Application of J-Groove to the suppression of swirl flow in the draft tube of a Francis hydro turbine

被引：7
|
作者：
Wei, Q. S. [1 ]
Choi, Y. D. [1 ]
Zhu, B. S. [1 ]
机构：
[1] Mokpo Natl Univ, Grad Sch, Muan Gun 534729, Jeonnam, South Korea
来源：
26TH IAHR SYMPOSIUM ON HYDRAULIC MACHINERY AND SYSTEMS, PTS 1-7 | 2013年 / 15卷
关键词：
D O I：
10.1088/1755-1315/15/2/022017
中图分类号：
TE [石油、天然气工业]; TK [能源与动力工程];
学科分类号：
0807 ; 0820 ;
摘要：
The purpose of this study is to examine the validity of J-Groove in controlling and suppressing the swirl flow in a draft tube of Francis hydro turbine which may cause draft surge. "J-Groove" composed of shallow grooves and mounted parallel to the pressure gradient on the draft tube wall is a very simple passive device to suppress several abnormal phenomena in turbomachinery. The CFD analysis has been performed using the draft tube of a Francis hydro turbine model. The calculated results of velocity distribution in the draft tube show that a considerable reduction of swirl velocity is attained by using J-Groove. Besides the vortex core around the dead water region near the draft inlet is reduced by J-Groove.
引用
收藏
页数：10
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