1. M.M. Alexeev, I.V. Smirnova Surgut state university 628412, Surgut, Russia CONDITIONS OF SPIN FLAME FRONT FORMATION PROPAGATING IN A NARROW SLOT

2. The purpose of this work The experimental study of the formation regularities of and propagation of the spin flame front in propane-air mixture in the narrow slot.

3. The experimental setup

4. Development of disturbances on the surface of the cylindrical flame front

5. Rupture of the flame front in the initial period after the ignition mixture

6. Formation of two separate spin nuclei

7. D - diffusion coefficient of lacking component a - thermal conductance coefficient of the propane-air mixture u f - visible front propagation velocity l - distance between plates of slot Existence range of gas spin flame front in the coordinates of Lewis and Peclet numbers:

8. Behavior of laminar flame in a narrow boundless slot I – region of laminar flame instability to small-scale perturbations II – region of the spin centers (spin nuclei) formation. III – region of formation of «tails» from the spin nuclei. IV – region of oscillatory instability and turbulence in flame.

9. The resulting patterns of fluid flow and heat and mass transfer in the spin flame front can identify a range of problems to solve urgent problems of increasing the efficiency of internal combustion engines.