Aviation Fuel Property Effects on Altitude Relight

Abstract

The major objective of this experimental program was to investigate the effects of fuel property variation on altitude relight characteristics. Four fuels with widely varying volatility properties (JP-4, Jet A and 2040 Solvent, and Diesel 2) were tested in a five-swirl-cup-sector combustor at inlet temperatures and flows representative of windmilling conditions of turbofan engines. The effects of fuel physical properties on atomization were eliminated by using four sets of pressure-atomizing nozzles designed to give the same spray Sauter mean diameter (50 +,- 10 um) for each fuel at the same design fuel flow. A second series of tests was run with a set of air-blast nozzles. With comparable atomization levels, fuel volatility assumed only a secondary role for first-swirl-cup lightoff and complete blowout. Full propagation and first-cup blowout were independent of fuel volatility and depended only on the combustor operating conditions. Keywords: Gas Turbine Combustion, Altitude Relight, Ignition, Fuel Property Effects.

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Document Details

Document Type
Technical Report
Publication Date
May 01, 1987
Accession Number
ADA183088

Entities

People

  • K. S. Venkataramani

Organizations

  • General Electric

Tags

Communities of Interest

  • Air Platforms
  • Materials and Manufacturing Processes

DTIC Thesaurus Topics

  • Aviation Fuels
  • Boiling Point
  • Chemical Properties
  • Combustion
  • Diesel Fuels
  • Flow Rate
  • Fuel Injectors
  • Fuels
  • Gas Turbines
  • Geometry
  • Heat Energy
  • Heat Transfer
  • Ignition
  • Measurement
  • Physical Properties
  • Turbines
  • Two Dimensional

Readers

  • Aerospace Engineering
  • Internal Combustion Engine (ICE) Technology.
  • Petroleum Engineering