保定市双吸泵厂

空化现象一直以来是离心泵面临的一个难题，空化会使泵的性能下降、腐蚀破坏过流部件、产生振动和噪声等，严重时泵将不能运行[1]。 因此有必要对离心泵汽蚀时的汽-液两相流进行深入研究。

Cavitation has always been a difficult problem for centrifugal pumps. Cavitation can reduce the performance of the pump, destroy the overcurrent components, produce vibration and noise, and the pump will not run [1] when it is serious. Therefore, it is necessary to further study the vapor-liquid two-phase flow during centrifugal pump cavitation.

基于经验的传统叶轮设计需要繁琐的模型试验，大大增加了设计成本和设计周期，制约了离心泵高空化性能优化设计的进一步发展[2] 。随着计算流体动力学( CFD) 技术在水力机械内部流场计算中应用日益广泛，CFD成为优化设计的重要工具。长期以来，国内外学者采用数值模拟的方法对水泵内部空化流动进行了很多研究[5,6]，并成功预测了空化临界点[7,8,9]和离心泵叶轮内发生的多区域空化流动现象等[10,11]。如Medvitz等[12]捕捉到了离心泵在偏流量工况的能量和扬程下降特性，Coutier Delgosha等[13]采用正压状态方程对3台离心泵进行定常空化流动计算，成功获取了流水槽模具 u型槽模具 电缆槽模具 隔离墩钢模具 护坡砖模具 钢制闸门 螺杆式启闭机 卷扬式启闭机泵的扬程下降曲线及空泡结构。

The traditional design of the traditional impeller based on experience needs tedious model test, which greatly increases the design cost and design cycle, which restricts the further development of the optimization design of the high altitude performance of the centrifugal pump [2]. As computational fluid dynamics (CFD) technology is applied more and more widely in the computation of internal flow field of hydraulic machinery, CFD has become an important tool for optimization design. For a long time, many domestic and foreign scholars have studied the cavitation flow inside the pump by numerical simulation methods, and have successfully predicted the [10,11] of the cavitation critical point [7,8,9] and the multi area cavitation flow phenomenon in the impeller of the centrifugal pump. [12], such as Medvitz and so on, captured the energy and head drop characteristic of the centrifugal pump in the partial flow condition, and the [13] of Coutier Delgosha and so on uses the positive pressure state equation to calculate the constant cavitation flow of the 3 centrifugal pumps, and successfully obtained the head drop curve and the vacuole structure of the pump.