Numerical Simulation and Experimental Study on Noise Field of Large Caliber Gun
The muzzle shock wave generated by the launch of large-caliber guns will cause damage to equipment and personnel in the gunner's area.In order to study the distribution law of the noise field during the launch of large-caliber guns,a 3D simulation model of the gun calculation area was estab-lished based on the finite volume method,the SST k-ω model and the solid model of a gun.The change law of the overpressure of the gunner's area over time under different internal ballistic parame-ters was calculated by the dynamic grid technology,and the calculation reliability was confirmed by comparing with the experiment results.The calculation results show that the high pressure and high speed gas continuously develops after flowing out from the side hole and muzzle,forms a periodic pres-sure expansion wave around the gun and affects the gunner's area.In terms of the overall noise distri-bution law,the noise in the gunner's area is concentrated in the symmetry plane of the gun model and near the ground.At the same time,the overall noise level increases with the increase of the charge due to the differences of internal ballistic parameters.The calculation results provide an effective reference for analyzing the internal relationship between internal ballistic parameters and the noise distribution law in gunner's area.
万方数据
维普
