动态入流下风力机近尾迹气动噪声研究  

STUDY ON NEAR-WAKE AERODYNAMIC NOISE OF WIND TURBINE UNDER DYNAMIC INFLOW

作　　者：荣宇 马剑龙[1,2,3] 赵鑫鑫 吕文春 苏宏杰[1] 张鹏宇 Rong Yu;Ma Jianlong;Zhao Xinxin;Lyu Wenchun;Su Hongjie;Zhang Pengyu(School of Energy and Power Engineering,Inner Mongolia University of Technology,Hohhot 010080,China;Engineering Research Center of Renewable Energy at Universities of Inner Mongolia Autonomous Region,Hohhot 010080,China;Key Laboratory of Wind Energy and Solar Energy Technology,Ministry of Education,Hohhot 010080,China;Research Center of Technology and Vocational Education,Inner Mongolia Technical College of Mechanics and Electrics,Hohhot 010070,China)

机构地区：[1]内蒙古工业大学能源与动力工程学院,呼和浩特010080 [2]内蒙古自治区高校可再生能源工程研究中心,呼和浩特010080 [3]风能太阳能利用技术教育部重点实验室,呼和浩特010080 [4]内蒙古机电职业技术学院科技与职教研究中心,呼和浩特010070

出　　处：《太阳能学报》2023年第12期266-273,共8页Acta Energiae Solaris Sinica

基　　金：国家自然科学基金(51966014);内蒙古自治区科技计划项目(2021GG0436);内蒙古自治区高等学校科学研究项目(NJZZ21067);内蒙古机电职业技术学院科学研究项目(NJDZR2201)。

摘　　要：基于自然风非定常性,结合某S翼型水平轴风力机实际运行条件拟合出3种动态入流函数,建立不同入流下的非稳态计算模型,研究动态入流对尾迹气动噪声和叶片压力脉动的影响。结果表明:各动态入流下各倍频声压级均高于恒定入流,大小规律表现为:扰动入流>渐变入流>阵风入流>恒定入流;动态入流对声压级的敏感性随倍频阶数增大而增强;沿轴向动态入流与恒定入流声压级差值逐渐增大;阵风入流、渐变入流和扰动入流的压力脉动峰值依次增大,这也是声压级产生相同大小规律的原因。通过分析入流情况对叶片声场分布和变化规律影响研究,对未来大型叶片噪声评估和降噪设计提供一定的理论和参考依据。Based on the non-stationary characteristic of natural wind,three kinds of dynamic inflow functions are fitted based on the actual operating conditions of an S-wing horizontal axis wind turbine,and the non-stationary calculation models under different inflow are established to study the effects of dynamic inflow on the wake aerodynamic noise and blade pressure pulsation.The results show that:the sound pressure level at each octave is higher than that at constant inflow under dynamic inflow,and the magnitude is as follows:disturbance inflow>gradient inflow>gust inflow>constant inflow;the sensitivity of dynamic inflow to sound pressure level increases with the increase of octave order;the sensitivity of dynamic inflow to sound pressure level increases with the increase of octave order.The sound pressure level difference between dynamic inflow and constant inflow along the axial direction gradually increases;the peak pressure pulsation of gust inflow,gradual inflow and disturbance inflow increases in turn,which is also the reason for the same size law of sound pressure level.By analyzing the influence of the inflow condition on the blade sound field distribution and change law,it provides some theoretical and reference basis for future large blade noise assessment and noise reduction design.

关 键 词：风力机 噪声测量 涡量 压力脉动 动态入流 

分 类 号：TK83[动力工程及工程热物理—流体机械及工程]