A STEADY PSEUDO-COMPRESSIBILITY APPROACH BASED ON UNSTRUCTURED HYBRID FINITE VOLUME TECHNIQUES APPLIED TO TURBULENT PREMIXED FLAME PROPAGATION

A pseudo-compressibility method for zero Mach number turbulent reactive flows with heat release is combined with an unstructured finite volume hybrid grid scheme. The spatial discretization is based on an overlapped cell vertex approach. An infinite freely planar flame propagating into a turbulent medium of premixed reactants is considered as a test case. The recourse to a flamelet combustion modeling for which the reaction rate is quenched in a continuous way ensures the uniqueness of the turbulent flame propagation velocity. To integrate the final form of discretized governing equations, a three-stage hybrid time-stepping scheme is used and artificial dissipation terms are added to stabilize the convergence path towards the final steady solution. The results obtained with such a numerical procedure prove to be in good agreement with those reported in the literature on the very same flow geometry. Indeed, the flame structure as well as its propagation velocity are accurately predicted thus confirming the validity of the approach followed and demonstrating that such a numerical procedure will be a valuable tool to deal with complex reactive flow geometries.

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A STEADY PSEUDO-COMPRESSIBILITY APPROACH BASED ON UNSTRUCTURED HYBRID FINITE VOLUME TECHNIQUES APPLIED TO TURBULENT PREMIXED FLAME PROPAGATION

Revista de Engenharia Térmica ◽

10.5380/ret.v2i2.3475 ◽

2003 ◽

Vol 2 (2) ◽

Cited By ~ 1

Author(s):

W. M. C. Dourado ◽

P. Bruel ◽

J. L. F. Azevedo

Keyword(s):

Finite Volume ◽

Flame Propagation ◽

Propagation Velocity ◽

Turbulent Flame ◽

Flame Structure ◽

Numerical Procedure ◽

Turbulent Medium ◽

Flame Propagation Velocity ◽

Turbulent Premixed Flame ◽

Turbulent Reactive Flows

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Validation of an Ignition and Flame Propagation Model for Multiphase Flows

Volume 2: Combustion, Fuels and Emissions, Parts A and B ◽

10.1115/gt2011-45104 ◽

2011 ◽

Cited By ~ 3

Author(s):

J. M. Boyde ◽

P. Le Clercq ◽

M. Di Domenico ◽

M. Rachner ◽

G. C. Gebel ◽

...

Keyword(s):

Boundary Conditions ◽

Flame Propagation ◽

Multiphase Flows ◽

Numerical Models ◽

Turbulent Flame ◽

Propagation Model ◽

Test Case ◽

Turbulent Flame Speed ◽

Propagation Behavior ◽

Ignition Characteristics

This paper presents a numerical investigation of a generic lab scale combustor with focus on the ignition characteristics. The test case has been examined thoroughly in a comprehensive measurement campaign to provide a detailed set of boundary conditions and a profound data base of results. The experimental setup comprises five parallel-aligned mono-disperse droplet chains which are ignited, using a focused laser beam. One aspect of the experimental study is the ignitability with respect to the imposed boundary conditions. The second covers the growth and the propagation of the flame after the establishment of an initial kernel. The outcome of the numerical simulations is compared to the experimental results which allows an in-depth assessment of the employed numerical models. The chemistry and, thus, the flame propagation behavior is captured by a turbulent flame speed closure approach with an adaptation to render the model suitable to multiphase flows. For the dispersed phase a Lagrangian particle tracking scheme is employed in combination with a continuous thermodynamics fuel model for the evaporation. The overall good agreement demonstrates the capability of a multiphase flow CFD solver in the field of ignition modeling.

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A time-accurate pseudo-compressibility approach based on an unstructured hybrid finite volume technique applied to unsteady turbulent premixed flame propagation

International Journal for Numerical Methods in Fluids ◽

10.1002/fld.668 ◽

2004 ◽

Vol 44 (10) ◽

pp. 1063-1091 ◽

Cited By ~ 5

Author(s):

Wladimyr M. C. Dourado ◽

Pascal Bruel ◽

João L. F. Azevedo

Keyword(s):

Finite Volume ◽

Flame Propagation ◽

Premixed Flame ◽

Turbulent Premixed Flame ◽

Turbulent Premixed

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Reformed Fuel and Its Properties, Burning Speeds and Flame Characteristics

Energy Conversion and Resources ◽

10.1115/imece2005-80047 ◽

2005 ◽

Author(s):

