基于CFD灯泡贯流式水轮机定导变桨内流特性研究  

Research on Internal Flow Characteristic of Fixed Guide Blade and Variable Paddle of Bulb Tubular Turbine Based on CFD

作　　者：郭彤 牧振伟[1,2] 夏庆成 贵辛未[1,2] 李泽发 GUO Tong;MU Zhen-wei;XIA Qing-cheng;GUI Xin-wei;LI Ze-fa(School of Water Resources and Civil Engineering,Xinjiang Agricultural University,Urumqi 830052,China;Xinjiang Key Laboratory of Water Resources Engineering Safety and Water Disaster Prevention,Urumqi 830052,China)

机构地区：[1]新疆农业大学水利与土木工程学院,新疆乌鲁木齐830052 [2]新疆水利工程安全与水灾害防治重点实验室,新疆乌鲁木齐830052

出　　处：《水电能源科学》2023年第6期171-174,共4页Water Resources and Power

摘　　要：为研究灯泡贯流式水轮机不同桨叶开度结构在大中小流量工况下的内流特性,以三维流线分布、中心子午面流线分布及中心子午面压力分布为研究指标,对过流部件结构和协联关系优化做理论支持。结果表明,流态分析中灯泡贯流式水轮机转轮处流速最大、流态混乱,为效率优化重点,并分析了尾水管内产生涡旋的原因,提出可通过减小死水区域达到优化效果;压力分析中内部压力从进水流道到尾水管总体呈减小趋势,经计算转轮泄水锥处压力值最小;尾水管中沿水流方向压力逐步增大,当流量达到124.92 m3/s时,最高压力值为82 464.15 Pa。该计算结果及分析为灯泡贯流式水轮机改造优化提供了参考依据。To study the internal flow characteristics of bulb tubular turbine with different blade opening structures un-der large medium and small flow conditions,and to make theoretical support for the optimization of the flow passage components structure and the coordinated relationship,the research indexes were taken as three-dimensional streamline distribution,central meridian plane streamline distribution and central meridian plane pressure distribution.The results indicated that the maximum flow velocity existed at the runner of the bulb tubular turbine in the flow pattern analysis,and the flow pattern was chaotic,which was the focus of efficiency optimization.The reason of vortex in the draft tube was analyzed,and it could be optimized by reducing the dead water area.The internal pressure showed an overall decline tendency from the inlet channel to the draft tube.The pressure value at the runner discharge cone was the smallest.The pressure in the draft tube gradually increased along the flow direction,and the highest pressure value was 82464.15 Pa when the flow rate reached 124.92 m 3/s.The calculation results can provide a reference basis for the modification and op-timization of the bulb tubular turbine.

关 键 词：灯泡贯流式水轮机 定导变桨 内流特性 数值模拟 

分 类 号：TV734.1[水利工程—水利水电工程] TK73[交通运输工程—轮机工程]