Transpiration Cooling Washer Assembly.
DEPARTMENT OF THE AIR FORCE WASHINGTON D C
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This invention relates generally to transpiration cooling, and more particularly, to the stacked washer type of transpiration cooled rocket engine. A transpiration cooling washer assembly has a relatively thin washer element in which a pattern of holes is etched completely through to define a primary slot for metering coolant, and a plurality of secondary metering slots, which is assembled on top of a relatively thicker washer element having a pattern of channels etched only partially therethrough. The slots within the thin washer element form the coolant flow control passages while the thicker washer element provides the coolant distribution plenums and manifold areas. The unitary two-part washer design provides for selectively choosing a desired hydraulic resistance simply by rotating the two washer elements with respect to each other at time of assembly.
- Rocket Engines