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Articoli di riviste sul tema "Porous Media Combustion"

Autore: Grafiati

Pubblicato: 16 novembre 2024

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1

Kamal, M. M., e A. A. Mohamad. "Combustion in Porous Media". Proceedings of the Institution of Mechanical Engineers, Part A: Journal of Power and Energy 220, n. 5 (11 luglio 2006): 487–508. http://dx.doi.org/10.1243/09576509jpe169.

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2

Wang, Fei, Xueming Li, Shuai Feng e Yunfei Yan. "Numerical Study on the Characteristics of Methane Hedging Combustion in a Heat Cycle Porous Media Burner". Processes 9, n. 10 (28 settembre 2021): 1733. http://dx.doi.org/10.3390/pr9101733.

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Abstract (sommario):

With the rapid development of portable devices and micro-small sensors, the demand for small-scale power supplies and high-energy-density energy supply systems is increasing. Comparing with the current popular lithium batteries, micro-scale burners based on micro-thermal photoelectric systems have features of high power density and high energy density, the micro-scale burner is the most critical part of the micro-thermal photovoltaic system. In this paper, the combustor was designed as a heat cycle structure and filled with porous media to improve the combustion characteristics of the micro combustor. In addition, the influence of the porous media distribution on the burner center temperature and wall temperature distribution were studied through numerical simulation. Furthermore, the temperature distribution of the combustor was studied by changing the porous media parameters and the wall parameters. The research results show that the heat cycle structure can reduce heat loss and improve combustion efficiency. When the combustion chamber is filled with porous media, it makes the radial center temperature rise by about 50 K and the temperature distribution more uniform. When filling the heat cycle channel with porous media the wall temperature can be increased. Finally, the study also found that as methane is combusted in the combustor, the temperature of the outer wall gradually increases as the intake air velocity increases. The results of this study provide a theoretical and practical basis for the further design of high-efficiency combustion micro-scale burners in the future.

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3

Cao, H. L., J. N. Zhao, K. Zhang, D. B. Wang e X. L. Wei. "Diffusion Combustion Characteristics of H₂/Air in the Micro Porous Media Combustor". Advanced Materials Research 455-456 (gennaio 2012): 413–18. http://dx.doi.org/10.4028/www.scientific.net/amr.455-456.413.

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In order to improve thermal to-electric energy conversion efficiency of the micro gas turbine power generation system, a novel micro porous media combustor is designed and experimental investigation on the H2/air diffusion combustion is performed to obtain its combustion characteristics. High efficiency diffusion combustion of H2/air can be stabilized in the very wide operating range, especially at higher excess air ratio. Exhaust gas temperature is markedly improved and meanwhile heat loss ratio is evidently decreased. Moreover, in the certain operating ranges, the greater the combustion thermal power and excess air ratio, the smaller heat loss of the micro combustor will be. The micro porous media combustor should be a preferred micro combustor for developing the micro gas turbine power generation system.

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4

Wang, Fei, Xueming Li, Shuai Feng e Yunfei Yan. "Influence of Porous Media Aperture Arrangement on CH4/Air Combustion Characteristics in Micro Combustor". Processes 9, n. 10 (29 settembre 2021): 1747. http://dx.doi.org/10.3390/pr9101747.

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Micro-electro-mechanical systems (MEMS) occupy an important position in the national economy and military fields, and have attracted great attention from a large number of scholars. As an important part of the micro-electromechanical system, the micro-combustor has serious heat loss due to its small size, unstable combustion and low combustion efficiency. Aiming at enhancing the heat transfer of the micro-combustor, improving the combustion stability and high-efficiency combustion, this paper embedded porous media in the combustor, and the effects of different parameters on the combustion characteristics were numerically studied. The research results showed that the layout of porous media should be reasonable, and the small and large pore porous media embedded in the inner and outer layers, respectively, can bring better combustion performance. Meanwhile, A: 10–30 has a high and uniform temperature distribution, and its methane conversion rate reached 97.4%. However, the diameter ratio of the inner layer to the outer layer (d/D) of the porous medium should be maintained at 0.4–0.6, which brings a longer gas residence time, and further enables the pre-mixed gas to preheat and burn completely. At a d/D of 0.5, the combustor has the highest outer wall temperature and CH4 conversion efficiency. Besides, compared with the pore size increasing rate of Δn = 10 PPI and Δn = 10 PPI, the radial temperature distribution of the Δn = 10 PPI combustor is more uniform, meanwhile avoids the occurrence of local high temperature. Under the condition of Δn = 10 PPI, A: 20–30 layout maintains excellent thermal and combustion performance. In addition, the lean flammable limits of MC-U20, MC-10/30-0.8, and MC-20/30-0.5 were compared, at an inlet velocity of 0.5 m/s, the corresponding lean flammable limits are 0.5, 0.4, and 0.3, respectively, among them MC-20/30-0.5 has a wider flammable limit range, showing excellent combustion stability. This research has guiding significance for the combustion stability of the micro combustor.

