Ducted rockets

Details Ducted rockets Ducted rockets

1977-06-13

1979-01-09

Garrett, Robert E.

Power plants

Reaction motor

Method of operation

60207, 60208, 60216, 60251, 60270S, 23926519, F02K 904, F02K 710

Patent

active

041331737

ABSTRACT:
The overall efficiency of a reaction engine having primary and secondary combustion chambers is greatly improved by reducing the primary exhaust velocity to subsonic speed. This is accomplished in a preferred embodiment by using an exhaust tube downstream of the primary nozzle. A tube diameter of about six times that of the primary throat diameter and a tube length of about five to ten times that of the tube diameter is considered optimum.

REFERENCES:
patent: 3012400 (1961-12-01), Corson
patent: 3149460 (1964-09-01), La Rocca
patent: 3167912 (1965-02-01), Ledwith
patent: 3693880 (1972-09-01), Versaw
patent: 3942320 (1976-03-01), Ortwerth et al.
Schadow, K., "Study of Gas-Phase Reactions in Particle-Laden Ducted Flows", IAA Journal, vol. 11, No. 7, Jul., 1973; pp. 1042-1044.
Schadow, K., "Influence of Comb. Parameters on Combustion of Particle-Laden Fuels", AIAA Paper No. 73-177; pp. 1-12.

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