An Overview Modeling Approach for Spontaneous Condensation Flow of Cryogenic Turboexpander

Abstract

AbstractThe modification of the mathematical model for spontaneous condensation flow of nitrogen fluid. The Mathematical model has been put into effect for the computation of nucleation rate, droplet growth rate. Euler/Euler two-fluid model can be used for heat and mass transfer which is in gas and liquid phases. Different nucleation theory is implemented for nucleation rate calculation can be justified with experimental data. For turboexpander flow analysis simulation ANSYS CFX is used in which we use a different module like Turbo grid, blade gen, CFX-Pre, CFX-Post. The calibration of the value of nucleation rate by adjusting the value of the different factors. That gives the prediction of Wilson’s point. The formation of new nuclei and condensation onset for spontaneous condensation flow of nitrogen fluid. The value of f = 4.6 gives a better prediction of Wilson’s point. Nucleation rate effect upon rotation and flow analysis of impeller blade has also been analyzed. The non-isothermal effect of classical nucleation theory gives a superior estimate of the nucleation rate of nitrogen. Then prediction of pressure drops, condensation onset, and supercooling has been improved for nitrogen spontaneous condensation flow. Droplet growth rate and the number of droplets formed are important criteria for understanding the flow analysis. The implementation of a new factor in the calculation of nucleation and droplet rate can give a better prediction of Wilson point and condensation onset.KeywordsTurboexpanderNucleation rateDroplet growth rateWilson pointCondensation onset