一种轴流泵叶顶间隙泄漏涡空化的数值模拟方法

• Format: Patent
• Language: Chinese
• Published: 15.12.2020
• Subjects: CALCULATING; COMPUTING; COUNTING; ELECTRIC DIGITAL DATA PROCESSING; IMAGE DATA PROCESSING OR GENERATION, IN GENERAL; PHYSICS

本发明公开了一种轴流泵叶顶间隙泄漏涡空化的数值模拟方法，通过对轴流泵三维几何建模、划分计算网格以及建立空化流动计算流体动力学模型，采用基于涡判别方法修正的空化模型对轴流泵空化流场进行数值计算，分析获得轴流泵空化性能及叶顶间隙泄漏涡空化流动特性。本方法充分考虑旋涡流动对空化相变过程的影响，提高了涡空化数值计算结果可信度，实现了对轴流泵叶顶间隙泄漏涡空化快速、高精度的数值预测，有助于对轴流泵叶顶间隙泄漏涡空化的流动机理及抑制措施研究奠定良好的数理基础，同时也可推广应用于混流泵、水轮机等其他叶片式水力机械叶顶间隙泄漏涡空化的数值模拟研究。 The invention discloses a numerical simulation method for axial flow pump blade tip gap leakage vortex cavitation. An axial flow pump cavitation flow field is subjected to numerical calculation by performing three-dimensional geometric modeling on the axial flow pump, dividing calculation grids and establishing a cavitation flow calculation fluid dynamics model and adopting a cavitation model corrected based on a vortex discrimination method, and the cavitation performance of the axial flow pump and the blade top gap leakage vortex cavitation flow characteristic are obtained through analysis.According to the method, the influence of vortex flow on the cavitation phase change process is fully considered, the reliability of a vortex cavitation nu