Title: Numerical simulation of unsteady 3D air-water turbulent flow in a water cannon

Authors: Min Zeng, Feng Xue, Haibin Zhu, Qiuwang Wang, Renjun Zhan

Addresses: MOE Key Laboratory of Thermo-Fluid Science and Engineering, Xi'an Jiaotong University, Xi'an 710049, China. ' MOE Key Laboratory of Thermo-Fluid Science and Engineering, Xi'an Jiaotong University, Xi'an 710049, China. ' MOE Key Laboratory of Thermo-Fluid Science and Engineering, Xi'an Jiaotong University, Xi'an 710049, China. ' MOE Key Laboratory of Thermo-Fluid Science and Engineering, Xi'an Jiaotong University, Xi'an 710049, China. ' APF Key Laboratory of Non-Lethal Weapons, Engineering College of CAPF, Xi'an 710086, China

Abstract: A numerical study for the 3D unsteady structure of air-water flow of a water cannon has been carried out. As the Reynolds number of fluid is high, coupling with Large Eddy Simulation (LES), the Volume of Fluid (VOF) and Continuum Surface tension Force (CSF) method, the high-speed turbulent flow has been computed. The influences of electrovalve|s opening and cannon|s inclination on internal dynamics of two-phase in barrel and atomisation of jet have been investigated in detail. The driving forces of air, jet core length, spray angle, and the velocity field are obtained from the computational results.

Keywords: water cannon; air-water turbulent flow; air flow; water flow; large eddy simulation; LES; volume of fluid; VOF; continuum surface tension force; CSF; electrovalve opening; cannon inclination; jet pulse; jet core length; spray angle; velocity field; modelling; jet atomisation; 3D unsteady structures; CFD; computational fluid dynamics.

DOI: 10.1504/PCFD.2011.041019

Progress in Computational Fluid Dynamics, An International Journal, 2011 Vol.11 No.3/4, pp.189 - 197

Published online: 28 Jun 2011 *

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