Theory of laminar flame propagation with non-normal diffusion

✍ Scribed by V.K. Jain; R.N. Kumar

• Publisher: Elsevier Science
• Year: 1969
• Tongue: English
• Weight: 899 KB
• Volume: 13
• Category: Article
• ISSN: 0010-2180
• DOI: 10.1016/0010-2180(69)90006-6

✦ Synopsis

A study has been made of the problem of steady, one-dimensional, laminar flame propagation in premixed gases, with the Lewis number differing from (and equal to) unity. Analytical solution, using the method of matched asymptotic expansions, have been obtained for large activation energies. Numerical solutions have been obtained for a wide range ofthe reduced activation temperature parameter (n -E/~Tb), and the Lewis number & The studies reveal that the flame speed eigenvalue is linear in Lewis number for first order and quadratic in Lewis number for second order reactions. For a quick determination of flame speeds, with reasonable accuracy, a simple rule, expressing the flame speed eigenvalue as a function of the Lewis number and the centroid of the reaction rate function, is proposed. Comparisons have been made with some of the earlier works, for both first and second order reactions.