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5

Newburn, E. Ryan, e Ajay K. Agrawal. "Liquid Fuel Combustion Using Heat Recirculation Through Annular Porous Media". Journal of Engineering for Gas Turbines and Power 129, n. 4 (21 gennaio 2007): 914–19. http://dx.doi.org/10.1115/1.2719259.

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A counter-flow annular heat recirculating burner was designed for lean prevaporized, premixed combustion. Prior to entering the combustor, the reactants are passed through a porous media-filled preheating annulus surrounding the combustor. Kerosene is dripped by gravity onto the porous media and vaporized by the heat conducted through the combustor wall. Experiments were conducted to evaluate heat transfer and combustion performance at various equivalence ratios, heat release rates, and inlet air temperatures. Results show low CO emissions over a range of equivalence ratios. NOx emissions were high at high heat release rates, indicating inadequate prevaporization and premixing of fuel with air. Heat recirculation and heat loss characteristics are presented at various operating conditions.

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6

da Mota, J., W. Dantas e D. Marchesin. "Combustion Fronts in Porous Media". SIAM Journal on Applied Mathematics 62, n. 6 (gennaio 2002): 2175–98. http://dx.doi.org/10.1137/s0036139999347816.

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7

Wu, Jian, Bo Li, Bin Xu e Jia Xuan Miao. "Experimental Research on Combustion and Emission Performance for Micro Combustor of MTPV System with Stratified Porous Media". Advanced Materials Research 608-609 (dicembre 2012): 934–40. http://dx.doi.org/10.4028/www.scientific.net/amr.608-609.934.

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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.

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8

Weclas, Miroslaw. "Potential of Porous-Media Combustion Technology as Applied to Internal Combustion Engines". Journal of Thermodynamics 2010 (21 febbraio 2010): 1–39. http://dx.doi.org/10.1155/2010/789262.

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The paper summarizes the knowledge concerning porous media combustion techniques as applied in engines. One of most important reasons of this review is to introduce this still not well known technology to researchers doing with internal combustion engine processes, thermal engines, reactor thermodynamics, combustion, and material science. The paper gives an overview of possible applications of a highly porous open cell structures to in-cylinder processes. This application means utilization of unique features of porous media for supporting engine processes, especially fuel distribution in space, vaporization, mixing with air, heat recuperation, ignition and combustion. There are three ways for applying porous medium technology to engines: support of individual processes, support of homogeneous combustion process (catalytic and non-catalytic) with temperature control, and utilization of the porous structure as a heat capacitor only. In the first type of application, the porous structure may be utilized for fuel vaporization and improved fuel distribution in space making the mixture more homogeneous in the combustion chamber. Extension of these processes to mixture formation and ignition inside a combustion reactor allows the realization of a homogeneous and a nearly zero emissions level combustion characterized by a homogeneous temperature field at reduced temperature level.

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9

Kaviany, Massoud. "MODELING OF COMBUSTION IN POROUS MEDIA". Annual Review of Heat Transfer 9, n. 9 (1998): 219–68. http://dx.doi.org/10.1615/annualrevheattransfer.v9.60.

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10

ALDUSHIN, A. P., e B. J. MATKOWSKY. "Driven Combustion Waves in Porous Media*". Combustion Science and Technology 156, n. 1 (luglio 2000): 221–50. http://dx.doi.org/10.1080/00102200008947304.

