Japan Aerospace Exploration Agency

Yoji Kurosawa

Takeshi Yamamoto

Seiji Yoshida

Kazuo Shimodaira

Kazuaki Matsuura

The object of the invention is to provide a lightweight mechanism that changes the distribution of a flow rate of air for combustion supplied into each burner, without providing a mechanical movable part in a passage for high-temperature and high-pressure air for combustion in a combustor having a plurality of burners such as a pilot burner and a main burner. The combustor equipped with an air flow rate distribution control mechanism based on a fluidic element in accordance with the present invention has a plurality of burners such as a main burner and a pilot burner, wherein with the fluidic element being disposed upstream of a passage of air for combustion that is supplied to each burner, and means for sucking out or blowing out air into a control air passage of the fluidic element being provided, the distribution of a flow rate of the air flowing into the burners is controlled by changing a flow direction of the air for combustion.

Combustor equipped with air flow rate distribution control mechanism using fluidic element

A main swirler of a triple annular configuration that is partitioned by a pre-filmer and a separator is installed in an inlet port of a main air flow channel. The vicinity of the inner wall of the main air flow channel provided with a main fuel injection port is bulged radially outward from the innermost surface (innermost surface of a small swirler) of a main swirler. Further, a distance from the main fuel injection port and the pre-filmer is set such that an effective opening area between the pre-filmer and 'the inner wall of the main air flow channel provided with the main fuel injection port' is equal to an effective opening area of the small swirler. The swirling directions of the swirlers of the main swirler are 'clockwise'-&#x201c;counter-clockwise&#x201d;-&#x201c;clockwise&#x201d; respectively along the radial outward direction when the swirling direction of the innermost swirler is taken as &#x201c;clockwise&#x201d;.

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Tokyo, Japan

Yoji Kurosawa