A novel hybrid method for aerodynamic noise prediction of high-lift devices  

作　　者：Jun TAO Gang SUN 

机构地区：[1]Department of Aeronautics&Astronautics,Fudan University,Shanghai 200433,China [2]Key Laboratory of Aerodynamic Noise Control,China Aerodynamics Research and Development Center,Mianyang 621000,China

出　　处：《Chinese Journal of Aeronautics》2023年第9期151-161,共11页中国航空学报（英文版）

基　　金：This study was co-supported by the Shanghai Pujiang Program,China(No.20PJ1402000);the Open Project of Key Laboratory of Aerodynamic Noise Control,China(No.ANCL20200302);Shanghai Key Laboratory of Aircraft Engine Digital Twin,China(No.HT-6FTX 0021-2021).

摘　　要：Aerodynamic noise of High-Lift Devices(HLDs)is one of the main sources of airframe noise,and has immediate impacts on the airworthiness certification,environmental protection and security of commercial aircraft.In this study,a novel hybrid method is proposed for the aerodynamic noise prediction of HLD.A negative Spalart-Allmaras(S-A)turbulence model based Improved Delayed Detached Eddy Simulation(IDDES)method coupling with AFT-2017b transition model is developed,in order to elaborately simulate the complex flow field around the HLD and thus obtain the information of acoustic sources.A Farassat-Kirchhoff hybrid method is developed to filter the spurious noise sources caused by the vortex motions in solving the Ffowcs Williams-Hawkings(FW-H)equation with permeable integral surfaces,and accurately predict the far-field noise radiation of the HLD.The results of the 30P30N HLD indicate that,the computational Sound Pressure Levels(SPLs)obtained by the Farassat-Kirchhoff hybrid method conform well with the experimental ones in the spectrum for the given observation point,and are more accurate than those obtained by the Farassat 1A method.Based on the hybrid method,the acoustic directivity of the HLD of a commercial aircraft is obtained,and the variation of the SPLs in the spectrum with the deflection angle of the slat is analyzed.

关 键 词：Aerodynamic noise Farassat-Kirchhoff hybrid method High-lift devices IDDES Negative S-A turbulence model 

分 类 号：V211[航空宇航科学与技术—航空宇航推进理论与工程]