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11

Pan, J. F., D. Wu, Y. X. Liu, H. F. Zhang, A. K. Tang e H. Xue. "Hydrogen/Oxygen Premixed Combustion Characteristics in Micro Porous Media Combustor". Energy Procedia 61 (2014): 1279–85. http://dx.doi.org/10.1016/j.egypro.2014.11.1081.

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12

Pan, J. F., D. Wu, Y. X. Liu, H. F. Zhang, A. K. Tang e H. Xue. "Hydrogen/oxygen premixed combustion characteristics in micro porous media combustor". Applied Energy 160 (dicembre 2015): 802–7. http://dx.doi.org/10.1016/j.apenergy.2014.12.049.

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13

Tu, Linyu, Siyu Ding, Shefeng Li, Haitao Zhang e Wei Feng. "Investigation of the Combustion Properties of Ethylene in Porous Materials Using Numerical Simulations". Energies 17, n. 9 (30 aprile 2024): 2153. http://dx.doi.org/10.3390/en17092153.

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As industrial modernization advances rapidly, the need for energy becomes increasingly urgent. This paper aims to enhance the current burner design by optimizing the combustion calorific value, minimizing pollutant emissions, and validating the accuracy of the burner model using experimental data from previous studies. The enhanced porous medium burner model is used to investigate the burner’s combustion and pollutant emission characteristics at various flow rates, equivalence ratios, combustion orifice sizes, and porosity of porous media. In comparison with the previous model, the combustion traits during ethylene combustion and the emission properties of pollutants under various operational circumstances have been enhanced with the enhanced porous medium burner model. The maximum temperature of ethylene combustion in the enhanced model is 174 k higher than that before the improvement, and the CO emissions are reduced by 31.9%. It is believed that the findings will serve as a guide for the practical implementation of porous media combustion devices.

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14

Viskanta, Raymond. "MODELING OF COMBUSTION IN POROUS INERT MEDIA". Special Topics & Reviews in Porous Media - An International Journal 2, n. 3 (2011): 181–204. http://dx.doi.org/10.1615/specialtopicsrevporousmedia.v2.i3.30.

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15

HANAMURA, Katsunori, e Satoshi NISHIO. "Stirling Engine with Combustion in Porous Media". Proceedings of the JSME annual meeting 2002.4 (2002): 159–60. http://dx.doi.org/10.1299/jsmemecjo.2002.4.0_159.

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16

Yamamoto, K., e F. Ochi. "Soot accumulation and combustion in porous media". Journal of the Energy Institute 79, n. 4 (1 dicembre 2006): 195–99. http://dx.doi.org/10.1179/174602206x146281.

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17

Mujeebu, M. Abdul, M. Zulkifly Abdullah, A. A. Mohamad e M. Z. Abu Bakar. "Trends in modeling of porous media combustion". Progress in Energy and Combustion Science 36, n. 6 (dicembre 2010): 627–50. http://dx.doi.org/10.1016/j.pecs.2010.02.002.

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18

Diamantis, D. J., E. Mastorakos e D. A. Goussis. "Simulations of premixed combustion in porous media". Combustion Theory and Modelling 6, n. 3 (settembre 2002): 383–411. http://dx.doi.org/10.1088/1364-7830/6/3/301.

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19

Brailovsky, I., e G. Sivashinsky. "On propagation limits in porous media combustion". Combustion Theory and Modelling 6, n. 4 (dicembre 2002): 595–605. http://dx.doi.org/10.1088/1364-7830/6/4/303.

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20

Robayo, Manuel D., Ben Beaman, Billy Hughes, Brittany Delose, Nina Orlovskaya e Ruey-Hung Chen. "Perovskite catalysts enhanced combustion on porous media". Energy 76 (novembre 2014): 477–86. http://dx.doi.org/10.1016/j.energy.2014.08.045.

