Apparatus for after-burning fuel rich rocket exhaust products

Details Apparatus for after-burning fuel rich rocket exhaust products Apparatus for after-burning fuel rich rocket exhaust products

1999-06-11

2000-08-15

Ferensic, Denise L.

Furnaces

Refuse incinerator

For explosive or radioactive material

588202, 239431, 239434, 23926517, 23926511, 239DIG7, F23G 700, B05B 704, B63H 2546

Patent

active

061019577

ABSTRACT:
An apparatus for the disposal of solid rocket motors which produce exhaust ases containing flammable and/or explosive products. The solid rocket motor to be burned is first detachably connected to and inserted in one end of an elongated mixing chamber which has, at an opposite end, a multi-step expansion nozzle. The rocket motor is then ignited and the exhaust gas is passed into the mixing chamber, which is sufficiently large to reduce the velocity of exhaust gases from supersonic to subsonic. Air is injected into the mixing chamber to react with flammable and/or explosive products in the exhaust gases and the resultant mixture is then discharged from the mixing chamber through a multi-step expansion nozzle to expand the gaseous mixture and, at the same time, produce substantial turbulence within the gas mixture which is about six times higher than the turbulence levels produced by a constant area circular nozzle. The expansion nozzle has an inner wall with a stair-step shaped surface, having an aspect ratio of not less than 2 and not greater than 10, to create the increased turbulence levels within the multistep nozzle.

REFERENCES:
patent: 2496351 (1950-02-01), Mazzoni
patent: 4389979 (1983-06-01), Saxlund
patent: 5458071 (1995-10-01), Tadmor et al.
patent: 5725614 (1998-03-01), Hirayama et al.
patent: 5836258 (1998-11-01), Ruegg et al.

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