Liquid Fueled Ramjet combustion Instability: Acoustical and Vortical Interactions with Burning Sprays

Abstract

A theoretical/computational study of liquid-fueled ramjet instability has been performed. The roles of droplet vaporization and spray combustion processes have been determined as rate-controlling factors on the performance and stability of combustors. The effects of vaporization, mixing, turbulent transport, and chemical kinetics were evaluated. The impact of variations in geometry, initial droplet size, equivalence ratio, and various numerical factors were determined. The study had four major components: (i) individual droplet studies, (ii) a one-dimensional combustor analysis, (iii) a planar combustor study, and (iv) an axisymmetric study. A predictive capability was developed. Vaporization processes and droplet trajectories were found to affect performance and stability significantly. (jes)

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Document Details

Document Type
Technical Report
Publication Date
May 15, 1990
Accession Number
ADA222752

Entities

People

  • K. Molavi
  • R. Bhatia
  • William A. Sirignano

Organizations

  • University of California, Berkeley

Tags

Communities of Interest

  • Energy and Power Technologies
  • Materials and Manufacturing Processes
  • Weapons Technologies

DTIC Thesaurus Topics

  • Acoustics
  • Blood Coagulation Factors
  • Boundary Layer
  • Chemical Kinetics
  • Combustion
  • Computational Fluid Dynamics
  • Energy
  • Equations
  • Flow Fields
  • Fluid Dynamics
  • Frequency
  • Geometry
  • Heat Transfer
  • Reynolds Number
  • Standing Waves
  • Turbulent Mixing
  • Two Dimensional

Readers

  • Combustion and Flow Dynamics.
  • Internal Combustion Engine (ICE) Technology.
  • Quantum Chemistry