ARO 312 Lec 7 Combustion Chambers

Card Set Information

Author:
jncunningham
ID:
276473
Filename:
ARO 312 Lec 7 Combustion Chambers
Updated:
2014-06-09 17:13:32
Tags:
aro 312 combustion chambers jet propulsion
Folders:
Aro 312
Description:
ARO 312 Lec 7 Combustion Chambers
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  1. Equivalence ratio needed to lower inlet temperatures in order to increase chamber life
    0.4~0.5
  2. What is the equivalence ratio?
    phi = factual / fstoich

    where f = mfuel / moxidizer
  3. First stage where air and fuel mix near stoichiometric proportions
    Primary inlet zone -> primary combustion zone
  4. Combustion chamber types
    • Single Can (Tubular)
    • Multi-Can
    • Can Annular
    • Annular Only
  5. Combustor configuration: for smaller aircraft with centrifugal compressors
    Reversed Flow compressor
  6. Combustor configuration: primary type for large jet a/c
    Straight Through Flow compressor
  7. Combustion Zones
    Primary, intermediate, dilution
  8. Combustor cooling methods
    • Convection
    • Impingement
    • Film (air injected through holes)
    • Transpiration (air injected through pores)
    • Radiation
  9. Combustion pollutants
    • Smoke
    • Oxides of Carbon (ex CO, CO2)
    • Oxides of Nitrogen (ex NO)
    • Unburned hydrocarbon fuel (UHC)

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