Higher Order DNS on an Airfoil Fx77-W500 Using Spectral/hp Method
reynolds number (RE), direct numerical simulation (DNS), spectral/hp elements method, polynomial orders (P), forces, contour plots., contour plots
Abstract
The prediction of aerodynamic properties of thick airfoils is a tricky business for the blade manufactures. Computational fluid dynamics (CFD) offers a number of significant advantages to investigate the flow properties around airfoils, however, most turbulence models are working properly except having some problems in case of turbulent separation. The spectral/hp elements method offers fast convergence due to the better resolution in a short time. Therefore, we perform direct numerical simulation (DNS) at the Reynolds number (Re) = 3900 , polynomial orders (P)=9 and an angle of attack of = 12 0 round an airfoil (Fx77-W500) using spectral/hp elements method to solve the unsteady, viscous and two dimensional (2D) incompressible Navier-Stocks equations. A frequent fluctuation of the lift and drag forces has been found over the entire time. The contour plots of pressure and velocity magnitude around the airfoil are investigated for certain cases, which show more vortices at the upper portion of the airfoil and around the trailing edge The presented results show that some interesting and peculiar behaviors due to unsymmetrical airfoil shape, which remind more of a bluff body, that the lift forces show negative value very frequently.
Downloads
How to Cite
References
B. Tony, S. David, J. Nick, Ervin (2001) Handbook of Wind Energy.
C. Flecther (2006) Computational Fluid Dynamics in Turbomachinery. 347-364. https://doi.org/10.1002/9781394273577.ch10
Joel Ferziger, Milovan Perić (2002) Computational Methods for Fluid Dynamics. https://doi.org/10.1007/978-3-642-56026-2
Bernhard St, Christian St, Andrei Sh, W. Claus, P. Joachim (2007) Analysing Flow Structures around a Blade Using Spectral/hp Method and HPIV. 75, 12025.
Bernhard St, S. Andrei, P. Joachim, Claus (2004) Simulation Dynamic Stall Using a Spectral/hp CFD- Code.
S. Dong, G. Karniadakis, A. Ekmekci, D. Rockwell (2006) A combined direct numerical simulation-particle image velocimetry study of the turbulent near wake. 569, 185-207. https://doi.org/10.1017/s0022112006002606
J. Monty, M. Chong (2009) Turbulent channel flow: comparison of streamwise velocity data from experiments and direct numerical simulation. 633, 461-474. https://doi.org/10.1017/s0022112009007769
George Karniadakis, Spencer Sherwin (1999) Spectral/hp Element Methods for Computational Fluid Dynamics. https://doi.org/10.1093/acprof:oso/9780198528692.001.0001
P. Richard, R. Francesca (2004) Spectral Element Methods on Triangles and Quadrilaterals: Comparisons and Applications. 198, 349-362.
S. Sherwin, G. Karniadakis (1995) A triangular spectral element method; applications to the incompressible Navier-Stokes equations. 123(1-4), 189-229. https://doi.org/10.1016/0045-7825(94)00745-9
Moshe Dubiner (1991) Spectral methods on triangles and other domains. 6(4), 345-390. https://doi.org/10.1007/bf01060030
George Karniadakis, Moshe Israeli, Steven Orszag (1991) High-order splitting methods for the incompressible Navier-Stokes equations. 97(2), 414-443. https://doi.org/10.1016/0021-9991(91)90007-8
Folkerts and (2010) Sodar Wind Velocity Measurements of Offshore Turbine Wakes. 25(5), 301-306. https://doi.org/10.1260/030952401760177873
Bernhard St, S. Andrei, P. Joachim, W. Claus (2006) Direct Numerical Simulation of the Turbulent Flow around an Airfoil Using Spectral/Hp Method.
N. Hubscher (1997) A user's guide to the felsia Nektar System.
Published
2013-05-30
Issue
Section
License
Copyright (c) 2013 Authors and Global Journals Private Limited
This work is licensed under a Creative Commons Attribution 4.0 International License.