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利用FLUENT软件对4台额定功率为1.2 MW的水平轴风力机分别在顺列和错列布置方式下及不同入流角情况下进行数值模拟,结合叶轮尾流理论分析转动叶片与塔架之间以及上游两机组间的尾流相互干扰对下游风力机输出功率的影响。结果表明:多机组风力机错列布置时上游风力机尾流对下游风力机功率的输出影响更小。在错列布置中,入流角为15°时上游风力机尾流对下游风力机的影响最小,同时下游风力机的输出功率较大,与其额定功率相比相对误差较小。合理的偏航角有利于下游风力机输出功率的提高,即提高整个风场效率。
Four sets of horizontal axis wind turbines with a rated power of 1.2 MW were simulated by FLUENT software in the sequential and staggered arrangement and at different inflow angles respectively. Based on the theory of the wake of the impeller, the relationship between the rotating blades and the tower and The effect of wake interference between upstream two units on output power of downstream wind turbine. The results show that the upstream wind turbine wake has less influence on the output of downstream wind turbine when the staggered arrangement of multi-unit wind turbines. In the staggered arrangement, the influence of upstream wind turbine wakes on the downstream wind turbine is the smallest when the inflow angle is 15 °, and the output power of the downstream wind turbine is larger than the rated wind power. Reasonable yaw angle is conducive to the downstream wind turbine output power increase, that is to improve the efficiency of the entire wind farm.