Доступ предоставлен для: Guest
Портал Begell Электронная Бибилиотека e-Книги Журналы Справочники и Сборники статей Коллекции
Atomization and Sprays
Импакт фактор: 1.262 5-летний Импакт фактор: 1.518 SJR: 0.814 SNIP: 1.18 CiteScore™: 1.6

ISSN Печать: 1044-5110
ISSN Онлайн: 1936-2684

Выпуски:
Том 29, 2019 Том 28, 2018 Том 27, 2017 Том 26, 2016 Том 25, 2015 Том 24, 2014 Том 23, 2013 Том 22, 2012 Том 21, 2011 Том 20, 2010 Том 19, 2009 Том 18, 2008 Том 17, 2007 Том 16, 2006 Том 15, 2005 Том 14, 2004 Том 13, 2003 Том 12, 2002 Том 11, 2001 Том 10, 2000 Том 9, 1999 Том 8, 1998 Том 7, 1997 Том 6, 1996 Том 5, 1995 Том 4, 1994 Том 3, 1993 Том 2, 1992 Том 1, 1991

Atomization and Sprays

DOI: 10.1615/AtomizSpr.2017016772
pages 367-382

A SIMPLE APPLICATION OF THE SPRAY-FLAMELET APPROACH TO THE SIMULATION OF BIPHASIC AND MULTI-COMPONENT FUEL WITH NON-UNITY LEWIS NUMBERS

Daniela Maionchi
Instituto de Fisica - Universidade Federal de Mato Grosso, 78060-900 Cuiabá-MT, Brazil,

Краткое описание

This work presents an extended analysis of the external structure of multi-phase and -component fuel counterflow diffusion flame. The model assumes the main fuel in gaseous and liquid phases with addition of secondary gaseous fuel. The spray-flamelet is described by means of the Schvab−Zel'dovich−Liñán formulation. The droplets are described by a uniform mono-sized distribution and vaporize completely before the flame, working as an extra source of gaseous fuel. No relative velocity between droplets and gaseous phase is considered. The model exhibits a general spray combustion parameter combining chemical reaction, flow field, and spray properties. The aim of the analysis is to identify how the external structure of the spray-flamelet is affected by addition of methane or hydrogen in a spray of ethanol or n-heptane. The results point out that by substituting the gaseous part of the main fuel by methane does not affect significantly the spray flame structure. The same occurs for small gaseous injection of hydrogen. The negligible differences are due to non-unity Lewis number. For these cases, a quasi-universal behavior of the spray-flamelet is identified. For larger amounts of hydrogen, higher flame temperatures are obtained compared to the earlier cases. For a given dimensionless incoming condition and changing the liquid main fuel, the combustion characteristics and the flame structure are very similar. Consequently, independent of the spray fuel considered by injecting the same secondary fuel, the dimensionless temperature, species mass fraction, mixture fraction and excess of enthalpy, show a quasi-universal behavior for the external structure of the spray-flamelet.


Articles with similar content:

Spherically expanding turbulent flames in fuel-droplet mists: A Direct Numerical Simulation analysis
ICHMT DIGITAL LIBRARY ONLINE, Vol.0, 2018, issue
G. Ozel Erol, J. Hasslberger, M. Klein, N. Chakraborty
DYNAMICS OF ANEDGE FLAME WITH A FUEL SPRAY
Atomization and Sprays, Vol.19, 2009, issue 10
J. Barry Greenberg, Y. Mindelis, E. Drukmann, Moshe Matalon
INFLUENCE OF EMULSIONS AND STEAM INJECTION ON A DIESEL FUELED MODEL GAS TURBINE COMBUSTOR
Atomization and Sprays, Vol.25, 2015, issue 12
Meagan Sung , Vincent McDonell
EFFECT OF A FUEL SPRAY ON EDGE FLAME PROPAGATION
Atomization and Sprays, Vol.22, 2012, issue 4
Leonid S. Kagan, J. Barry Greenberg, G. I. Sivashinsky
IMPROVEMENT OF FLAMEHOLDING CHARACTERISTICS BY INCIDENT SHOCK WAVES IN SUPERSONIC FLOW
International Journal of Energetic Materials and Chemical Propulsion, Vol.5, 2002, issue 1-6
S. Hasegawa, H. Kobayashi, T. Niioka, J. Sato, T. Fujimori, M. Murayama