Spreading Angle and Core Length Analysis of Supercritical Jets

Abstract

Density and density-gradient values were quantified for subcritical to supercritical jets, and a novel method was applied for calculating the core lengths using the structures detected across the entire jet center plane. Jet spreading angles were also calculated, and a model was proposed for the spreading angle dependence on the chamber-to-injectant density ratio. A detailed comparison was provided with existing theoretical models and experimental data for both core lengths and spreading angles. Single and binary species mixtures were used to study the injection and mixing characteristics of both subcritical and supercritical jets.