噪声与振动控制2024，Vol.44Issue(2)：280-287,8.DOI:10.3969/j.issn.1006-1355.2024.02.045
风力机叶片气动噪声风洞试验及数值计算
Wind Tunnel Test and Numerical Calculation of Aerodynamic Noise of Wind Turbine Airfoils
摘要
Abstract
Wind turbine blades can produce obvious aerodynamic noise during operation.The aerodynamic noise experiment of NACA0012 airfoil was carried out in an acoustic wind tunnel,and aerodynamic noise characteristics at different wind speeds were obtained.The numerical calculation model based on large eddy simulation was established.The lift-drag coefficients were verified,and the mesh independence was analyzed.According to the flow field simulation and FW-H equation,the sound pressure levels of airfoils with an attack angle of 5°at 10 m/s,15 m/s and 20 m/s wind speeds were calculated respectively.The global trends of sound pressure level spectra acquired by numerical simulation and acoustic wind tunnel experiment are quite consistent.Furthermore,the effects of different blade sizes on the flow field and aerodynamic noise were studied by numerical simulation.According to the vorticity charts of unsteady flow field at different wind speeds,the flow separation point of the airfoil moves backward with the increase of wind speed,and the vortex scale gradually decreases.At the same wind speed,the separation vortex of large-sized airfoil is larger,and the distance between vortex cores is larger.According to the sound pressure level spectra of different size airfoils obtained by numerical simulation,the increase of airfoil size leads to the increase of sound pressure levels in broad frequency range,and the peak in the spectrum diagram moves to lower frequency side.The research results have a reference significance for blade aerodynamic noise analysis and acoustic environment assessment.关键词
声学/气动噪声/声学风洞/值模拟/风力机叶片Key words
acoustics/aerodynamic noise/acoustic wind tunnel/numerical simulation/wind turbine blade分类
能源科技引用本文复制引用
姜广,刘禹鹏,王振宇..风力机叶片气动噪声风洞试验及数值计算[J].噪声与振动控制,2024,44(2):280-287,8.基金项目
国家自然科学基金资助项目(51779224,51579221) （51779224,51579221）
浙江省基础公益研究计划资助项目(LHZ19E090002) （LHZ19E090002）
