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Soft Recovery of Gun Launched Supersonic Projectiles in Long Column of Compressed Air & Water

ANKUR TRIGUNAYAK, ASHISH SAINI, VIJAY KUMAR, RANJEET KUMAR, J. SANTHOSARAJAN, PRAVENDRA KUMAR

Abstract


This paper discusses about development of testing methodology where fuze electronics is exposed to severe gun launch acceleration and softly recovered in decelerating setup so that survivability of fuze electronics can be tested against severe gun launch exclusively. An indoor facility based on ballistic compression concept has been developed. This consist of 40 mm smooth bore gun to launch the projectile and 33m long tube having slotted section, free air section, pressurised air section and incompressible water section separated by composite diaphragms. Parametric study was carried out in NASTRAN & AUTODYN using explicit analysis in Eulerian and Lagrangian domain to simulate supersonic projectile deceleration profile in compressed air column followed by water column. An ogive-nose cylindrical projectile was launched by gun in muzzle velocity range of 350 m/s to 800 m/s and successfully recovered in this designed soft recovery setup. Simulation results were found in correlation with experimental results.


DOI
10.12783/ballistics2019/33135

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