Gaseous fuel burner with reduced velocity flame generating...

F - Mech Eng,Light,Heat,Weapons – 23 – D

Patent

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Details

F23D 14/02 (2006.01) F23D 14/06 (2006.01) F23D 14/26 (2006.01) F23D 14/58 (2006.01)

Patent

CA 2198760

A cast aluminum burner base has a tubular inlet communicating with a cavity formed in an enlarged diameter flange remote from the inlet. The cavity is closed by a cast aluminum cap registered against the base. The base and cap are each castellated along the parting line such that the castellations are interdigitated. Grooves having semi-circular cross sections and formed radially across the castellations and the spaces between and close on the parting line to form circular cross section primary primary-generating ports. The castellations on the cap are truncated and tapered to provide flame stabilizing passages adjacent alternate flame-generating ports. The grooves forming the primary flame generating ports are configured to preferably form a converging-diverging nozzle; and, the flame stabilizing passages are formed as a diverging nozzle, both for reducing flow velocity to pressurize flame separation.

Base de brûleur en aluminium moulé comportant un tube d'alimentation en communication avec une cavité aménagée dans le pourtour du brûleur, à distance de l'orifice d'alimentation. La cavité est fermée par un chapeau en aluminium moulé ajusté à la base. La base ainsi que le chapeau présentent à leur jonction des créneaux qui s'imbriquent les uns dans les autres. Des rainures radiales de section semi-circulaire pratiquées dans les créneaux et dans les intervalles qui les séparent forment, lorsque le chapeau et la base sont assemblés, des orifices circulaires permettant le passage des flammes. Les créneaux du chapeau ont une forme tronconique définissant entre les orifices circulaires des passages servant à la stabilisation des flammes. Les rainures formant les orifices de sortie des flammes définissent de préférence une buse convergente-divergente, alors que les passages de stabilisation des flammes forment une buse divergente, ce qui a pour effet à la fois de réduire la vitesse du flux de gaz et de séparer les flammes.

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