喷水推进混流泵流体动力性能的CFD研究

采用CFD方法研究KaMeWa公司的某型喷水推进混流泵的流体动力性能,并分析其内部流场特性。通过几何建模,将泵划分为进口、叶轮、导叶体和喷口四部分。分别采用结构化网格离散计算区域。应用k-ε和k-ω相结合的SST湍流模型封闭控制方程,采用全隐式多区域网格耦合求解。预报其功率、扬程、效率等特性,将泵功率的计算结果与该泵厂家试验数据进行比较,误差在2%以内。说明本研究采用的CFD方法预报该泵的流体动力性能真实可信。根据计算结果,对内流场的流线和叶片表面的压力分布做了详细分析。

Hydrodynamic Performance of the Jet Propulsion Mixed-flow Pump by CFD Simulation

CFD simucation is used to predict the hydrodynamic performance of the mixed-flow pump with waterjet propulsion made by KaMeWa, and the flow inside the pump is analyzed. The calculation region is divided into four parts including inlet, impeller, stator and nozzle, and meshed by the structure grid. The Shear Stress Transport turbulent equation which combined k -ε and k -ω turbulent model, and the multiple reference frame models are used to solve the governing equations. CFD is considered feasible to predict the performance of waterjet mixed-flow pump after comparing the computing results with the test data whose error is less than 2% .The streamline in flow field and pressure distribution on the blade of the waterjet pump are analyzed based on the computational results in detail.