摘要
针对传统的低比转速混流泵设计中对叶型径向参数变化规律研究不足的情况,提出了借鉴汽轮机轴流式叶片设计经验的方法.首先依据内流损失理论,分析了叶轮流道过流断面二次流形成的原因,再应用先进控制流理论,找到了削弱二次流的方法,然后在对叶片参数化建模的基础上,利用商用CFD软件NUMECA实现了叶型径向参数的优化设计,使泵效率有较大提高.实例计算表明,先进控制流理论是将内流分析与优化设计结合起来的有效方法,能够实现叶轮的快速高效设计.
To overcome the condition that there is short of work over rule of variation about radial parameters in allusion to traditional low specific speed mixed-flow pump impeller design,a novel strategy using for reference of steam turbine axial flow impeller design experience is proposed.In the first instance,according to inner flow loss theory,the reason engendering secondary flow in impeller flow path passage section was clarified.Subsequently,a new method degrading secondary flow was discovered by advanced control-flow theory.And then,radial parameters optimization design was achieved by NUMECA,a commercial CFD software on the condition of the vane parametric modeling.It can increase pump efficiency effectively.The calculation case shows that advanced control-flow theory is an valid method to integrate inner flow analyzing and optimization design,and it can achieve impeller quickly and with high efficiency design.
出处
《排灌机械工程学报》
EI
2010年第2期98-102,共5页
Journal of Drainage and Irrigation Machinery Engineering
基金
国家自然科学基金资助项目(50579083)
关键词
混流泵
低比转速
优化设计
先进控制流
数值模拟
mixed-flow pump
low specific speed
optimization design
advanced control-flow
numerical simulation
