开发一种基于动态格栅的湍流风实验模拟方法和装置,并通过调节格栅运动参数和来流风速,实现对湍流风特征参数的定量调控。实验分别研究罗斯贝数Ro、格栅雷诺数ReM、格栅运动角加速度α、格栅运动周期长度T对湍流参数的影响规律。结果表明,湍流参数仅对罗斯贝数敏感,平均风速与湍流度均随罗斯贝数增加而增大,而湍流积分尺度则呈现先减小后增大的趋势。综合实验工况参数,得到湍流强度可调节范围为0.05~0.39,湍流积分尺度可调节范围为0.15~1.56 m,适用于缩尺比1∶20~1∶1200范围的风电机组模型实验。
Abstract
An experimental simulation method and device of turbulent wind based on active grid were developed. By adjusting the wind speed and grid motion parameters, the control of turbulent wind is realized. The effects of Rossby number Ro, grid Reynolds number ReM, grid motion angular acceleration α and grid motion period length T on turbulence parameters were studied. The results show that the turbulence parameters are most sensitive to Rossby number. The average wind speed and turbulence intensity increase with the increase of Rossby number, while the turbulence integral scale decreases first and then increases. Based on the experimental parameters, the adjustable range of turbulence intensity is 5%-39%, and the adjustable range of turbulence integral scale is 0.15-1.56 m, which is suitable for wind turbine model experiments with a scale ratio of 1∶20-1∶1200.
关键词
风电 /
风洞 /
湍流 /
动态格栅 /
湍流积分尺度
Key words
wind power /
wind tunnel /
turbulence /
active grid /
turbulence integral scale
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基金
国家重点研发计划“可再生能源技术”专项（2022YFB4201300）; 国家自然科学基金（52276187）; 华能集团总部科技项目（HNKJ20-H88）
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