倾斜水射流冲击移动平板的流动分析

Analysis of the flow properties on a moving flat plate impinged by an inclined water jet flow

该文采用雷诺应力湍流模型(RSM)和Simplec算法对倾斜冲击淹没射流下移动平板表面的流动特性进行数值分析,得到了不同入口雷诺数、入射角度和不同平板移动速度下平板表面流场的流函数分布和平板近壁面湍动能分布。研究结果表明,斜射流下冲击点下坡侧产生了旋涡区,此旋涡随板速的提高而被压缩,其中心逐渐向射流中心区靠近。此外,相同条件下滞止点处的近壁湍动能最大,湍动能峰值位置随平板的移动而同向移动,并随入射角的降低而远离射流的几何中心。

By using the Reynolds Stress Model and Simplec algorithm, a moving flat plate impinged by a submerged inclined turbulent jet flow with the configuration of its flow field is analyzed by numerical method to obtain the distributions of stream function and near wall turbulence kinetic energy under different jet Reynolds numbers, jet angles and plate speeds. The results reveal that a recirculation rises close to the plate surface at the downstream side. The recirculation is compressed with the increasing plate speed and its center moves close to the jet center. Besides, near wall turbulence kinetic energy reaches a maximum at stagnation point under same conditions. The location of the maximal turbulence kinetic energy moves with the same direction of the moving plate and the peak gradually away from the geometric center by decreasing the jet angle at same plate speed.