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http://dx.doi.org/10.5139/JKSAS.2008.36.11.1039

Calculation of Low Aspect Ratio Wing Aerodynamics by Using Nonlinear Vortex Lattice Method  

Lee, Tae-Seung (한국과학기술원 항공우주공학전공 대학원)
Park, Seung-O (한국과학기술원 항공우주공학전공)
Publication Information
Journal of the Korean Society for Aeronautical & Space Sciences / v.36, no.11, 2008 , pp. 1039-1048 More about this Journal
Abstract
new computational procedure for the Non-Linear Vortex Lattice Method (NLVLM) is suggested in this work. Conventional procedures suggested so far usually involves inner iteration loop to update free vortex shape and an under-relaxation based iteration loop to determine the free vortex shape. In this present work, we suggest a new formula based on quasi-steady concept to fix free vortex shape which eliminates the need for inner iteration loop. Further, the ensemble averaging of the induced velocities for a given free vortex segment evaluated at each iteration significantly improves the convergence property of the algorithm without resorting to the under-relaxation technique. Numerical experiments over several low aspect ratio wings are carried out to obtain optimal empirical parameters such as the length of the free vortex segment, the vortex core radius, and the rolled-up wake length.
Keywords
Nonlinear Vortex Lattice Method; Low Aspect Ratio Wing; inner iteration loop; under-relaxation technique; free vortex segment length;
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1 Kandil, O. A., Mook, D. T., and Nayfeh, A. H., "Nonlinear Prediction of Aerodynamic Loads on Lifting Surfaces", J. Aircraft, Vol. 13, No. 1, pp. 22-28, 1976.   DOI   ScienceOn
2 Almosnino, D. and Rom, J., "Calculation of Symmetric Vortex Separation Affecting Subsonic Bodies at High Incidence", AIAA J., Vol. 21, No. 3, pp. 398-406, 1983.   DOI   ScienceOn
3 Rusak, Z., Seginer, A. and Wasserstrom, E., "Convergence Characteristics of a Vortex-Lattice Method for Nonlinear Configuration Aerodynamics", J. Aircraft, Vol. 22, No. 9, pp. 743-749, 1985.   DOI   ScienceOn
4 Luckring, J. M., "Comments on 'Convergence Characteristics of a Vortex-Lattice Method for Nonlinear Configuration Aerodynamics", J. Aircraft, Vol. 23, No. 10, pp. 798-799, 1986.   DOI
5 Vinkelmans, G. S. and Leonard, A., "Contributions to Vortex Particle Methods for the Computation of Three-Dimensional Incompressible Unsteady Flows", J. Comp. Physics, Vol. 109, pp. 247-273, 1993.   DOI   ScienceOn
6 Mook, D. T. and Maddox, S. A., "Extension of a Vortex-Lattice Method to Include the Effects of Leading-Edge Separation", J. Aircraft, Vol. 10, No. 6, pp. 127-128, 1974.
7 Almosnino, D., "High Angle-of-Attack Calculations of the Subsonic Vortex Flow on Slender Bodies", AIAA J., Vol. 23, No. 8, pp. 1150-1156, 1985.   DOI   ScienceOn
8 Rom, J., Zorea, C., and Gordon, R., "On the Calculation of Non-Linear Aerodynamic Characteristics and the Near Vortex Wake", ICAS PAPERS, 1974.
9 Rom, J, "High Angle of Attack Aerodynamics: Subsonic, Transonic, and Supersonic Flows", Springer-Verlag, 1992.
10 Katz, J. and Plotkin, A., "Low-Speed Aerodynamics: from Wing to Panel Method", McGraw-Hill, 1991.
11 Rusak, Z., Wasserstrom, E. and Seginer, A., "Numerical Calculation of Nonlinear Aerodynamics of Wing-Body Configurations", AIAA J., Vol. 21, No. 7, pp. 929-936, 1983.   DOI   ScienceOn
12 김규하, 손병진, 조진수, "비선형 와류격자법을 이용한 날개의 3차원 공력해석", 한국항공우주학회지, 제 23권 제 4호, pp. 14-22, 1995.
13 Rom, J., Melamed, B. and Almosnino, D., "Experimental and Nonlinear Vortex Lattice Method Results for Various Wing-Canard Configurations", J. Aircraft, Vol. 30, No. 2, pp. 207-212, 1993.   DOI   ScienceOn
14 김용철, 조진수, "비선형 와류격자법을 이용한 삼각날개의 공력해석", 한국항공우주학회지, 제 24권 제 6호, pp. 21-30, 1996.
15 Rusak, Z., Seginer, A. and Wasserstrom, E., "Reply to Authors to J. M. Luckring", J. Aircraft, Vol. 23, No. 10, pp. 799-800, 1986.   DOI