| 摘要 |
PURPOSE:To improve liner cooling efficiency by a method wherein a film air forming means to form a film air layer is formed such that the flow direction of injection air is extended in the same direction as in the swirl direction of fuel gas. CONSTITUTION:Injection air from a film air forming means 6 flows in a liner with inclination theta as it is guide to a protruding weir 6b. In this case, since inclination of injection air is formed such that it is extended in the same direction as a flow direction BF of combustion gas, combustion gas BF and injection gas CAR flow in the same direction as each other, the two gases are prevented from agitated with each other or injection film air is prevented from being peeled by means of swirl flow-down combustion gas. Thus, even when the size of a burner liner 3 is low, a film air layer is not influenced by a combustion gas flow to form a constantly uniform film air layer. This constitution and method enables improvement of the cooling efficiency of a liner without increasing a liner size. |
