非接触式余弦转子泵及流场数值分析

Numerical Analysis of Non-Contact Cosine Rotor Pump and Flow Field

为研究非接触式余弦转子泵内部流场变化情况,利用Fluent软件中动网格技术、RNGk-ε模型和PISO算法对非接触式余弦转子泵的内部流场进行非定常数值模拟。通过对泵进行模拟,得到了泵内部流场的变化情况,泵内部的压力从出口处到进口处逐渐递减,在转子间隙处出现最小压力;泵腔内速度随着转速的增大而增大,在转子间隙处出现最大返流速度。泵吸液腔中的涡旋随着转子间间隙和出口工作压力的增大而增大,数量也随着增多,致使泵工作效率降低。

In order to study the internal flow field change of the non-contact cosine rotor pump,the internal flow field of the non-contact cosine rotor pump was simulated by using the dynamic grid technique,the RNGk-ε model and the PISO algorithm in the Fluent software.By simulating the pump,the internal flow field of the pump is changed.The pressure inside the pump gradually decreases from the outlet to the inlet,and the minimum pressure occurs at the rotor gap.The speed of the pump chamber increases with the increase of the rotational speed.The maximum return velocity occurs at the rotor gap.The vortex in the pump suction chamber and the number increases with the increase of the inter-rotor gap and the outlet working pressure,which bring about the lower pump working efficiency.