Air delivery system for regulating thermal growth

Details Air delivery system for regulating thermal growth Air delivery system for regulating thermal growth

F - Mech Eng,Light,Heat,Weapons

01

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341/106, 170/69

F01D 5/20 (2006.01) F01D 11/24 (2006.01) F02C 7/20 (2006.01)

Patent

CA 1119524

13DV-7256 AIR DELIVERY SYSTEM FOR REGULATING THERMAL GROWTH Abstract A timing valve is responsive to certain hydraulic rotor speed input signals so as to schedule increased temperatures of air to a turbine shroud support in accordance with the thermal time constants of the rotor. Clearance between the rotor and the shroud is thereby minimized during both transient and steady-state operating conditions. Temperatures are incremen- tally increased by selectively combining air from the compressor fifth and ninth stage bleed manifolds. Under certain operating conditions, the timing valve is pre-empted and air is provided at a predetermined temperature level as a function of rotor speed only.

331748

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