Quasiglobal reaction model for ethylene combustion

Singh, D. J.; Jachimowski, C. J.

doi:10.2514/3.11972

Cited by 88 publications

(22 citation statements)

References 2 publications

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“…The CHEMKIN database was used to find the thermochemical properties [13]. Nitrogen-diluted C 2 H 4 and air mixtures were considered with a reduced 10-step reversible C 2 H 4 /O 2 reaction mechanism involving 10 species due to Singh and Jachimowski [14]. Surface reactions on the catalytic plate were not considered for the present study, since any reliable reaction mechanism of C 2 H 4 /O 2 on the Ni surface is not available in the literature and the numerical simulations were conducted only to provide insight into understanding the flame structure in the DWSF burner.…”

Section: Experimental and Computational Methodsmentioning

confidence: 99%

Flame-synthesis limits and self-catalytic behavior of carbon nanotubes using a double-faced wall stagnation flow burner

Woo

Hong

Kwon

2009

Combustion and Flame

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Section: Experimental and Computational Methodsmentioning

confidence: 99%

Flame-synthesis limits and self-catalytic behavior of carbon nanotubes using a double-faced wall stagnation flow burner

Woo

Hong

Kwon

2009

Combustion and Flame

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“…A detailed description of the theoretical formulation is given in [21]. A nine-species, ten-step kinetics scheme proposed by Singh and Jachimowski [22] is employed to treat the chemical reactions of ethylene and air, as shown in Table 1. This model was numerically assessed in a one-dimensional, steady-state, constant-density flowfield over a wide range of pressures, temperatures, and equivalence ratios.…”

Section: Theoretical Formulation and Numerical Methodsmentioning

confidence: 99%

Supersonic Combustion and Flame Stabilization of Coflow Ethylene and Air with Splitter Plate

Zhang

Choi

Yang

2015

Journal of Propulsion and Power

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A numerical investigation of supersonic combustion for ethylene and air coflow with a splitter plate is presented, mimicking the flame stabilization and combustion establishment in a dual-combustion ramjet engine. Emphasis is placed on the detailed flow and flame characteristics immediately downstream of the splitter plate and in the shockwave/shear-layer interaction regions. Three different splitter-plate thicknesses, 2, 4, and 8 mm, are considered, to identify the significance of the geometric parameters. The analysis is based on the Favre-averaged conservation equations for compressible chemically reacting flows. Turbulence closure is achieved using Menter's shear-stress transport model with a detached-eddy-simulation extension. Chemical reactions are modeled using a nine-species, ten-step laminar chemistry model with sufficient numerical resolution. Various mechanisms dictating the flame anchoring and spreading properties are examined. The hot stream from the ethylene preoxidization in the gas generator is found to behave like an underexpanded supersonic jet. Its subsequent expansion in the present wallconfined environment has a strong influence on the near-field mixing and combustion. Depending on the splitter-plate thickness, the wake region behind the splitter plate changes in size, and the autoignited flame can be either attached to or detached from the rim. The majority of chemical reactions take place in the mixing layer farther downstream, and the combustion efficiency varies in accordance with the near-field phenomena. Nomenclature d = diameter of gas-generator exit nozzle, cm M = Mach number p = pressure, kPa R 1 = radius of gas-generator exit nozzle, cm R 2 = outer radius of isolator, cm T = temperature, K t = time, s u, v = velocity components, m∕s x, r, z = spatial coordinates, m Y = mass fraction Z = mixture fraction δ = thickness of splitter plate, mm ρ = density, kg∕m 3 ω = vorticity, s −1 Subscripts A = property of air f = property of fuel i = property of species i

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“…The governing equations were the one-dimensional and twodimensional axisymmetric Euler equations. In the present study, a detailed chemical reaction model 15 16 were used to describe the case of ethylene fuel. N 2 , He, and Ar were added in the original reaction models as inert gases.…”

Section: Computational Setupmentioning

confidence: 99%

Numerical Studies on Specific Impulse of Partially Filled Pulse Detonation Rocket Engines

Sato

Matsuo

Endo

et al. 2006

Journal of Propulsion and Power

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Performance analyses of pulse detonation rocket engines (PDREs) were numerically studied, focusing on partialfill effects at ground tests. The initial detonable mixture, inert gas, fuel-fill fraction, equivalence ratio, and initial temperature of inert gas were changed as governing parameters. The simulation results were compared against those of previous studies and agreed well with them. The simulation results indicated that the initial mass fraction of the detonable mixture to total mass of the gas was the predominant factor for the specific impulse of partially filled PDREs. Based on the numerical results, a new, simple empirical formula is proposed to predict the specific impulse of partially filled PDREs.

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Quasiglobal reaction model for ethylene combustion

Cited by 88 publications

References 2 publications

Flame-synthesis limits and self-catalytic behavior of carbon nanotubes using a double-faced wall stagnation flow burner

Flame-synthesis limits and self-catalytic behavior of carbon nanotubes using a double-faced wall stagnation flow burner

Supersonic Combustion and Flame Stabilization of Coflow Ethylene and Air with Splitter Plate

Numerical Studies on Specific Impulse of Partially Filled Pulse Detonation Rocket Engines

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