To solve the problem that a non axi-symmetric and non-linear shaped gas turbine engine exhaust system generates a non-uniform core pressure field on a cooling liner, and an excessive cooling airflow is required.
Each metering sheet 38 is attached to an iso-grid rib 34 on a liner hot sheet 26 to form two or more subchambers 40'. The metering sheet 38 includes two or more metering sheet apertures 44, and a surface 36 between the ribs 34 of the liner hot sheet 26 includes two or more liner hot sheet apertures 46. By varying a ratio between the number of metering sheet apertures 44 and the number of hot sheet apertures 46, pressure in each chamber is defined to efficiently maintain the minimum pressure ratio across the liner hot sheet. Discrete chamberization also provides for a more efficient usage of cooling air which increases engine efficiency.
MURPHY J MICHAEL
BUEY JOHN R
Tomioka Kiyoshi
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