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Three-dimensional Linear Eddy Modeling of a Turbulent Lifted Hydrogen Jet Flame in a Vitiated Co-flow

Three-dimensional Linear Eddy Modeling of a Turbulent Lifted Hydrogen Jet Flame in a Vitiated Co-flow

Category
Academic article
Abstract
A new methodology for modeling and simulation of reactive flows is reported in which a 3D formulation of the Linear Eddy Model (LEM3D) is used as a post-processing tool for an initial RANS simulation. In this hybrid approach, LEM3D complements RANS with unsteadiness and small-scale resolution in a computationally efficient manner. To demonstrate the RANS-LEM3D model, the hybrid model is applied to a lifted turbulent N2-diluted hydrogen jet flame in a vitiated co-flow of hot products from lean H2/air combustion. In the present modeling approach, mean-flow information from RANS provides model input to LEM3D, which returns the scalar statistics needed for more accurate mixing and reaction calculations. Flame lift-off heights and flame structure are investigated in detail, along with other characteristics not available from RANS alone, such as the instantaneous and detailed species profiles and small-scale mixing.
Client
  • Research Council of Norway (RCN) / 233722
  • Notur/NorStore / NN9165K
Language
English
Author(s)
  • Fredrik Grøvdal
  • Sigurd Sannan
  • Jyh-Yuan Chen
  • Alan R Kerstein
  • Terese Løvås
Affiliation
  • Norwegian University of Science and Technology
  • SINTEF Energy Research / Termisk energi
  • University of California, Berkeley
  • USA
Year
Published in
Flow Turbulence and Combustion
ISSN
1386-6184
Volume
101
Issue
4
Page(s)
993 - 1007