公开(公告)号：US20180178920A1

公开(公告)日：2018-06-28

申请号：US15846994

申请日：2017-12-19

Applicant: ROLLS-ROYCE plc

Inventor： Peter SWANN ,  Paul FLETCHER ,  Alvise PELLEGRINI ,  Ashog KULATHASAN

IPC: B64D27/24 ,  B64D31/06 ,  F02C9/48

Abstract: This invention concerns an aircraft propulsion system in which an engine has an engine core comprising a compressor, a combustor and a turbine driven by a flow of combustion products of the combustor. At least one propulsive fan generates a mass flow of air to propel the aircraft. An electrical energy store is provided on board the aircraft. At least one electric motor is arranged to drive the propulsive fan and the engine core compressor. A controller controls the at least one electric motor to mitigate the creation of a contrail caused by the engine combustion products by altering the ratio of the mass flow of air by the propulsive fan to the flow of combustion products of the combustor. The at least one electric motor is controlled so as to selectively drive both the propulsive fan and engine core compressor.