Computational Study of Swept-Fin Aerodynamic Heating for the 105mm M774
ARMY BALLISTIC RESEARCH LAB ABERDEEN PROVING GROUND MD
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The 105mm M774 is a high velocity, long 1d, fin stabilized projectile. Recent test firings by LCWSL at Yuma Proving Ground, Arizona, revealed that the stabilizing fins were being severely reduced in span due to aerodynamic heating. This brief computational study examines the in-depth temperature response of a thin, swept fin to aerodynamic heating for a series of fin geometries in an effort to determine if a minor design modification can be found which will result in improved performance of the swept fin. The computational results indicate that the aerodynamic heating can be significantly reduced by a relatively small increase in the sweep angle of the fin.
- Ammunition and Explosives