Flameholder Combustion Instability Study

Abstract

A model has been developed which predicts the efficiency and low frequency response of a turbofan augmentor with conventional flameholders. The model evaluates the stability characteristics of the flameholders at low inlet temperature a with model for two-phase fuel flames. The driving potential for flow frequency instability is identified with excessive flameholder wake fuel- air ratio. The model is compared to engine experience, available literature and other models with favorable results. The relative stability characteristics of two forced mixing augmentor concepts were examined and the reduction in the dependence of overall efficiency on fuel-air ratio was found to be stabilizing. Recommendations for flameholder design procedures are presented. (Author)

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Document Details

Document Type
Technical Report
Publication Date
May 01, 1978
Accession Number
ADA058794

Entities

People

  • R. C. Ernst

Organizations

  • Pratt & Whitney

Tags

Communities of Interest

  • Air Platforms
  • Weapons Technologies

DTIC Thesaurus Topics

  • Chemical Reactions
  • Chemistry
  • Combustion
  • Computer Programs
  • Dynamic Response
  • Failure Mode And Effect Analysis
  • Fuel Injection
  • Fuel Injectors
  • Heat Energy
  • Heat Transfer
  • Latent Heat
  • Materials Laboratories
  • Materials Science
  • Thermodynamics
  • Turbines
  • Turbofan Engines
  • Turbulent Mixing

Readers

  • Aerial Delivery - Logistics and Supply Chain Management.
  • Aerodynamics.
  • Combustion science or combustion engineering.