Integrated CFD approach of the liquid atomization mechanism in an injector nozzle

Jun Ishimoto, Hidehiro Hoshina, Tadashi Tsuchiyama, Hideyuki Watanabe, Asako Haga

Research output: Contribution to conferencePaper

Abstract

3-D structure of liquid atomization behavior through an injector nozzle is numerically investigated and visualized by the new type of integrated simulation technique. The present CFD analysis is focusing on the consecutive breakup of liquid column, formation of liquid film, and the droplets generation of a lateral flow in the outlet section of nozzle. The governing equations for high-speed lateral atomizing injector nozzle flow based on the LES-VOF model in conjunction with the CSF model are presented, and then an integrated parallel computation are performed to clarify the detailed atomization process of a high speed nozzle flow and to acquire data which is difficult to confirm by experiment such as atomization length, liquid core shapes, droplets size distributions, spray angle and droplets velocity profiles. According to the present analysis, it is found that the atomization rate and the droplets-gas two-phase flow characteristics are controlled by the turbulence perturbation upstream of the injectornozzle, hydrodynamic instabilities at the gas-liquid interface, shear stresses between liquid core and periphery of the jet. Furthermore, stable and a high-resolution computation can be attained in the high density ratio (ρlg = 554) conditions conditions by using our numerical method.

Original languageEnglish
Publication statusPublished - 2006 Dec 1
Event10th International Conference on Liquid Atomization and Spray Systems, ICLASS 2006 - Kyoto, Japan
Duration: 2006 Aug 272006 Sep 1

Other

Other10th International Conference on Liquid Atomization and Spray Systems, ICLASS 2006
CountryJapan
CityKyoto
Period06/8/2706/9/1

Keywords

  • Droplets
  • Injector nozzle
  • Integrated CFD
  • Multiphase flow
  • Spray

ASJC Scopus subject areas

  • Surfaces, Coatings and Films

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  • Cite this

    Ishimoto, J., Hoshina, H., Tsuchiyama, T., Watanabe, H., & Haga, A. (2006). Integrated CFD approach of the liquid atomization mechanism in an injector nozzle. Paper presented at 10th International Conference on Liquid Atomization and Spray Systems, ICLASS 2006, Kyoto, Japan.