水轮机椭圆蜗壳设计的CFD计算及试验分析  

Oval Section Design of Spiral Case Based on CFD & Model Test

作　　者：王旭[1] 李萍[1] 陈荣盛[2] 吴凡[3] 

机构地区：[1]电子科技大学成都学院,四川成都611731 [2]中国电建集团成都勘测设计研究院有限公司,四川成都610000 [3]哈尔滨电机厂有限责任公司,黑龙江哈尔滨150040

出　　处：《人民黄河》2016年第1期109-111,115,共4页Yellow River

基　　金：四川省教育厅自然科学项目(14ZB0385)

摘　　要：为优化水轮发电机组的出力性能,节约施工成本,提出了设计椭圆形截面蜗壳的思路。以一台混流式水轮机组的蜗壳为研究对象,建立了额定工况下圆形及1.1∶1.0、1.2∶1.0长短轴比的椭圆截面设计方案的计算模型,设置相同的条件进行CFD流场分析,优选出了流动性能合理的设计方案。模型试验结果显示,各测点的速度和压力仿真与试验数据相比较平均误差较小,蜗壳的试验效率基本满足要求。采用椭圆形状的蜗壳,有利于改善机组的出力性能。In order to optimize the turbine capacity and save construction cost,the paper proposed a method of elliptical spiral case design.Taking the spiral case of Francis turbine as an example,it established 3 spiral case models including types of circular section,length ratio1. 1: 1. 0 and 1. 2: 1. 0 of elliptic section at the rated condition. It took same conditions for 3 flow model in process of CFD simulation and according to the calculation results,the optimum design scheme was selected at last. As the result of model testing,it had low average deviation between simulation and testing,the result of efficiency experiment was reasonable either. So we can get a conclusion that the turbine capacity can be increased by using the elliptical spiral case.

关 键 词：蜗壳 椭圆截面 CFD分析 模型试验 

分 类 号：TV136[水利工程—水力学及河流动力学]