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GAS GENERATOR WITH COOLANT EXPULSION MEANS

  • US 3,813,007 A
  • Filed: 12/10/1971
  • Issued: 05/28/1974
  • Est. Priority Date: 12/11/1970
  • Status: Expired due to Term
First Claim
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1. A device for effecting, in a very short time, a large release of cooled gases obtained by combustion of a propellant and cooling of the combustion gases to a moderate temperature by vaporisation of a liquid, said device comprising a hollow body made from a pressurE-resistant material, the interior of which is divided by a wall into two separate chambers, said wall preventing fluid flow between said chambers, one of said chambers being a reservoir chamber containing a vaporisable liquid and the other of said chambers being a combustion chamber containing a solid propellant, an ignition device for said propellant in said combustion chamber, means forming a gas-liquid mixing chamber adjacent said two chambers, first orifice means in the wall of said reservoir chamber and extending from said reservoir chamber to said mixing chamber, second orifice means extending from said combustion chamber to said mixing chamber to permit the flow of combustion gases from said combustion chamber directly into said mixing chamber, said second orifice means being in a direction perpendicular to the flow of gases before the gases enter therein and also perpendicular to the flow of liquid, said liquid and said gases traveling perpendicularly and forming an eddy flow within the mixing chamber, said wall which separates the two chambers comprising at least one movable portion which is movable by the gases in said combustion chamber to bring about a decrease in volume of the reservoir chamber under the action of the pressure of gases resulting from the combustion of said propellant in order to expel the liquid from said reservoir chamber through said orifice means in the wall thereof into said mixing chamber, whereby upon ignition of said propellant, combustion gases and said liquid separately flow into said mixing chamber and mixing of the combustion gases of the propellant with the liquid expelled from the reservoir and vaporisation of the said liquid in contact with the said gases causes instantaneous cooling of said gases.

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