Increasing compression efficiency

In a gas turbine engine having a high-pressure (HP) spool and a low-pressure (LP) spool, a method of increasing compression efficiency at a given thrust, comprising transferring mechanical power from the HP spool to the LP spool to reduce a corrected speed of a HP compressor and raise a working line...

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Bibliographische Detailangaben
1. Verfasser:	Caroline Louise Turner
Format:	Patent
Sprache:	eng
Schlagworte:	AIR INTAKES FOR JET-PROPULSION PLANTS BLASTING COMBUSTION ENGINES CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS CONVERSION OR DISTRIBUTION OF ELECTRIC POWER DYNAMO-ELECTRIC MACHINES ELECTRICITY ENGINE PLANTS IN GENERAL GAS-TURBINE PLANTS GENERATION HEATING HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS LIGHTING MACHINES OR ENGINES IN GENERAL MECHANICAL ENGINEERING NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAMTURBINES NON-POSITIVE DISPLACEMENT PUMPS POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC FLUIDS STEAM ENGINES WEAPONS
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Beschreibung
Zusammenfassung:	In a gas turbine engine having a high-pressure (HP) spool and a low-pressure (LP) spool, a method of increasing compression efficiency at a given thrust, comprising transferring mechanical power from the HP spool to the LP spool to reduce a corrected speed of a HP compressor and raise a working line of a LP compressor. Preferably, mechanical power is electrically transferred from a first electric machine (117, figure 2) operating as a generator and drivingly connected to the HP spool, to a second electric machine (119) drivingly connected to the LP spool. The method may be invoked when unsteady inlet flow detected, or when inlet distortion is detected. Both electric machines may be capable of operating as a motor and generator, i.e. as motor-generators. Power may be transferred from the first electric machine to the second electric machine via one or more power conversion stages.