Outlet nozzle and a method for manufacturing an outlet nozzle

a technology of outlet nozzle and manufacturing method, which is applied in the field of outlet nozzle, can solve the problems of increased weight, increased flow resistance, and premature failure of the outlet nozzle, and achieve the effect of reducing the roll momentum

Inactive Publication Date: 2007-06-28
VOLVO AERO CORP
View PDF8 Cites 8 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This design reduces roll momentum and pressure drop, enhances cooling efficiency, and extends the cyclic life of the nozzle by managing thermal stress and flow resistance without additional weight or complexity.

Problems solved by technology

Additionally, the entire inside surface of the nozzle must be covered to prevent “hot spots” which could result in premature failure of the nozzle.
These additional means often lead to increased weight and increased flow resistance.
Having long channels without any increase in cross section will also affect the coolant flow resistance negatively.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Outlet nozzle and a method for manufacturing an outlet nozzle
  • Outlet nozzle and a method for manufacturing an outlet nozzle

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0020]FIG. 1 shows a diagrammatic and somewhat simplified side view of an outlet nozzle 10 which is produced according to the present invention. The nozzle is intended for use in rocket engines of the type which uses a liquid fuel, for example liquid hydrogen. The working of such a rocket engine is previously known, per se, and is therefore not described in detail. The nozzle 10 is cooled with the aid of a cooling medium which is preferably also used as fuel in the particular rocket engine. The invention is, however, not limited to outlet nozzles of this type, but can also be used in engines in which the cooling medium is dumped after it has been used for cooling.

[0021] The outlet nozzle is manufactured with an outer shape that is substantially bell-shaped. Thus, the nozzle 10 forms a body of revolution having an axis of revolution 11 and a cross section which varies in diameter along said axis.

[0022] The nozzle in FIG. 1 has three longitudinally arranged sections 10a, 10b, 10c. I...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
temperatureaaaaaaaaaa
temperatureaaaaaaaaaa
diameteraaaaaaaaaa
Login to View More

Abstract

Method and arrangement for providing an outlet nozzle (10) for use in a liquid fuel rocket engine. The nozzle forms a body of revolution having an axis (11) of revolution and a cross section that varies in diameter along said axis. The nozzle has a wall structure having a plurality of mutually adjacent cooling channels, helically extending substantially in parallel from the inlet end (13) of the nozzle to its outlet end (14). The nozzle includes at least two longitudinally arranged sections (10a, 10b, 10c). A shift between a positive and a negative channel angle in the transition from one section to an adjacent section balances any roll momentum generated by friction of rocket exhausts against the nozzle wall.

Description

CROSS REFERENCE TO RELATED APPLICATIONS [0001] This application is a continuation patent application of International Application No. PCT / SE02 / 00020 filed 9 Jan. 2002 which was published in English pursuant to Article 21(2) of the Patent Cooperation Treaty, and which claims priority to Swedish Application No. 0100076-9 filed 11 Jan. 2001 and to U.S. Provisional Application No. 60 / 261,045 filed 11 Jan. 2001. Said applications are expressly incorporated herein by reference in their entireties.BACKGROUND OF INVENTION [0002] 1. Technical Field [0003] The present invention relates to the field of outlet nozzles for use in liquid fuel rocket engines. Also, the invention relates to a method for manufacturing these nozzles. The invention is especially intended for use with respect to cooled outlet nozzles for rocket motors driven by liquid fuel. [0004] 2. Background of the Invention [0005] During operation, a rocket nozzle is subjected to very high stresses, for example in the form of a ver...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & AuthorityApplications(United States)
IPC IPC(8): F02K11/00F02K99/00
CPCB23P15/008F02K9/97F02K9/972Y10T29/49346F05D2250/312F05D2250/35F05D2250/25
InventorHAGGANDER, JAN
OwnerVOLVO AERO CORP