• 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 >Experimental study on evolution of joint velocity PDF in planar mixing layer
【24h】

Experimental study on evolution of joint velocity PDF in planar mixing layer

机译：平面混合层中联合速度PDF演化的实验研究

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

A turbulent mixing layer develops along stream wise direction through successively distinct regions, namely the near-field and self-preserving regions. Its flow field is composed of two different flow types, namely a shear layer and two outer free stream regions. The (stream wise) evolution from the near-field region to the self-preserving region and the (transverse) evolution from the shear layer to the two free stream sides in the mixing layer are experimentally investigated by using the information of joint probability density function (PDF) of velocity fields under the two flow conditions of (Re. _?= U_H· ?_0/. ?= 1100, r= (U_H-U_L)/(U_H+. U_L) = 0.72) and (370,. 0.39), respectively. It is demonstrated that the transition from the near-field region to the self-preserving region can be precisely monitored through the stream wise variation of the inclined angle of the joint PDF distribution at the position of ?= 0 where its mean stream wise velocity is equal to half of the sum of the high- and low-speed free stream velocities. In contrast, the transition from the shear layer to the two outer free stream regions can be monitored through the transverse variation of the roundness of the joint PDF distribution.
机译：湍流混合层沿水流方向穿过相继不同的区域，即近场区域和自保持区域，发展。它的流场由两种不同的流类型组成，即剪切层和两个外部自由流区域。利用联合概率密度函数的信息，对从近场区域到自保持区域的（河流方向）演化以及混合层中从剪切层到两个自由流侧的（横向）演化进行了实验研究。 （Re。 ）， 分别。证明了通过在平均流向速度为π= 0的位置处联合PDF分布的倾斜角的流向变化可以精确地监视从近场区域到自保留区域的过渡。等于高速和低速自由流速度总和的一半。相反，可以通过联合PDF分布的圆度的横向变化来监视从剪切层到两个外部自由流区域的过渡。

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