Vaporization and gas-phase combustion of electrosprayed heptane in a small chamber

Higuera Antón, Francisco and Tejera, J.M. (2017). Vaporization and gas-phase combustion of electrosprayed heptane in a small chamber. "Combustion and Flame", v. 177 ; pp. 144-154. ISSN 0010-2180. https://doi.org/10.1016/j.combustflame.2016.12.015.

Description

Title: Vaporization and gas-phase combustion of electrosprayed heptane in a small chamber
Author/s:
  • Higuera Antón, Francisco
  • Tejera, J.M.
Item Type: Article
Título de Revista/Publicación: Combustion and Flame
Date: 2017
ISSN: 0010-2180
Volume: 177
Subjects:
Freetext Keywords: Spray combustion; Mesoscale combustors; Eulerian/Lagrangian modeling
Faculty: E.T.S. de Ingeniería Aeronáutica y del Espacio (UPM)
Department: Mecánica de Fluidos y Propulsión Aeroespacial
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

A model is formulated of the vaporization and gas-phase combustion of a dilute spray of electrically charged droplets of heptane with a coflow of preheated air in a mesoscale combustion chamber. The model includes an Eulerian/Lagrangian treatment of the gas and the droplets, an equilibrium vaporization submodel, and a single step mechanism for the combustion of heptane vapor. The effects of the inlet air temperature, the fuel flow rate and the overall equivalence ratio are investigated. Two combustion modes are described for globally lean systems. When rapid vaporization leads to a kernel of high fuel vapor concentration, combustion may begin before the fuel diffuses in the air coflow, in a layer of intense reaction that locally depletes the oxygen and leaves behind a region of high temperature fuel vapor surrounded by a diffusion flame. When the vaporization rate and the maximum fuel vapor concentration are decreased by increasing the size of the droplets or the inlet velocity of the air, combustion occurs in a lifted lean premixed flame after the fuel has fully vaporized and mixed with the air coflow. Ignition and extinction conditions are discussed. The degree of accuracy that can be expected from the single step reaction mechanism is also discussed.

Funding Projects

TypeCodeAcronymLeaderTitle
Government of SpainDPI2013-47372-C02-02UnspecifiedUnspecifiedUnspecified
Government of SpainCSD2010-00011UnspecifiedUnspecifiedUnspecified

More information

Item ID: 50876
DC Identifier: http://oa.upm.es/50876/
OAI Identifier: oai:oa.upm.es:50876
DOI: 10.1016/j.combustflame.2016.12.015
Official URL: https://www.sciencedirect.com/science/article/pii/S0010218016303789
Deposited by: Memoria Investigacion
Deposited on: 01 Aug 2018 09:58
Last Modified: 01 Jan 2020 23:30
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