Patent · US Expired

Apparatus for controlling the heat transfer to the nozzle wall of expander cycle rocket engines

US6675571B2 · kind B2 · utility

0Cited by

7References

3Claims

0Family size

Assignee

Volvo Aero Corporation · SE

Inventors

Arne Boman · Strömsund, SE
Jan Lundgren · Grundsund, SE
Mats Olofsson · carrer de Sertori, SE

Key dates

Filing date	Nov 15, 2001
Grant date	Jan 13, 2004
Priority date	—
Expiry date	Dec 28, 2021

Classification

Technology area (CPC F)Mechanical Engineering; Lighting; Heating
CPC primaryF02K9/97
WIPO fieldEngines, pumps, turbines
WIPO sectorMechanical engineering

Abstract

The invention relates to an apparatus for increasing the heat transfer to the coolant at the inside of a nozzle wall provided with coolant channels of expander cycle rocket engines. To achieve this the invention proposes that, to disturb the boundary layer at the nozzle wall and thereby increasing the heat transfer, the inside of the nozzle wall facing the flame has a particularly chosen increased surface roughness of such a magnitude that it penetrates the viscous sub-layer of the boundary layer at the nozzle wall.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.