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TsAGI Science Journal

ISSN Imprimir: 1948-2590
ISSN En Línea: 1948-2604

TsAGI Science Journal

DOI: 10.1615/TsAGISciJ.2019033112
pages 621-633

DEVELOPMENT OF A ZONAL RANS-IDDES APPROACH TO SIMULATE FLOW AROUND BODIES IN ORDER TO REDUCE THE COMPUTATIONAL REQUIREMENTS IN COMPUTATIONAL AEROACOUSTICS

Vladimir Evgenievich Makarov
Central Institute of Aviation Motors (CIAM), 2, Aviamotornaya Street, Moscow, 111116, Russian Federation
Viktor Alexandrovich Shortstov
Central Institute of Aviation Motors (CIAM), 2, Aviamotornaya Street, Moscow, 111116, Russian Federation

SINOPSIS

Several new approaches are tested in a complex of problems of developed turbulent flow in aflat channel with the noise of the trailing edge of NACA012 airfoil streamlined at zero angle of attack. The non-equilibrium wall law for the Spalart-Allmaras turbulence model, used together with improved delayed detached eddy simulation (IDDES), is considered as well as a modification of the a function (IDDES) aimed at improving the calculation results in the case of a uniform mesh pitch in tangential directions. The calculation results showed that in the case of meshes with widely differing wall cell sizes, the parameters of the boundary layer and far-field spectra are consistent with the accuracy of the calculation results, which is satisfactory for practical applications, and with the available experimental data. The proposed modification of the a function under the condition of uniformity along the tangential mesh directions significantly reduced the error in calculating the average velocity in the center of the test channel under study. In this case, the regular shift of the noise spectrum in the far field did not exceed 2-3 dB.

REFERENCIAS

  1. Shorstov, V.A. and Makarov, V.E., Computing Aerodynamic and Acoustic Characteristics of the NACA0012 Airfoil Using Zonal RANS-IDDES Approach, Mat. Model. (Math. Models Comput. Simul.), vol. 30, no. 5, pp. 19-36, 2018.

  2. Travin, A.K., Shur, M.L., Spalart, Ph.R., and Strelets, Mk.H., Improvement of Delayed Detached-Eddy Simulation for LES with Wall Modelling, in Proc. of European Conference on Computational Fluid Dynamics (ECCOMAS CFD), 2006.

  3. Spalart, P.R. and Allmaras, S.R., A One-Equation Turbulence Model for Aerodynamic Flows, AIAA Paper 1992-0439, 1992.

  4. FLUENT, Inc., FLUENT6.1 User's Guide, Lebanon, NH: FLUENT, Inc., 2003.

  5. Gritskevich, M.S., et al., Development of DDES and IDDES Formulations for the k-w Shear Stress Transport Model, Flow Turbulence Combust., vol. 88, no. 3, pp. 431-449, 2012.

  6. Knopp, T., On Grid-Independence of RANS Predictions for Aerodynamic Flows Using Model-Consistent Universal Wall-Functions, in Proc. of European Conference on Computational Fluid Dynamics (ECCOMAS CFD), 2006.

  7. Babulin, A.A., Bosnyakov, S.M., Vlasenko, V.V., Engulatova, M.F., Matyash, S.V., and Mikhailov, S.V., Experience of Validation and Tuning of Turbulence Models as Applied to the Problem of Boundary Layer Separation on a Finite-Width Wedge, Comput. Math. Math. Phys., vol. 56, no. 6, pp. 1020-1033,2016.

  8. Herrig, A., Wurz, W., Kramer, E., and Wagner, S., New CPV-Results of NACA0012 Trailing-Edge Noise, in Proc. of International Conference on Methods of Aerophysical Research (ICMAR), 2008.


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