The Effect of Swirl on Gas-Centered Swirl Coaxial Injector Sprays

Abstract

Gas-centered swirl coaxial injector design criteria and scaling laws have been developed by AFRL over the last several years. These studies have predominately focused on the measurement and behavior of the liquid film and its relation to atomization efficiency. The spread and quality of the spray as well as its stability have received less attention. These parameters are the focus here and are shown to support the conclusions drawn from the liquid film studies. The spray width is used as the primary metric as the effects of swirl level, momentum flux ratio, liquid flow rate and inlet size/number are examined. The results suggest that the designer should aim for higher levels of swirl and momentum flux ratio and lower liquid mass flow rates to produce more stable sprays with better atomization.

Open PDF

Document Details

Document Type
Technical Report
Publication Date
Oct 13, 2011
Accession Number
ADA554873

Entities

People

  • Larry A. Villasmil
  • Malissa D. Lightfoot
  • Stephen A. Danczyk
  • Stephen Alexander Schumaker

Organizations

  • Air Force Research Laboratory

Tags

Communities of Interest

  • Weapons Technologies

DTIC Thesaurus Topics

  • Air Force Research Laboratories
  • Atomization
  • Boundaries
  • Computational Fluid Dynamics
  • Design Criteria
  • Efficiency
  • Flow
  • Flow Rate
  • Gas Flow
  • Geometry
  • Injectors
  • Mass
  • Mass Flow
  • Measurement
  • Momentum
  • Scaling Laws
  • Standards

Fields of Study

  • Chemistry

Readers

  • Combustion and Flow Dynamics.
  • Internal Combustion Engine (ICE) Technology.
  • Systems Analysis and Design