Power plants – Reaction motor – Liquid oxidizer
Reexamination Certificate
2004-03-02
2008-03-18
Casaregola, L. J. (Department: 3746)
Power plants
Reaction motor
Liquid oxidizer
C060S267000, C239S127100
Reexamination Certificate
active
07343732
ABSTRACT:
A combustion chamber/supersonic nozzle assembly is cooled by an array of coolant channels in the wall of the assembly with coolant being fed to the assembly at the throat plane between the subsonic (convergent) and supersonic (divergent) sections. A minor portion of the coolant entering at the throat plane is directed to coolant channels in the supersonic section wall, while the remainder is directed to a complex arrangement of channels in the subsonic section wall. The latter arrangement includes an outer layer of wide axially oriented channels for delivery of coolant to, and removal from, an inner layer of smaller, circumferentially oriented channels that are adjacent to the hot gas and carry the bulk of the coolant load. The path of coolant travel through each inner channel is relatively short, lessening the pressure drop through those channels relative to coolant channel arrangements of the prior art.
REFERENCES:
patent: 3224678 (1965-12-01), Rosman
patent: 3381897 (1968-05-01), Wennerstrom
patent: 3910039 (1975-10-01), Fortini
patent: 4055044 (1977-10-01), Dederra et al.
patent: 4223530 (1980-09-01), Kirner et al.
patent: 6244041 (2001-06-01), Vasin et al.
Aerojet-General Corporation
Casaregola L. J.
Heines M. Henry
Townsend and Townsend / and Crew LLP
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