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21

Ahmed Janvekar, Ayub, M. Z. Abdullah, Zainal Arifin Ahmad, Aizat Abas, Ahmed A. Hussien, Musavir Bashir, Qummare Azam e Mohammed Ziad Desai. "Assessment of porous media combustion with foam porous media for surface/submerged flame". Materials Today: Proceedings 5, n. 10 (2018): 20865–73. http://dx.doi.org/10.1016/j.matpr.2018.06.473.

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22

Salinas, R., U. Raff e L. A. Henríquez-Vargas. "Digital Temperature Tracking in Porous Media Burners". Measurement and Control 45, n. 3 (aprile 2012): 90–93. http://dx.doi.org/10.1177/002029401204500305.

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Abstract (sommario):

Combustion in porous media burners presents considerable advantages over free flame burners due to several outstanding features inter alia clean and highly efficient combustion properties allowing a considerable amount of feedback energy from the flame area to preheat the mixture of fuel and air resulting in a considerable reduction of unavoidable pollutant formations appearing e.g. as the emission of CO and NOX. In addition, porous media burners are manufactured in highly compact small sizes suitable to industrial and household heating characteristic applications. Heat transfer between solid and gas depends mainly on the porous thermophysical properties of the component known as the solid matrix. These systems are characterized by the formation of a combustion flame pulse or wave which can travel inside the burner, depending on the operating conditions at velocities of about 0.1 mm/s. In this paper, a new temperature tracking scheme is proposed based on digital image processing to determine the position and the velocity of the thermal profile. Results showed reduced errors in the estimation of the peak temperature position using digital image analysis compared to conventional thermocouple-based measurements techniques.

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23

Jeong, Young-Sik, Sang-Man Lee, Nam-Ki Kim, Jae-Won Hwang e Jae-Ou Chae. "A study on combustion characteristics of superadiabatic combustor in porous media". KSME International Journal 12, n. 4 (luglio 1998): 680–87. http://dx.doi.org/10.1007/bf02945728.

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24

Li, J., S. K. Chou, Z. W. Li e W. M. Yang. "Experimental investigation of porous media combustion in a planar micro-combustor". Fuel 89, n. 3 (marzo 2010): 708–15. http://dx.doi.org/10.1016/j.fuel.2009.06.026.

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25

F., S. R. Khatami, B. Safavisohi e E. Sharbati. "Porosity and Permeability Effects on Centerline Temperature Distributions, Peak Flame Temperature, Flame Structure, and Preheating Mechanism for Combustion in Porous Media". Journal of Energy Resources Technology 129, n. 1 (26 marzo 2006): 54–65. http://dx.doi.org/10.1115/1.2424964.

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The applicability and usefulness of combustion in porous media is of much interest due to its competitive combustion efficiency and lower pollutants formation. In the previous works, the focus has been on the effects of combustion and heat transfer parameters such as excess air ratio, thermal power, solid conductivity, convective heat transfer coefficient, and radiation properties on centerline temperature and pollutant formations. A premixed combustion scheme and a fixed porous medium with constant geometrical parameters have been used in these works; therefore, the effects of porous material parameters have been less considered. In this research, the effects of geometrical parameters of porous medium, namely porosity and permeability, on centerline temperature distributions, peak flame temperature, flame structure, and gas mixture preheating have been investigated by numerical methods. To this, a two-dimensional axis-symmetric physical model of porous burner is considered. As the most typical porous burners, a two stage one which has preheating porous zone (PPZ) and combustion porous zone (CPZ) is studied. The continuity, momentum, energy, turbulence, and species transport equations are solved employing a one-step chemical reaction mechanism with an eddy-dissipation model for rate of reactions. The turbulence is modeled with two transport equations which are not considered in similar works. The combustion regime is assumed to be diffusion and combustion parameters are fixed in all cases. Porosity effects on the structure and temperature characteristic of the flame are probed in a wide range for PPZ and CPZ. Critical permeability is defined and permeability effects on flame characters in both of the preheating and combustion regions are studied thoroughly.

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26

Iamsakulpanich, Panu, Kittipass Wasinarom, Thanathon Sesuk, Jarruwat Charoensuk, Katsunori Hanamura, Preecha Karin e Visarn Lilavivat. "Numerical simulation of porous media combustion for high temperature heat exchanger". MATEC Web of Conferences 192 (2018): 02016. http://dx.doi.org/10.1051/matecconf/201819202016.

