نوع مقاله : مقاله پژوهشی
نویسندگان
1 دانشجوی دکتری، دانشگاه فردوسی، مشهد،مشهد، ایران
2 استاد، دانشگاه فردوسی، مشهد،مشهد، ایران
3 استادیار، دانشگاه فردوسی، مشهد،مشهد، ایران
چکیده
کلیدواژهها
عنوان مقاله [English]
نویسندگان [English]
Conventional Wrap-Around Fins (WAF) have unique aerodynamic characteristics, such as changing the roll moment direction with increasing Mach number and the nonlinearity of the aerodynamic coefficients. The placement of Wrap-Around Fins against each other eliminates their aberrant and non-linear aerodynamic characteristics and provides the condition with a less complicated guidance system. In this research, the effects of curvature of Opposite Wrap-Around Fins (OWAF) on the aerodynamic performance of the projectile has been investigated. This investigation has been done numerically, and the results were compared with the wind-tunnel accessible test data, which have good accuracy. The simulation has been carried out at a Mach number of 1.5 and an angle of attack of 0 and 5 degrees, assuming a turbulent compressible flow; the physics of the flow around the fins has been investigated. The results showed that increasing fins curvature increases lift and drag coefficients by 7% and pitch moment up to 20%. Also, the fin curvature eliminate flow separation in junction of fin leading edge and body.
کلیدواژهها [English]