Numerical simulation study of jet spray combustion in high-temperature and high-pressure environments

Abstract

Under the CONVERGE software platform, different combustion models and soot models were coupled to numerically simulate the turbulent combustion process and soot formation characteristics of n-dodecane. The predicted combustion characteristics and soot formation characteristics were compared and analyzed against experimental values. The results show that the UFPV combustion model provides higher accuracy in predicting the ignition delay and flame lift-off length compared to the WM combustion model. When each of the two combustion models is coupled with the Gokul soot model, the WM combustion model demonstrates higher accuracy in predicting the steady-state soot mass, while the UFPV combustion model exhibits superior accuracy in locating the soot core region and is highly sensitive in capturing the rising process of the soot volume fraction.