این سایت در حال حاضر پشتیبانی نمی شود و امکان دارد داده های نشریات بروز نباشند
Journal of Applied Fluid Mechanics، جلد ۱۶، شماره ۸، صفحات ۱۵۴۴-۱۵۵۹
عنوان فارسی
چکیده فارسی مقاله
کلیدواژه‌های فارسی مقاله
عنوان انگلیسی Assessment of Turbulence Models for Unsteady Separated Flows Past an Oscillating NACA 0015 Airfoil in Deep Stall
چکیده انگلیسی مقاله This paper provides 2D Computational Fluid Dynamics (CFD) investigations, using OpenFOAM package, of the unsteady separated fully turbulent flows past a NACA 0015 airfoil undergoing sinusoidal pitching motion about its quarter-chord axis in deep stall regime at a reduced frequency of 0.1, a free stream Mach number of 0.278, and at a Reynolds number, based on the airfoil chord length, , of . First, eighteen 2D steady-state computations coupled with the SST model were carried out at various angles of attack to investigate the static stall. Then, the 2D Unsteady Reynolds-Averaged Navier-Stokes (URANS) simulations of the flow around the oscillating airfoil about its quarter-chord axis were carried out. Three eddy viscosity turbulence models, namely the Spalart-Allmaras, Launder-Sharma , and  SST were considered for turbulence closure. The results are compared with the experimental data where the boundary layer has been tripped at the airfoil’s leading-edge. The findings suggest that the  SST performs best among the other two models to predict the unsteady aerodynamic forces and the main flow features characteristic of the deep stall regime. The influence of moving the pitching axis downstream at mid chord was also investigated using URANS simulations coupled with the  SST model. It was found that this induces higher peaks in the nose-down pitching moment and delays the stall onset. However, the qualitative behavior of the unsteady flow in post-stall remains unchanged. The details of the flow development associated with dynamic stall were discussed
کلیدواژه‌های انگلیسی مقاله Dynamic stall, Deep stall, Turbulence modeling, Numerical simulation, Navier-Stokes Equations
نویسندگان مقاله S. Ouchene |
Laboratory of Green and Mechanical Development-LGMD, Ecole Nationale Polytechnique, B.P. 182, El-Harrach, Algiers, 16200, Algeria

A. Smaili |
Laboratory of Green and Mechanical Development-LGMD, Ecole Nationale Polytechnique, B.P. 182, El-Harrach, Algiers, 16200, Algeria

H. Fellouah |
Department of mechanical engineering, Université de Sherbrooke, 2500 Boulevard de l’Université, Sherbrooke, Québec, J1K2R1 Canada

نشانی اینترنتی https://www.jafmonline.net/article_2242_61894476d259321053521c30ee9b54fb.pdf
فایل مقاله فایلی برای مقاله ذخیره نشده است
کد مقاله (doi)
زبان مقاله منتشر شده en
موضوعات مقاله منتشر شده
نوع مقاله منتشر شده
برگشت به: صفحه اول پایگاه   |   نسخه مرتبط   |   نشریه مرتبط   |   فهرست نشریات