A series of experiments of flame stability in ceramic evaporaton cavity with different porosity at different osmotic oil flow rate have been completed in a model afterburner.Experimental results show that

in the case of the main oil supply only or with osmotic oil supply

there is an optimal porosity respectively

where extinction limit of lean poor mixed gas is the widest

with the osmotic oil suuly only

flame extinction limit of ceramic holder becomes wider as the porosity increases.Concerning the effect of the osmotic oil flow rate on the flame stability

the extinction limit becomes extended usually as the osmotic oil flow rate increases.