公开(公告)号：US20190032574A1

公开(公告)日：2019-01-31

申请号：US16044869

申请日：2018-07-25

Applicant: ROLLS-ROYCE plc

Inventor： Alan R. MAGUIRE ,  Timothy J. SCANLON ,  Luis F. LLANO ,  Paul A. SELLERS

IPC: F02C9/18 ,  F02C3/04 ,  F02K3/06

Abstract: A gas turbine engine has a core engine including: a compressor, combustion equipment which receives compressed air from the compressor, a circumferential row of nozzle guide vanes, and a turbine. The nozzle guide vanes defines a throat receiving hot working gases from the combustion equipment into the turbine. The gas turbine engine further has an air system which is switchably operable between an on-position which opens a diversion pathway along which a portion of the compressed air exiting the compressor bypasses the combustion equipment to join the hot working gases at re-entry holes located between the nozzle guide vanes and a rotor at the front of the turbine, thereby increasing the semi-dimensional mass flow ω(T30)0.5/(P30) of the core engine at the exit of the compressor, and an off-position which closes the diversion pathway, thereby decreasing the semi-dimensional mass flow of the core engine at the exit of the compressor.

公开(公告)号：US20170167273A1

公开(公告)日：2017-06-15

申请号：US15352468

申请日：2016-11-15

Applicant: ROLLS-ROYCE plc

Inventor： Alan R. MAGUIRE ,  Timothy J. SCANLON

IPC: F01D5/18 ,  F02C3/10 ,  F16K1/22 ,  F01D25/24 ,  F01D25/12 ,  F23R3/00 ,  F01D9/04

CPC classification number: F01D5/187 ,  F01D9/041 ,  F01D11/24 ,  F01D25/12 ,  F01D25/24 ,  F02C3/10 ,  F02C7/12 ,  F02C7/18 ,  F02C9/18 ,  F05D2220/32 ,  F05D2260/202 ,  F05D2270/3062 ,  F16K1/221 ,  F23R3/007 ,  Y02T50/672 ,  Y02T50/675

Abstract: A gas turbine engine includes a turbine and a turbine cooling arrangement. The turbine includes a turbine rotor surrounded by a static rotor track liner, and a nozzle guide vane downstream of the rotor in a core main gas flow path. The cooling arrangement includes a first air duct that provides cooling airflow to a rotor track liner cooling plenum and a second air duct that provides a cooling airflow to the nozzle guide vane. A common manifold is upstream in the cooling airflow of the ducts and provides cooling air to the ducts. A two-way valve modulates air provided to the ducts from the manifold. The valve is operates in a first or second mode. In the first mode, air flow to the first duct is relatively high and airflow to the second duct is relatively low compared to where the valve is operated in the second mode.