COMPRESSOR DIFFUSER AND GAS TURBINE

• Main Authors: YAMAMOTO HIROYUKI, AOYAMA KUNIAKI
• Format: Patent
• Language: English; Japanese
• Published: 21.06.2018
• Subjects: BLASTING; HEATING; LIGHTING; MECHANICAL ENGINEERING; NON-POSITIVE DISPLACEMENT PUMPS; POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS; WEAPONS

PROBLEM TO BE SOLVED: To provide a compressor diffuser capable of reducing pressure loss of compressed air supplied from a compressor to a combustion cylinder of a combustor.SOLUTION: A Compressor diffuser includes: a diffuser outer wall disposed between an outlet of a compressor and a combustion cylinder of a combustor, and constituted to allow at least a part of the compressed air to flow into the combustor; a diffuser inner wall disposed on the inside of the diffuser outer wall and limiting enlargement of a cross-sectional area of an enlarged flow channel defined between the diffuser outer wall and the diffuser inner wall; and at least one embedded duct opened on an outer surface of the diffuser inner wall, and communicating the enlarged flow channel and an inner flow channel defined in the inside of the diffuser inner wall. The diffuser outer wall has a fan-shaped opening with a rotating shaft as a center at a compressor side, and a width and a depth of the opening of the embedded duct are gradually increased from the compressor side toward a combustion cylinder side.SELECTED DRAWING: Figure 2 【課題】圧縮機から燃焼器の燃焼筒に供給される圧縮空気の圧力損失を低減することのできる圧縮機ディフューザを提供する。【解決手段】圧縮機ディフューザは、圧縮機の出口と燃焼器の燃焼筒との間に配置され、圧縮空気の少なくとも一部を燃焼器へと流入させるように構成されたディフューザ外壁と、ディフューザ外壁の内側に配置され、ディフューザ外壁との間に区画される拡大流路の断面積の拡大を制限するディフューザ内壁と、ディフューザ内壁の外表面に開口し、拡大流路とディフューザ内壁の内部に区画された内部流路とを連通する、少なくとも１つの埋め込み型ダクトと、を備え、ディフューザ外壁は、圧縮機側に回転軸を中心とする扇形状の開口を有し、埋め込み型ダクトの開口の幅及び深さは、圧縮機側から燃焼筒側に向けて徐々に大きくなっている。【選択図】 図２