Markstein number

The Markstein number is a term used in combustion engineering and explosion studies. It characterizes the effect of local heat release of a propagating flame on variations in the surface area along the flame front and the associated local flame curvature. The Markstein length divided by the flame thickness is the Markstein number. The larger the Markstein length, the greater the effect of curvature on burning velocity.

Phenomenological Markstein numbers with respect to the combustion products are obtained by means of the comparison between the measurements of the flame radii as a function of time and the results of the analytical integration of the linear relation between the flame speed and either flame stretch rate or flame curvature.[1][2]

Gaseous flame propagation is a very complicated process due to interactions that take place between the flame and its environment.

See also

Notes

  1. ^ Karpov V. P. ; Lipanikov A. N.; Wolanski P.; Finding the Markstein number using the measurements of expanding spherical laminar flames; Combustion and flame ISSN 0010-2180; 1997, vol. 109, Number 3, pp. 436-448
  2. ^ Killingsworth N.J.; Aldredge R. C.; Influence of Markstein number on the parametric acoustic instability Chapter 7; Roy, Gabriel D.; Combustion processes in propulsion: control, noise, and pulse detonation; Elsevier Butterworth-Heineman; 2006 - 439 pages

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