Authors : Eduardo Antunes, Andre Silva and Jorge Barata
Abstract: In order to study the high pressure and high temperature operating condition of a variety of internal combustion engines such as modern diesel engines, gas turbines and liquid fuel rocket engines, a cryogenic nitrogen jet injected into supercritical chamber conditions was simulated numerically. The favre averaged navier-stokes equations were employed together with a “k-ε” Turbulence Model and using instead of an ideal gas equation of state, the Amagat’s law in an approach originally conceived for gaseous turbulent jets with variable density. The present study describes the assessment of the capabilities of the approach by comparison against experimental data as well as numerical simulation performed by other researcher. The obtained results show an acceptable agreement with experiments for the axial density distribution, failing slightly in the prediction of the jet potential core. Good agreement is observed for radial density distribution as well as for the jet spreading rate.
Eduardo Antunes, Andre Silva and Jorge Barata, 2017. Variable Density Approach for Modeling of Transcritical and Supercritical Jets. Journal of Engineering and Applied Sciences, 12: 5147-5159.