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Heat transfer characteristics of methane-air diffusion flames impinging normally on plane surfaces

Document Type: Research Paper

Authors

1 School of Mechanical Engineering, KIIT University, Bhubaneswar (India) 751024

2 Professor, Mechanical Engineering Department Gandhi Institute for Technological Advancement (GITA), Bhubaneswar (India) 752054

Abstract

Theoretical investigation of turbulent flame impinging normally on plane surfaces has been done to determine the average Nusselt number and the plate heat flux distribution as functions of jet Reynolds number, equivalence ratio (ER) and separation distance (H/d). The analysis is established on mathematical formulation of the governing equations for conservation of mass, momentum and energy. The turbulence phenomena is analyzed by the help of RNG k-ε turbulence model. The radiative heat transfer model has been designed by using Discrete Ordinates (DO) radiation model. It has been found that the heat flux gradually increases with the radial distance towards the plate centre and attains a maximum value at a location slightly away from stagnation point. The peak value in the local heat flux comes closer to the stagnation point when the height between the plates and the nozzle increases. Effects of variation of dimensionless separation distance on heat transfer characteristics have been investigated. It is observed that heat flux gradually improves when the value of H/d changes from 12 to 8 and decreases near the stagnation region with the further decrease in H/d from 8 to 4.

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References

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Journal of Computational & Applied Research in Mechanical Engineering (JCARME)

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