摘要
本文建立了能够控制双向流动性能的水泵水轮机在线优化设计模型。模型中采用全三维反问题方法设计转轮叶片,采用叶型逼近方法求解水轮机工况和水泵工况的流场。综合考虑双向流动的能量性能和空化性能,提出了综合性能评价函数。采用单纯形加速方法,对一高水头水泵水轮机进行优化设计,得到了综合流动性能较好的转轮。全流道的定常湍流计算结果表明,优化后两个流动方向的转轮效率都提高,空化系数降低,证明了优化方法是可行的。模型可以实现计算机的在线优化计算,减少了人工干预。
In this paper a model for on-line optimum design is established to control the bidirectional flow performance of pump-turbine, including a full 3D inverse method for the design of runner＇ s blades, a method of blade shape approximation to obtain the flow fields at the turbine and pump modes, and a function for comprehensive evaluation of performance in terms of efficiency and cavitation. The SIMPLEX accelerating method is used to design a high-head pump-turbine runner to improve the comprehensive performance. Numerical simulation of steady turbulent flow in the full passage shows higher runner＇ s efficiencies and lower cavitation number in both modes of bidirectional flow. With the proposed model, on-line optimization by computer can reduce manual interference in the traditional design.
出处
《水力发电学报》
EI
CSCD
北大核心
2010年第1期223-228,共6页
Journal of Hydroelectric Engineering
基金
国家自然科学基金资助项目(50479006)
关键词
水力机械
优化设计
双向流动
单纯形加速法
hydraulic machinery
optimum design
bidirectional flow
accelerating SIMPLEX method
