聚风型风力机尾流的数值模拟研究  

Numerical Simulation of the Wake Flow of Wind Turbine With a Flanged Diffuser

作　　者：刘洁[1] 陈凯[1] 张兴[1] 

机构地区：[1]清华大学航天航空学院,传热与能源利用北京市重点实验室,热科学与动力工程教育部重点实验室,北京100084

出　　处：《工程热物理学报》2013年第11期2140-2143,共4页Journal of Engineering Thermophysics

基　　金：国家高技术研发计划(863计划)(No.2007AA05Z426);国家国际科技合作专项项目(No.2011DFG13020)

摘　　要：聚风罩能够显著提高风能利用效率,同时会对风力机的尾流产生影响,本文利用计算流体力学(CFD)方法模拟聚风罩附近及其尾流的流场,用体积力方法模拟风轮,研究聚风罩对风力机尾流的影响,计算结果表明:增加聚风罩使风力机的尾流区速度衰减增加,宽度略有减小.本文进一步改变风轮的推力系数.研究不同推力系数下尾流的变化.数值结果表明,改变推力系数影响近尾流,对远尾流没有影响.Using a flanged diffuser around the wind turbine can improve the production notably, while make some effect on the wake flow. In this paper, in order to investigate the influence of flanged diffuser, the CFD method has been taken to simulate the flow field around the wind turbine and the wake flow, and the effect that the rotor bring to wind energy is considered as volume force. The result shows that adding flanged diffuser make the velocity of the wake flow reduce more and the width become smaller slightly. Furthermore, thrust coefficient has been changed to study the characteristic of wake flow. It demonstrates that different thrust coefficient affect near wake flow and have no effect on far region.

关 键 词：聚风罩 CFD 尾流 风力机 

分 类 号：TK89[动力工程及工程热物理—流体机械及工程]