A study of thin-flame quasisteady sphericosymmetric combustion of multicomponent fuel droplets. Part I: modelling for droplet surface regression and non-unity gas-phase Lewis number

Abstract

A model for sphericosymmetric thin‐flame combustion of multicomponent fuel droplets has been developed in the first part of this two‐part work. The model incorporates effects of droplet surface regression and gas‐phase Lewis number. It is observed that both these effects affect the results substantially. The study also reveals the transient nature of the combustion process. Copyright © 1999 John Wiley and Sons, Ltd.

Analysis of evaporation of dense cluster of bicomponent fuel droplets in a spray using a spherical cell model

“…The surface temperature and concentration at R c = 7 and 7.5 indicate that both the species simultaneously evaporate till the end. This in sharp distinction to the rapid depletion of the volatile component observed in isolated droplets [15].…”

“…The code has been validated in our earlier work [15] for isolated bicomponent droplets. We did not find any experimental or theoretical results for validating the predictions for evaporation of bicomponent fuel droplets in a dense spray.…”

“…All results correspond to a composition of 99% heptane and ambient pressure and temperature of 1 bar and 1000 K respectively. The choice of the composition of the droplet is guided by our earlier observation [15] that binary characteristics are most distinctively observed when the component with higher boiling point is added in small quantities. The results are for a constant ambient pressure.…”

A study of thin‐flame quasisteady sphericosymmetric combustion of multicomponent fuel droplets. Part II: parametric studies

“…In fact, low pressure quasisteady models have also been used by Kneer et al (1993) and Lage et al (1993) at a pressure as high as 10 bar. However, the suitability of the phase equilibrium model developed in the companion paper (Mukhopadhyay and Sanyal, 1999) has been tested by comparing the results obtained using this model with those obtained by using an empirical relation that takes into account variation of latent heat with temperature. The particular model used here is the Gomez-Thodos equation.…”

Extended Shvab–Zel’dovich formulation for multicomponent-fuel diffusion flames

“…Also, numerical works [3][4][5] on multicomponent fuel droplet combustion used a single flame model to describe the burning of mixtures of heptane-hexadecane, n-heptane-decane and heptane-octane.…”