Titre : Drop vaporization frequency response: an approximate analytical solution for mixed injection regimes 

Auteurs : Kwassi Anani, Roger Prud’homme, Mahouton Norbert Hounkonnou,  

Revue : Thermodynamics of Interfaces and Fluid Mechanics 

Numéro : Issue 1 

Volume : 5 

Date : 2021/10/29 

DOI : 10.21494/ISTE.OP.2021.0748 

ISSN : 2514-4642 

Résumé : The vaporisation frequency response due to pressure oscillations is analysed for a spray of repetitively injected drops into a combustion chamber.  In the Heidmann analogy, this vaporizing spray is represented by the so-called ‘mean droplet’, which is a continuously fed spherical droplet at rest inside the combustion chamber. Only radial thermal convection and conduction effects are considered inside the vaporizing mean droplet since the feeding is realized symmetrically with the same liquid fuel, using a point source placed at the centre. This feeding process, at some liquid-liquid heat transfer coefficient, is now considered as a proper boundary condition of the generalized feeding regime, which controls the whole fuel injection process into the chamber. Effects due to the variation of the heat transfer coefficient are analysed for the evaporating mass response factor, calculated on the basis of the Rayleigh criterion. A chaotic response is especially noticed in the process when the heat transfer coefficient is fixed at unity. 

Éditeur : ISTE OpenScience