Variable geometry ramjet engine

Details Variable geometry ramjet engine Variable geometry ramjet engine

1968-08-19

1976-08-17

Feinberg, Samuel

Power plants

Reaction motor

Method of operation

60270R, 137 152, F02K 708

Patent

active

039746488

ABSTRACT:
A variable-geometry ramjet engine, capable of operation over the Mach 3 to 12 speed range, is provided by disposing a movable cowl around a centerbody. The engine is axisymmetric and features a translatable cowl which slides relative to the centerbody on circumferentially spaced radially extending support struts. Forward translation of the cowl provides a variable inlet area resulting in higher compression at the high Mach numbers than is possible with a fixed-geometry configuration. Rearward cowl translation increases the combustor length and combustor area ratio at the low flight Mach numbers to improve low-speed combustion characteristics. Cowl translation changes the nozzle area ratio to provide a large expansion ratio at high flight speeds and a low expansion ratio at the low flight speeds.

REFERENCES:
patent: 2540594 (1951-02-01), Price
patent: 2684570 (1954-07-01), Nordfors
patent: 3363421 (1968-01-01), Ferri

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