EFFECTS OF JET FUEL CONSTITUENTS ON COMBUSTOR DURABILITY
NAVAL AIR ENGINEERING CENTER LAKEHURST NJ AERONAUTICAL ENGINE LAB
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The effects of fuel and combustion variables on liner temperatures and flame radiation of the J79 combustion chamber were investigated. The operating conditions were extended to higher in let air temperature to show the effect of operation with advanced jet engines. Liner temperatures and flame radiation intensity in a J79 combustion chamber are functions of both the luminometer number and the hydrogen content of the fuel. As liner temperature tends to level out above a luminometer number of 100 there is little to be gained from further increase in this parameter. An increase in J79 combustor inlet air temperature will result in increases in flame radiation and in the liner temperature rise above inlet air temperature. The relationships with luminometer number are similar to those at lower temperature. Both luminometer number and hydrogen content of a fuel will provide satisfactory correlations with flame radiation and liner tem peratures for future higher combustor inlet tem perature conditions. Liner temperatures in a jet engine combustor are directly proportinal to the intensity of the total flame radiation received by the liner. The position and intensity of the flame zone and the maximum liner temperature will vary with differences in combustor design and fuel type at a given set of operating conditions.
- Combustion and Ignition