旋涡风机叶片侧边型线的研究

旋涡风机叶轮叶片侧边型线影响流体进出叶轮流道的速度三角形,对风机的性能有一定的影响。本文从试验和数值计算的角度对径向直叶片侧边倒角情况进行了研究,发现叶片侧边吸力面倒角比压力面倒角更能提高风机的性能,小流量区更为明显。本文用理论分析了该现象的原因,并推断前弯和后弯叶片也具有同样的性质。

Research on the Shape of Blade Side of Vortex Blower

The shape of impeller blade side of vortex blower can influence velocity triangle of fluid flowing in and out of impeller,so as to influence the performance of blower.The chamfer of radial side blade was studied by using methods of experiment and numerical simulation,and It finds that chamfer on the suction side is the best situation for improving the performance of vortex blower,especially when little flux.The paper explains the roots of such phenomenon by theoretical analysis,and deduces that forward and backward bending blades own the same properties.