Wall surface structure having an improved radiant heat discharge capability

US4890454A · kind A · utility

Assignee

• Messerschmitt Bolkow Blohm GmbH · DE

Inventors

• Guenther Schmidt · Tauberbischofsheim, DE
• Peter Schmid · Rain, DE

Key dates

• Filing date: Mar 30, 1989
• Grant date: Jan 2, 1990
• Expiry date: Mar 30, 2009

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S165/904
• WIPO field: Thermal processes and apparatus
• WIPO sector: Mechanical engineering

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.