| 摘要 |
PURPOSE:To obtain high intensity combustion and to miniaturize the size of a combustion chamber, by constituting a burner in such a manner that the injection rate of mixed gas from burner ports is low in the center part, and is high on both sides of the secondary air injection ports. CONSTITUTION:Fuel and the primary air are injected into a combustion chamber 13 passing through burner ports 11, forming a flame. During this time, a distribution of injection speed of mixed gas draws a V-shaped curve of which center part 11 is low, since a water-cooled pipe 12 is provided to the center part of burner ports 11. On the other hand, the secondary air fed into a secondary air passage 15 is fed into a secondary air chamber 14, passing through rectifying ports 16, and is injected slantwise to be supplied to a flame from secondary air injection ports 18, provided to slants 17 on both sides. With such an arrangement, the length of a flame can be shortened, as the secondary air can easily be supplied to the center part of a flame, so that a core zone rapidly disappears. At the same time, a zone to expedite oxidizing reaction of unburnt composition is formed on both sides of burner ports 11, as the change in temperature in these places is large. Accordingly, high load combustion can be obtained, as well as miniaturization of the size of a combustion chamber. |
