Study of Heterogeneous Structure in Diesel Fuel Spray by Using Micro-Probe L2F

• SAKAGUCHI Daisaku

  Graduate School of Science and Technology, Nagasaki University

• YAMAMOTO Shohei

  Graduate School of Science and Technology, Nagasaki University

• UEKI Hironobu

  Faculty of Engineering, Nagasaki University

• ISHDIA Masahiro

  Graduate School of Science and Technology, Nagasaki University

Abstract

A L2F (Laser 2-Focus velocimeter) was applied for the measurements of the velocity and size of droplets in diesel fuel sprays. The micro-scale probe of the L2F has an advantage in avoiding the multiple scattering from droplets in a dense region of fuel sprays. A data sampling rate of 15MHz has been achieved in the L2F system for detecting almost all of the droplets which passed through the measurement probe. Diesel fuel was injected into the atmosphere by using a common rail injector. Measurement positions were located along the spray axis at 10, 15, 20, 25, and 30 mm from the nozzle exit. Measurement result showed that the velocity and size of droplets decreased and the number density of droplets increased along the spray axis. It was clearly shown that the mass flow rate in the spray was highest near the spray tip and was lower inside the spray.

Journal

• Journal of Fluid Science and Technology

  Journal of Fluid Science and Technology 5 (1), 75-85, 2010

  The Japan Society of Mechanical Engineers

Keywords

• Breakup
• Droplet
• Velocity
• Size
• Number Density
• Optical Diagnostics

Details

• CRID: 1390282680221744256
• NII Article ID: 130000254334
• DOI: 10.1299/jfst.5.75
• ISSN: 18805558
• Web Site: http://www.jstage.jst.go.jp/article/jfst/5/1/5_1_75/_pdf
• Text Lang: en
• Data Source:
  • JaLC
  • Crossref
  • CiNii Articles
• Abstract License Flag: Disallowed