Experimental Research on Premixed Porous Media Combustion in Multiple Ejection/Tangential Burner

2014 ◽  
Vol 709 ◽  
pp. 83-86
Author(s):  
Jiang Rong Xu ◽  
Xiang Xiang Chen ◽  
Guan Qing Wang
Keyword(s):  
Porous Medium ◽  
Porous Media ◽  
Temperature Distribution ◽  
Experimental Research ◽  
Premixed Combustion ◽  
Experimental Results ◽  
Ignition Characteristic ◽  
Porous Media Combustion

In this paper, the experimental research of porous media combustion was carried on premixed combustion of multiple ejection/tangential burner, the ignition characteristic, the resistance characteristics and the temperature distribution in the burner were obtained, and the experimental results were analyzed in detailed, which can provide references for the improvements of novel porous medium burner.

scholarly journals Numerical simulation of porous media combustion for high temperature heat exchanger

2018 ◽  
Vol 192 ◽  
pp. 02016
Author(s):  
Panu Iamsakulpanich ◽  
Kittipass Wasinarom ◽  
Thanathon Sesuk ◽  
Jarruwat Charoensuk ◽  
Katsunori Hanamura ◽  
...  
Keyword(s):  
Porous Media ◽  
Temperature Distribution ◽  
Uniform Temperature ◽  
Reaction Equation ◽  
Temperature Heat ◽  
1D Model ◽  
Burner Design ◽  
Porous Media Combustion ◽  
Porous Media Burner

The purpose of this work is developing the numerical 1D model of porous media combustion for investigating porous media burner systems. The software is used to solve energy, mass transfer and chemical reaction equation of the combustion. The operating condition and property parameters, which mainly affect the functions and quality of the industrial burner design, such as the inlet velocity of the reactants, the equivalence ratio, the extinction coefficient and the thermal conductivity of porous media, will be investigated and validated with experimental data. For developing the procedure of experiment, three diameter sizes of porous media materials (5 mm, 10 mm, and 15 mm.) were used. As a result, the developed model will be used as a tool to explore temperature distribution of heat exchange to improve thermal performance and overall efficiency system. Moreover, this knowledge can be applied to design porous media burner systems for uniform temperature distribution operation.

Non-Premixed CH4 Combustion in a Porous Medium

2009 ◽  
Author(s):  
A. Tarokh ◽  
A. A. Mohamad ◽  
L. Jiang
Keyword(s):  
Porous Medium ◽  
Porous Media ◽  
Combustion Zone ◽  
Combustion Process ◽  
Fiber Material ◽  
Combustion Efficiency ◽  
Premixed Combustion ◽  
Maximum Temperature ◽  
Wall Functions ◽  
Ch4 Combustion

Combustion process is the major contributor to the air pollution, such as CO, unburned hydrocarbon, soot and NOx, etc. Porous media can be a good candidate for improving the combustion efficiency and reducing pollution formation. Premixed combustion has been extensively investigated in the literature, experimentally and computationally. However, investigation of non-premixed combustion in porous media is limited in the open literature, which is the topic of this paper. The present work deals with the numerical modeling of methane/air non-premixed combustion in porous media. Physical problem that is considered here is fuel jet which is injected to the air in free flame case and injected into a porous medium, in the porous medium combustion case. The flow is assumed turbulent and standard k-ε model with standard wall functions is used in the simulation. The solid porous structure is assumed to be composed of alumina fiber material with temperature dependent heat conductivity. Discrete Ordinate method is used to solve radiative transport equations. The governing equations are solved using finite volume method. The results show that the combustion in porous media has superior combustion efficiency and significantly lower NOx and CO emissions compare to the free flame. This is due to the lower maximum temperature in porous media combustion. In comparison with the free flame case where the combustion zone is narrow and long, the results shows the combustion zone in porous media is shorter in axial and wider in radial direction.

Travelling fronts in porous media combustion: existence and a singular limit

2006 ◽  
Vol 462 (2071) ◽  
pp. 1965-1985 ◽  
Author(s):  
Peter Gordon ◽  
Lenya Ryzhik
Keyword(s):  
Porous Medium ◽  
Porous Media ◽  
Detonation Wave ◽  
Travelling Wave ◽  
Singular Limit ◽  
Travelling Wave Solutions ◽  
Zero Temperature ◽  
Wave Solutions ◽  
Travelling Fronts ◽  
Porous Media Combustion

We consider a model for the propagation of a subsonic detonation wave through a porous medium introduced by Sivashinsky (Sivashinsky 2002 Proc. Combust. Inst . 29 , 1737–1761). We show that it admits travelling wave solutions that converge in the limit of zero temperature diffusivity to the travelling fronts of a reduced system constructed in Gordon et al . (Gordon et al . 2002 Asymptotic Anal . 29 , 309–321).

