Fundamental Characteristics of Squish Flow in D. I. Diesel Engine

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概要

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• Fundamental characteristics of air motion in the combustion chamber induced only by squish flow were investigated by using model research engine. The spatial distributions of mean velocity and turbulence intensity, and turbulence scales measured by hot-wire anemometry are presented for variations of inlet orifice diameter of the chamber and engine speed. From these results, the following were concluded. Spatially-avaraged mean velocity at TDC is greater than half of the maximum theoretical squish velocity for an aspect ratio of orifice diameter of 0.4. Turbulence intensity and turbulence scales are less than those of swirl flow. Mean velocity and turbulence intensity increase proportionally with engine speed, but flow pattern and turbulence length scales are unchanged.

著者

• Takamoto Yoshihisa

  Faculty Of Engineering Kanazawa University

• Gyakushi Nobuhiko

  Faculty Of Engineering Kanazawa University

関連論文

• Influence of Uneven Distribution of Combustion Gas in the Cylinder on the Combustion of a Diesel Engine : 3rd Report, Correlation between Speed of Combustion and Concentration Distribution of Combustion Gas
• Study on the Cycle-by-Cycle Variation in Diesel Engines
• On the Uniformity of Combustion Gas Composition in the Exhaust Stroke in Diesel Engines
• Influence of Uneven Distribution of Combustion Gas in the Cylinder on the Combustion of a Diesel Engine : 2nd Report, the Controlling Factors for the Formation of Concentration Distribution of Combustion Gas
• Fundamental Characteristics of Squish Flow in D. I. Diesel Engine

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