Observatorio de I+D+i UPM

Memorias de investigación
Research Publications in journals:
Critical radius for hot-jet ignition of hydrogen-air mixtures
Year:2013
Research Areas
  • Mechanical aeronautics and naval engineering
Information
Abstract
This study addresses deflagration initiation of lean and stoichiometric hydrogen?air mixtures by the sudden discharge of a hot jet of their adiabatic combustion products. The objective is to compute the minimum jet radius required for ignition, a relevant quantity of interest for safety and technological applications. For sufficiently small discharge velocities, the numerical solution of the problem requires integration of the axisymmetric Navier?Stokes equations for chemically reacting ideal-gas mixtures, supplemented by standard descriptions of the molecular transport terms and a suitably reduced chemical-kinetic mechanism for the chemistry description. The computations provide the variation of the critical radius for hot-jet ignition with both the jet velocity and the equivalence ratio of the mixture, giving values that vary between a few tens microns to a few hundred microns in the range of conditions explored. For a given equivalence ratio, the critical radius is found to increase with increasing injection velocities, although the increase is only moderately large. On the other hand, for a given injection velocity, the smallest critical radius is found at stoichiometric conditions.
International
Si
JCR
Si
Title
International Journal of Hydrogen Energy
ISBN
0360-3199
Impact factor JCR
3,548
Impact info
Datos JCR del año 2012
Volume
38
10.1016/j.ijhydene.2012.12.082
Journal number
7
From page
3105
To page
3109
Month
SIN MES
Ranking
12/81 Energy and Fuels
Participants
  • Autor: Jaime Carpio Huertas (UPM)
  • Autor: Immaculada Iglesias (UC3M)
  • Autor: Marcos Vera (UC3M)
  • Autor: Antonio L. Sánchez (UC3M)
  • Autor: Amable Liñan Martinez (UPM)
Research Group, Departaments and Institutes related
  • Creador: Departamento: Ingeniería Energética y Fluidomecánica
S2i 2020 Observatorio de investigación @ UPM con la colaboración del Consejo Social UPM
Cofinanciación del MINECO en el marco del Programa INNCIDE 2011 (OTR-2011-0236)
Cofinanciación del MINECO en el marco del Programa INNPACTO (IPT-020000-2010-22)