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  • Summary & Details

Study on effect of orifice diameter on turbulent jet by a visualized pre-chamber

可視化副室を用いた噴口径が副室ジェット形成に及ぼす影響の解明

Detailed Information

Author(J)1) 石井 映宇, 2) 古川 蒼, 3) 境田 悟志, 4) 田中 光太郎, 5) 金野 満, 6) 米谷 直樹, 7) 光藤 健太
Author(E)1) Terutaka Ishii, 2) Sou Furukawa, 3) Satoshi Sakaida, 4) Kotaro Tanaka, 5) Mitsuru Konno, 6) Naoki Yoneya, 7) Kenta Mitsufuji
Affiliation(J)1) 茨城大学, 2) 茨城大学, 3) 茨城大学, 4) 茨城大学, 5) 茨城大学, 6) (株)日立製作所, 7) (株)日立製作所
Affiliation(E)1) Ibaraki University, 2) Ibaraki University, 3) Ibaraki University, 4) Ibaraki University, 5) Ibaraki University, 6) Hitachi, Ltd., 7) Hitachi, Ltd.
Abstract(J)副室ジェット燃焼では噴孔径が主室予混合気の着火機構に影響をおよぼす.これは噴口での火炎の消炎などによると考えられているが,副室の可視化例はほとんどなく,異なる噴口径におけるジェット生成,主室予混合気の着火機構には不明な点が多い.そこで,本研究では可視化副室を用い噴口を含む副室内部の火炎を可視化した.また,数値解析,副室ジェットの観察により噴孔径が主室予混合気の着火におよぼす影響を調べた.

Translation

Abstract(E)With a turbulent jet ignition, the orifice diameter of pre-chamber is an important factor to improve the thermal efficiency. In this study, the effect of the orifice diameter on the combustion in pre-chamber and main-chamber was investigated by gasoline. The observation results by the 2D visualization pre-chamber and multi-holes pre-chamber showed that the small orifice led the instability of the ignition of the pre-mixture in main-chamber. This is because the temperature of turbulent jet was decreased by the heat loss in the orifice and the entrainment of pre-mixture in the main-chamber to the jet.

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