Turbulence properties of a vertical round jet in a wavy-crossflow environment
Turbulence properties of a vertical round jet in a wavy-crossflow environment
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DOI：
10.1016/j.oceaneng.2023.116040
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发表时间：
2023-11
影响因子：
5
通讯作者：
Yuhang Chen;Zhenshan Xu;Yongping Chen;E. Otoo;Zhihua Xie
中科院分区：
文献类型：
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作者：
Yuhang Chen;Zhenshan Xu;Yongping Chen;E. Otoo;Zhihua Xie
废水排入沿海沃茨可简化为波浪和水流作用下的紊流射流。采用改进的粒子图像测速技术（PIV）对波横流环境下垂直圆射流的瞬态流场进行了实验研究。相平均流线被发现是最混乱的波谷阶段。脉动湍流动能的时间变化进行了探讨。结果表明，波动湍流动能跨波相，特别是在远场缺乏独特的模式。这表明，波相位影响射流宽度膨胀，特别是在远场。湍流动能的空间变化进行了检查，横流和波周期也被认为是。结果表明，将相对波轨速度减小到横流速度Rw，可增强波横流射流近区的最大湍动能。
The discharge of wastewater into coastal waters can be simplified as a turbulent jet under waves and currents. A laboratory study has been carried out to measure the instantaneous flow field of a vertical round jet under wavy-crossflow environment using an improved particle image velocimetry (PIV) technique. The phase-averaged streamlines are found to be the most chaotic at the wave trough phase. Temporal variation in fluctuating turbulent kinetic energy is explored. Results indicate a lack of distinctive patterns in fluctuation turbulent kinetic energy across wave phases, particularly in far field. This suggests that wave phases marginally affect jet width expansion, especially in the far field. Spatial variations in turbulent kinetic energy are examined and crossflow and wave period are also considered. It is found that decreasing relative wave-orbital velocity to crossflow velocityRwcenhances maximum turbulent kinetic energy in the near field of the wavy-crossflow jet.