贯流式斜向空间导叶全三维密合设计  

Full three-dimensional sealing design for tubular conical space guide vanes

作　　者：李凤超[1] 樊红刚[1] 王正伟[1] 陈乃祥[1] 

机构地区：[1]清华大学热能工程系,水沙科学与水利电力工程国家重点实验室,北京100084

出　　处：《清华大学学报（自然科学版）》2010年第2期266-269,共4页Journal of Tsinghua University(Science and Technology)

基　　金：国家自然科学基金资助项目(50709017);水沙科学与水利水电工程国家重点实验室自主研究课题(2008-ZY-2)

摘　　要：为实现贯流式机组斜向空间导叶的密合设计,提出了一种基于最优化技术的设计方法。利用全三维反问题模型设计导叶叶型,保证它具有良好的绕流性能,并为转轮提供必需的环量。以出口边和进口边附近叶片表面上的准正交网格线构成密合基线为目标,采用单纯形加速法控制速度矩参数的变化,使得叶型逐步满足密合要求。导叶和桨叶进行联合数值模拟,结果表明,设计的导叶绕流水力损失小,并且设计计算具有足够的精度。A sealing method was developed based on optimization techniques to design conical space guide vanes for tubular turbines. The vane shape was designed using a full three-dimensional inverse model to give good flow performance and the required circulation in the runner inlet section. The accelerating simplex method was used to control the swirl with vanes sealed progressively with the outlet edge and quasi-orthogonal grid lines near the inlet edge forming sealing lines. A combined numerical simulation of the flow around the guide vanes and the blades indicates that hydraulic losses in the guide vane region are low and the design method is accurate.

关 键 词：贯流式水轮机 锥形导叶 密合设计 全三维 单纯形加速法 

分 类 号：TV136.1[水利工程—水力学及河流动力学]