Research on Influencing Factors of Methane/Air Combustion in the Ring Porous Medium Burner

2011 ◽  
Vol 130-134 ◽  
pp. 1734-1738 ◽  
Author(s):  
Jiang Rong Xu ◽  
Jian Ming Zhao ◽  
Shan Shan Xu ◽  
Guan Qing Wang
Keyword(s):  
Porous Medium ◽  
Porous Media ◽  
High Temperature ◽  
Temperature Distribution ◽  
Influencing Factors ◽  
Hot Spots ◽  
Theoretical Basis ◽  
Asymmetric Structure ◽  
Mixed Gas ◽  
Simulation Results

In this paper, we focuses on combustion characteristics of the mixed gas of methane/air in the ring porous medium burner using numerical simulating method. The influencing factors of combustion, such as different methane/air ratio, the velocity of flow and heat loss of internal and external wall, are discussed, and it is shown that the ring porous medium burners have some advantages different from straight or rectangular porous media burners. Due to annular asymmetric structure, the temperature distribution of ring porous media burners are more uniform, and are no unfavorable phenomena such as the local high temperature and the hot spots. The simulation results for annular porous medium provides important theoretical basis for the development of new porous medium burners.

Heat Transfer Modeling of a High-Temperature Porous-Medium Filled Solar Thermochemical Reactor for Hydrogen and Synthesis Gas Production

2018 ◽  
Vol 141 (2) ◽  
Author(s):  
Ruming Pan ◽  
Bachirou Guene Lougou ◽  
Yong Shuai ◽  
Guohua Zhang ◽  
Hao Zhang
Keyword(s):  
Heat Transfer ◽  
Porous Medium ◽  
Porous Media ◽  
High Temperature ◽  
Temperature Distribution ◽  
Synthesis Gas ◽  
Gas Production ◽  
Operating Conditions ◽  
Heat Transfer Modeling ◽  
Solar Thermochemical

In this paper, heat transfer modeling of a high-temperature porous-medium filled solar thermochemical reactor for hydrogen and synthesis gas production is investigated. The numerical simulation is performed using a three-dimensional (3D) numerical model and surface-to-surface radiation model coupled to Rosseland approximation for radiation heat transfer. The effects of operating conditions and the porous structural parameters on the reactor thermal performance were investigated significantly. It was found that large axial temperature gradient and high-temperature distribution throughout the reactor were strongly dependent on the operating conditions. The inlet gas temperature has remarkable effects on the temperature distribution. The thermal performance of porous-medium filled solar thermochemical reactor could be improved by preheating the inlet gas up to 393.15 K. Moreover, a correlation was established between the protective gas inlet velocity and the porosity of porous media. The temperature difference decreased with the increase in the porosity of the inner cavity of the reactor. In contrast to the front and back parts of the inner cavity of the reactor, higher temperature distribution could be obtained in the porous region by increasing the average cell diameters of porous media.

Experimental Research on Combustion and Emission Performance for Micro Combustor of MTPV System with Stratified Porous Media

2012 ◽  
Vol 608-609 ◽  
pp. 934-940
Author(s):  
Jian Wu ◽  
Bo Li ◽  
Bin Xu ◽  
Jia Xuan Miao
Keyword(s):  
Porous Media ◽  
Temperature Distribution ◽  
Band Gap ◽  
Experimental Research ◽  
Wall Temperature ◽  
Combustion Efficiency ◽  
Critical Component ◽  
Uniform Temperature ◽  
The Past ◽  
Micro Combustor

As the critical component of the system, micro-combustor requires a high and uniform temperature distribution along the wall to meet demands for the band gap of the PV cells. The past experiments have proved that the peak wall temperature of the combustor with porous media increases obviously. This paper will have a research on stratified porous media to enhance the combustion efficiency of the combustor and reduce the emissions.

Conservative solute transport with periodic velocity and sinusoidal source concentration in semi-infinite porous media: An analytical solution

2014 ◽  
Vol 6 (1) ◽  
pp. 1024-1031
Author(s):  
R R Yadav ◽  
Gulrana Gulrana ◽  
Dilip Kumar Jaiswal
Keyword(s):  
Porous Medium ◽  
Porous Media ◽  
Laplace Transformation ◽  
Seepage Velocity ◽  
Transformation Technique ◽  
Numerical Examples ◽  
One Dimensional ◽  
Porous Domain ◽  
Conservative Solute Transport ◽  
Source Concentration

The present paper has been focused mainly towards understanding of the various parameters affecting the transport of conservative solutes in horizontally semi-infinite porous media. A model is presented for simulating one-dimensional transport of solute considering the porous medium to be homogeneous, isotropic and adsorbing nature under the influence of periodic seepage velocity. Initially the porous domain is not solute free. The solute is initially introduced from a sinusoidal point source. The transport equation is solved analytically by using Laplace Transformation Technique. Alternate as an illustration; solutions for the present problem are illustrated by numerical examples and graphs.

Sign in / Sign up

Export Citation Format

Share Document