Experimental and numerical investigation of ester droplet combustion: Application to butyl acetate |
| |
| Institution: | 1. Sibley School of Mechanical and Aerospace Engineering, Cornell University, Ithaca, NY, 14853, USA;2. CRECK Modeling Lab, Department of Chemistry, Materials, and Chemical Engineering, Politecnico di Milano, Piazza Leonardo da Vinci 32, Milano 20133, Italy;3. Department of Mechanical and Aerospace Engineering, University of California, San Diego, CA, 92093, USA;1. Department of Engineering, University of Cambridge, Trumpington Street, Cambridge, CB2 1PZ, United Kingdom;2. Aerospace Research Centre, National Research Council Canada, 1200 Montreal Road, Ottawa, K1A 0R6, Canada;1. Center for Combustion Energy, Tsinghua University, Beijing 100084, China;2. Department of Energy and Power Engineering, Tsinghua University, Beijing 100084, China;3. Key Laboratory for Thermal Science and Power Engineering of Ministry of Education, Tsinghua University, Beijing 100084, China |
| |
| Abstract: | This paper presents an experimental and numerical study of the combustion of isolated n‑butyl acetate droplets in the standard atmosphere. Numerical simulations are reported using a model that incorporates unsteady gas and liquid transport, variable properties, and radiation. Three skeletal mechanisms of n‑butyl acetate, derived from a large detailed mechanism comprised of 819 species and 52,698 reactions, were used in the numerical simulations to evaluate the influence of the kinetic mechanism on burning. The reduced mechanisms comprised 212 species and 5413 reactions, 157 species and 3089 reactions, and 105 species and 1035 reactions. The numerical model did not include soot formation, though qualitatively mild sooting was noted only for droplets larger than 0.7 mm. The numerical predictions were in good agreement with experimental measurements of droplet and flame diameters. Flame extinction was numerically predicted which was attributed to a decrease of the characteristic diffusion time relative to the chemical time as droplet burned. Effects of initial droplet diameter on the evolution of maximum gas temperature (Tmax) and peak mole fractions of CO2 and CO are also examined numerically. |
| |
| Keywords: | |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
