• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Experiments in Fluids: Experimental Methods and Their Applications to Fluid Flow >Particle image velocimetry measurements of flow field behind a circular square-edged orifice in a round pipe
【24h】

Particle image velocimetry measurements of flow field behind a circular square-edged orifice in a round pipe

机译：圆管圆形方孔后的流场的粒子图像测速法测量

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

In this paper, we use a planar particle image velocimetry system to measure the flow field downstream of a circular square-edged orifice plate in a round pipe. The flow field is a fully developed pipe flow well upstream of the orifice plate. The Reynolds number based on pipe diameter and cross-sectional mean velocity is in the range of 25,000-55,000. We present detailed mean and turbulent fields and investigate similarities and differences with other separated flows. A noteworthy difference is the formation of a vena contracta behind the orifice at a distance of approximately one pipe radius. Upstream of the vena contracta, the properties of the shear layers in the orifice flow are quite similar to those of other separated flows. However, because the shear layer in the orifice flow begins to merge at a distance of approximately one pipe diameter, it is significantly different from the shear layers in other separated flows. Finally, we assess the reliability of the Reynolds stress model to represent orifice flows by comparing numerical results with experimental results.
机译：在本文中，我们使用平面粒子图像测速系统来测量圆管中圆形方形孔板下游的流场。流场是孔板上游完全发育的管道流。基于管道直径和横截面平均速度的雷诺数在25,000-55,000范围内。我们提出了详细的均值和湍流场，并研究了与其他分离流动的异同。值得注意的区别是在孔后约一个管道半径处形成了腔静脉收缩。在腔收缩的上游，孔流中剪切层的性质与其他分离流的性质非常相似。但是，由于孔流中的剪切层在大约一个管道直径的距离处开始合并，因此与其他分离流中的剪切层明显不同。最后，通过将数值结果与实验结果进行比较，我们评估了雷诺应力模型代表孔流的可靠性。

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