By using numerical method

the numerical simulation of flame radiation heat transter at certain oil-air ratio and inlet air flow temperature

as well as the pressure in combuster being 0.6

1.0

1.2

and 1.4 MPa respcetively

has been carried out

the results show that the concentration of smoke particles in the main combustion zone and the radiation heat flow rate in flame barrel wall increase rapidly as the pressure in combuster increases

however

the increasing speed rate is gentle;the temperature in main combustion zone has a decreasing tendency as the pressure increases:the temperature of fuel gas is gradually decreasing along the axial direction of flame barrel

and decreasing drastically from the main combustion zone to the intermediate zone

and its decreasing speed rate turns to quick as the pressure increases

but the pressure change has little effect upon the mixedly burning zone.