Accession Number:

ADA058794

Title:

Flameholder Combustion Instability Study

Descriptive Note:

Final rept. 1 Mar 1976-30 Sep 1977

Corporate Author:

PRATT AND WHITNEY WEST PALM BEACH FL GOVERNMENT PRODUCTS DIV

Personal Author(s):

Report Date:

1978-05-01

Pagination or Media Count:

167.0

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

Subject Categories:

  • Combustion and Ignition
  • Jet and Gas Turbine Engines

Distribution Statement:

APPROVED FOR PUBLIC RELEASE