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%20%20%20%20Homogeneous%20combustion%20characteristics%20of%20premixed%20methane-air%20mixtures%20in%20micro-combustors
Research article
  

Homogeneous combustion characteristics of premixed methane-air mixtures in micro-combustors


Junjie Chen, Wenya Song

School of Mechanical and Power Engineering, Henan Polytechnic University, Jiaozuo, Henan, China


Corresponding author :

Junjie Chen,
Tel: +8615138057627,
Email:

Received: October 27, 2015,   Accepted: November 25, 2015,   Published:


Abstract:

A two-dimensional elliptic computational fluid dynamics model of micro-combustors is solved to study the effects of wall thermal conductivity on homogeneous combustion characteristics of premixed methane-air mixtures. Numerical simulations were carried out using detailed chemical reaction schemes, detailed species transport, and heat transfer mechanisms in the solid wall. We have found that the wall thermal conductivity is very important as they determine the upstream heat transfer, which is necessary for flame ignition, and the material's integrity by controlling the existence of hot spots. Large transverse and axial gradients are observed even at these small scales under certain conditions. Regarding material lifetimes, higher wall thermal conductivities reduce the wall temperature gradients and hotspots and should be preferred.


Keywords: Homogeneous combustion; Combustion characteristics; Micro-combustion; Thermal conductivity; Thermal management; Computational fluid dynamics


Citation:

Junjie Chen. et al.. (2015) Homogeneous combustion characteristics of premixed methane-air mixtures in micro-combustors. j. of Physical and Chemical Sciences.V3I4 DOI: 10.15297/JPCS.V3I4.02


Copyright:

© 2015 Junjie Chen . This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.


      
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      Journal of Physical and Chemical Sciences