Radiation blockage by the interaction of thermal radiation with conduction and convection in the combustion of condensed fuels

Chen, S.L.; Ma, Hwong‐Wen; Chen, D.Y.

doi:10.1016/0735-1933(93)90015-n

Cited by 11 publications

(4 citation statements)

References 3 publications

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“…Chen et al [5] evaluated the effect of attenuation of the heat flow through radiation caused by the barrier effect of soot particles, notably a dominant environment in thermal radiation absorption/emission processes. The authors stated that conduction and convection effects on the flame cannot be disregarded.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of the influence of OEC on soot formation and thermal radiation in confined acetylene diffusion flames

Santos¹,

Torres²,

Pereira³

2012

International Communications in Heat and Mass Transfer

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Section: Introductionmentioning

confidence: 99%

Evaluation of the influence of OEC on soot formation and thermal radiation in confined acetylene diffusion flames

Santos¹,

Torres²,

Pereira³

2012

International Communications in Heat and Mass Transfer

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“…The importance of a study of thermal radiation effect takes place in a numerious applications of condensed fuel combustion, solar energy collectors, heat exchangers, glass and ceramics manufacture, rocket propulsion chembers and laser processing of materials. A litereture survey reveals to the study of Chen et al [1], Reddy and Kumar [2], Nassab and Maramisaran [3], Obidina and Kiseleva [4], Saladino and Farmer [5] and Gedda et al [6]. In taking into account of the problem on radiation convection flows which leads to include the Schuster-Schwartzchild two flux model; the Milne-Eddington approximation and the Rosseland diffusion flux model (Siegel and Howell [7]).…”

Section: Introductionmentioning

confidence: 99%

Radiative Heat Transfer on Optically Thick Fluid Past an Oscillating Vertical Plate with Variable Temperature

Ghosh¹

2022

JENRR

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A theoretical study of radiation heat transfer with reference to an optically thick fluid past an oscillating vertical flat plate with variable temperature in the presence of convection and radiation has been presented. The fluid is considered to be a gray, absorbing-emitting radiation but non- scattering medium. The Rosseland flux approximation plays an important role in determining the effect of radiation heat transfer contribution. This problem is an improvement of Stoke’s first and second problem to justify the physical signifance on this problem. This problem is solved by employing Laplace transfrom method. Numerical results of velocity and temperature distributions are depicted graphically. Also, numerical results of frictional shearing stress and critical Grashof number are presented in tables.

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“…(3) Numerical and analytical studies, such as Baek et al [28] and Chen et al [29] solved one-dimensional equations of energy conservation and radiative heat fluxes with constant properties, under the assumption that soot particles dominate the absorbing-emitting process, the influence of temperature and optical thickness profiles on flame heat transfer blockages was evaluated; Bedir et al [30] completed a numerical study on PMMA diffusion flames with flame radiation in a stagnation-point geometry, a narrow-band radiation model was used to evaluate the absorption and emission from CO 2 , water vapor and MMA (fuel) vapor, and the net radiative heat flux was given as a function of the flame stretch rate, contributions from these three species to the emission at different stretch rates were investigated and compared. Overall the above numerical studies had made great contributions in revealing and explaining the physical nature and internal link of the phenomena, although they lacked of experimental support and might have space for further improvement in integrity and systematicness.…”

Section: Introductionmentioning

confidence: 99%

Heat transfer blockage in small scale combustion of polymers

Jiang

Ris

et al. 2011

Sci. China Technol. Sci.

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Flame heat transfer blockage occurs as fuel vapors, soot and products of combustion near a burning fuel surface block much of the heat feedbacks (including external radiative heat flux) to the fuel surface of a burning object. Blockage clearly affects burning rates and heat release rates of fires. This needs to be included when calculating flame heat transfer in fire growth models. An understanding of burning of materials in small scale fires is of broad and vital importance for predicting their burning performance in large scale fires. The blockage phenomenon was clearly observed and quantitatively measured in experiments that took advantage of the unique capability of the Fire Propagation Apparatus (FPA) of being able to vary the ambient oxygen concentrations. An indirect measurement approach was established which provides an experimental understanding of the concept of the blockage. The measurements were further explained by a one-dimensional steady-state model of a diffusion flame, which focuses on the radiant absorption and emission by the gas-soot mixture of flames. The theoretical model provides a greater understanding of the fundamental knowledge of the blockage. The overall heat transfer blockage factor can be up to 0.3 -0.4 for PMMA and POM. The factor and its components are nearly independent of the external radiation, but increase as the ambient oxygen concentration rises. A comparison between experimental data and model prediction shows a good agreement. polymer, flame heat transfer blockage, gas-soot mixture, gas absorption and emission, external radiant heat flux, oxygen concentration Citation: Jiang F H, Qi H Y, de Ris J L, et al. Heat transfer blockage in small scale combustion of polymers.

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Radiation blockage by the interaction of thermal radiation with conduction and convection in the combustion of condensed fuels

Cited by 11 publications

References 3 publications

Evaluation of the influence of OEC on soot formation and thermal radiation in confined acetylene diffusion flames

Evaluation of the influence of OEC on soot formation and thermal radiation in confined acetylene diffusion flames

Radiative Heat Transfer on Optically Thick Fluid Past an Oscillating Vertical Plate with Variable Temperature

Heat transfer blockage in small scale combustion of polymers

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