Abstract：The computational fluid dynamics (CFD) method is used for numerical simulation of a free jet of fluid flowing through a small hole. The simulation results show that in the jet flow field, the fluid velocity in the center of the main flow region is high and stable, while the fluid velocity near the side wall of the main flow region decreases sharply due to the friction with the gas. In the aerosol region, the fluid velocity decreases and a gas-liquid dispersion state is formed. The fluid acceleration occurs in the small-hole, and with the increase of the hole diameter and initial fluid velocity, the acceleration of the fluid in the small-hole increases correspondingly. The variation of fluid acceleration gradually increases with the increase of the initial fluid velocity, while decreases with the increase of the hole diameter and approaches zero. In this paper, the simulation model of a small-hole jet at low fluid velocities is established, and the evolution processes of fluid jet at different hole diameters and initial velocities are obtained.
WANG Quan,LI Xiaojiang,CHEN Yong et al. Numerical Simulation of a Small-Hole Free Jet Flow Field Based on CFD Method[J]. 化学反应工程与工艺, 2019, 35(2): 129-137.
