Nozzle hole film formation and its link to spray characteristics in swirl-pressure atomizers for direct injection gasoline engines

M. Gavaises, E. Abo-Serie, C. Arcoumanis

Research output: Contribution to conferencePaper

6 Citations (Scopus)

Abstract

The numerical methodology used to predict the flow inside pressure-swirl atomizers used with gasoline direct injection engines and the subsequent spray development is presented. Validation of the two-phase CFD models used takes place against film thickness measurements obtained from high resolution CCD-based images taken inside the discharge hole of a pressure swirl atomizer modified to incorporate a transparent hole extension. The transient evolution of the film thickness and its mean axial and swirl velocity components as it emerges from the nozzle hole is then used as input to a spray CFD model predicting the development of both non-evaporating and evaporating sprays under a variety of back pressure and temperature conditions. Model predictions are compared with phase Doppler anemometry measurements of the temporal and spatial variation of the droplet size and velocity as well as CCD spray images. The results confirm that accurate estimation of the nozzle flow exit conditions plays a dominant role in the prediction of sprays injected from pressure-swirl atomizers, while the proposed methodology seems to offer significant improvements in the accuracy of the predicted spray structure.

Original languageEnglish
DOIs
Publication statusPublished - 1 Dec 2002
Externally publishedYes
EventSAE 2002 World Congress - Detroit, United States
Duration: 4 Mar 20027 Mar 2002

Conference

ConferenceSAE 2002 World Congress
CountryUnited States
CityDetroit
Period4/03/027/03/02

ASJC Scopus subject areas

  • Automotive Engineering
  • Safety, Risk, Reliability and Quality
  • Pollution
  • Industrial and Manufacturing Engineering

Fingerprint Dive into the research topics of 'Nozzle hole film formation and its link to spray characteristics in swirl-pressure atomizers for direct injection gasoline engines'. Together they form a unique fingerprint.

  • Cite this