interactive thermodynamics 3.2 show more decimal command

(SNL-CA), Livermore, CA (United States) Sponsoring Org.: USDOE Office of Energy Efficiency and Renewable Energy (EERE), Transportation Office. Publication Date: Research Org.: Sandia National Lab.

City Univ., London (United Kingdom) Sandia National Lab.

Analysis of the vortex evolution indicates that driving mechanisms behind the jet break-up are vortex tilting/stretching, then baroclinic torque, leading to Rayleigh-Taylor instabilities, closely followed by vortex dilation and finally viscous effects. Identified liquid and vapour penetration are compared against experimental data from the ECN database showing a good agreement, within approximately 3–8% for axial penetration of liquid, 2% for vapor axial penetration and within experimental uncertainty for radial distribution of mass fraction.

Here NIST REFPROP properties are used, combined with PC-SAFT Vapor-Liquid-Equilibrium to identify the liquid in mixtures penetration, hence avoiding the use of an arbitrary threshold for mass fraction. The tabulation approach is directly extensible to any thermodynamic model, existing or to be developed in the future. A tabulated thermodynamic approach is proposed here, based on log 10(p)-T tables, providing very high accuracy across a large range of pressures, spanning from 0 to 2500 bar, with only a small number of interpolation points.

The present work investigates the complex phenomena associated with pressure/high temperature dodecane injection for the Engine Combustion Network (ECN) Spray-A case, employing more elaborate thermodynamic closures, to avoid well known deficiencies concerning density and speed of sound prediction using traditional cubic models.

Interactive thermodynamics 3.2 show more decimal command