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Macauba (<i>Acrocomia aculeata</i>) as a Bioenergy Platform: Integrated Biodiesel Production and Lignocellulosic Biomass Valorization. [PDF]
ACS OmegaNascimento DC +9 more
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Machine learning unveils three layers of food complexity. [PDF]
NPJ Sci FoodKe Q, Zhang J, Huang X, Kou X, Zhang D.
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Turbulent Flame Speeds of Premixed Supersonic Flame Kernels
Flow, Turbulence and Combustion, 2018It is unclear whether turbulent flame speed scalings established in low speed regimes are applicable to supersonic flames. To investigate this question, the canonical flame kernel is investigated in a scramjet-like channel having a one degree wall divergence. The growth, shape and internal kernel dynamics are investigated.
Bradley A. Ochs +3 more
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Experimental study of turbulent flame kernel propagation
Experimental Thermal and Fluid Science, 2008Flame kernels in spark ignited combustion systems dominate the flame propagation and combustion stability and performance. They are likely controlled by the spark energy, flow field and mixing field. The aim of the present work is to experimentally investigate the structure and propagation of the flame kernel in turbulent premixed methane flow using ...
Mohy Mansour +2 more
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Flame Kernel Growth in a Rotating Gas
Combustion Science and Technology, 2007The communication deals with an ignition kernel development in uniformly rotating mixture. A simple model is presented in order to predict the time evolution of the kernel length and its diameter under the assumption of ignition on the axis of rotation, which is preferred mode for rapid flame development.
Jerzy Chomiak +3 more
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Spark Discharge Induced Flame Kernel Growth
Fluids Engineering, 2000Abstract An intuitive study of the growth of a flame kernel immediately following a spark discharge is presented. It is shown that the radius of the flame kernel, R grows with time, t as R ∼ ( Δ E ρ o ) 1 / 5 t 1 / 5 where ΔE is the integrated energy (∫ Edt) deposited by the spark discharge and ρo is the initial ambient density.
Vedat Arpaci +2 more
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Theoretical analysis of the evolution from ignition kernel to flame ball and planar flame
Combustion Theory and Modelling, 2006Dynamics of flame kernel evolution with and without external energy addition has been investigated analytically and numerically. Emphasis is placed on the effects of radiation heat loss, ignition power and Lewis number on the correlation and transition between the initial flame kernel, the self-extinguishing flame, the flame ball, the outwardly ...
Zheng Chen, Yiguang Ju
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On the Initiation of a Spherical Flame Kernel
Combustion Science and Technology, 1984Abstract Using matched asymptotic expansions for large activation energies of the reaction rates, we have studied the structure and stability properties of steady spherical premixed flames which, in this geometry, need not be supported by any source (or sink) of fresh (or burned) gases.
B. Deshaies, G. Joulin
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Modeling Nanosecond-Pulsed Spark Discharge and Flame Kernel Evolution
Journal of Energy Resources Technology, 2020Abstract Dilute combustion, either using exhaust gas recirculation or with excess air, is considered a promising strategy to improve the thermal efficiency of internal combustion engines. However, the dilute air-fuel mixture, especially under intensified turbulence and high-pressure conditions, poses significant challenges for ...
Joohan Kim +4 more
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