LEAN BURN COMBUSTION SYSTEM
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United States of America Patent
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Issued Date -
Jun 27, 2024
app pub date -
Jun 20, 2023
filing date -
Dec 21, 2022
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Abstract
A method of operating a gas turbine engine having a lean burn staged combustion system having a combustor in which fuel is combusted. The gas turbine engine includes a fuel-oil heat exchanger arranged to transfer heat between oil and fuel that is provided to the combustor. The method includes transferring heat from the oil to the fuel before the fuel enters the combustor so as to lower the fuel viscosity to 0.58 mm2/s or lower on entry to the combustor at cruise conditions.
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