PURPOSE: To reduce flame temperature to improve the durability of the wall of a combustion chamber and contrive the reduction of the discharging amount of NOx, by a method wherein flame is formed in the combustion chamber and the flame or exhaust gas is collided against the wall of the combustion chamber while cooling air is collided against the wall of the combustion chamber so as to be opposed to the flame or the exhaust gas.
CONSTITUTION: When a mixture 25, supplied from flame ports 11, is ignited, flame 26 is formed. The flame 26 or exhaust gas 27 of a high temperature collides against the wall 10 of a combustion chamber. As a result, the wall 10 of the combustion chamber is heated; therefore, the temperature increase of a part 32, against which the flame is collided, is large. Further, flame temperature is reduced and the discharging amount of NOx is reduced. Air ports 19 are arranged so as to be opposed to the flame ports 11 through the wall 10 of the combustion chamber to supply cooling air 28 through the air ports 19 and collide it against the wall 10 of the combustion chamber. In this case,, the part 32, against which the flame is collided, and another part 33, against which the cooling air is collided, become points of stagnation and a heat transfer coefficient on these positions is very large. The temperature of the tip end 34 of the flame is the highest in the flame 26. Accordingly, much amount of the heat of the flame 26 is transferred to the cooling air, whereby the flame temperature may be reduced and the temperature of the wall 10 of the combustion chamber may be kept in low.
OKAMOTO KENYA
FUJITA TATSUO
NAGAMITSU SACHIO
| JPS60178213A | 1985-09-12 | |||
| JPS59108053A | 1984-06-22 | |||
| JPS5888517A | 1983-05-26 |