Convergent-divergent film coolant passage

Details Convergent-divergent film coolant passage Convergent-divergent film coolant passage

F - Mech Eng,Light,Heat,Weapons

01

D

170/1

F01D 5/18 (2006.01)

Patent

CA 1275052

Abstract Convergent-Divergent Film Coolant Passage A coolant passage through a wall to be cooled, such as the wall of a hollow airfoil, is shaped and oriented to eject coolant fluid therefrom within the boundary layer of hot gases flowing over the surface to film cool the wall downstream of the outlet. The passage includes a metering portion near its inlet, followed by a diffusing portion and nozzle portion. The nozzle portion, adjacent the outlet, simultaneously diverges and converges in mutually perpendicular directions to produce a more uniform coolant velocity profile, which results in increased coolant area coverage and improved cooling effectiveness.

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