PDA measurement of transient spray formed by a disi multi-hole injector

Nobuyuki Kawahara, Eiji Tomita, Hiroaki Nakasuji, Mamoru Sumida

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Citations (Scopus)

Abstract

The droplet characteristics of unsteady fuel spray formed by multi-hole injector used in direct injection gasoline engine was investigated. In order to understand the detail structure of transient spray, a phase Doppler anemometer was used. The traverse system of the vessel was designed to obtain two-dimensional structure of spray. The laser power at measurement volume was optimized in order to detect relative smaller droplets. It is necessary to evaluate the effect of laser power of measurement volume on detection limit of smaller droplets under 10 μm. Phase locking method was used to analyze ensemble mean value of axial/radial droplet velocity, axial/radial slip velocity, relative droplet Reynolds number, and droplet turbulent kinetic energy. As a result, smaller droplets under 10 μm can follow the entrainment vortex at the spray shell. On the other hand, larger droplets over 30 μm have larger velocity to penetrate the entrainment vortex. Intermediate droplets of 15

Original languageEnglish
Title of host publication10th International Conference on Liquid Atomization and Spray Systems, ICLASS 2006
Publication statusPublished - 2006
Event10th International Conference on Liquid Atomization and Spray Systems, ICLASS 2006 - Kyoto, Japan
Duration: Aug 27 2006Sep 1 2006

Other

Other10th International Conference on Liquid Atomization and Spray Systems, ICLASS 2006
CountryJapan
CityKyoto
Period8/27/069/1/06

Fingerprint

Personal digital assistants
Volume measurement
Vortex flow
Lasers
Anemometers
Direct injection
Kinetic energy
Gasoline
Reynolds number
Engines

Keywords

  • Entrainment structure
  • Multi-hole injector
  • Size-classified droplet behavior
  • Turbulent kinetic energy

ASJC Scopus subject areas

  • Surfaces, Coatings and Films

Cite this

Kawahara, N., Tomita, E., Nakasuji, H., & Sumida, M. (2006). PDA measurement of transient spray formed by a disi multi-hole injector. In 10th International Conference on Liquid Atomization and Spray Systems, ICLASS 2006

PDA measurement of transient spray formed by a disi multi-hole injector. / Kawahara, Nobuyuki; Tomita, Eiji; Nakasuji, Hiroaki; Sumida, Mamoru.

10th International Conference on Liquid Atomization and Spray Systems, ICLASS 2006. 2006.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Kawahara, N, Tomita, E, Nakasuji, H & Sumida, M 2006, PDA measurement of transient spray formed by a disi multi-hole injector. in 10th International Conference on Liquid Atomization and Spray Systems, ICLASS 2006. 10th International Conference on Liquid Atomization and Spray Systems, ICLASS 2006, Kyoto, Japan, 8/27/06.
Kawahara N, Tomita E, Nakasuji H, Sumida M. PDA measurement of transient spray formed by a disi multi-hole injector. In 10th International Conference on Liquid Atomization and Spray Systems, ICLASS 2006. 2006
Kawahara, Nobuyuki ; Tomita, Eiji ; Nakasuji, Hiroaki ; Sumida, Mamoru. / PDA measurement of transient spray formed by a disi multi-hole injector. 10th International Conference on Liquid Atomization and Spray Systems, ICLASS 2006. 2006.
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AB - The droplet characteristics of unsteady fuel spray formed by multi-hole injector used in direct injection gasoline engine was investigated. In order to understand the detail structure of transient spray, a phase Doppler anemometer was used. The traverse system of the vessel was designed to obtain two-dimensional structure of spray. The laser power at measurement volume was optimized in order to detect relative smaller droplets. It is necessary to evaluate the effect of laser power of measurement volume on detection limit of smaller droplets under 10 μm. Phase locking method was used to analyze ensemble mean value of axial/radial droplet velocity, axial/radial slip velocity, relative droplet Reynolds number, and droplet turbulent kinetic energy. As a result, smaller droplets under 10 μm can follow the entrainment vortex at the spray shell. On the other hand, larger droplets over 30 μm have larger velocity to penetrate the entrainment vortex. Intermediate droplets of 15

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