This investigation evaluates the propagation of premixed flames in narrow channels with isothermal walls. The study is based on numerical solution set fully-compressible, reacting flow equations that includes viscosity, diffusion, thermal conduction and Arrhenius chemical kinetics. Specifically, pipes one extreme open closed are considered such a flame sparked at propagates towards one. channel...

Homogenous Charge Compression Ignition (HCCI) is a mode of combustion in IC engines in which premixed fuel and air are ignited spontaneously. There is a belief that HCCI engines have a great potential to improve fuel consumption and reduce NOx emissions. In this study, a single zone, zero dimensional, thermo-kinetic model has been developed and a computer program with MATLAB software is use...

Abstract A multi-relaxation-time discrete Boltzmann model (DBM) is proposed for compressible nonequilibrium reactive flows. The uniform equations are the governing of distribution functions that describe system. On right-hand side equations, reaction terms calculated by inverse matrix method used to couple chemical reactions and multi-physical fields naturally. Numerical tests show DBM suitable...

INTRODUCTION Partially premixed flames (PPFs) contain a rich premixed fuel–air mixture in a pocket or stream, and, for complete combustion to occur, they require the transport of oxidizer from an appropriately oxidizer–rich (or fuel–lean) mixture that is present in another pocket or stream. Partial oxidation reactions occur in fuel–rich portions of the mixture and any remaining unburned fuel an...

Tribrachial or triple flames represent a class of partially premixed flames that generally contain three spatially distinct but synergistically coupled reaction zones, namely a rich premixed, a lean premixed, and a nonpremixed reaction zone. The generally considered flow arrangement for burner-stabilized triple flames involves a rich mixture issuing from a central port and a lean mixture from t...

Background: An excessive medical expenditure is becoming a main barrier to good health for several people in China. Hence, there is a need to control this rising medical cost to reduce the financial burden placed on family and society in general. Objective: Our aim was to understand the expenses incurred during the use of two forms of infusion therapythe premixed preparations and the freezedryi...

Nowadays, the major challenge of diesel engines development is simultaneous nitrogen oxides and soot emissions reduction without the thermal efficiency drop. Hence, different combustion concepts should be investigated to reach optimum emission and performance conditions in diesel engines without expensive aftertreatment systems. This paper presents the results of a study on a dual fuel (DF) eng...

Due to increasing demand for clean and green energy, a need exists fuels with low emissions, such as synthetic gas (syngas), which exhibits excellent combustion properties has demonstrated promise in low-emission energy production, especially at microscales. However, due complicated flame microscale systems, it is of utmost importance describe syngas comprehend its respect boundary inlet condit...

The study of micro flame characteristics is an essential basis for developing combustors. Therefore, the non-premixed C3H8-air were experimentally studied. Flame length, shape, and blow-out limit studied by varying equivalence ratio, ?, inlet velocity C3H8-air, v, angles burner. results showed ignited had three combustion states: no flame, a stable flame. Whether could form mainly depended on ?...

This article reports nonlinear bifurcations observed in a laboratory scale, turbulent combustor operating under imperfectly premixed mode with global equivalence ratio as the control parameter. The results indicate that the dynamics of thermoacoustic instability correspond to quasi-periodic bifurcation to low-dimensional, deterministic chaos, a route that is common to a variety of dissipative n...