US 5,067,655 AGranted

Whirl nozzle for atomizing a liquid

AssigneeDeutsche Forschungsanstalt fuer Luft- und Raumfahrt

InventorsZoltan Farago, Tom Schork

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Abstract

A whirl nozzle for atomizing a liquid has a whirl chamber rising above a whirl chamber bottom and tapering toward a nozzle outlet orifice opposite the bottom, at least one whirl channel laterally offset to a central axis of the whirl chamber and opening into the latter, and a whirl parameter of greater than 1, so as to permit an increase in the whirl input pulse at constant or reduced whirl losses. A displacement element rises above the whirl chamber bottom to prevent the formation of an air core in the region of the floor. The element is arranged concentrically about the central axis and the external diameter of the section nearer the floor is equal to at least one diameter of the nozzle outlet orifice. In one embodiment, the conical seating surface has a smaller apex angle than a section of the whirl chamber wall adjoining the nozzle outlet orifice. In another embodiment, the displacement element is provided with at least one eccentrically arranged reflux bore.

Claims15

Dependent claims

A whirl nozzle for atomizing a liquid comprising:

a whirl chamber rising above a whirl chamber bottom and tapering towards a nozzle outlet orifice opposite said whirl chamber bottom;
an external component comprising said nozzle outlet orifice and an adjoining recess extending along a central axis and exhibiting a larger cross-section as it progresses further,
said recess having wall surfaces forming the lateral area of a conical frustum which is coaxial with said central axis,
a frustoconical internal component insertable into said recess in a positively connected manner and having said whirl chamber bottom extending perpendicularly to said central axis so that said whirl chamber bottom and said wall surfaces of said recess lying between aid whirl chamber bottom and said nozzle outlet orifice form a whirl chamber wall delimiting said whirl chamber,
said wall surfaces of said recess forming a conical seating surface for said frustoconical internal component,
said conical seating surface having a smaller apex angle than a section of said whirl chamber wall adjoining said nozzle outlet orifice,
at least one whirl channel laterally offset in relation to said central axis of said whirl chamber and opening into said whirl chamber,
a whirl parameter of >1,
a displacement element rising above said whirl chamber bottom to prevent formation of an air core in a region of said whirl chamber near said bottom,
said displacement element being arranged concentrically with said central axis,
said displacement element comprising a section near said bottom having an external diameter corresponding to at least one diameter of said nozzle outlet orifice.

8 more elements

Dependencies are inferred from the claim text.