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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.

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27

Xu, Jiang Rong, Xiang Xiang Chen e Guan Qing Wang. "Experimental Research on Premixed Porous Media Combustion in Multiple Ejection/Tangential Burner". Applied Mechanics and Materials 709 (dicembre 2014): 83–86. http://dx.doi.org/10.4028/www.scientific.net/amm.709.83.

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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.

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28

Marbach, T. L., e A. K. Agrawal. "Experimental Study of Surface and Interior Combustion Using Composite Porous Inert Media". Journal of Engineering for Gas Turbines and Power 127, n. 2 (1 aprile 2005): 307–13. http://dx.doi.org/10.1115/1.1789516.

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Combustion using silicon carbide coated, carbon–carbon composite porous inert media (PIM) was investigated. Two combustion modes, surface and interior, depending upon the location of flame stabilization, were considered. Combustion performance was evaluated by measurements of pressure drop across the PIM, emissions of NOx and CO, and the lean blow-off limit. Data were obtained for the two combustion modes at identical conditions for a range of reactant flowrates, equivalence ratios, and pore sizes of the PIM. Results affirm PIM combustion as an effective method to extend the blow-off limit in lean premixed combustion.

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29

Xu, Jiang Rong, Jian Ming Zhao, Shan Shan Xu e Guan Qing Wang. "Research on Influencing Factors of Methane/Air Combustion in the Ring Porous Medium Burner". Applied Mechanics and Materials 130-134 (ottobre 2011): 1734–38. http://dx.doi.org/10.4028/www.scientific.net/amm.130-134.1734.

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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.

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30

Bubnovich, Valeri, Pedro San Martin, Luis Henriquez-Vargas, Nina Orlovskaya e Hernan A. Gonzaiez-Rojas. "ELECTRIC POWER GENERATION FROM COMBUSTION IN POROUS MEDIA". Journal of Porous Media 19, n. 10 (2016): 841–51. http://dx.doi.org/10.1615/jpormedia.v19.i10.10.

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31

HANAMURA, Katsunori, Masaya ADACHI e Ryozo ECHIGO. "Superadiabatic Combustion with Reciprocating Flow in Porous Media." Transactions of the Japan Society of Mechanical Engineers Series B 62, n. 596 (1996): 1629–37. http://dx.doi.org/10.1299/kikaib.62.1629.

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Chapiro, Grigori, e Aparecido Jesuino de Souza. "Asymptotic approximation for counterflow combustion in porous media". Applicable Analysis 95, n. 1 (7 gennaio 2015): 63–77. http://dx.doi.org/10.1080/00036811.2014.998204.

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Cinar, Murat, Louis M. Castanier e Anthony R. Kovscek. "Combustion Kinetics of Heavy Oils in Porous Media". Energy & Fuels 25, n. 10 (20 ottobre 2011): 4438–51. http://dx.doi.org/10.1021/ef200680t.

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YARIN, L. P., e G. S. SUKHOV. "A Heterogeneous Model of Combustion of Porous Media". Combustion Science and Technology 64, n. 1-3 (marzo 1989): 67–80. http://dx.doi.org/10.1080/00102208908924023.

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BUTAKOV, A. A., D. A. VAGANOV e S. N. LEONT'EV. "Study of Crack Appearances in Porous Media Combustion". Combustion Science and Technology 106, n. 1-3 (gennaio 1995): 137–52. http://dx.doi.org/10.1080/00102209508907771.

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Yamamoto, Kazuhiro, e Naoki Takada. "LB simulation on soot combustion in porous media". Physica A: Statistical Mechanics and its Applications 362, n. 1 (marzo 2006): 111–17. http://dx.doi.org/10.1016/j.physa.2005.09.033.

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Mujeebu, M. Abdul, M. Z. Abdullah, M. Z. Abu Bakar, A. A. Mohamad e M. K. Abdullah. "Applications of porous media combustion technology – A review". Applied Energy 86, n. 9 (settembre 2009): 1365–75. http://dx.doi.org/10.1016/j.apenergy.2009.01.017.

