Browse > Article
http://dx.doi.org/10.5139/JKSAS.2005.33.12.001

Unsteady Flow Analysis around an Elliptic Cylinder at Various angles of Attack: Drag and Lift Forces  

Park, Young-Bin (한국항공대학교 항공우주공학과 대학원)
Kim, Moon-Sang (한국항공대학교 항공우주 및 기계공학부)
Kim, Hark-Bong (한국항공대학교 항공우주 및 기계공학부)
Publication Information
Journal of the Korean Society for Aeronautical & Space Sciences / v.33, no.12, 2005 , pp. 1-8 More about this Journal
Abstract
A parametric study has been accomplished to figure out the effects of the elliptic cylinder thickness, angle of attack, and Reynolds number on the lift and drag forces exerted on the elliptic cylinder. A two-dimensional incompressible Navier-Stokes flow solver is developed using SIMPLER method to analyze the unsteady viscous flow over elliptic cylinder. Thickness-to-chord ratios of 0.2, 0.4, and 0.6 elliptic cylinders are simulated at different Reynolds numbers of 400 and 600, and angles of attack of $10^{\circ}$, $20^{\circ}$, and $30^{\circ}$. Through this study, it is observed that the elliptic cylinder thickness, angle of attack, and Reynolds number affect significantly not only the time-mean values and the amplitudes of the drag and lift forces but also the frequencies of the force oscillations.
Keywords
unsteady flow; SIMPLER method; elliptic cylinder; drag force; lift force; oscillation;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
연도 인용수 순위
1 Badr, H. M, Dennis, S. C. R, and Kocabiyik, S., 'Numerical Simulation of the Unsteady Flow Over an Elliptic Cylinder at Different Orientations', International Joumal for Numerical Methods in Fluids, vol. 37, 2001, pp. 905-931   DOI   ScienceOn
2 Blevins, R D., 'Flow-Induced Vibration', 2nd edition, Malabar, Krieger Publishing, 2001
3 Nair, M. T. and Sengupta, T. K, 'Onset of Asymmetry: Flow Past Circular and Elliptic Cylinders', International Journal for Numerical Methods in Fluids, vol. 23, 1996, pp. 1327-1345   DOI   ScienceOn
4 Patel, V. A, 'Flow Around the Impulsively Started Elliptic Cylinder at Various Angles of Attack', Computers and Fluids, vol. 9, No.4, 1981, pp. 435-462   DOI   ScienceOn
5 Chou, M. H. and Huang, W., 'Numerical Study of High-Reynolds-Number Flow Past a Bluff Object', International Journal for Numerical Methods in Fluids, vol. 23, 1996, pp. 711-732   DOI   ScienceOn
6 Kim, M.S. and Sengupta, A, 'Unsteady Viscous Flow over Elliptic Cylinders at Various Thickness with Different Reynolds Numbers', Journal of Mechanical Science and Technology, Vol. 19, No.3, 2005, pp. 877-886   DOI   ScienceOn
7 Ota, T., Nishiyama, H., and Taoka, Y.,'Flow Around an Elliptic Cylinder in the Critical Reynolds Number Regime', Journal of Fluids Engineering, vol. 109, 1987, pp. 149-155   DOI
8 Williamson, C. H. K, 'Vortex Dynamics in the Cylinder Wake', Annual Review of Fluid Mechanics, vol. 28, 1996, pp. 477-539   DOI   ScienceOn