基于数值模拟的特种混流泵水力性能优化与试验  

Hydralic Performance Optimization and Experiment of Special Mixed-flow Pump Based on Numerical Simulation

作　　者：张德胜[1,2] 施卫东[1,2] 潘大志[1] 曹卫东[1,2] 李通通[1] 

机构地区：[1]江苏大学流体机械工程技术研究中心,镇江212013 [2]江苏大学国家水泵及系统工程技术研究中心,镇江212013

出　　处：《机械工程学报》2014年第6期177-184,共8页Journal of Mechanical Engineering

基　　金：国家自然科学基金(51109093);江苏省自然科学基金(BK2011503);江苏省优势学科建设工程资助项目

摘　　要：为研究水泵液压系统混流泵的性能,分析特种混流泵性能参数与系统工作过程物理量的关联性,基于器材水下运动学方程推导混流泵流量、扬程等参数的计算方程,并提出满足器材运动要求的泵性能参数。基于数值模拟和试验并重的研究方法,针对水泵液压系统混流泵开敞式出水结构,优化双圆弧导水结构,数值模拟结果表明双圆弧轴面的过流面积变化均匀,速度场无旋涡等不良流动,减小了装置水力损失。针对混流泵叶轮叶片包角和出口安放角进行优化,获得了陡降的流量-扬程特性曲线,满足了不同工况下器材加速要求。叶轮出口采用非线性环量分布流型,提高了水力效率,试验结果表明优化的开敞式混流泵最高效率达到83.24%,各项性能指标均满足优化设计要求。In order to study mixed flow pump performance in pump hydraulic pressure system,the relevance between pump performance parameters and physical quantities during the system working process is analyzed.The formulas of mixed flow pump design flow rate,head and other parameters are derived successfully based on submerge equipment kinematic equations,and mixed flow pump design parameters are calculated to meet weapon launching requirements.Open discharge structure of pump exit is optimized based on the CFD method,and double arcs in the axial plane are designed to reduce the hydraulic loss.Numerical results show that area of passage in discharge structure with double arcs changes uniformly without vortex region,so the efficiency of pump device is improved because of the good pressure conversion capability.The slope of flow rate-head curve is increased by optimization of the blade wrap angle and blade outlet angle.The head of optimal case is higher in the full flow rate range,which could meet the equipment acceleration requirements at different operating conditions.Blade outlet flow pattern is optimized based on the non-linear circulation distribution,and the hydraulic efficiency is increased.The maximum efficiency of the optimal pump reaches 83.24％,which meets the design requirements.

关 键 词：混流泵 叶轮 开敞式出水结构 数值模拟 优化设计 

分 类 号：TH311[机械工程—机械制造及自动化]