Spray Structure and Associated Droplet Velocity in the Initial Stage of Diesel Fuel Injection

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概要

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• This paper reports an experimental study of hith-pressue diesel fuel sprays in their initial stage of development. Diesel fuel is injected from a single-hole nozzle at an injection pressure of 50 MPa into a high-pressure vessel. The internal structure of the spray is visualized with a laser-induce fluorescence (LIF) method. A direct cross-correlation PIV technique is applied to the spray images acquired with a double-pulsed illumination system in order to measure the droplet velocity distributions in the intial stage of spray development. It is found that some droplets located slightly upstream of the spray tip can have substantially higher axial velocities than the droplets located on the spray tip. It is also found that some droplets near the spray tip have large radial velocities as if they are injected out of the spray core. These findings ae discussed in detail in conjunction with possible mechanisms for the generation of large-structures of diesel fuel sprays.

• 一般社団法人日本機械学会の論文
• 2000-11-15

著者

• Cao Zhao-min

  Ecotechnology System Laboratory Yokohama National University

• Nishino K

  Yokohama National Univ.

• Nishino Koichi

  Division Of Artificial Environment And Systems Yokohama National University

• Torii K

  Yokohama National Univ. Yokohama Jpn

• Torii Kahoru

  Dept. Of Mechanical Engineering And Materials Science Yokohama National University

• MIZUNO Shigehiro

  Dept. of Mechanical Engineering and Materials Science, Yokohama National University

• Mizuno Shigehiro

  Dept. Of Mechanical Engineering And Materials Science Yokohama National University

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