| 摘要 |
<P>PROBLEM TO BE SOLVED: To promote the combustion reaction, improve the combustion efficiency, and reduce the discharges of soot and dust, carbon monoxide, and nitrogen oxides by reducing the sprayed particle diameters and lowering the kinetic momentum in a combustion device that sprays liquid fuel to combust it. <P>SOLUTION: A spray nozzle has a nozzle plate 22 formed with a groove 28 and a groove 29 worked from an under surface and an upper surface of the nozzle plate 22, respectively. The two grooves crisscross to each other to form a fuel spray hole by being communicated with each other at an intersection part 30. A guide member 23 is contacted to the upstream groove 28 and disposed at a position overlapping the intersection part (fuel spray hole) 30 viewed in the discharge direction of the spray nozzle. The spray fluid (liquid fuel) is branched by the guide member 23 from the fuel flow path 21 connected to the spray nozzle, passes through the upstream groove 28, flows into the intersecting part 30, and is discharged. The spray fluid forms counter flows in the directions toward the intersection part 30 in the upstream groove 28, collide at the obtuse angles of 90° or greater, are sprayed from the intersection part 30, and form a thin fan-like liquid film 31. The liquid film 31 is split apart by the shearing force with respect to the ambient gas to become fine spray particles 32. <P>COPYRIGHT: (C)2012,JPO&INPIT |
