Effect of Thermal Resistance on the Random Combustion of Micro-Organic Dust Particles

Bidabadi, Mehdi; Harati, Mohammadali; Afzalabadi, Abolfazl; Rahbari, Alireza

doi:10.1061/(asce)ey.1943-7897.0000505

Cited by 4 publications

(2 citation statements)

References 20 publications

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“…The combustion behavior of non-premixed micro-jet flames through a methane-air mixture in a co-flow configuration was reported by Li et al [22]. Bidabadi et al [23] theoretically investigated the effect of thermal resistance on the structure of the premixed combustion of micro-organic dust particles with air. Spijker and Raupenstrauch [24] performed a numerical investigation to reveal the effect of the inner structure of lycopodium particles on the propagation of premixed flames.…”

Section: Introductionmentioning

confidence: 97%

Mathematical Modeling of Non-Premixed Laminar Flow Flames Fed with Biofuel in Counter-Flow Arrangement Considering Porosity and Thermophoresis Effects: An Asymptotic Approach

et al. 2018

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Due to the safe operation and stability of non-premixed combustion, it can widely be utilized in different engineering power and medical systems. The current paper suggests a mathematical asymptotic technique to describe non-premixed laminar flow flames formed in organic particles in a counter-flow configuration. In this investigation, fuel and oxidizer enter the combustor from opposite sides separately and multiple zones including preheating, vaporization, flame and post-flame zones were considered. Micro-sized lycopodium particles and air were respectively applied as a biofuel and an oxidizer. Dimensionalized and non-dimensionalized mass and energy conservation equations were determined for the zones and solved by Mathematica and Matlab software by applying proper boundary and jump conditions. Since lycopodium particles have numerous spores, the porosity of the particles was involved in the equations. Further, significant parameters such as lycopodium vaporization rate and thermophoretic force corresponding to the lycopodium particles in the solid phase were examined. The temperature distribution, flame sheet position, fuel and oxidizer mass fractions, equivalence ratio and flow strain rate were evaluated for the counter-flow non-premixed flames. Ultimately, the thermophoretic force caused by the temperature gradient at different positions was computed for several values of porosity, fuel and oxidizer Lewis numbers.

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Section: Introductionmentioning

confidence: 97%

Mathematical Modeling of Non-Premixed Laminar Flow Flames Fed with Biofuel in Counter-Flow Arrangement Considering Porosity and Thermophoresis Effects: An Asymptotic Approach

et al. 2018

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“…The total available fuel is calculated as the sum of volatilized fuel from each group as shown in Eqs. (40) and (41)[22]:…”

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Analytical Model of Recirculation Influence on Premixed Combustion of Lycopodium Dust Particle: Studying Thermal Resistance and Random Distribution of particles

2019

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In the present study, a comprehensive analytical method is developed to model the flame propagation through organic particles with air as a two-phase mixture, considering random distribution and particles thermal resistance. For this purpose, the structure of flame contains a preheat-vaporization zone, a reaction zone where vaporization and convection rates of particles are negligible and a post flame zone where diffusive terms are negligible in comparison of other terms zone. In order to enhance the combustion efficiency, the exhausted heat from the post flame zone is recirculated back to the preheat zone. Since this stream consists of high temperature gaseous mixture, it can enhance the temperature of the initial two-phase mixture entering the combustion chamber. A reasonable agreement between the results of the analytical approach and the experimental findings was obtained. Apart from the randomness distribution of particles and heat recirculation phenomena, the effect of thermal resistance on the combustion properties such as burning velocity and flame temperature is studied through non-zero Biot numbers in this model. Additionally, the variation of several parameters including equivalence ratio, particle diameter and Lewis number are studied in this research.

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Volatization & combustion of biomass particles in random media: Mathematical modeling and analyze the effect of Lewis number

Bidabadi

Harati

Xiong

et al. 2018

Chemical Engineering and Processing - Process Intensification

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Effect of Thermal Resistance on the Random Combustion of Micro-Organic Dust Particles

Cited by 4 publications

References 20 publications

Mathematical Modeling of Non-Premixed Laminar Flow Flames Fed with Biofuel in Counter-Flow Arrangement Considering Porosity and Thermophoresis Effects: An Asymptotic Approach

Mathematical Modeling of Non-Premixed Laminar Flow Flames Fed with Biofuel in Counter-Flow Arrangement Considering Porosity and Thermophoresis Effects: An Asymptotic Approach

Analytical Model of Recirculation Influence on Premixed Combustion of Lycopodium Dust Particle: Studying Thermal Resistance and Random Distribution of particles

Volatization & combustion of biomass particles in random media: Mathematical modeling and analyze the effect of Lewis number

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