| 摘要 |
<p>The present invention reduces the diameter and lowers the kinetic momentum of sprayed particles in a combustion device that sprays and combusts a liquid fuel, and thus promotes the combustion reaction, improves the combustion efficiency, and reduces the discharge of soot and dust, carbon monoxide, and nitrogen oxides. Grooves (28), (29) are respectively provided in the upper and lower surfaces of a spray nozzle, and the two grooves form a cross shape and connect at an intersecting part (30) to form a fuel spray hole. A guide member (23) makes contact with the upstream-side groove (28) and is provided at a position overlapping the intersecting part (the fuel spray hole) (30) with respect to the discharge direction of the spray nozzle. The sprayed fluid (the liquid fuel) from the fuel flow path (21) that is connected to the spray nozzle is split by the guide member (23), passes through the upstream-side groove (28), and flows into and is discharged from the intersecting part (30). The sprayed fluid forms opposing flows which approach the intersecting part (30) in the upstream-side groove (28), form obtuse angles of 90° or greater and collide, and are sprayed from the intersecting part (30) to form a thin, fan-like liquid film (31). The liquid film is split apart by the shearing force with respect to the ambient gas and is reduced in size, forming spray particles (32).</p> |
