عنوان مقاله [English]
نویسندگان [English]چکیده [English]
In this paper, the main goals are investigation of missile with grid fins, determination of aerodynamics coefficient and calculation of fin span effects on performance of missile. We solved Navier-Stokes equations for achieving of them. Nowadays, with improvement of numerical algorithms and speeding up of computers processors, CFD is one of the most convenient and high accuracy methods for analysis. The first, we introduce the grid fins and then analyze a fin with different span to investigation of fin span effect on performance of missile. Finally, we mount two grid fins on missile body and carry out CFD calculations on total missile at different Mach and angle of attack to compute the flow field and aerodynamics coefficient for a missile with grid fins. The results have been validated by comparing the computed aerodynamic coefficients for the missile and individual grid fins against wind tunnel measurement data. Very good agreement with the measured data was observed for all investigated configurations.