Experimental and Numerical Investigation of Phase Separation due to Multi-Component Mixing at High-Pressure Conditions

摘要: Experiments and numerical simulations were carried out in order to contribute a better understanding prediction of high-pressure injection into gaseous environment. Specifically, the focus was put on phase separation processes an initially supercritical fluid due interaction with its surrounding. N-hexane injected chamber filled pure nitrogen at 5 MPa 293 K three different test cases selected such that they cover regimes which thermodynamic non-idealities, particular effects stem from potential separation, are significant. Simultaneous shadowgraphy elastic light scattering experiments conducted capture both flow structure as well separation. In addition, large-eddy vapor-liquid equilibrium model performed. Both experimental results show formation for cases, where a-priori calculation predicts two-phase flow. Moreover, qualitative characteristics process agree between transition behaviour dense-gas spray-like jet captured by both.