相位角对双机组立轴水轮机的水动力性能影响

发布时间：2018-03-27 19:42

本文选题：双机组轮机　切入点：CFD　出处：《哈尔滨工程大学学报》2016年01期

【摘要】：为了研究相位角对双机组两叶片垂直轴潮流能水轮机的水动力性能影响,采用CFD数值模拟方法,计算了不同初始相位角下水轮机水动力性能,得到水轮机的效率、叶片切向力系数及法向力系数的变化规律,并通过速度矢量图和压力图的细节分析,解释变化机理。研究结果表明:双机组潮流能水轮机效率比两个单机组水轮机工作效率高,特别在中高速比时更明显。除0°以外的相位角下水轮机总效率相近且高于0°时的效率。90°相位角时两个机组的效率曲线基本重合,且此时叶片受力系数小,叶尖高压区域也小,从而受到压力较小。选取90°作为初始启动相位角既可以提高双机组水轮机效率又可以减小叶片受力,增加水轮机的使用寿命。
[Abstract]:In order to study the effect of phase angle on hydrodynamic performance of two vane vertical axis power turbine, the hydrodynamic performance of hydraulic turbine under different initial phase angles is calculated by using CFD numerical simulation method, and the efficiency of hydraulic turbine is obtained. The variation law of tangential force coefficient and normal force coefficient of blade is explained by analyzing the details of velocity vector diagram and pressure chart. The research results show that the efficiency of two-unit power flow turbine is higher than that of two single-unit turbines. When the phase angle is higher than 0 掳, the efficiency curve of the two units is basically coincident, and the blade force coefficient is small, and the high pressure area of the blade tip is small, especially when the phase angle is higher than 0 掳, the total efficiency of the turbine is close to that of the phase angle of 0 掳, and the efficiency curve of the two units is basically the same when the phase angle is higher than 0 掳. Selecting 90 掳as the initial starting phase angle can not only improve the efficiency of the turbine, but also reduce the force on the blade and increase the service life of the turbine.
【作者单位】：哈尔滨工程大学深海工程技术研究中心;
【基金】：国家自然科学基金资助项目(51209060;11572094;) 高等学校博士学科点专项科研基金资助项目(20122304120035) 哈尔滨市科技创新人才研究专项资金资助项目(2015RQQXJ014)
【分类号】：TK730

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