风力机翼型动态测压试验技术研究

结合国家高技术研究发展计划课题"风力机先进翼型族的设计与试验研究",针对动态试验设备研制、数据采集和处理方法,在西北工业大学1.6m×3.0m低速翼型风洞(NF-3风洞)开展了风力机翼型动态测压试验技术的研究。采用S809风力机翼型模型,在雷诺数0.75×106和1.4×106、迎角-2°～+18°条件下,通过改变模型3个平均迎角、3个振荡频率和2个振幅角等状态,进行了动态测压试验,并与静态测压及国外试验结果进行了对比。结果表明:NF-3风洞研制的试验设备,采用的数据采集和处理方法能够应用于风力机翼型的动态测压试验,并可推广应用于其他的翼型动态测压试验研究。

Dynamic pressure measurement techniques on wind turbine airfoil

Combined with development of the airfoil model oscillation facilities and data acquisition system required in the project "Advanced Airfoil Series Design and Experiment Investigation of Wind Turbines" financially supported by the National High Technology Research and Development Program of China,dynamic pressure measurement on the S809 airfoil model was carried out under steady state and unsteady conditions in 1.6m×3.0m two dimensional wind tunnel(NF-3) in Northwestern Polytechnical University.The test defined baseline conditions for steady state at angles of attack from-2° to +18° and examined unsteady behavior by oscillating the model about its pitch axis for three mean angles,three frequencies,and two amplitudes.For all oscillating cases,Reynolds numbers of 0.75 and 1.4 million were used.The comparisons between the steady,unsteady experimental results in this test and experimental results from references were carried out.Results show that the facilities and data acquisition system used in NF-3 wind tunnel are reliable and feasible,and it could be used not only for oscillation test on airfoils of wind turbines,but also for unsteady pressure test on other types of airfoils.