Power plants – Reaction motor – Including heat exchange means
Patent
1989-03-30
1990-01-02
Ford, John
Power plants
Reaction motor
Including heat exchange means
60257, 165 47, 165133, 165169, 165904, F02K 964, F28F 1318, B64G 126, H01L 2336
Patent
active
048904546
ABSTRACT:
The wall of a structural component that is subject to high thermal and mechanical stress, such as a position control rocket drive, has a plurality of grooves in its surface for an improved heat discharge by radiation emission. The grooves are cut into the wall surface and have a substantially U-type cross-sectional shape with parallel sidewalls and a substantially rounded groove bottom. The heat emission efficiency is substantially improved by making the groove depth (t) to be about 100 .mu.m and the groove width (b) to be at least 20% of the groove depth, thus (t/b) is at least 5. Additionally, the maximally permissable groove shape tolerance over the entire groove length must be .+-.1 .mu.m and the smallest spacing between neighboring grooves is about 10 .mu.m.
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Schmid Peter
Schmidt Guenther
Fasse W. G.
Ford John
Kane, Jr. D. H.
Messerschmitt-Boelkow-Blohm GmbH
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