Effects of C/O Ratio and Temperature on Sooting Limits of Spherical Diffusion Flames | Zendy

Vivien Lecoustre | Zendy; Peter B. Sunderland | Zendy; B.H. Chao | Zendy; David L. Urban | Zendy; Dennis P. Stocker | Zendy; Richard L. Axelbaum | Zendy

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Effects of C/O Ratio and Temperature on Sooting Limits of Spherical Diffusion Flames

Author(s) -

Vivien Lecoustre,

Peter B. Sunderland,

B.H. Chao,

David L. Urban,

Dennis P. Stocker,

Richard L. Axelbaum

Publication year - 2008

Publication title -

45th aiaa aerospace sciences meeting and exhibit

Language(s) - English

Resource type - Conference proceedings

DOI - 10.2514/6.2008-827

Subject(s) - diffusion , materials science , thermodynamics , aspect ratio (aeronautics) , physics , composite material

‡‡ Limiting conditions for soot particle inception in spherical diffusion flames were investigated numerically. The flames were modeled using a one-dimensional, time accurate diffusion flame code with detailed chemistry and transport and an optically thick radiation model. Seventeen normal and inverse flames were considered, covering a wide range of stoichiometric mixture fraction, adiabatic flame temperature, residence time and scalar dissipation rate. These flames were previously observed to reach their sooting limits after 2 s of microgravity. Sooting-limit diffusion flames with scalar dissipation rate lower than 2 s -1 were found to have temperatures near 1400 K where C/O = 0.51, whereas flames with greater scalar dissipation rate required increased temperatures. This finding was valid across a broad range of fuel and oxidizer compositions and convection directions.

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