...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of hydraulic research >Offset height effect on turbulent characteristics of twin surface jets
【24h】

Offset height effect on turbulent characteristics of twin surface jets

机译：对双面喷射湍流特性的偏移高度效应

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 characteristics of square twin surface jets at various offset heights from the free surface were studied using a particle image velocimetry technique. The offset heights were varied from 1 to 4 nozzle widths at a fixed Reynolds number of 3890. The entrainment and mixing characteristics were examined using the potential core length, merging point, combined point, maximum velocity decay, half-velocity width and were found be nearly independent of offset height in near field. The jet-surface interaction was examined by surface velocity, vorticity thickness and surface turbulence intensities. The growth rate of the vorticity thickness reduced in the interaction region; and was more severe for shorter offset height. Turbulent structures were examined using weighted joint probability density function and two-point cross-correlations between swirling strength and velocity fluctuations. Weaker turbulent events were observed for deeper jet close to a free surface at the streamwise location beyond the attachment point.
机译：使用粒子图像速度技术研究了来自自由表面的各种偏移高度的方形双面喷射的特性。偏移高度在固定的雷诺数为3890的固定雷诺数而变化。使用潜在的核心长度，合并点，组合点，最大速度衰减，半速度宽度和发现，检查夹带和混合特性几乎与近场偏移高度无关。通过表面速度，涡旋厚度和表面湍流强度检查喷射表面相互作用。互动区域中涡旋厚度的生长速率降低;对于较短的抵消高度来说更严重。使用加权关节概率密度函数和旋转强度和速度波动之间的两点交叉相关检查湍流结构。观察到较弱的湍流事件，用于靠近附接点的流动位置的自由表面靠近自由表面。

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