The Homogeneous Charge Compression Ignition (HCCI) combustion concept lacks direct ignition timing control, instead the auto ignition depends on the operating condition. Since auto ignition of a homogeneous mixture is very sensitive to operating conditions, a fast combustion timing control is necessary for reliable operation. Hence, feedback is needed and the crank angle of 50% burnt (CA50) has...

Laminar hydrocarbon flames, which have adiabatic flame speeds on the order of a meter per second, are conventionally described by a leading convective-diffusive zone followed by an energyreleasing reactive-diffusive region. On the other hand, combustion induced by a strong shock wave is typically modeled as a convective-reactive balance with negligible diffusion, which may be called a convectiv...

To understand working features of a micro combustor, a computer code has been developed to study combustion of hydrogen–air mixture in a series of chambers with same shape aspect ratio but various dimensions from millimeter to micrometer level. The prepared algorithm and the computer code are capable of modeling mixture effects in different fluid flows including chemical reactions, viscous and ...

The scalar mixing time scale, a key quantity in many turbulent combustion models, is investigated for reactive scalars in premixed combustion. Direct numerical simulations (DNS) of three-dimensional, turbulent Bunsen flames with reduced methane-air chemistry have been analyzed in the thin reaction zones regime. Previous conclusions from single step chemistry DNS studies are confirmed regarding ...

As a fundamental study to understand physical and chemical characteristics in micro-combustors, numerical simulations of a stagnation-point flow combustor with a catalytic surface are performed. One-dimensional similarity formulation is derived with full consideration of detailed surface and gasphase chemical kinetic models. Parametric studies are conducted to investigate the effects of strain ...

The generation by combustion processes of airborne species of current health concern such as polycyclic aromatic hydrocarbons (PAH) and soot particles necessitates a detailed understanding of chemical reaction pathways responsible for their formation. The present review discusses a general scheme of PAH formation and sequential growth of PAH by reactions with stable and radical species, includi...

Abstract In this paper, aiming at the chemical reaction system of solid-phase oscillating combustion, basic dynamic behavior laser in terms bifurcation diagram, Lyapunov exponent and complexity C0 is analyzed by using Matlab software, chaotic characteristics sensitivity to parameters combustion are expounded.

Abstract The oxidation number and of transferred electrons are two paramount parameters in the study redox reactions. Their calculations both important challenging. organic carbons is used chemistry, biochemistry, applied chemistry. Combustion reaction a classical type reaction, which oxygen molecule (O 2 ) oxidizing agent. In this article, integration three sets relations explored by using met...