Distributed erosion region rocket motor nozzle

Details Distributed erosion region rocket motor nozzle Distributed erosion region rocket motor nozzle

1994-11-18

1996-12-03

Freay, Charles G.

Power plants

Reaction motor

Condition responsive thrust varying means

60235, 60253, 60271, 102374, F02K 118

Patent

active

055796354

ABSTRACT:
A rocket motor nozzle has a nozzle core that defines a nozzle passage through which combustion products travel during flight. The erosive forces created by the combustion products are longitudinally distributed over the nozzle core so that the nozzle's smallest area remains substantially constant in spite of the erosion. An inner surface of the nozzle core defines the nozzle passage. The inner surface includes an entry region which defines a nozzle entry, an exit region which defines an exit, and an elongate erosion region which defines an erosion passage between the entry and exit. The erosion region length is greater than the average smallest passage diameter, thereby allowing the location of the erosion focus along the erosion region to vary over time as a result of erosion of the erosion region. The nozzle core is formed of a fibrous composite material which is selected according to the type of propellant used and which includes fibers oriented transverse to the erosion passage to resist erosion.

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