Low cost pressure atomizer
First Claim
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1. A fuel spray device comprising a body having a generally cylindrical central bore having a closed end and an open end thereof;
- a cap member mounted to the body and closing the open end of the bore to provide a swirl chamber within the body;
fluid passages defined between the body and the cap member and positioned to introduce pressurized fuel only at the open end of the bore generally tangentially into the swirl chamber to axially travel the chamber; and
an orifice extending through the cap member and communicating with the swirl chamber, the orifice being positioned generally coaxially with the swirl chamber to receive an exit fuel flow from the chamber.
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Abstract
A spray device, useful for example as a fuel nozzle for gas turbine engines, comprises a body having a bore and a cap member having an orifice, the body and cap member in combination defining a chamber. Fluid passages introduce pressurized liquid into the chamber and direct a flow into the bore, thereby causing a spinning flow to be forced out through the orifice.
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Citations
20 Claims
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1. A fuel spray device comprising a body having a generally cylindrical central bore having a closed end and an open end thereof;
- a cap member mounted to the body and closing the open end of the bore to provide a swirl chamber within the body;
fluid passages defined between the body and the cap member and positioned to introduce pressurized fuel only at the open end of the bore generally tangentially into the swirl chamber to axially travel the chamber; and
an orifice extending through the cap member and communicating with the swirl chamber, the orifice being positioned generally coaxially with the swirl chamber to receive an exit fuel flow from the chamber. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
- a cap member mounted to the body and closing the open end of the bore to provide a swirl chamber within the body;
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9. A fuel spray device for gas turbine engines, comprising:
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a substantially cylindrical body having an annular shoulder extending radially and outwardly and being axially spaced apart from a front end thereof, a substantially cylindrical bore with an open end and a closed end thereof being coaxially defined in the front end thereof; and a cap member defining a substantially cylindrical cavity extending axially from a rear open end to a closed front end thereof, the closed front end further defining an orifice axially extending therethrough and being positioned coaxially with the substantially cylindrical cavity, the cavity accommodating a front section and the annular shoulder of the body to thereby form an annular chamber between the shoulder and the closed front end, a first fluid passage being defined for introducing fuel from a pressure fuel source into the annular chamber, a second fluid passage being defined between the body and the cap member for directing a fuel flow from the annular chamber tangentially into the bore only at the open end of the bore, thereby forming the bore into a swirl chamber substantially upstream of the second fluid passage, in the swirl chamber a spinning fuel flow being subsequently redirected out through the orifice. - View Dependent Claims (10, 11, 12, 13, 14)
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- 15. A liquid spray assembly for a gas turbine engine comprising a body having a cylindrical bore with a closed end and a cap member having a central orifice extending therethrough, the body and cap member in combination defining an chamber positioned within the body generally coaxially with the orifice, the assembly including fluid passages defined between the body and the cap member for swirling introducing of fuel into the bore only at an end of the bore adjacent the cap, thereby causing a spinning fuel flow in the bore to be directed initially, axially away from the cap member and then be redirected by the closed end of the bore centrally out of the chamber through the central orifice.
Specification