Complex Numerical Simulation And Aerodynamic Analysis

In the dissertation, the technique of mesh generation for model with complicated figure is researched by numerically simulating the states of takeoff, landing and cruise of X-plane. The result of calculation is analysed by the theory of aerodynamics.The muilt-block point to point grid is adopted for mesh generation, and some methods and skills of mesh generation for model with complicated figure is concluded. RANS equation is adopted for numerical simulation. The convective terms are discretized using upwind flux-difference-splitting technique of Roe. An implicit approximate factorization method is used to advance in time.The solver which is described above is validated by the simulation of DLR-F4.The results of calculation accord with experiment well. It proved than the method is suitable for simulating the flow field of model with complicated figure. The following states are calculated in this thesis:(l) taking off, with flapdeflexing 20°. (2)landing, with flap deflexing 40° (3)cruise. The flowfield andpressure nephogram is analysed, which demonstrates that the result is reasonable and accord with the character of true flowfield. In the end ,we compare with the results computed by MGAERO.Finally ,the state of taking off and landing with slip stream produced by the propeller is simulated, and the effect of slip stream to plane is analysed.