Validation of CFD simulation of recoilless EOD water cannon by firing experiments with high speed camera

8th TSME-International Conference on Mechanical Engineering

Chantrasmi, Tonkid^1 ; Hongthong, Premsiri^1 ; Kongkaniti, Manop^1

Department of Mechanical and Aerospace Engineering, King Mongkut's University of Technology North Bangkok, Bangkok

10800, Thailand^1

关键词: CFD simulations;    Computational fluid dynamics simulations;    Exit velocity;    Explosive ordnance disposal;    High Speed;    Improvised explosive devices;    Off-the-shelf components;    Water jets;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/297/1/012067/pdf
DOI  :  10.1088/1757-899X/297/1/012067

来源: IOP

【 摘 要 】

Water cannon used by Explosive Ordnance Disposal (EOD) were designed to propel a burst of water jet moving at high speed to target and disrupt an improvised explosive device (IED). The cannon could be mounted on a remotely controlled robot, so it is highly desirable for the cannon to be recoilless in order not to damage the robot after firing. In the previous work, a nonconventional design of the water cannon was conceived. The recoil was greatly reduced by backward sprays of water through a ring of slotted holes around the muzzle. This minimizes the need to manufacture new parts by utilizing all off-the-shelf components except the tailor-made muzzle. The design was then investigated numerically by a series of Computational Fluid Dynamics (CFD) simulations. In this work, high speed camera was employed in firing experiments to capture the motion of the water jet and the backward sprays. It was found that the experimental data agreed well with the simulation results in term of averaged exit velocities.