Outlet nozzle and a method for manufacturing an outlet nozzle
AssigneeVolvo Aero Corporation
InventorJan HAGGANDER
Life of this patent
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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.
Claims12
An outlet nozzle (10) for use in a liquid fuel rocket engine comprising:
- a nozzle body having an axis (11) of revolution and a cross section which varies in diameter along said axis, said body having a wall structure comprising a plurality of mutually adjacent cooling channels (12) helically extending substantially in parallel from the inlet end (13) of the nozzle to its outlet end (14);
- the nozzle (10) further comprising at least two longitudinally arranged sections (10a, 10b) and a shift between a positive and a negative channel angle in the transition from one section to an adjacent section.
A method for manufacturing an outlet nozzle (10) for use in a liquid fuel rocket engine, said nozzle forming a body of revolution having an axis (11) of revolution and a cross section which varies in diameter along said axis, and having a wall structure comprising a plurality of mutually adjacent cooling channels (12), helically extending substantially in parallel from the inlet end (13) of the nozzle to its outlet end (14), said method comprising:
- joining a plurality of the tubular channels (12) to form a first section (10a) of the outlet nozzle (10) in which the channels has an angle of helix in relation to the longitudinal axis (11) of the nozzle;
- joining a plurality of tubular channels (12) to form a second section (10b) of the outlet nozzle (10) in which the channels have opposite angles of helix in relation to the longitudinal axis of the nozzle, and joining said sections (10a, 10b) to form a composite outlet nozzle (10) having continuous cooling channels (12).
Dependencies are inferred from the claim text.