| 摘要 |
PROBLEM TO BE SOLVED: To provide a premixing burner capable of suppressing the occurrence of calking in a premixing chamber.SOLUTION: A premixing burner 9 atomizing liquid fuel 102, mixing the atomized liquid fuel 102 with compressed air 100, and supplying a resultant mixture to a combustion chamber 7, comprises: a mixing chamber wall 20 that is a cylindrical member having a premixing chamber 200 formed in an inner circumferential portion and that includes a plurality of slits 201 in a circumferential trunk portion; and a liquid fuel nozzle 10 located on an upstream side of the mixing chamber wall 20. The slits 201 extend from the liquid fuel nozzle 10 to the combustion chamber 7 in a view from a side surface of the mixing chamber wall 20, are connected to the premixing chamber 200 along a tangent of the premixing chamber 200 in a view of a cross-section orthogonal to a central axis C of the mixing chamber wall 20 in an end portion near the liquid fuel nozzle 10, and are at least four slits present in a circumferential direction of the mixing chamber wall 20 so that the slits 201 adjacent in the circumferential direction contact each other on an inner circumferential surface of the mixing chamber wall 20 and a cross-section of the mixing chamber wall 20 separating these adjacent slits has a wedge shape.SELECTED DRAWING: Figure 2 |
