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直接空冷风机进口空气流动特性

, PP. 46-53

Keywords: 直接空冷,轴流风机,进口流动特性,集群效应

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Abstract:

直接空冷风机数十台集群运行,掌握其运行特性,对空冷系统的设计、运行具有指导意义。在空冷风机集群效应中,风机进口空气流动特性又是影响集群运行的关键因素之一。文中从数值模拟和模型实验2个角度探讨了空冷风机(群)进口流动特性。研究结果表明,单台风机运行时,由于进气角度过大。最外侧出现速度较小区。当有风机抢风时,这一情况改善,但最外侧的风机进气条件不好,这是产生风机群集群效应时最外侧风机流量偏小的原因之一。文中提出位置系数的概念,并用位置系数分析了6台风机同时运行时的进口空气流动特性,为进一步揭示风机群的运行规律提供参考。

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