Browse > Article
http://dx.doi.org/10.5762/KAIS.2013.14.4.1533

A study for laminar and turbulent boundary layer theory around a Joukowski and NACA-0012 airfoil by CFD  

Je, Du-Ho (Department of Weapons and Mechanical Engineering, Korea Military Academy)
Hwang, Eun-Seong (Department of Defense Acquisition, Kwangwoon University)
Lee, Jang-Hyeoung (Department of Defense Acquisition, Kwangwoon University)
Publication Information
Journal of the Korea Academia-Industrial cooperation Society / v.14, no.4, 2013 , pp. 1533-1539 More about this Journal
Abstract
In the present study, we compared the theory with CFD data about the boundary layer thickness, displacement thickness and momentum thickness. According to the freestream velocity, larminar and turbulent is decided and affect to the flow patterns around the airfoil The boundary layer thickness, displacement thickness and momentum thickness affect to the aerodynamic characteristics of the airfoil(e.g. lift, drag and pitching moment). The separation point is affected by varying angle of attack. In the present study, we used the Joukowski airfoil(c=1), and NACA0012 airfoil was used at CFD. The chord Reynolds number is $Re_c$=3,000, 700,000, respectively and the freestream velocity is 0.045, 10 m/s, respectively. In this paper, the data was a good agreement with that of experimental results, so we can analyze the various airfoil models.
Keywords
Boundary layer; Displacement thickness; Momentum thickness; Potential flow; Thwaites' method; Head method;
Citations & Related Records
연도 인용수 순위
  • Reference
1 I Currie, I.G., 1993, Fundamental Mechanics of Fluids, Second Edition, McGraw-Hill, International Editions, pp. 64-132.
2 White, F.M, 2006, Viscous Fluid Flow, Third Edition, McGraw-Hill, International Editions, pp. 399-498.
3 Thwaites, B., 1947, "On the Momentum Equation in Laminar Boundary Layer Flow", Reports and Memoranda, No. 2587.
4 Head, M.R., 1958, "Entrainment in the Turbulent Boundary Layer", Reports and Memoranda No. 3152.
5 Barlow, J. B., Rae,W. H. JR. and Pope, A. (1999), Low-speed Wind Tunnel Testing. 3rd ed. 288, 353-358, NewYork: Wiley.
6 Selig, M. S. and McGranahan, B. D. (2003). Wind tunnel aerodynamic tests of six airfoils for use on small wind turbines. Report. NREL / SR-500-34515.
7 Taira, K. and Colonius, T. (2009). Three-dimensional flows around low-aspect-ratio flat-plate wings at low Reynolds numbers. J. Fluids Mech. Vol. 623, 187-207. DOI: http://dx.doi.org/10.1017/S0022112008005314   DOI   ScienceOn
8 Selig, M. S. and Donovan, J. F., and Fraser, D. B. (1989). Airfoils at low speeds, Stokely, Virginia Beach, VA.
9 McCullough, G. B. and Gault, D. E. (1951). Examples of three representative types of airfoil-section stall at low speed. NACA TN-2502.