Apparatus for generating high energy gaseous blast

Claim 2

Burner apparatus for burning a fuel-air mixture comprising: a. a metallic housing having at least two opposing fuel-air mixture permeable surfaces defining walls of a combustion chamber, said permeable surfaces having openings located therein to disperse combusTion of the fuel-air mixture over said surfaces, said chamber having an outlet port; b. a plenum chamber encompassing at least said permeable surfaces and exposing said outlet port to the exterior of said combustion chamber; c. means to supply the fuel-air mixture to said plenum for passage through said permeable surfaces for combustion within said metallic housing, said outlet port passing the combustion products from said housing; and, d. means for dispersing said fuel-air mixture in said plenum chamber.

Claim 3

Burner apparatus as defined in claim 1 wherein said fuel-air mixture permeable surfaces are of a sintered powder metal construction.

Claim 4

Burner apparatus as defined in claim 1 wherein said surfaces are perforated plates.

Claim 5

Burner apparatus as defined in claim 1 wherein said surfaces are rectangular.

Claim 6

Burner apparatus as defined in claim 1 wherein said surfaces are parallel and planar.

Claim 7

Burner apparatus as defined in claim 1 including a pair of end plates extending between the ends of said surfaces and a back plate extending between the sides of said surfaces opposite said outlet port, said plates and surfaces forming said metallic housing.

Claim 8

Burner apparatus as defined in claim 6 wherein said means for dispersing said fuel-air mixture is said back plate which is indented toward the inside of said metallic housing to provide a flow guide for dispersing the fuel-air mixture in said plenum.

Claim 9

Burner apparatus as defined in claim 7 wherein said indented back plate is extended sufficiently into said housing to heat the apex thereof whereby the fuel-air mixture contacting the apex is preheated prior to entering said metallic housing.

Claim 10

Burner apparatus as defined in claim 8 wherein said means for supplying fuel-air mixture includes a conduit having an aperture facing and adjacent said indented back plate.

Claim 11

Burner apparatus as defined in claim 3 wherein said perforated plates have perforations about twelve thousandths of an inch across and constituting about eight and one half per cent of the plate areas.

Claim 12

Burner apparatus as defined in claim 2 wherein said fuel-air mixture permeable surfaces exhibit sufficient resistance to flow of said fuel-air mixture through said surfaces to effect the dispersion of said fuel-air mixture in said plenum chamber.

Claim 13

Burner apparatus for burning a fuel-air mixture comprising: a. a metallic housing having at least two opposing fuel-air mixture permeable surfaces defining wall portions of a combustion chamber, said permeable surfaces having openings located therein to disperse combustion of the fuel-air mixture over said surfaces, said chamber having an outlet port to the exterior of said chamber; b. a plenum chamber encompassing at least said permeable surfaces and exposing said outlet port to the exterior of said chamber; c. a metallic nozzle communicating with said outlet port in said metallic housing; d. means to supply a fuel-air mixture to said plenum for passage through said permeable wall portions of said metallic housing for combustion within said metallic housing, said outlet port passing the combustion products from said housing and through said nozzle; and e. means for dispersing said fuel-air mixture in said plenum chamber.

Claim 14

Burner apparatus for burning a fuel-air mixture comprising: a. a metallic housing having at least two opposing fuel-air mixture permeable surfaces defining wall portions of a combustion chamber, said permeable surfaces having openings located therein to disperse combustion of the fuel-air mixture over said surfaces, said chamber having an outlet port to the exterior of said chamber; b. a plenum chamber encompassing at least said permeable surfaces and exposing said outlet port to the exterior of said chamber; c. a metallic nozzle communicating with said outlet port in said metallic housing; d. means to supply a fuel-air mixture to said plenum for passage through said permeable wall portions of said metallic housing for combustion within said metallic housing, said outlet port passing the combustion products from said housing and through said nozzle; and e. means for dispersing said fuel-air mixture in said plenum chamber.

Claim 15

Burner apparatus as defined in claim 12 wherein said nozzle includes at least two converging sides.

Claim 16

Burner apparatus as defined in claim 12 wherein said nozzle includes an outlet, said outlet having a rectangular cross section.

Claim 17

Burner apparatus as defined in claim 12 including a refractory chamber intermediate said metallic housing and said nozzle.

Claim 18

Burner apparatus as defined in claim 15 wherein said refractory chamber has a cross section normal to the flow of products therethrough conforming to the outlet port for said metallic housing.

Claim 19

The combination defined in claim 12 including cooling fins on the exterior of said nozzle.

Claim 20

Burner apparatus as defined in claim 12 including a Shroud for said nozzle to shield the surroundings of said nozzle from heat radiating therefrom.

Claim 21

Burner apparatus as defined in claim 18 wherein said shroud includes a refractory liner.

Claim 22

Burner apparatus defined in claim 19 wherein said refractory liner includes surfaces spaced from said nozzle and having converging profiles with respect to said nozzle to define ducts having outlet ports adjacent the nozzle outlet port whereby the flow of combustion products from said nozzle inspirates cooling air through said ducts and over the exterior of said nozzle.

Claim 23

Burner apparatus as defined in claim 18 including means maintaining said shroud spaced from said nozzle to define a duct for cooling fluid, and cooling fins extending from said nozzle into said duct.

Claim 24

Burner apparatus as defined in claim 18 wherein said nozzle includes an outlet having a rectangular cross section, and said shroud includes stays for mounting said nozzle to said burner to establish the position of said nozzle with respect to the axial direction of said burner while allowing expansion of said nozzle in the direction parallel to the width of its rectangular outlet and normal to the axial direction of said burner.

Claim 25

Burner apparatus for burning a fuel-air mixture comprising: a. a metallic housing having a fuel-air mixture permeable surface defining a wall portion of a combustion chamber, said chamber having an outlet port to the exterior of said chamber; b. a plenum chamber encompassing at least said permeable surface and exposing said outlet port to the exterior of said chamber; c. a metallic nozzle communicating with said outlet port in said metallic housing, said nozzle including an outlet having a rectangular cross section; d. a shroud for said nozzle to shield the surroundings of said nozzle from heat radiating therefrom, said shroud including stays for mounting said nozzle with respect to the axial direction of said burner while allowing expansion of said nozzle in the direction parallel to the width of its rectangular outlet and normal to the axial direction of said burner; and e. means to supply a fuel-air mixture to said plenum for passage through said permeable wall portion of said metallic housing for combustion within said metallic housing, said outlet port passing the combustion products from said housing and through said nozzle.

Claim 26

Burner apparatus for burning a fuel-air mixture comprising: a. a metallic housing having a fuel-air mixture permeable surface defining a wall portion of a combustion chamber, said chamber having an outlet port to the exterior of said chamber; b. a plenum chamber encompassing at least said permeable surface and exposing said outlet port to the exterior of said chamber; c. a metallic nozzle communicating with said outlet port in said metallic housing, said nozzle including an outlet having a rectangular cross section; d. a shroud for said nozzle to shield the surroundings of said nozzle from heat radiating therefrom, said shroud including stays for mounting said nozzle with respect to the axial direction of said burner while allowing expansion of said nozzle in the direction parallel to the width of its rectangular outlet and normal to the axial direction of said burner; and e. means to supply a fuel-air mixture to said plenum for passage through said permeable wall portion of said metallic housing for combustion within said metallic housing, said outlet port passing the combustion products from said housing and through said nozzle.