Π型竖轴双转子水轮机纵荡水动力特性研究  

Hydrodynamic characteristics of Π-type vertical-axis parallel dual-rotor turbine in surge motion

作　　者：马勇 胡超 郑雄波 邓锐 MA Yong;HU Chao;ZHENG Xiongbo;DENG Rui(Deepwater Engineering and Technology Research Center, Harbin Engineering University, Harbin 150001, China;School of Marine Engineering and Technology, Sun Yat-sen University, Zhuhai 519082, China)

机构地区：[1]哈尔滨工程大学深海工程技术研究中心,黑龙江哈尔滨150001 [2]中山大学海洋工程与技术学院,广东珠海519082

出　　处：《哈尔滨工程大学学报》2019年第8期1387-1392,共6页Journal of Harbin Engineering University

基　　金：国家自然科学基金项目(51779062,51679053);中央高校基本科研业务费项目(HEUCFP201714);黑龙江省自然科学基金项目(A2016001)

摘　　要：为提高潮流能装置发电功率及可靠性,加快潮流能开发利用,本文提出了一种Π型竖轴双转子水轮机的设计,并对Π型竖轴双转子水轮机的纵荡运动特性进行了研究。基于CFD方法,通过将水轮机旋转运动与振荡运动相结合的方法模拟水轮机的纵荡运动,对竖轴双转子水轮机在不同振荡频率、振荡幅值及叶尖速比下的纵荡运动进行模拟计算,同时与均匀流无振荡工况下的水轮机作对比,分别对振荡运动下双转子水轮机受力、获能效率及流场的变化特征进行分析。研究结果表明:双转子并列布置可提高水轮机获能效率、纵荡幅值及频率对平均获能效率影响较小。纵荡下双转子水轮机所受推力及侧向力的波动较大,且推力及侧向力波动幅值与振幅及振荡频率成正比。振荡频率影响泄涡频率,振荡幅值影响尾涡区长度。To improve the power output and reliability of the tidal current device and accelerate the use of tidal current energy, in this paper, we present our design of a Π kind of vertical-axis dual rotor, and we investigate the hydrodynamics of the surge motion. Using computational fluid dynamics, we combine the rotary and oscillation motions of the turbine to simulate the turbine oscillation movement. We simulate and perform calculations of the vertical-axis dual-rotor turbine operating at different oscillation frequencies, oscillation amplitudes, and tip speed ratios, and compare our results with a turbine working at uniform flow without oscillation. We then analyze the variation characteristics of the force, energy efficiency, and flow field of the dual-rotor turbine under oscillating motion. The results shows that a parallel dual-rotor arrangement can improve the power output efficiency, but the oscillation frequency and amplitude have less influence on the average power output. The fluctuation amplitudes of the thrust and lateral force of the dual-rotor turbine under oscillation movement are greater and proportional to the oscillation amplitude and frequency. The oscillation frequency affects the vortex discharge frequency and the oscillation amplitude affects the length of the tail vortex region.

关 键 词：潮流能 竖轴双转子水轮机 水动力特性 强迫振荡 CFD方法 

分 类 号：TK730[交通运输工程—轮机工程]