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Journal of Porous Media
Fator do impacto: 1.752 FI de cinco anos: 1.487 SJR: 0.43 SNIP: 0.762 CiteScore™: 2.3

ISSN Imprimir: 1091-028X
ISSN On-line: 1934-0508

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Journal of Porous Media

DOI: 10.1615/JPorMedia.v13.i8.30
pages 707-723

NUMERICAL MODELING OF EVAPORATION ENHANCEMENT OF AVIATION-GRADE KEROSENE SPRAY IN POROUS MEDIA COMBUSTORS

Chendhil Periasamy
Combustion and Flame Dynamics Laboratory, School of Aerospace and Mechanical Engineering, 865 Asp Ave, Room 212, The University of Oklahoma, Norman, OK 73019; and Now at Air Liquide R&D, Newark, DE 19702, USA
Subramanyam R. Gollahalli
Combustion and Flame Dynamics Laboratory, School of Aerospace and Mechanical Engineering, 865 Asp Ave, Room 212, The University of Oklahoma, Norman, OK 73019, USA

RESUMO

This article presents a numerical study of evaporation enhancement of aviation-grade kerosene spray in porous media combustors. A two-energy equation model was employed to predict porous medium and gas phase temperatures. Governing equations were solved on a two-dimensional axisymmetric computational domain using FLUENT. An airblast atomizer model was used to simulate injection of kerosene spray on the porous medium. Heat feedback rate to the porous medium from the combustion zone was simulated by defining a uniform volumetric heat source in the porous medium. A range of heat feedback rates varying from 0.8% to 1.1% of average heat input to the combustor was specified. At 1% heat feedback rate, the porous medium attained a peak temperature of 465 K. Surface temperature measurements indicate that the transverse distribution was uniform within ±1.5% of the mean value. Transverse vapor concentration results downstream of the porous medium showed that the distribution in the transverse direction was uniform within §5% of the mean value. This demonstrates that porous medium uniformly distributes the fuel vapor-air mixture, a desirable feature in combustors. Effects of heat feedback rate, porosity of the medium, fuel-air equivalence ratio, and flame temperature on transverse vapor concentration profiles were also numerically studied.


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