초록 ▼

A combustor comprises a passage area changing mechanism which relatively moves a flame holder relative to a premixed combustion nozzle in an axial direction so that the area of passage for premixed gas between an injection edge of the premixed combustion nozzle and a peripheral edge of the flame hol

A combustor comprises a passage area changing mechanism which relatively moves a flame holder relative to a premixed combustion nozzle in an axial direction so that the area of passage for premixed gas between an injection edge of the premixed combustion nozzle and a peripheral edge of the flame holder can be changed. Stable combustion can be maintained over a wide load range and reduction in NOx can be achieved.

대표청구항 ▼

A combustor comprising: a combustion cylinder formed in a cylindrical form around a virtual combustor axis directed to a predetermined direction to have an interior space to be provided as a combustion chamber; a diffusion combustion nozzle for injecting a fuel into said combustion chamber to form a

A combustor comprising: a combustion cylinder formed in a cylindrical form around a virtual combustor axis directed to a predetermined direction to have an interior space to be provided as a combustion chamber; a diffusion combustion nozzle for injecting a fuel into said combustion chamber to form a diffusion flame; a premixed combustion nozzle provided adjacent to said diffusion combustion nozzle, and having a passage extending in parallel to said virtual combustor axis for letting a premixed gas of a fuel and air pass therethrough, and an injection slot for injecting said premixed gas which has passed said passage into said combustion chamber in a direction parallel to said virtual combustor axis; a flame holder formed in the vicinity of said injection slot of said premixed combustion nozzle and within said combustion chamber, and having a first slanted surface for directing said premixed gas from said premixed combustion nozzle toward a downstream side with respect to a direction in which said premixed gas is injected from said premixed combustion nozzle while directing said premixed gas towards said diffusion combustion nozzle and a second surface extending from a downstream edge of said first slanted surface in a direction substantially perpendicular to and away from said virtual combustor axis to form a circulating flow of a combustion gas generated as a result of the combustion of said premixed gas; and a passage area changing mechanism for moving at least one of said premixed combustion nozzle and said flame holder relative to each other in the direction parallel to said virtual combustor axis to change the passage area between said injection slot of said premixed combustion nozzle and said downstream edge of the first slanted surface of said flame holder through which said premixed gas passes.