| 摘要 |
A gas burner includes a tubular shaped housing having a proximal end and a distal end, the housing tapering inwardly to an outlet at the distal end to form a truncated cone. A gas supply tube is disposed longitudinally centrally within the housing and extends from the proximal end to a point adjacent the distal end in a combustion zone and terminates in a closed end wall, the supply tube and the housing defining therebetween an annular space for supply of air to the combustion zone at a pressure slightly above atmospheric. A vortex generator is disposed upstream of the distal end of the housing and includes a plurality of baffle flights extending longitudinally within the housing a radially from the gas supply tube to the inner wall of the housing, thereby supporting the gas supply tube. The gas supply tube defines a plurality of radially arranged openings therein disposed between the vortex generator and the closed end wall, the openings being disposed at a distance from the end wall which is one to four times the diameter of the tube. The baffle flights have an aerodynamically curved shape to produce a helical movement to air which passes therethrough and which mixes with gas exiting the openings in the gas supply tube. |
