A turbine shroud includes an annular shroud support joined to an annular outer casing and spaced radially inwardly therefrom to define an annular flow duct for receiving compressor bleed air. A plurality of shroud panels are joined to the shroud support and have a radially inner surface positionable radially above turbine rotor blades to define a tip clearance therebetween. An isolation shield is joined to the shroud support radially above the panels and includes a plurality of open-ended cells facing radially outwardly in the duct toward the outer casing for inducing drag in the bleed air flowable axially through the duct to thermally isolate the shroud support from the bleed air for controlling the tip clearance.
申请公布号
US5562408(A)
申请公布日期
1996.10.08
申请号
US19950470095
申请日期
1995.06.06
申请人
GENERAL ELECTRIC COMPANY
发明人
PROCTOR, ROBERT;LINGER, DAVID R.;DI SALLE, DAVID A.;BRASSFIELD, STEVEN R.;PLEMMONS, LARRY W.