于切割角为50-53°的D形和I形圆柱体，并且雷诺数Re> 2.3 x 10〜4，从前边缘分离的剪切层重新附着在圆柱体的圆弧上，并且边界层发生过渡，并发生湍流分离。结果，尾流宽度减小并且涡流形成区域向下游延伸。斯特劳哈尔数增加到超过0.28，基本压力系数增加，圆柱的阻力系数减小到圆柱值的一半。澄清了上述现象的条件。

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