Farzan Parsinejad ◽

Edwin Shirk ◽

Hameed Metghalchi

Keyword(s):

Flame Propagation ◽

Turbulent Flame ◽

Flame Structure ◽

Chemical Kinetic ◽

Cylindrical Vessel ◽

Flammability Limit ◽

Lean Burn ◽

Fuel Blend ◽

Fuel Blends ◽

Stable Flame

Premixed, lean burn combustion research has been focused for years on extending the lean flammability limit while maintaining both stable ignition and turbulent flame propagation. Burning speed is a fundamental physicochemical property of homogenous fuel/oxygen/diluent mixtures. It determines the rate of energy released during combustion and is of basic importance for developing and testing chemical kinetic models of hydrocarbons. The burning speed and flame structure of blends of reformed fuel and Methane-air mixtures have been studied using two similar constant volumes; a cylindrical vessel with end windows and a spherical chamber. The Experiments were conducted for a range of reformed fuel blends (20–80%) as well as mixture equivalence ratios (0.4–0.6). The burning speed results clearly define the regime of stable flame propagation for equivalence ratio/reformed fuel blend combinations.

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An experimental and numerical investigation of turbulent flame propagation and flame structure in a turbo-charged direct injection gasoline engine

Combustion Theory and Modelling ◽

10.1080/13647830802524829 ◽

2009 ◽

Vol 13 (1) ◽

pp. 167-188 ◽

Cited By ~ 21

Author(s):

D. Linse ◽

C. Hasse ◽

B. Durst

Keyword(s):

Numerical Investigation ◽

Flame Propagation ◽

Gasoline Engine ◽

Direct Injection ◽

Turbulent Flame ◽

Flame Structure ◽

Direct Injection Gasoline Engine

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A Preliminary Research on Turbulent Flame Propagation Combustion Modeling Using a Direct Chemical Kinetics Model

10.4271/2013-24-0023 ◽

2013 ◽

Cited By ~ 2

Author(s):

Shiyou Yang

Keyword(s):

Chemical Kinetics ◽

Flame Propagation ◽

Turbulent Flame ◽

Kinetics Model ◽

Combustion Modeling ◽

Preliminary Research

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POD Scale Analysis of Turbulent Premixed Flame Structure at Elevated Pressures

Combustion Science and Technology ◽

10.1080/00102202.2019.1679123 ◽

2019 ◽

pp. 1-23

Author(s):

Yaohui Nie ◽

Jinhua Wang ◽

Shilong Guo ◽

Weijie Zhang ◽

Wu Jin ◽

...

Keyword(s):

Flame Structure ◽

Premixed Flame ◽

Scale Analysis ◽

Turbulent Premixed Flame ◽

Elevated Pressures ◽

Turbulent Premixed

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Finite Element Volume Analysis of Propane Preheated Air Flame Passing Through a Minichannel

ASME 2014 12th International Conference on Nanochannels, Microchannels and Minichannels ◽

10.1115/icnmm2014-21832 ◽

2014 ◽

Cited By ~ 5

Author(s):

Masoud Darbandi ◽

Majid Ghafourizadeh ◽

Gerry E. Schneider

Keyword(s):

Finite Element ◽

Radiation Effects ◽

Mixture Fraction ◽

Flame Structure ◽

Current Method ◽

Reacting Flow ◽

Wall Functions ◽

Flamelet Model ◽

Combustion Modeling ◽

Detailed Kinetics

A hybrid finite-element-volume FEV method is extended to simulate turbulent non-premixed propane air preheated flame in a minichannel. We use a detailed kinetics scheme, i.e. GRI mechanism 3.0, and the flamelet model to perform the combustion modeling. The turbulence-chemistry interaction is taken into account in this flamelet modeling using presumed shape probability density functions PDFs. Considering an upwind-biased physics for the current reacting flow, we implement the physical influence upwinding scheme PIS to estimate the cell-face mixture fraction variance in this study. To close the turbulence closure, we employ the two-equation standard κ-ε turbulence model incorporated with suitable wall functions. Supposing an optically thin limit, it needs to take into account radiation effects of the most important radiating species in the current modeling. Despite facing with so many flame instabilities in such small size configuration, the current method performs suitably with proper convergence, and the encountered instabilities are damped out automatically. Comparing with the experimental measurements, the current extended method accurately predicts the flame structure in the minichannel configuration.

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