立式曲面网板水动力及周围流场数值仿真研究

Numerical Simulation Research of Hydrodynamic Force and Surrounding Flow Field of Vertical Curved Reticular Lamina

该文研究了立式曲面网板在不同冲角下的水动力性能变化情况,并且对网板周围流场可视化及表面压力分布可视化进行了探究.结果表明,当网板雷诺数在5.2×104~9.5×104区间时,升力系数、阻力系数和力矩系数随雷诺数增大基本保持不变,而升力系数和力矩系数随冲角增大呈先增大后减小趋势;阻力系数随冲角增大一直增大.升力系数的试验值和模拟值随冲角增大均呈先增大后减小趋势,阻力系数的试验值和模拟值随冲角增大呈一直增大趋势,升阻比的试验值和模拟值随冲角均呈先增大后减小趋势.CFD结果显示,网板表面压力分布随冲角增大逐渐增大,而网板压力中心随冲角增大基本保持不变.

This paper studies the changes in hydrodynamic performance of the vertical curved reticular lamina at different angles of attack,discusses the differences in the results of the different studies,and visualizes the flow field and surface pressure distribution around the reticular lamina.The results show that when the Reynolds number of the stencil is in the range of 5.2×104 to 9.5×104,the lift coefficient,drag coefficient and torque coefficient remain basically the same as the Reynolds number increases,while the lift coefficient and torque coefficient are first trend decreases after the increase;the drag coefficient increases with the angle of attack.The experimental value and the simulated value of the lift coefficient both increase first and then decrease as the angle of attack increases.The experimental and simulated values of drag coefficient have been increasing with increasing angle of attack.The experimental and simulated values of liftto-drag ratio increase first and then decrease with the angle of attack.The CFD results show that the pressure distribution on the surface of the stencil gradually increases with increasing angle of attack,while the pressure center of the stencil basically remains unchanged as the angle of attack increases.