REDUCING IDLE THRUST IN PROPULSIVE GAS TURBINE

The invention relates to reducing idle thrust in a propulsive gas turbine. A gas turbine engine 101 for an aircraft comprises a high-pressure (HP) spool comprising an HP compressor 105 and a first electric machine 117 driven by an HP turbine 107; a low-pressure (LP) spool comprising an LP compressor 104 and a second electric machine 119 driven by an LP turbine 108; and an engine controller 123 configured to identify a condition to the effect that the engine 101 is in an approach idle condition, and operate the first electric machine 117 in a motor mode and operate the second electric machine 119 in a generator mode to transfer power electrically from the LP spool to the HP spool to thereby reduce the LP spool rotational speed and increase the HP spool rotational speed. 本发明题为"减少推进气体涡轮中的怠速推力"。本发明公开了一种用于飞行器的气体涡轮引擎101，所述气体涡轮引擎包括高压(HP)滑阀，所述高压滑阀包括HP压缩机105和由HP涡轮107驱动的第一电机117；低压(LP)滑阀，所述低压滑阀包括LP压缩机104和由LP涡轮108驱动的第二电机119；以及引擎控制器123，所述引擎控制器被配置为识别使得所述引擎101处于接近怠速条件的条件，并且以马达模式操作所述第一电机117，并且以发电机模式操作所述第二电机119，以便以电的方式将功率从所述L