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Finite element volume analysis of propane preheated air flame passing through a minichannel

Darbandi, M ; Sharif University of Technology

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  1. Type of Document: Article
  2. DOI: 10.1115/ICNMM2014-21832
  3. Abstract:
  4. A hybrid finite-element-volume FEV method is extended to simulate turbulent non-premixed propane air preheated flame in a minichannel. We use a detailed kinetics scheme, i.e. GRI mechanism 3.0, and the flamelet model to perform the combustion modeling. The turbulence-chemistry interaction is taken into account in this flamelet modeling using presumed shape probability density functions PDFs. Considering an upwind-biased physics for the current reacting flow, we implement the physical influence upwinding scheme PIS to estimate the cell-face mixture fraction variance in this study. To close the turbulence closure, we employ the two-equation standard κ-ε turbulence model incorporated with suitable wall functions. Supposing an optically thin limit, it needs to take into account radiation effects of the most important radiating species in the current modeling. Despite facing with so many flame instabilities in such small size configuration, the current method performs suitably with proper convergence, and the encountered instabilities are damped out automatically. Comparing with the experimental measurements, the current extended method accurately predicts the flame structure in the minichannel configuration
  5. Keywords:
  6. Air ; Combustion ; Probability density function ; Propane ; Radiation effect ; Turbulence model ; Turbulent flow ; Wall function ; Combustion model ; Detailed kinetics ; Flame instability ; Flamelet modeling ; Hybrid finite elements ; Turbulence closure ; Turbulence-chemistry interaction ; Turbulent non-premix ; Finite element method
  7. Source: ASME 2014 12th International Conference on Nanochannels, Microchannels, and Minichannels, ICNMM 2014, Collocated with the ASME 2014 4th Joint US-European Fluids Engineering Division Summer Meeting ; 2014
  8. URL: http://proceedings.asmedigitalcollection.asme.org/proceeding.aspx?articleid=2085659