Measurements of Thermal Conductivity and Optical Properties of Porous Partially Stabilized Zirconia

Hsu, Pei‐feng; Howell, John R.

doi:10.1080/08916159208946446

Cited by 127 publications

(34 citation statements)

References 21 publications

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“…For the ceramic foam, the effective thermal conductivity of radiation is k rad-f ¼ 16sT 3 [52,53]. For the alumina pellets, the effective thermal conductivity of radiation is It is found that the effective thermal conductivity of radiation is relative to the solid temperature.…”

Section: Effect Of Equivalence Ratio On the Temperature Profilementioning

confidence: 97%

Combustion characteristics of low-concentration coal mine methane in ceramic foam burner with embedded alumina pellets

Dai

Lin

et al. 2015

Applied Thermal Engineering

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Section: Effect Of Equivalence Ratio On the Temperature Profilementioning

confidence: 97%

Combustion characteristics of low-concentration coal mine methane in ceramic foam burner with embedded alumina pellets

Dai

Lin

et al. 2015

Applied Thermal Engineering

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“…The correlation for the radiative extinction coefficient, b = r s ? j s , for the SiC foam is obtained by Hsu and Howell [8]…”

Section: Radiation Modelingmentioning

confidence: 99%

Numerical investigation of premixed combustion in a porous burner with integrated heat exchanger

et al. 2012

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In this paper, we perform a numerical analysis of a two-dimensional axisymmetric problem arising in premixed combustion in a porous burner with integrated heat exchanger. The physical domain consists of two zones, porous and heat exchanger zones. Two dimensional Navier-Stokes equations, gas and solid energy equations, and chemical species transport equations are solved and heat release is described by a multistep kinetics mechanism. The solid matrix is modeled as a gray medium, and the finite volume method is used to solve the radiative transfer equation to calculate the local radiation source/sink in the solid phase energy equation. Special attention is given to model heat transfer between the hot gas and the heat exchanger tube. Thus, the corresponding terms are added to the energy equations of the flow and the solid matrix. Gas and solid temperature profiles and species mole fractions on the burner centerline, predicted 2D temperature fields, species concentrations and streamlines are presented. Calculated results for temperature profiles are compared to experimental data. It is shown that there is good agreement between the numerical solutions and the experimental data and it is concluded that the developed numerical program is an excellent tool to investigate combustion in porous burner. List of symbols c pSpecific heat of the fluid (J kgof reactions N s Number of chemical species N T Number of particles per unit volume (m -3 ) Nu Nusselt number (-) p Pressure (N m -2 ) Pr Prandtl number (-) q Radiant heat flux (W m -2 ) R Universal gas constant (J kg -1 K -1 ) R i Rate of reaction i R contact Thermal contact resistance (m 2 K W -1 ) R t Total thermal resistance (m 2 K W -1 ) Re Reynolds number, /qVd p l -1 r Radial coordinate (m) r i Inside tube diameter (m) r o Outside tube diameter (m) s Radiative geometry path length (m) s Unit vector (-) T Temperature (K) u Axial velocity (m s -1 ) V Velocity vector (m/s) v Radial velocity (m s -1 ) W Molecular weight (kg kmole -1 )

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“…1 [1], in where y Ã is the perpendicular axis to the flow direction x Ã ; u Ã is the velocity of fluid, T is temperature, H is half of the channel gap and q 00 w is heat flux at the wall. After some assumptions and simplifications on the steady state energy equation of the medium, the governing equations of the described problem is given as [11][12][13]:…”

Section: Introduction and The Problem Formulationmentioning

confidence: 99%

Convection–radiation heat transfer in solar heat exchangers filled with a porous medium: Exact and shooting homotopy analysis solution

Soltani

Shivanian

Ezzati

2016

Applied Thermal Engineering

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Measurements of Thermal Conductivity and Optical Properties of Porous Partially Stabilized Zirconia

Cited by 127 publications

References 21 publications

Combustion characteristics of low-concentration coal mine methane in ceramic foam burner with embedded alumina pellets

Combustion characteristics of low-concentration coal mine methane in ceramic foam burner with embedded alumina pellets

Numerical investigation of premixed combustion in a porous burner with integrated heat exchanger

Convection–radiation heat transfer in solar heat exchangers filled with a porous medium: Exact and shooting homotopy analysis solution

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