液力惯容器螺旋管内流场数值模拟

Numerical Simulation of Flow Field in Spiral Tube of Hydraulic Inertial Vessel

采用Fluent建立液力惯容器螺旋管内流场的数值模型,得到螺旋管的速度场和压力场分布。通过建立对照组与6个实验组的数值模型,研究螺旋管相关参数对压差和摩阻系数的影响。结果表明:螺旋管的速度场和压力场均呈C形分布,外侧速度和压力均高于内侧,表明产生了二次流现象;压差与流体速度是正相关,与螺旋管内直径和螺距是负相关,螺旋直径影响较小;摩阻系数与螺旋管内直径是正相关,与流体速度和螺旋直径是负相关,与螺距无关。研究结论为螺旋管式液力惯容器的设计提供了理论依据。

Fluent is used to establish the numerical model of the flow field in the spiral tube of the hydraulic inertial vessel,and the velocity field and pressure field distribution of the spiral tube are obtained.The influence of spiral tube parameters to pressure difference and friction coefficient is studied by establishing numerical models of control group and six experimental groups.The results show that the distribution of the velocity field and pressure field are C-shaped,and the velocity and pressure outside are higher than that inside,indicating that the secondary flow phenomenon is occurred;the pressure difference is positively correlated with the fluid velocity,but negatively correlated with the screw diameter and pitch,and the spiral diameter has little effect.The friction coefficient is positively correlated with the inner diameter of the spiral tube,and is negatively correlated with the fluid velocity and spiral diameter respectively,and the pitch has no effect on the friction coefficient.The research conclusions provide a theoretical basis for the design of the spiral tube hydraulic inertial vessels.