VESTNIK of Samara University. Aerospace and Mechanical EngineeringVESTNIK of Samara University. Aerospace and Mechanical Engineering2542-04532541-7533Samara National Research University638410.18287/2541-7533-2018-17-4-102-114UnknownImpact of the turbulence modeling approach on the accuracy of the fan noise level predictionPyatuninK. R.<p><span lang="EN-US">Head of CAE Department</span></p>kirill.pyatunin@uec-saturn.ruArkharovaN. V.<p><span lang="EN-US">Design Engineer of Aerodynamic and Aeroacoustic Team, CAE Department</span></p>arkharova_nata@mail.ruPublic Joint-Stock Company UEC-Saturn201220181741021142012201820122018Copyright © 2018, VESTNIK of Samara University. Aerospace and Mechanical Engineering2018<p>The fan is the dominant source of noise for modern high bypass ratio aircraft engines. The article presents the results of investigating the influence of the approach to modeling the turbulence in modeling fan stage noise generation on the results of noise level prediction. Numerical investigation was performed for a model fan stage in test conditions in an anechoic chamber. Basic operating modes determining the acoustic performance of the fan were used. Calculation of far-field noise was performed using finite element modeling on the basis of the modal composition of generated noise. The influence of the turbulence model on the number and amplitude of acoustic modes excited in the flow on the fundamental frequency harmonics was analyzed. It is shown that modeling of the anisotropic flow turbulence in calculating non-stationary rotor-stator interaction makes it possible to obtain results close to the experimental ones.</p>Двухконтурный турбореактивный двигательвентиляторротор-статор взаимодействиезвуковое давлениеаэроакустикатурбулентностьканальные модычисленное моделированиеBypass turbojet enginefanrotor-stator interactionturbulenceacoustic modessound pressure levelnumerical modeling[1. Korzhnev V.N., Mileshin V.I., Pochkin Ya.S, Khaletsky Yu.D. and etc. Experimental investigation of aerodynamic and acoustic performance of a model C180-2 bypass fan with booster stages using a C3A acoustic test facility. CIAM research / technical report, 2011.][2. Rossikhin A., Pankov S., Brailko I., Mileshin V. Numerical investigation of high bypass ratio fan tone noise. Proceedings of the ASME Turbo Expo 2014: Turbine Technical Conference and Exposition (June, 16-20, 2014, Dusseldorf, Germany). 2014. V. 2A.][DOI: <a href='http://doi.org/10.1115/GT2014-26354'>10.1115/GT2014-26354</a>][3. Zamtfort B.S., Rylko О.А., Sorokin L.I., Shipov R.А. Method and program for noise prediction of high bypass ratio turbofan engine in test-bed conditions. CIAM technical report no 7080, 1973.]