High-speed microscopic camera technology was applied to observe and research RP-3 micro-scale pendant droplet combustion process

the micro bubble nucleation

growth and coalescence and overflow behavior process and droplet oscillations phenomenon. The results show that:①The location of the micro bubbles generated inside droplet.②The volume expansion of the droplet caused by the micro bubble in incipient evaporation.③The droplet oscillates caused by the bubble behavior in combustion.④The droplets stability combust (not burst) phenomenon. The role of surface tension is analyzed in pendant droplets combustion. It is established that the critical condition of stability combust combustion for pendant droplet

the critical characteristic valume within 2.5-5.0μL.