METHOD FOR IMPROVING THE PERFORMANCE OF A BYPASS TURBOJET ENGINE

METHOD FOR IMPROVING THE PERFORMANCE OF A BYPASS TURBOJET ENGINE

The engine has a cooling air nozzle (T) with a throat arranged before a cooling air outlet orifice (6). An annular section of the throat has a nominal area fixed by thermodynamic cycle of the engine and lower than an area of the orifice such that a convergent-divergent nozzle (15) is formed at a rea...

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Hauptverfasser: CROSTA, Frank, PRAT, Damien
Format: Patent
Sprache:eng ; fre ; ger
Schlagworte:
BLASTING
COMBUSTION ENGINES
HEATING
HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
JET-PROPULSION PLANTS
LIGHTING
MECHANICAL ENGINEERING
WEAPONS
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creator CROSTA, Frank
PRAT, Damien
description The engine has a cooling air nozzle (T) with a throat arranged before a cooling air outlet orifice (6). An annular section of the throat has a nominal area fixed by thermodynamic cycle of the engine and lower than an area of the orifice such that a convergent-divergent nozzle (15) is formed at a rear part of an annular cooling air channel (12). The area of the orifice is adapted to a reference value of an expansion ratio of cooling air (9) comprised between extreme values of expansion ratios respectively corresponding to starting and ending of a cruising phase. An independent claim is also included for a method for improving performances of a ducted fan turbine engine that is mounted on an aircraft before accomplishing a determined flight mission.
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subjects BLASTING
COMBUSTION ENGINES
HEATING
HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
JET-PROPULSION PLANTS
LIGHTING
MECHANICAL ENGINEERING
WEAPONS
title METHOD FOR IMPROVING THE PERFORMANCE OF A BYPASS TURBOJET ENGINE
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