Abstract
Evaporation of a single ethanol droplet interacting with a premixed laminar CH4/air flame
Highlights
In order to obtain high energy efficiency in spray combustion applications, high rates of evaporation and rapid mixing of liquid fuel with the gas phase are desired
The temperature profiles for 1D adiabatic freely propagating and stagnation premixed CH4/air flames with COFFEE scheme are computed in Cantera at different equivalence ratios and the computed profile is fitted to the experimental field
Experiments are conducted in a stagnation flame burner configuration where the droplet is injected through a laminar, flat and stationary premixed CH4/air flames at ɸ=0.8, 0.9, 1.0 and 1.1
Summary
In order to obtain high energy efficiency in spray combustion applications, high rates of evaporation and rapid mixing of liquid fuel with the gas phase are desired. The vaporization characteristics and the initial properties of the droplet may affect the flame structure. Many studies report the evaporation of pure ethanol and its mixtures under several conditions from both experimental and numerical aspects [1,2,3,4]. The evaporation of an isolated single ethanol droplet interacting with a laminar premixed CH4/air flame is studied experimentally and numerically. The evaporation rate of the droplet is measured under different flame conditions and its dependency to the droplet initial diameter and gas temperature profile are investigated. The simulations are performed with the Spalding model under stagnant N2 atmosphere and burnt gas conditions at constant temperature and compared with the experimental results
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