论文部分内容阅读
基于三维CFD数值模拟方法对潮流能水平轴水轮机进行分析研究,并与试验结果比较,验证该方法的有效性。通过改变迎流式和背流式偏流角的大小,研究不同偏流角对水平轴水轮机水动力特性的影响规律。结果表明:偏流使水轮机效率及轴向载荷的平均值下降,偏流20°时,迎流式和背流式效率最大下降分别约为5%和6%,轴向载荷系数最大下降分别为5.5%和7.0%;使瞬时值波动幅值增加,偏流角越大,波动幅值越大。
Based on the three-dimensional CFD numerical simulation method, the tidal current horizontal axis turbine is analyzed and compared with the experimental results to verify the effectiveness of the method. The effects of different drift angles on the hydrodynamic characteristics of horizontal-axis turbines were studied by changing the size of the run-on and back-flow drift angles. The results show that: the bias current reduces the average turbine efficiency and axial load. When the bias current is 20 °, the maximum drop of the flow efficiency and the backflow efficiency is about 5% and 6% respectively, and the maximum axial load factor decreases by 5.5% And 7.0% respectively. The amplitude of instantaneous value increased. The larger the drift angle, the larger the amplitude of fluctuation.