新型多级泵叶轮-导叶耦合流场结构与能量转换机理研究

项目名称： 新型多级泵叶轮-导叶耦合流场结构与能量转换机理研究

项目编号： No.51279069

项目类型： 面上项目

立项/批准年度： 2013

项目学科： 水利工程

项目作者： 施卫东

作者单位： 江苏大学

项目金额： 80万元

中文摘要： 多级泵是提供高扬程、高压力液体的关键设备，研究多级泵内部流场结构和能量转换机理，对于提高多级泵水力效率，推进节能减排战略具有重要意义。本项目对具有节能节材特性的新型多级泵进行研究，结合大涡模拟、PIV测量和高精度压力测量，采用平行矢量法研究新型多级泵内部流体质点涡运动轨迹，获得不同流面环量、涡量分布特征，揭示叶轮-导叶耦合流场空间旋涡运动规律，建立通过边界涡量流和拟涡能表征流动结构的诊断方法。采用涡量矩理论和有限域理论，分析叶轮-导叶几何参数对叶轮叶片载荷和水力效率的影响规律。基于多学科优化建立叶轮-导叶几何参数与能量转换特性的映射关系，探寻斜切式叶轮斜切量与三维曲面反导叶进口曲面形状的匹配关系。本项目旨在研究新型多级泵叶轮-导叶耦合流场的结构特征并建立诊断方法，揭示新型多级泵内部能量转换机理，为完善新型多级泵设计方法提供理论基础。

中文关键词： 多级泵；能量转换；叶轮；涡量场；

英文摘要： Multistage pump is the critical equipment to provide high-head and high-pressure liquid. Studying the multistage pump internal flow structure and energy conversion mechanism has great significance for improving the multistage pump hydraulic efficiency, as well as for promoting the energy conservation and emission reduction strategies. This project studies the new type multistage pump, which has the energy and material saving characteristics. By combining with large-eddy simulation, PIV measurement and high accuracy pressure measurement, the parallel vector method is used to research the internal fluid particle vortex trajectory of new type multistage pump. In order to obtain the vorticity distribution characteristics on different flow surface and reveal the impeller-diffuser coupling vortex motion law, the vortex diagnostic method is established by characterizing the flow structure through boundary vorticity flow and enstrophy. Vorticity moment theory and finite field theory are used to analyze the impact of geometry parameters of impeller-diffuser on impeller blade loads and hydraulic efficiency. The relationship between the geometry parameters of impeller-diffuser and energy conversion characteristics and the matching relations are established based on the multi-disciplinary optimization method. The project a

英文关键词： Multi-stage pump；Energy transfer；Impeller；Vortex feild；