Research And Simulation Of The3D Unsteady Flow Around Airfoil

The phenomena of flow around exist widely in the real life. The flow around awing in this paper is the three-dimensional turbulent and is one of the commonproblems in the flow around the flow phenomenon, with such characteristics:unstable and rotating. It contains rich fluid characteristics and mechanism,especially in the wing junction formation of separated vortex flow. Threedimensional flow field of the flow around a wing not only determines the wing itselfand the fluid dynamic performance, but also impact on the around flow field. Theflow around a wing phenomenon is very complex, but with modern aircraft workingconditions more demanding, people need to understand the nature of the wingunsteady flow, in order to improve the performance of the aircraft. The flow arounda wing is always a hot topic in the research field. The flow around a wing is variousunder the different dimensions or different turbulence models.At first, the three-dimensional flow field around the wing is simulated by usingdifferent turbulence models. And find the turbulence model which’s simulationconclusions more conform to the experimental data by results comparison.Next, for a more systematic understanding of the influence of the single factor(Mach number, angle of attack, etc.) on the wing three-dimensional unsteady outflowof the field, The article also went on to set the Mach number through a differentangle of attack simulation to get a wing three-dimensional flow field with thevariation in the angle of attack, the main consideration of the influence of the angleof attack are four areas, which are the pressure distribution of the outside field of thewing, the mass density distribution in the flow field, the flow field Mach numberdistribution and the flow field static temperature distribution; last for a fixed angleof attack, while the Mach number of different variety of flow conditions, using theselected turbulence model for simulation, and the above-mentioned issues arediscussed.In this paper, I set the corresponding drag and lift coefficients monitor inFLUENT monitor, to follow-up observations on the wing lift and drag coefficient,not only to record the trend of the simulation results of the lift and drag coefficientunder different turbulence models, and to further record the change rules of the liftand drag coefficients and other parameters in the different simulation conditions. Finally, the vortex structure of the three-dimensional flow field under the wingtail analysis by simulating the reproduction of the specific shape of the vortexstructures and the dynamic pressure and dynamic pressure vector distribution, speedand velocity vector distribution, temperature and temperature vector distributions ofthe vortex structure are simulated and analyzed.