转套式配流系统三角减振槽结构及其对流场影响
Triangular Damping Groove Structure and its Influence on Flow Field for Rotating Sleeve Distributing-flow System

针对转套式配流系统在高低压转换时存在的冲击、噪声等问题，提出一种三角形截面减振槽结构。根据配流系统的结构特点，建立减振槽数学模型，分析减振槽在不同阶段的通流面积；并对配流系统全流场进行数值分析与可视化研究，分析减振槽对流量脉动、泵腔压力、速度矢量的影响规律。结果表明：三角形截面减振槽结构流场流态为湍流，流场流速较大、流向紊乱，对流量脉动影响较严重，出现流量冲击和回流现象，但很大程度上降低了压力脉动，对压力场具有良好的稳定作用。
Aiming at the problems of shock and noise existing in the transforming moment between high and low pressure areas, a novel triangular uniform-section damping groove is proposed. First, The mathematical modeling of flow characteristic about the damping grooves is established and orifice area is simulated in different stages based on structural characteristic of rotating-sleeve distributing-flow system. Then, flow pulsation, pump chamber pressure and velocity vector are analyzed in sight of numerical analysis and visualization research with full flow field, respectively. The results show that the triangular damping groove flow regime of flow flied is turbulent flow. In addition, triangular damping groove has serious flow pulsation, large flow velocity and disordered flow direction resulting in flow impact and backflow, but stable pressure caused by flow backward is beneficial to pressure pulsation and pressure flied