Using Steady Flow Analysis for Noise Predictions
Three different methods based on steady Reynolds-averaged Navier-Stokes (RANS) solutions are used to calculate the noise emitted from airfoils.Their results are compared to the ones obtained from experiments,a semi-empirical airfoil self-noise prediction code called NAFNoise developed by NREL,and large eddy simulations (LES).The three methods considered are a noise metric developed by Hosder et al.which can only predict overall sound pressure levels (OASPL) but no frequency spectra and two different statistical models developed by Doolan et al.and Remmler et al.The method by Doolan et al.employs a Greens function solution for airfoil trailing-edge far-field noise whereas the method by Remmler et al.predicts the pressure spectrum on the airfoil surface which is then used to compute the far-field sound by means of a hybrid noise prediction.All noise predictions were made at low speed and moderate Reynolds number similar to the environment of a small unmanned aerial system and involved different NACA airfoils as well as the SD 7003 airfoil.
CFD RANS Aeroacoustics Statistical Model for Turbulence Hybrid Noise Prediction
Markus Peer Rumpfkeil
Contractor, AFRL, Wright-Patterson AFB, USA;Department of Mechanical and Aerospace Engineering, University of Dayton, USA Corresponding author: Markus.Rumpfkeil@udayton.edu
国际会议
The 8th International Conference of Computational Fluid Dynamics, (ICCFD8)(第八届国际计算流体力学会议)
成都
英文
1-17
2014-07-25（万方平台首次上网日期，不代表论文的发表时间）