尾水管的改型设计与CFD分析  

Remodel Design for Turbine Draft Tube and CFD Analysis

作　　者：梁武科[1] 刘胜柱[1] 罗兴錡 王得意[1] 

机构地区：[1]西安理工大学水力机械及自动化研究所

出　　处：《中国农村水利水电》2003年第10期14-17,共4页China Rural Water and Hydropower

基　　金：国家自然科学基金资助项目 ( 598790 2 3)

摘　　要：结合伊朗塔里干电站项目 ,将普通尾水管改型设计成窄高型尾水管。根据不同的来流条件 ,分别计算了三种工况 ,并通过CFD分析比较得出 :虽然窄高型尾水管比普通尾水管回能系数略小 ,即效率略小 ,但窄高型尾水管内的涡带比普通尾水管小 ,表明尾水管中的压力脉动小 ,其运行的稳定性好 。Combined with the Taligan Powerplant Project of Ir an , common draft tube is remodeled to high-and-narrow type draft tube. According to different inflow conditions, three operating conditions of three kinds of dr aft tubes are calculated respectively, and conclusions are deduced by CFD analys is: Compared with common draft tube, the energy recovery factor of the high-and- narrow type draft tube is somewhat smaller, and the efficiency is smaller than t hat of the common draft tube; whereas, it is more difficult for the high-and-n arrow type draft tube to form vortex strip than the common draft tube, which ind icates the pressure pulsation is smaller in the high-and narrow-type draft tub e and the stability is better, so the high-and-narrow type draft tube can rep laces the common draft tube.

关 键 词：水轮机 尾水管 改型设计 CFD 分析 回能系数 

分 类 号：TK730.314[交通运输工程—轮机工程]