Time-Resolved Analysis of Turbulent Mixing Flow Characteristics of Intermittent Multi-Hole Diesel Spray Using 2-D PDPA

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概要

• 論文の詳細を見る

• The turbulent mixing flow characteristics of an intermittent diesel spray were investigated. A 5-hole diesel nozzle (d_n=0.32mm) with a 2-spring nozzle holder, which is widely used in heavy-duty diesel engines, was tested. Time-resolved analysis of the turbulent mixing flow characteristics of the spray, injected intermittently into the still ambient air, was made under room temperature by using a 2-D PDPA system. The mean and the fluctuation velocities of the spray were measured. The axial velocity distribution shows similar to that of the free air jets at the downstream of the spray, and the distribution well coincides with the result proposed by Hinze at R/b<1.5. The turbulent intensity of the axial velocity component is high near the spray axis, and it decreases gradually with the increase in the radial distance. The turbulent shear stress increases with proceeding to the trailing edge as well as the downstream of the spray. The maximum value of the turbulent shear stress is observed near R/b ≈ 1.0, regardless of the evolution time. The turbulent shear stress in the central parts of the spray is lower than that of the continuous free air jets, whereas that in the trailing edge is considerably higher.

• 一般社団法人日本機械学会の論文
• 2003-08-15

著者

• Lee Jeekuen

  Department Of Mechanical System Engineering University Of Hiroshima

• KANG Shinjae

  Faculty of Mechanical and Aerospace System Engineering, Chonbuk National University

• RHO Byungjoon

  Faculty of Mechanical and Aerospace System Engineering, Chonbuk National University

• Rho Byungjoon

  Faculty Of Mechanical And Aerospace System Engineering Chonbuk National University

• Kang Shinjae

  Faculty Of Mechanical And Aerospace System Engineering Chonbuk National University

関連論文

• Time-Resolved Analysis of Turbulent Mixing Flow Characteristics of Intermittent Multi-Hole Diesel Spray Using 2-D PDPA

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