安装高程对潮流能水轮机尾迹特性影响试验研究  

EXPERIMENTAL STUDY ON INFLUENCE OF TURBINE SETTING ELEVATION ON WAKE CHARACTERISTICS OF TIDAL TURBINE

作　　者：赵梦晌 张玉全[2] 郑源[2] 杨春霞[2] 张智 唐庆宏 Zhao Mengshang;Zhang Yuquan;Zheng Yuan;Yang Chunxia;Zhang Zhi;Tang Qinghong(College of Water Conservancy and Hydropower Engineering,Hohai University,Nanjing 210098,China;College of Energy and Electrical Engineering,Hohai University,Nanjing 210098,China)

机构地区：[1]河海大学水利水电学院,南京210098 [2]河海大学能源与电气学院,南京210098

出　　处：《太阳能学报》2022年第4期486-492,共7页Acta Energiae Solaris Sinica

基　　金：国家自然科学基金(51809083);国家自然基金(51709086);江苏省自然科学基金(BK20180504)。

摘　　要：为探究安装高程对潮流能水轮机尾迹特性的影响,以模型潮流能水轮机为研究对象,采用ADV采集尾流场速度数据,对比分析不同高程下的尾流场特性,揭示安装高程对潮流能水轮机尾迹特性的影响规律。结果表明:随着安装高程的增加,转轮后方尾流速恢复速度逐渐加快,而湍流强度和雷诺切应力恢复速度有逐渐减小的趋势;横向尾流场水动力特性沿转轮中心线基本呈对称分布,纵向剖面中,尾流速度呈现明显向自由液面漂移的现象,而湍流强度和雷诺切应力未出现明显的漂移现象;安装高程主要影响下游的尾迹恢复速率,而对沿水深和水平面方向的尾迹影响较小,支撑结构仅对近尾流1.5D(D为转轮直径)范围内尾迹结构影响较大,而对远尾迹特性影响较小。In order to research the different wake characteristics of tidal turbine at different setting elevations,the velocity was measured by Acoustic Doppler Velocimeter(ADV)and the different wake characteristics were compared,the general wake distribution regulation were revealed at different working conditions.The results indicate that the recovery rate of velocity deficit is gradually increase,however the recovery rate of turbulence intensity and Reynolds shear stress gradually decrease as the growth of the turbine setting elevation.The different wake characteristics are nearly symmetrical along the center line of the runner at the transverse flow field,the wake velocity drift to the free surface at the longitudinal profile,while the turbulence intensity and Reynolds shear stress do not perform distinct same behavior.The different turbine setting elevations mainly affect the wake recovery rate at the downstream,however perform little influence on the wake characteristics along the depth and horizon.The support structure only perform a postive effect on the wake characteristics within 1.5D at the near wake,while perform a negative effect at the far wake.

关 键 词：安装高程 潮流能 尾迹特性 雷诺切应力 模型试验 

分 类 号：TK307[动力工程及工程热物理—热能工程]