Numerical simulation of multifront detonationon a hybrid computational cluster using detailed chemical mechanisms

Abstract In order to clarify the mechanism of modulation of turbulence structures such as quasi-streamwise vortices affected by a flame propagating toward a wall, we perform a direct numerical simulation of wall turbulence with premixed hydrogen-air combustion using a detailed chemical reaction mechanism. As a result, existing quasi-streamwise vortices in turbulence near the wall are found to be suppressed, disappearing as the flame approaches. Hence, the turbulent flow tends to become laminar. Moreover, according to the analysis of the vorticity transport equation, it is found that the suppression is due to thermal expansion of the flame rather than an increase in viscosity. From the viewpoint of chemical reactions, it is revealed that thermal expansion inside turbulence vortices is mainly caused by reactions involving H2 and H2O2.

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J056043 Simulation of Methane Partial Premixed Flame Using Combustion Technique Based on Chemical Equilibrium Method for Reducing Detailed Chemical Mechanisms

The Proceedings of Mechanical Engineering Congress Japan ◽

10.1299/jsmemecj.2011._j056043-1 ◽

2011 ◽

Vol 2011 (0) ◽

pp. _J056043-1-_J056043-5

Author(s):

Kazui Fukumoto ◽

Yoshifumi Ogami

Keyword(s):

Chemical Equilibrium ◽

Premixed Flame ◽

Chemical Mechanisms ◽

Equilibrium Method ◽

Combustion Technique ◽

Detailed Chemical

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Implementation of Detailed Chemical Mechanisms into Multidimensional CFD Using in situ Adaptive Tabulation: Application to HCCI Engines

10.4271/2002-01-2773 ◽

2002 ◽

Cited By ~ 22

Author(s):

M. Embouazza ◽

D. C. Haworth ◽

N. Darabiha

Keyword(s):

Chemical Mechanisms ◽

Hcci Engines ◽

In Situ Adaptive Tabulation ◽

Detailed Chemical

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Combustion Synthesis of Nanoscale Oxide Powders: Mechanism, Characterization and Properties

MRS Proceedings ◽

10.1557/proc-800-aa4.1 ◽

2003 ◽

Vol 800 ◽

Cited By ~ 23

Author(s):

Arvind Varma ◽

Alexander S. Mukasyan ◽

Kishori T. Deshpande ◽

Pavol Pranda ◽

Peter R. Erri

Keyword(s):

High Surface ◽

High Surface Area ◽

Thermal Conditions ◽

Optimum Conditions ◽

Combustion Mode ◽

Chemical Mechanisms ◽

Oxide Powders ◽

Extensive Experimental Data ◽

First Time ◽

Detailed Chemical

ABSTRACTBased on the analysis of extensive experimental data, we have formulated basic criteria necessary for the synthesis of a variety of oxides in the combustion mode, and defined optimum conditions for the production of high-surface area, well-crystalline nano-powders of desired phase composition and purity. Also, for the first time, detailed chemical mechanisms of interaction for various systems are identified, outlining specific roles of different fuels, oxidizers and thermal conditions

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Numerical strategies for detection of bifurcation points in the parametric continuation of model reactors with detailed chemical mechanisms

10.1063/1.5012382 ◽

2017 ◽

Cited By ~ 1

Author(s):

Luigi Acampora ◽

Francesco Saverio Marra

Keyword(s):

Chemical Mechanisms ◽

Bifurcation Points ◽

Parametric Continuation ◽

Detailed Chemical

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Simulation of H2-Air Turbulent Diffusion Flame by the Combustion Model Using Chemical Equilibrium Combined With the Eddy Dissipation Concept

Volume 3: Combustion, Fire and Reacting Flow; Heat Transfer in Multiphase Systems; Heat Transfer in Transport Phenomena in Manufacturing and Materials Processing; Heat and Mass Transfer in Biotechnology; Low Temperature Heat Transfer; Environmental Heat Transfer; Heat Transfer Education; Visualization of Heat Transfer ◽

10.1115/ht2009-88429 ◽

2009 ◽

Author(s):

Kazui Fukumoto ◽

Yoshifumi Ogami

Keyword(s):

Chemical Equilibrium ◽

Diffusion Flame ◽

Turbulent Diffusion ◽

Combustion Products ◽

Combustion Model ◽

Intermediate Species ◽

Turbulent Diffusion Flame ◽

Chemical Mechanisms ◽

Equilibrium Method ◽

Detailed Chemical

This research aims at developing a turbulent diffusion combustion model based on the chemical equilibrium method and chemical kinetics for simplifying complex chemical mechanisms. This paper presents a combustion model based on the chemical equilibrium method and the eddy dissipation concept (CE-EDC model); the CE-EDC model is validated by simulating a H2-air turbulent diffusion flame. In this model, the reaction rate of fuels and intermediate species is estimated by using the equations of the EDC model. Further, the reacted fuels and intermediate species are assumed to be in chemical equilibrium; the amount of the other species is determined from the amount of the reacted fuels, intermediate species, and air as reactants by using the Gibbs free energy minimization method. An advantage of the CE-EDC model is that the amount of the combustion products can be determined without using detailed chemical mechanisms. The results obtained by using this model were in good agreement with the experimental and computational data obtained by using the EDC model. Using this model, the amount of combustion products can be calculated without using detailed chemical mechanisms. Further, the accuracy of this model is same as that of the EDC model.

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