A Computational Study of the Gas-Solid Suspension Flow through a Supersonic Nozzle

Jian Guo Sun, Heuy Dong Kim, Jin Ouk Park, Ying Zi Jin

College of Mechanical Engineering & Automation, Zhejiang Sci-Tech University, Hangzhou, China.
School of Mechanical Engineering, Andong National University, Andong, Korea.

DOI: 10.4236/ojfd.2012.24A028                

Abstract

The present study focuses on numerical simulation of the gas-solid suspension flow in a supersonic nozzle. The Euler- Lagrange approach using a Discrete Phase Model (DPM) has been used to solve the compressible Navier-Stokes equa- tions. A fully implicit finite volume scheme has been employed to discretize the governing equations. Based upon the present CFD results, the particle loading effect on gas-solid suspension flow was investigated. The results show that the presence of particles has a big influence on the gas phase behavior. The structure of shock train, the separation point, and the vortex of the backflow are all related to particle loading. As the particle loading increases the flow characteris- tics behave differently such as 1) the strength of shock train decreases, 2) the separation point moves toward the nozzle exit, 3) the number and strength of vortex increase, 4) the strength of first shock also increases while the other pseudo shocks decreases. The change of gas flow behavior in turn affects the particle distribution. The particles are concen- trated at the shear layers separated from the upper wall surface.

Keywords

Gas-Solid Suspension Flow; Supersonic Nozzle; Flow Choking; Internal Flow; Shock Wave

Conflicts of Interest

The authors declare no conflicts of interest.

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