Development of 1D model for the analysis of heat transport in cylindrical micro combustors

Li, Jun; Chou, S.K.; Li, Zhiwang; Yang, Wenming

doi:10.1016/j.applthermaleng.2008.09.007

Cited by 29 publications

(11 citation statements)

References 28 publications

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“…Turkeli-Ramadan et al (2013) have also presented experimental data showing the widening of the flame stability limit by preheating the reactant temperature up to 600 K with a somewhat larger size combustor. Li et al (2009a) numerically investigated the effect of elevated temperatures up to 500 K on the stability of flames from hydrogen-air, methane-air and propane-air mixtures with a 1D model. It was found that when the reactant temperature increases, the heat loss ratio (defined as the ratio of heat loss from the flame to the heat generation in the reaction zone) drops substantially for these three different fuel-air mixtures.…”

Section: Introductionmentioning

confidence: 99%

Two-dimensional simulation of premixed laminar flame at microscale

Turkeli-Ramadan

Sharma

Raine

2015

Chemical Engineering Science

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Section: Introductionmentioning

confidence: 99%

Two-dimensional simulation of premixed laminar flame at microscale

Turkeli-Ramadan

Sharma

Raine

2015

Chemical Engineering Science

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“…2. Comparison between the analytical data with the published numerical data [3] shows an acceptable agreement with error up to 8 percent. Fig.…”

Section: Validationmentioning

confidence: 61%

“…Fig. 2 The comparison between the adiabatic flame temperature of H 2 /Air obtained from the analytical method (solid line), and numerical data (circle marker) published in [3] The adiabatic flame temperature is attained by calculation of combustion heat generation from enthalpy of reaction and the temperature dependent enthalpy models.…”

Section: Validationmentioning

confidence: 99%

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Analytical two-dimensional modeling of hydrogen–air mixture in catalytic micro-combustor

Fanaee

Esfahani

2015

Meccanica

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This paper investigates the combustion phenomenon in catalytic micro-combustor by using a twodimensional model. In solution of energy and mass equations, the temperature and mass dependant reaction rates are considered with an iterative procedure where the series matching conditions are exerted between neighbor zones. The reaction zone thickness is considered as a variable parameter and predicted by the solution results of the present study. The study of main parameters effects such as normalized wall temperature, Peclet number and equivalence ratio is also attained. The limitations of low and high Peclet number are determined where at high Peclet numbers the maximum temperature is decreased and the trend is inversed at low Peclet numbers. In order to validate this model the results are compared with published experimental data, showing an acceptable agreement and confirming the accuracy of the predicted data.

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“…Li et al [2] developed a onedimensional model to analyze the heat transport occurring in the cylindrical microcombustors. In their work, the one-step reaction mechanisms were employed for three fuel-air mixtures (H 2 -air, CH 4 -air, and C 3 H 8 -air) to account for the difference of fuel properties in terms of the kinetics.…”

mentioning

confidence: 99%

Analytical Modeling of Hydrogen–Air Mixture in a Catalytic Microchannel

Esfahani

Fanaee

2015

Journal of Thermophysics and Heat Transfer

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In the present study, the surface catalytic reaction in a microchannel with nonreactive hydrogen-air flow is investigated. Here, the microchannel wall is coated with a catalyst. A solution to the catalytic microchannel flow is gained by applying an iterative method to solve the energy, mole fraction, and catalytic reaction equations. To validate the model, the results of fuel conversion are compared with the results of experimental studies available in the literature, and a good agreement between them is achieved. Moreover, the results show that increasing the hydraulic diameter of the microchannel decreases normalized temperature of the mixture and catalyst heat transfer. Steeper variations are observed in the case of d h ∕L < 0.2. Furthermore, when the wall-to-inlet-temperature ratio is smaller than 2.5, the fuel conversion is very small; and for T W ∕T i > 3.5, the fuel is fully converted.rate constant of catalytic reaction, m · s −1 L = channel length, m M = molecular weight of species _ m = mass flow rate, kg · s −1 Nu = Nusselt number; hd h ∕k P = static pressure, atm Pe = Péclet number; υd h ∕α Pr = Prandtl number; υ∕α Pe m = mass Péclet number; υd h ∕D AB p = wetted perimeter of microchannel, m Q = catalyst heat transfer to flow, W Q = normalized catalyst heat transfer R = gas constant, J · kg −1 K −1 Re = Reynolds number; vd h ∕υ S = ratio of convection mass transfer to reaction rate Sc = Schmidt number; υ∕D AB Sh = Sherwood number; h m d h ∕D AB S = normalized sensitivity analysis parameter T = temperature, K v = flow velocity, m · s −1 W C = rate of fuel consumption, mole · m −2 s −1 X = axial location, m X = normalized axial location Y = bulk mole fraction of fuel Y = mole fraction of fuel θ = normalized temperature μ = dynamic viscosity, ns · m −1 υ = diffusion volumes of samples; Eq. (11) ρ = density, kg · m −3 Φ = model response parameter Subscripts c = conversion, catalytic reaction i = inlet, samples m = mass S = surface W = wall 0 = nominal value

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Development of 1D model for the analysis of heat transport in cylindrical micro combustors

Cited by 29 publications

References 28 publications

Two-dimensional simulation of premixed laminar flame at microscale

Two-dimensional simulation of premixed laminar flame at microscale

Analytical two-dimensional modeling of hydrogen–air mixture in catalytic micro-combustor

Analytical Modeling of Hydrogen–Air Mixture in a Catalytic Microchannel

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