高圧力比高効率過給機の開発

概要

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What energy conservation was in the 1970s and 1989s for large marine diesel engines to achieve, higher output rating is becoming in recent years. Consequently, turbochargers serving such uprated main diesel engines are now faced with demands for the compressor ratio π_c which is high enough to match the increased engine power output. The turbocharger compressor pressure ratio, which now stands at as high as π_c=3.0 to 3.5 already, is expected to approach the even higher level of π_c=4.0 in the future. Important to achieving a high level of pressure ratio in the single-stage turbocharging are design considerations that ensure not only the compressor structural integrity adequate for that purpose but also its functional capability to operate at a high level of efficiency and with an appropriate margin of safety against the surging in the high-pressure region while at the same time staying adequately clear of the surging even in the low-pressure region as well. A new series of MET turbochargers developed by Mitsubishi Heavy Industries this time employing new, splitter bladed impeller are capable of meeting all such requirements.
社団法人日本船舶海洋工学会の論文
1991-03-29