Unsteady effects in droplet evaporation and combustión

Liñán Martínez, Amable and Crespo Martínez, Antonio (1975). Unsteady effects in droplet evaporation and combustión. "Combustion Science and Technology", v. 11 ; pp. 9-18. ISSN 0010-2202.

Description

Title: Unsteady effects in droplet evaporation and combustión
Author/s:
  • Liñán Martínez, Amable
  • Crespo Martínez, Antonio
Item Type: Article
Título de Revista/Publicación: Combustion Science and Technology
Date: 1975
ISSN: 0010-2202
Volume: 11
Subjects:
Freetext Keywords: Combustion, Evaporation
Faculty: E.T.S.I. Aeronáuticos (UPM)
Department: Motopropulsión y Termofluidodinámica [hasta 2014]
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

An asymptotic analysis is presented for the problem of droplet vaporization in a stagnant atmosphere taking into account the unsteady effects in the gas phase. The ratio of the densities of the ambient gas and of the liquid is considered as a small parameter. The results of the classical quasi-steady theories are recovered in the first approximation, and corrections due to unsteady effects are obtained for the vaporization rate and for the droplet lifetime, which are found to be of the order of the square root of the density ratio. The analysis is extended to cover the cases when the vaporization rate is enhanced by a fast irreversible reaction between the fuel vapor and an oxidizer in the ambient gas. While the quasí-steady theories predict the vaporization rate with relative errors of the order of the square root of the density ratio, the ratio of flame radius to droplet radius is found in many practical cases to vary significantly with time in agreement with experimental results.

More information

Item ID: 1233
DC Identifier: http://oa.upm.es/1233/
OAI Identifier: oai:oa.upm.es:1233
Deposited by: Biblioteca ETSI Aeronauticos
Deposited on: 19 Nov 2008
Last Modified: 20 Apr 2016 06:44
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