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Chou, S. K., W. M. Yang, J. Li e Z. W. Li. "Porous media combustion for micro thermophotovoltaic system applications". Applied Energy 87, n. 9 (settembre 2010): 2862–67. http://dx.doi.org/10.1016/j.apenergy.2009.06.039.

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Howell, J. R., M. J. Hall e J. L. Ellzey. "Combustion of hydrocarbon fuels within porous inert media". Progress in Energy and Combustion Science 22, n. 2 (gennaio 1996): 121–45. http://dx.doi.org/10.1016/0360-1285(96)00001-9.

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de Lemos, Marcelo J. S. "Analysis of turbulent combustion in inert porous media". International Communications in Heat and Mass Transfer 37, n. 4 (aprile 2010): 331–36. http://dx.doi.org/10.1016/j.icheatmasstransfer.2009.12.004.

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Coutinho, José E. A., e Marcelo J. S. de Lemos. "Laminar flow with combustion in inert porous media". International Communications in Heat and Mass Transfer 39, n. 7 (agosto 2012): 896–903. http://dx.doi.org/10.1016/j.icheatmasstransfer.2012.06.002.

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PEDERSENMJAANES, H., L. CHAN e E. MASTORAKOS. "Hydrogen production from rich combustion in porous media". International Journal of Hydrogen Energy 30, n. 6 (maggio 2005): 579–92. http://dx.doi.org/10.1016/j.ijhydene.2004.05.006.

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Dindi, H. "Combustion and dielectric breakdown instabilities in porous media". Earth-Science Reviews 29, n. 1-4 (ottobre 1990): 401–17. http://dx.doi.org/10.1016/0012-8252(90)90051-v.

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DINDI, H., J. BRITTEN e W. KRANTZ. "Combustion and dielectric breakdown instabilities in porous media". Earth-Science Reviews 29, n. 1-4 (ottobre 1990): 401–17. http://dx.doi.org/10.1016/0012-8252(0)90051-v.

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Zhang, Haitao, Shefeng Li, Yong Zhang, Siyu Ding, Pei Chen, Guangsen Song, Ziwei Zhao e Linyu Tu. "Numerical simulation of ethylene combustion characteristics under a new double-layer porous media burner". E3S Web of Conferences 385 (2023): 02016. http://dx.doi.org/10.1051/e3sconf/202338502016.

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Abstract (sommario):

The efficient use of energy is an important strategic issue concerning our energy security and double carbon goals. Many industrial waste gases, such as oil refineries, contain a lot of ethylene, which is a gas that is harmful to people and the environment. The use of high-efficiency burners to reduce ethylene emissions is a proven and convenient way, so the improvement and optimization of high-efficiency burners has become a hot research issue nowadays. In this paper, a new porous media burner is designed, and a numerical model of the structure is established based on finite element software. The porous media burner is used to treat low calorific value ethylene and effectively reduce the direct emission of low calorific value ethylene in wastewater treatment and chemical industries. Based on the model, the combustion characteristics and pollutant emission characteristics of premixed gas at different equivalence ratios and different flow rates were investigated. The results show that the maximum combustion temperature can reach 1757K with a constant inlet flow rate of premixed gas and a full combustion at an equivalent ratio of 0.85; the maximum temperature increases rapidly with the increase of flow rate at an inlet flow rate of 0.65-0.85 m/s with a constant equivalent ratio, and the temperature rise effect increases slowly when the flow rate is higher than 0.85 m/s; the new porous media The maximum reduction of pollutant emissions of the new porous media burner reaches 37.9%. This study has a guiding effect on the design and engineering application of porous media combustion devices.

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Ravi Kumar, N. "Exergy Analysis of Porous Medium Combustion Engine Cycle". ISRN Mechanical Engineering 2011 (16 ottobre 2011): 1–6. http://dx.doi.org/10.5402/2011/542840.

