1. Investigation of soot transport and radiative heat transfer in an ethylene jet diffusion flame
- Author
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Thirumalachari Sundararajan, C.B. Saji, and Chakravarthy Balaji
- Subjects
Fluid Flow and Transfer Processes ,Jet (fluid) ,Number density ,Mechanical Engineering ,Diffusion flame ,Reynolds number ,Thermodynamics ,Laminar flow ,Air ,Bioconversion ,Diffusion ,Dust ,Ethylene ,Flame spraying ,Flammability ,Fluid dynamics ,Fluid mechanics ,Heat exchangers ,Heat radiation ,Heat transfer ,Heating equipment ,Jets ,Mass transfer ,Nanofluidics ,Photoacoustic effect ,Radiative transfer ,Rate constants ,Semiconductor doping ,Soot ,Steel analysis ,Thermoanalysis ,Volume fraction ,(R ,S)-symmetric ,Ambient air (AA) ,Co-flow ,Cylindrical coordinates ,Diffusion flame (DF) ,Elsevier (CO) ,Experimental investigations ,Experimental results ,Finite volume codes ,Finite-rate chemistry ,Flame height ,Fuel jets ,Heat and mass transfer (HMT) ,jet diffusion flames ,mass fractions ,Navier Stokes equations ,number densities ,oxidation processes ,Parametric studies ,Radiative heat transfer ,Reaction mechanisms ,Reasonable agreement ,Reynolds (CO) ,Soot growth ,species conservation ,Transport modelling ,Two-equation ,Condensed Matter Physics ,medicine.disease_cause ,Physics::Fluid Dynamics ,symbols.namesake ,symbols ,medicine ,Physics::Chemical Physics - Abstract
Numerical and experimental investigations highlighting the heat and mass transfer phenomena in a laminar co-flowing jet diffusion flame have been carried out. The fuel under consideration is ethylene, with ambient air as the co-flowing oxidizer. The diffusion flame is modeled using a 17-step reduced reaction mechanism with finite rate chemistry and the effects of soot on the radiative heat transfer of the flame have been demonstrated. Soot growth and oxidation processes are studied using a two-equation transport model, while the radiative heat transfer is modeled using the P1 approximation. An in-house finite volume code has been developed to solve the axi-symmetric Navier-Stokes equations in cylindrical coordinates, along with the soot mass fraction, soot number density, energy and species conservation equations. Comparison of predictions with experimental results shows reasonable agreement with regard to the flame height and temperature distribution. A parametric study is also presented, which illustrates the effects of the fuel jet Reynolds number and the flow rate of co-flow air. � 2008 Elsevier Ltd. All rights reserved.
- Published
- 2008