流动环境中高浓度射流扩散实验研究

Experimental Investigations on Diffusion Characteristics of High Concentration Jets in Environmental Currents

通过流动显示和定量测量对浅水流动环境条件下 ,高浓度流体垂体向抛射入水后形成的射流运动扩散及浓度分布特征进行了水槽实验研究· 实验分析了射流入水后与环境水流条件的相互作用 ,通过数据分析给出了射流中心线着底点与横向扩散角的拟合公式· 实验结果表明高浓度射流在近区呈现出不同于一般淹没射流的复杂流动形态及扩散特征 。

By means of flow visualization and quantitative measurement,the diffusion pattern and concentration distribution characteristics of high concentration jets vertically discharged into shallow moving waterbody were experimentally investigated in water channel.The interactions between the high concentration jets and environmental flow conditions were analysed,and the formulae of impinging point coordinate and transverse spread angle are gained from data analysis.Experimental results indicate that the jets show complicated flow patterns and diffusion characteristics in near region, which are different from common submerged jets, and spread downstream in the manner of density currents.