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The need of the fossil fuels is ever increasing in the areas of manufacturing, transportation, heating, and electricity. Nearly 90% of the energy requirement in transport sector is met by combustion of fossil fuels only. Porous media (PM) combustion is an effective method, which can increase the combustion efficiency as well as minimize environmental pollution. The present paper is aimed at thermodynamic analysis of ideal IC engine cycles with porous media combustion. Two practically possible cycles, namely, periodic and permanent contact of gas with porous medium are considered, and the ideal cycle analyses are made. It is found that PM engine with periodic contact is more efficient than permanent contact type. The exergy analysis also reveals that the energy loss due to irreversibilities in the periodic contact type is less than that of the permanent contact type. With the help of model calculations and graphs, the performance of these two cycles is compared and optimal operating conditions are also evaluated and presented along with the suggestions for enhancing the performance of homogeneous PM combustion in IC engines.

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Isabel Malico. "Potential of Porous Media Combustion Technology for Household Applications". International Journal of Advanced Thermofluid Research 1, n. 1 (30 agosto 2015): 45–62. http://dx.doi.org/10.51141/ijatr.v1i1.5.

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Households are major energy consumers and have a significant contribute to the World’s final energy consumption and CO2 emissions. Among the energy end-use in buildings lies cooking. The energy saving potential of cooking appliances is large and aninvestment on the development of more efficient and less polluting stoves and ovens is necessary. Porous medium combustion, already commercially available for several other applications, is a promising technology that can be applied also to household cooking. This paper reviews the research works done in the field. The number of papers dedicated to this specific application is relatively low, and most of them concentrate on experimentally proving the advantages of porous burners when compared toconventional solutions. The influence of burner characteristics and operating conditions are analysed in a few studies. However, there is still a considerable scope for the development of enhanced porous burners for household applications.

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Li, Qingqing, Jiansheng Wang, Jun Li e Junrui Shi. "Fundamental Numerical Analysis of a Porous Micro-Combustor Filled with Alumina Spheres: Pore-Scale vs. Volume-Averaged Models". Applied Sciences 11, n. 16 (16 agosto 2021): 7496. http://dx.doi.org/10.3390/app11167496.

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Inserting porous media into the micro-scale combustor space could enhance heat recirculation from the flame zone, and could thus extend the flammability limits and improve flame stability. In the context of porous micro-combustors, the pore size is comparable to the combustor characteristic length. It is insufficient to treat the porous medium as a continuum with the volume-averaged model (VAM). Therefore, a pore-scale model (PSM) is developed to consider the detailed structure of the porous media to better understand the coupling among the gas mixture, the porous media and the combustor wall. The results are systematically compared to investigate the difference in combustion characteristics and flame stability limits. A quantified study is undertaken to examine heat recirculation, including preheating and heat loss, in the porous micro-combustor using the VAM and PSM, which are beneficial for understanding the modeled differences in temperature distribution. The numerical results indicate that PSM predicts a scattered flame zone in the pore areas and gives a larger flame stability range, a lower flame temperature and peak solid matrix temperature, a higher peak wall temperature and a larger Rp-hl than a VAM counterpart. A parametric study is subsequently carried out to examine the effects of solid matrix thermal conductivity (ks) on the PSM and VAM, and then the results are analyzed briefly. It is found that for the specific configurations of porous micro-combustor considered in the present study, the PSM porous micro-combustor is more suitable for simplifying to a VAM with a larger Φ and a smaller ks, and the methods can be applied to other configurations of porous micro-combustors.

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Liang, Xiong, Yawei Li, Liping Pan, Shaobai Sang, Tianbin Zhu, Benwen Li e Christos G. Aneziris. "Preparation and enhancement of mullite reticulated porous ceramics for porous media combustion". Ceramics International 45, n. 17 (dicembre 2019): 22226–32. http://dx.doi.org/10.1016/j.ceramint.2019.07.246.

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50

Qian, Peng, Minghou Liu, Xinlong Li, Fubo Xie, Zizhen Huang, Chengyuan Luo e Xiugen Zhu. "Combustion characteristics and radiation performance of premixed hydrogen/air combustion in a mesoscale divergent porous media combustor". International Journal of Hydrogen Energy 45, n. 7 (febbraio 2020): 5002–13. http://dx.doi.org/10.1016/j.ijhydene.2019.12.094.

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