排灌机械工程学报2011，Vol.29Issue(4)：277-281,302,6.DOI:10.3969/j.issn.1674-8530.2011.04.001
混流泵叶轮设计正反问题迭代方法
Iteration method of direct inverse problem of mixed-flow pump impeller design
摘要
Abstract
The meridional flow field inside a mixed-flow pump was obtained by employing iterative cal culation to settle the continuity and motion equations of fluid, based on the flow theory of two families of relative stream surfaces. Thus, the direct problem calculation was achieved. The inverse problem of mixed-flow pump was solved by firstly employing point-by-point integration method to draw the blade shape, secondly thickening the blade on the meridional surface and finally smoothing the leading edge of the blade by conformal mapping. On the base of this, the iterative design method of direct and in verse problems of the mixed-flow pump impeller was developed by combining the direct problem with the inverse problem. In this design method, the direct problem calculation offered the flow field infor mation to the inverse problem design and the inverse problem design provided the impeller model to the direct problem calculation. The impeller was not finally determined until the direct and inverse prob lems converged. The results showed that the impeller, obtained by iterative design method of direct and inverse problems, has more uniform load distribution and higher hydraulic efficiency. This iterative design method can effectively cover the shortage of the traditional method, which is that the meridional flow calculation can only satisfy the continuity equation of fluid when designing the blade. In addition, this method can also consider the effect of blade shape on the meridional flow calculation. Therefore,the finally determined blade shape, obtained in the condition of satisfying both the continuity and mo tion equations of fluid, can not only enhance the accuracy of design calculation, but also provide a platform for further research of optimization design of the mixed-flow pump impeller.关键词
混流泵/叶轮/设计方法/正问题/反问题/迭代计算Key words
mixed-flow pump/impeller/design method /direct problem/inverse problem/ iterative calculation分类
农业科技引用本文复制引用
邴浩,曹树良,谭磊..混流泵叶轮设计正反问题迭代方法[J].排灌机械工程学报,2011,29(4):277-281,302,6.基金项目
国家863计划项目(2008AA05Z201) （2008AA05Z201）
水沙科学与水利水电工程国家重点实验室统筹研究课题(2009T3) （2009T3）
