US3844484A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of fuel atomization and a fuel atomizer nozzle therefor
Assignee: Hitachi Ltd
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Filing: 1973-11-21
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Granted: 1974-10-29
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Expires: 1993-11-21
Abstract
Abstract A very fine fuel particle size is obtained by atomization resulting from the intersection of a fuel stream from a fuel nozzle and a gas stream from a gas nozzle with respective velocity vectors forming an angle at least as great as 90*, with atomization of an inverse Y-jet type. Preferably, the fuel is jetted with a whirling motion in an axial direction away from the atomizer, and the gas is whirled inwardly at right angles to its whirling axis or axially either in the same direction as or in the opposite direction as the axial direction of movement for the fuel. The fuel and preferably also the gas will be whirled conically, that is with both a radial and axial component of movement with respect to the whirling axis.
Inventors
- 👤 T Masai
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 05:44
CPC Classifications
F; F23; F23D; F23D11/00; F23D11/10; F23D11/106; F23D11/107
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
98 words
A fuel atomizer nozzle, comprising: a liquid fuel passage, fuel whirling means receiving fuel from said fuel passage and moving the fuel in a whirling pattern about a fuel axis; fuel nozzle means to project the whirling fuel in a conical whirling jet generally in an axial direction with respect to said fuel axis; and gas nozzle means for producing a whirling gas stream downstream of said fuel nozzle means intersecting the whirling fuel jet so that at the points of intersection the gas velocity vector generally forms an angle greater than 90* with the fuel velocity vector.
Claim 2
Dependent Claim
98 words
A fuel atomizer nozzle, comprising: a liquid fuel passage, fuel whirling means receiving fuel from said fuel passage and moving the fuel in a whirling pattern about a fuel axis; fuel nozzle means to project the whirling fuel in a conical whirling jet generally in an axial direction with respect to said fuel axis; and gas nozzle means for producing a whirling gas stream downstream of said fuel nozzle means intersecting the whirling fuel jet so that at the points of intersection the gas velocity vector generally forms an angle greater than 90* with the fuel velocity vector.
Claim 3
Dependent Claim
33 words
The fuel atomizer nozzle according to claim 1, wherein said gas nozzle means whirls the gas stream about said fuel axis with a radial component of velocity with respect to said fuel axis.
Claim 4
Dependent Claim
42 words
The fuel atomizer nozzle according to claim 1, wherein said gas nozzle means whirls the gas stream about the fuel axis and discharges the whirling gas in an axial direction corresponding to the axial direction of movement of the whirling fuel jet.
Claim 5
Dependent Claim
41 words
The fuel atomizer nozzle according to claim 1, wherein said gas nozzle means whirls the gas stream about said fuel axis and projects the whirling gas stream in an axial direction opposite to the axial direction of the whirling fuel jet.
Claim 6
Dependent Claim
138 words
A fuel atomizer nozzle, comprising: spaced inner and outer annular walls forming therebetween an annular chamber; fuel injection means opening through said inner annular wall for projecting a stream of fuel in a whirling conical path axially into said annular chamber; a fuel passage means for supplying fuel under pressure to said fuel injection means; a gas injection means having gas outlets around said outer annular wall for projecting a whirling gas stream into said annular chamber; gas passage means for supplying gas under pressure to said gas injection means; said gas injection means and said fuel injection means cooperating to intersect the projected gas stream with the projected fuel stream so that at the points of intersection, the gas velocity vector will form an angle with the fuel velocity vector within said annular cavity greater than 90*.
Claim 7
Dependent Claim
138 words
A fuel atomizer nozzle, comprising: spaced inner and outer annular walls forming therebetween an annular chamber; fuel injection means opening through said inner annular wall for projecting a stream of fuel in a whirling conical path axially into said annular chamber; a fuel passage means for supplying fuel under pressure to said fuel injection means; a gas injection means having gas outlets around said outer annular wall for projecting a whirling gas stream into said annular chamber; gas passage means for supplying gas under pressure to said gas injection means; said gas injection means and said fuel injection means cooperating to intersect the projected gas stream with the projected fuel stream so that at the points of intersection, the gas velocity vector will form an angle with the fuel velocity vector within said annular cavity greater than 90*.
Claim 8
Dependent Claim
39 words
The fuel atomizer nozzle according to claim 5, wherein said gas injection means gas outlets are each open at one end to said gas passage means and open at the other end generally tangentially to said outer annular wall.
Claim 9
Dependent Claim
28 words
The fuel atomizer nozzle according to claim 6, wherein said gas outlets are tapered in cross section from said gas passage end to said outer annular wall end.
Claim 10
Dependent Claim
41 words
The fuel atomizer nozzle according to claim 5, wherein said fuel injection means includes a plurality of fuel passages, each opening at one end to said fuel passage means and opening at the opposite end tangentially through said inner annular wall.
Claim 11
Dependent Claim
59 words
The fuel atomizer nozzle according to claim 5, wherein said fuel injection means whirls the fuel stream within said annular chamber in one rotary direction about the axis of said annular chamber and said gas injection means whirls the gas stream within said annular chamber in the opposite rotary direction, with respect to the axis of said annular chamber.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-10-28 | 1978-04-29 | 1978-10-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-10-28 | 1982-04-29 | 1982-10-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-10-28 | 1986-04-29 | 1986-10-29 | $7700.00 | Window Closed / Lapsed |