中文摘要：

通过数值模拟法对直接空冷凝汽器风机群流体动力学特性进行研究，分析不同风速情况下，挡风墙形状对空冷风机群流体动力学特性的影响．研究结果表明：挡风墙全凹时不仅有利于周边风机吸风，并能削弱热风回流，挡风墙下凹更有利于周边风机吸风．研究结果为实现空冷风机分区调节和电厂节能提供一定基础数据．

英文摘要：

Influences of the wind break wall structures upon fluid dynamics of axial flow fans in direct air-cooled system are numerically simulated under various wind velocities. The results show that the all-concaved wind break wall not only contributed to wind suction of peripheral fans, but also weak- ened the hot recirculation rate, and the half-coneaved wind break wall is more beneficial to the wind suction. These conclusions may provide certain reference to the realization of divisional regulation of fan group and saving energy for power plant.