Supervisor:
Southwest Ordnance Industry Bureau
Organizer:
Chongqing Ordnance Industry Society
Chongqing University of Technology
Chongqing University of Technology
Numerical simulation of high speed projectile discharge process
| DOI: | 10.11809/bqzbgcxb2023.12.010 |
| Keywords: | high speed projectiles; seawater outflow; moving grid; numerical simulation; super cavitation |
| Abstract: | In order to study the cavitation morphology and projectile motion changes during the exit of high speed projectiles at different speeds in seawater, the VOF model in Fluent was used, combined with the Schnerr and Sauer cavitation model, and a moving grid was used. Technology and a three dimensional six degree of freedom method were used to numerically simulate the projectile ejection process in seawater. It was found that when the projectile is ejected from seawater, the supercavitation that forms around the projectile will be elongated. The formation and size of the supercavitation can be affected by controlling the initial velocity of the projectile. At the initial moment of underwater projectile movement, the drag coefficient is the largest and reaches its peak value. The greater the initial speed, the greater the pressure peak generated in the water, and the faster the pressure and speed decay; but if the initial speed is too large, the pressure on the projectile in the water will be more unstable, so it is necessary to choose an appropriate speed to prevent the projectile from being affected by excessive unstable pressure during the water discharge process. |
| Issue: | Vol. 44 No. 12 (2023) |
| Published: | 2023-12-28 |
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