Near-field dilution of a turbulent jet discharged into coastal waters: Effect of regular waves
Near-field dilution of a turbulent jet discharged into coastal waters: Effect of regular waves
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排入沿海水域的湍流射流的近场稀释：规则波浪的影响
DOI：
10.1016/j.oceaneng.2017.05.003
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发表时间：
2017-08
影响因子：
5
通讯作者：
C.K. Zhang
中科院分区：
文献类型：
--
作者：
Z.S. Xu;Y.P. Chen;Y.N. Wang;C.K. Zhang
研究了波随流环境中规则波对垂直圆射流三维标量结构的影响。波浪效应用两个无量纲参数表示，即波流速度比Rw c和Strouhal数St。采用大涡模拟方法计算了13种随流环境和1种纯流环境下的射流浓度分布，并通过实验数据进行了验证。结果表明，独特的“流出云”现象的特征，即流出云的大小和相邻流出云之间的距离，强烈依赖于RwcandSt。结果表明，在横截面上，时均浓度分布具有不同的结构，可分为单峰型、双峰型和三峰型三种类型。浓度等值线C =0.25Cm的面积（其中C是时间平均的横截面最大浓度）被定义为代表射流稀释特性的射流可视面积。它突出了存在一个最佳的波流速度比（约0.6在这里）的射流在波后流环境中的最高稀释度，这为选择废水或盐水排放项目的网站提供了有用的指导方针。
The effect of regular waves on three-dimensional scalar structures of a vertical round jet in the wave-following-current environment is investigated. The wave effect is represented by two dimensionless parameters, i.e. the wave-to-current velocity ratioRwcand Strouhal numberSt. The jet concentration distribution, including 13 cases in the wave-following-current environment and 1 case in the current-only environment, is obtained using the large eddy simulation method and validated by experimental data. The results show that the characteristics of the distinctive ‘effluent clouds’ phenomenon, namely the effluent cloud size and the distance between adjacent effluent clouds, are strongly dependent onRwcandSt. As a result, different structures of the time-averaged concentration distribution are found in the transverse planes, and they are classified into three types: one-peak type, two-peak type, and three-peak type. The area of the concentration contour ofC=0.25Cm, whereCmis the time-averaged cross-sectional maximum concentration, is defined as the jet visual area that represents the jet dilution characteristic. It highlights the existence of an optimal wave-to-current velocity ratio (approximately 0.6 here) for the highest dilution of a jet in the wave-following-current environment, which provides useful guidelines for selecting the sites of wastewater or brine discharge projects.
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影响因子：
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作者：
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