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：US20180073372A1

公开(公告)日：2018-03-15

申请号：US15686737

申请日：2017-08-25

Applicant: ROLLS-ROYCE plc

Inventor： Martin MOTTRAM ,  Paul A. SELLERS

IPC: F01D5/18 ,  F01D5/14

Abstract: A blade has a root portion and elongate portion extending from the root portion to a tip. The elongate portion has an aerofoil-shaped cross section having leading and trailing edges and suction and pressure sides. The tip may include a gutter defining squealer. The squealer has a wall extending from the trailing edge and along a substantial portion of the tip perimeter. A main trailing edge cooling channel extends within the elongate portion in a direction from root to tip adjacent the trailing edge and exiting into the gutter. A gallery channel is arranged just behind the gutter and extends from an open end intersecting the main trailing edge cooling channel to a closed end located just behind a trailing edge apogee. Cooling channels extend from the gallery channel and through the squealer wall. The gallery channel diameter is greater at the open end than the closed end.