Aeroacoustics Investigations of Unsteady 3D Airfoil for Different Angle Using Computational Fluid Dynamics Software
Noise disturbance is one of the major factors considered in the fast development of aircraft technology. This paper reviews the flow field, which is examined on the 2D NACA0015 and 3D NACA0012 blade profile using SST k-ω turbulence model to compute the unsteady flow field. We inserted the time-dependent flow area variables in Ffowcs-Williams and Hawkings (FW-H) equations as an input and Sound Pressure Level (SPL) values will be computed for different angles of attack (AoA) from the microphone which is positioned in the computational domain to investigate effect of augmentation of unsteady 2D and 3D airfoil region noise level. The computed results will be compared with experimental data which are available in the open literature. As results; one of the calculated Cp is slightly lower than the experimental value. This difference could be due to the higher Reynolds number of the experimental data. The ANSYS Fluent software was used in this study. Fluent includes well-validated physical modeling capabilities to deliver fast, accurate results across the widest range of CFD and multiphysics applications. This paper includes a study which is on external flow over an airfoil. The case of 2D NACA0015 has approximately 7 million elements and solves compressible fluid flow with heat transfer using the SST turbulence model. The other case of 3D NACA0012 has approximately 3 million elements.
Digital Object Identifier (DOI): doi.org/10.5281/zenodo.1474349Procedia APA BibTeX Chicago EndNote Harvard JSON MLA RIS XML ISO 690 PDF Downloads 688
 (WWEA, 2016); http://www.wwindea.org/the-world-sets-new-wind-installations-record-637-gw-new-capacity-in-2015/.
 Brooks T., Schlinker R.; Progress in rotor broadband noise research; Vertica 7; 1983; 287–307.
 Wasala S., Storey R., Norris S., Cater J.; Aeroacoustic noise prediction for wind turbines using Large Eddy Simulation; Journal of Wind Engineering and Industrial Aerodynamics; 2015; 17-28.
 Migliore P; The potential for reducing blade-tip acoustic emissions for small wind turbines. Subcontractor Report; NREL/SR-500-43472; 2009; 4.
 Ghasemian M., Nejat A.; Aero-acoustics prediction of a vertical axis wind turbine using Large Eddy Simulation and acoustic analogy; Energy 2015; 711-717.
 Mohamed H. H., Ali A. M., Hafiz A. A.; CFD analysis Journal for H-rotor Darrieus turbine as a low speed wind energy converter; Engineering Science and Technology; 2015; 1-13.
 Laiping Z., Ming L., Wei L., Xin H., An implicit algorithm for high-order DG/FV schemes for compressible flows on 2D arbitrary grids, Communications in Computational Physics, 17 (1), 287-316, 2015.
 FLUENT Theory Guide14.0, 2013.
 Zafer B., Coşgun F., Zamana Bağlı Sıkıştırılamaz Kavite Akışının Aeroakustik Analizi, Journal of the Faculty of Engineering and Architecture of Gazi University 31:3, 2016, 665-675.
 Hang N., Xıe H., Wang X., Wu B., Computation of Vortical Flow and Flow Induced Noise by Large Eddy Simulation with FW-H Acoustic Analogy and Powell Vortex Sound Theory, Journal of Hydrodynamics, 2016, 28(2):255-266.
 Di Francescantonio P., A New Boundary Integral Formulation for the Prediction of Sound Radiation, Journal of Sound and Vibration, 1997, 202(4): 491-509.
 Hang N., Research on Mechanism and Hybrid Computation Approach for Cavity Flow and Flow Induced Noise, Doctoral Thesis, Wuxi, China: China Ship Scientific Research Center, 2010.
 Menter, F. R., "Zonal Two Equation k-ω Turbulence Models for Aerodynamic Flows", AIAA Paper 93-2906, 1993.
 Menter, F. R., "Two-Equation Eddy-Viscosity Turbulence Models for Engineering Applications", AIAA Journal, vol. 32, no 8. pp. 1598-1605, 1994.
 Brooks, T. F., Pope, D. S., Marcolini, M. A, 1989. Airfoil Self-Noise and Prediction. NASA RP 1218.
 Gregory, N., O'Reilly, C. L., 1973. Low-Speed Aerodynamic Characteristics of NACA0012 Aerofoil Section, Including the Effects of Upper-Surface Roughness Simulating Hoar Frost. Aeronautical Research Council Reports and memoranda. 3726.
 Abbott, I. H., Von-Doenhoff, A. E., 1959. Theory of Winging Sections, ıncluding a Summary of Airfoil Data, Dover Publications, Mineola, NY, USA.
 Zhang N., Xie H., Wang X., Wu B., Computation of vortical flow and flow induced noise by large eddy simulation with FW-H acoustic analogy and Powell vortex sound theory, Journal of Hydrodynamics, 2016, 28(2):255-266.