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

Abstract

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.

Analysis of nonpremixed multiregion laminar flames through biofuel porous particles considering the effect of heat recirculation

“…Also, maximum absolute value of thermophoretic force was found to be . Bidabadi et al 22 investigated a mathematical modeling of nonpremixed laminar flow flames fed with biofuel in counterflow geometry considering the porosity and thermophoresis effects using an asymptotic approach. Hurevich et al 23 theoretically analyzed the behavior of porous particles in a plasma flame.…”

Experimental study on premixed flame combustion of annular burner with CO 2 dilution based on OH-PLIF technology

“…The flame reaction zone is the key to the combustion mechanism research and industrial application of micro gas turbine (Liu, 2016). The study on the structure of the flame reaction zone can provide guidance for the optimization design of the combustion chamber (Bidabadi, Ghashghaei Nejad, Rasam, Sadeghi, & Shabani, 2018;Bo, Costa, Li, Aldén, & Bai, 2017;Santis, Ingham, Ma, & Pourkashanian, 2016;Zornek, Mosbach, & Aigner, 2018).…”

Biofuel and Bioenergy Technology

“…This Special Issue of Energies on the subject of "Biofuel and Bioenergy Technology" contains the successful invited submissions . A total of twenty-seven technical papers which cover diversified biofuel and bioenergy technology related researches have shown critical results and contributed significant findings in biomass processing [1,2], bio-oil and biodiesel [3][4][5][6][7][8][9][10][11], syngas [12][13][14], biogas/methane [15][16][17][18][19], bioethanol and alcohol-based fuels [20][21][22], solid fuel [23][24][25] and also microbial fuel cell [13,26,27] developments.…”

“…As observed, both methods consume relatively lower energy requirement and are simpler in term of synthesis process. In a modelling study, Lycopodium particles were also simulated and modelled as biofuel and burned in air environment [25]. It was discovered that the particles of Lycopodium were greatly influenced by thermophoretic force.…”