Experimental Investigation of Reynolds Number Effect on Wind Turbine Profiles in the Cryogenic Wind Tunnel Cologne DNW-KKK  

作　　者：RUdiger Rebstock Junnai Zhai Alois P. Schaffarczy 

机构地区：[1]German-Dutch Wind Tunnels, DNW-KKK, Linder Hoehe, Cologne D-51147, Germany [2]Department of Mechanical Engineering, University of Applied Sciences Kiel, Kiel D-24149, Germany

出　　处：《Journal of Energy and Power Engineering》2013年第10期1957-1965,共9页能源与动力工程（美国大卫英文）

摘　　要：Wind turbine size has increased continuously and correspondingly also its Reynolds numbers. The Reynolds number effect can therefore no longer be ignored in design and optimization of wind turbines. Reliable profile test data should be available. A suitable facility for testing wind turbine profiles at high Reynolds numbers is the Cryogenic Wind Tunnel Cologne DNW-KKK. By means of injecting liquid nitrogen the tunnel can be cooled down to 100 K and the Reynolds number therefore can be raised accordingly. The maximum Reynolds number for 2D profile tests can reach 27x10^6. In this paper the test uncertainty and the flow quality of DNW-KKK were analyzed. Then some test results on the Reynolds number effect of the wind turbine profiles will be presented. The Reynolds number effect is different from model to model. Especially for thick profiles and flow control devices the Reynolds number effect is not always like the description in literature.

关 键 词：Aerodynamics of wind turbine profiles Reynolds number effect cryogenic wind tunnel test. 

分 类 号：TM315[电气工程—电机] U441[建筑科学—桥梁与隧道工程]