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OPTIMAL　DESIGN　AND　AERODYNAMIC　CALCULATION　OF　WING　CONFIGURATION　OF　CIVIL　AIRCRAFT

Transactions of Nanjing University of Aeronautics and Astronautics 1994年第2期11卷 165-169页

作者： Wang Liangyi(Department of Aerddynamics,NUAA 29 Yudao Street,Nanjing 210016,P.R.China)

An effective method of optimal design of wing configuration is provided. The SUMT (sequential unconstained minimization technique) method is a good technique for solving the nonlinear programming. The application of penalty in optimal design of wing configuration has been solved well. The present method for the aerodynamic calculation is the combination of both the nonlinear panel method and the suction analogy method of vortexlift spanwise distribution on large swept wing-tip. The calculation results are in good agreement with experimental data. According to the computation and experiment,the mechanism of the increased lift and reduced drag about the sheared wing-tip wing has been analyzed, and some opinions of interest are proposed.

关键词： optimum design aerodynamic computations civil aircraft sheared wing-tip wing penalty function

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Numerical Methods for Solving Turbulent Flows by Using Parallel Technologies

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Journal of Computer and Communications 2013年第1期1卷 1-5页

作者： Alibek Issakhov Department Mechanics and Mathematics al-Farabi Kazakh National University Almaty Kazakhstan

Parallel implementation of algorithm of numerical solution of Navier-Stokes equations for large eddy simulation (LES) of turbulence is presented in this research. The Dynamic Smagorinsky model is applied for sub-grid simulation of turbulence. The numerical algorithm was worked out using a scheme of splitting on physical parameters. At the first stage it is supposed that carrying over movement amount takes place only due to convection and diffusion. Intermediate field of velocity is determined by method of fractional steps by using Thomas algorithm (tridiaginal matrix algorithm). At the second stage found intermediate field of velocity is used for determination of the field of pressure. Three dimensional Poisson equation for the field of pressure is solved using upper relaxation method. Moreover various ways of geometrical decomposition for parallel numerical solution of three dimensional Poisson equations are investigated.

关键词： Domain Decomposition Parallel computations Dynamic Smagorinsky Model LES Approach

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