# US 10,480,472 B2 · Variable angle multi-point injection

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- Number: US 10,480,472 B2
- Document ID: US10480472B2
- Status: Granted
- Kind: B2
- Application number: 15/677,617
- Filed: 2017-08-15
- Published: 2018-01-11
- Granted: 2019-11-19
- Earliest claimed: 2012-02-16
- Assignees: Delavan Inc.
- Applicants: Delavan Inc.
- Inventors: Jason A. Ryon; Philip E. O. Buelow; John Earl Short
- Web page: https://patentgrep.com/patent/US10480472B2

## CPC

- F02M 61/162: {Means to impart a whirling motion to fuel upstream or near discharging orifices}
- F23D 11/383: {with swirl means}
- F23R 3/28: characterised by the fuel supply (burners F23D)
- F23D 2213/00: Burner manufacture specifications
- F23D 2900/11101: Pulverising gas flow impinging on fuel from pre-filming surface, e.g. lip atomizers
- F02M: SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F23D: BURNERS
- F23R: GENERATING COMBUSTION PRODUCTS OF HIGH PRESSURE OR HIGH VELOCITY, e.g. GAS-TURBINE COMBUSTION CHAMBERS (fluidised bed combustion apparatus specially adapted for operation at superatmospheric pressures F23C10/16)

## Abstract

A nozzle for injecting liquid includes a nozzle body defining a flow channel and a swirl ante-chamber in fluid communication with the flow channel. An injection point orifice is defined in the swirl ante-chamber. The flow channel feeds into the swirl ante-chamber to impart a tangential flow component on fluids entering the swirl ante-chamber to generate swirl on a spray issuing from the injection point orifice. A second flow channel can be included in fluid communication with the swirl ante-chamber. The second flow channel feeds into the swirl ante-chamber in cooperation with or in opposition to the first flow channel. The first flow channel, second flow channel, and swirl ante-chamber are configured and adapted to adjust spray angle of a spray issuing from the injection point orifice by varying flow apportionment among the first and second flow channels.

## Claims

### Claim 1

A nozzle for injecting liquid comprising:
a nozzle body defining a first flow channel and a second flow channel and a plurality of swirl ante-chambers each in fluid communication with the first flow channel, each of the plurality of swirl ante-chambers being in fluid communication with the second flow channel, with an injection point orifice defined in each swirl ante-chamber, wherein the first and second flow channels feed into the swirl ante-chambers to impart a tangential flow component on fluids entering each swirl ante-chamber to generate swirl on a spray issuing from the injection point orifices, the first flow channel, the second flow channel, and the swirl ante-chambers being configured and adapted for adjustment of spray angle on sprays issuing from the injection point orifices by varying flow apportionment among the first and second flow channels.

### Claim 2 (depends on 1)

A nozzle as recited in claim 1, wherein the swirl ante-chambers and injection point orifices are all aligned parallel to a common axis.

### Claim 3 (depends on 1)

A nozzle as recited in claim 1, wherein each swirl ante-chamber is aligned to the respective injection point orifice, and wherein the injection point orifices diverge from one another relative to a common axis.

### Claim 4 (depends on 1)

A nozzle as recited in claim 1, wherein each swirl ante-chamber is aligned to the respective injection point orifice, and wherein the injection point orifices are directed radially outward relative to a common axis.

### Claim 5 (depends on 1)

A nozzle as recited in claim 1, wherein each of the first and second flow channels is circuitous and flows back on itself.

### Claim 6 (depends on 1)

A nozzle as recited in claim 1, wherein each swirl ante-chamber feeds tangentially off the first flow channel and off the second flow channel, with the first and second flow channels each being circuitious.

### Claim 7 (depends on 1)

A nozzle as recited in claim 1, wherein the first flow channel feeds off-center into each swirl ante-chamber to impart a tangential flow component on fluids entering each swirl ante-chamber, and wherein the second flow channel feeds off-center into each swirl ante-chamber opposite the first flow channel to impart a tangential flow component on fluids entering each swirl ante-chamber.