US3554443A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Phase-resonant streaming
Assignee: Energy Sciences Inc
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Filing: 1969-04-23
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Granted: 1971-01-12
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Expires: 1989-04-23
Abstract
Abstract Boundary layer sculpted supersonic nozzle with holes thereinto of diameter such that the frequency corresponding to a wavelength equal thereto is within 20 percent of being equal to, or a multiple or submultiple of, the shock wave frequency associated with the main stream passing through the nozzle.
Inventors
- 👤 Nathaniel Hughes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 05:08
CPC Classifications
B; B05; B05B; B05B17/00; B05B17/04; B05B17/06; B05B17/0692; F; F02; F02M; F02M27/00
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
91 words
A supersonic nozzle device comprising: a boundary layer confining wall with inlet and outlet ends; a portion at said inlet end defining a nozzle inlet for receiving a subsonic stream to be given a transonic speed and to be discharged as a supersonic stream at said outlet end with shock waves having a characteristic frequency; and holes into said nozzle of diameter such that the frequency corresponding to a wave of length equal thereto is within 10 percent of being equal to, or a multiple or submultiple of, said characteristic frequency.
Claim 2
Dependent Claim
91 words
A supersonic nozzle device comprising: a boundary layer confining wall with inlet and outlet ends; a portion at said inlet end defining a nozzle inlet for receiving a subsonic stream to be given a transonic speed and to be discharged as a supersonic stream at said outlet end with shock waves having a characteristic frequency; and holes into said nozzle of diameter such that the frequency corresponding to a wave of length equal thereto is within 10 percent of being equal to, or a multiple or submultiple of, said characteristic frequency.
Claim 3
Dependent Claim
19 words
The device of claim 1 wherein said hOles include throat plane stabilization holes in said wall intermediate said ends.
Claim 4
Dependent Claim
19 words
The device of claim 1 wherein said inlet and said holes are connected to a common source of fluid.
Claim 5
Dependent Claim
49 words
The device of claim 1 wherein said portion has a ring of holes surrounding said inlet, each having a diameter such that the frequency corresponding to a wave of length equal thereto is within 10 percent of being equal to, or a multiple or submultiple of, said characteristic frequency.
Claim 6
Dependent Claim
40 words
The device of claim 1 wherein said inlet has a diameter such that the frequency corresponding to a wave of length equal thereto is within 10 percent of being equal to, or a multiple or submultiple of, said characteristic frequency.
Claim 7
Dependent Claim
43 words
The device of claim 2 wherein every orifice into said device has a diameter such that the frequency corresponding to a wave of length equal thereto is within 10 percent of being equal to, or a multiple or submultiple of, said characteristic frequency.
Claim 8
Dependent Claim
16 words
The device of claim 6 wherein said orifices include a ring of holes surrounding said inlet.
Claim 9
Independent Claim
83 words
The method of producing an enhanced shock, comprising introducing gas at the inlet of a boundary layer sculpted supersonic nozzle device, and simultaneously introducing gas at holes into said boundary layer sculpted supersonic nozzle device, and selecting the diameter of said holes so that the frequency corresponding to a wave of length equal to said diameter is within 10 percent of being equal to, or a multiple or submultiple of, the shock wave frequency associated with the main stream passing through said nozzle.
Claim 10
Independent Claim
83 words
The method of producing an enhanced shock, comprising introducing gas at the inlet of a boundary layer sculpted supersonic nozzle device, and simultaneously introducing gas at holes into said boundary layer sculpted supersonic nozzle device, and selecting the diameter of said holes so that the frequency corresponding to a wave of length equal to said diameter is within 10 percent of being equal to, or a multiple or submultiple of, the shock wave frequency associated with the main stream passing through said nozzle.
Claim 11
Dependent Claim
13 words
The method of claim 8 wherein said holes are throat plane stabilization holes.
Claim 12
Dependent Claim
58 words
The device of claim 1 mounted in a cell defining at least in part a Helmholtz resonator cavity in which said nozzle is disposed, said cavity having a depth such that the frequency of sound waves having a wavelength equal thereto is within 10 percent of being equal to, or a multiple or submultiple of, said characteristic frequency.
Claim 13
Dependent Claim
109 words
A supersonic nozzle device comprising: a boundary layer confining wall with inlet and outlet ends; and a portion at said inlet end defining a nozzle inlet for receiving a subsonic stream to be given a transonic speed and to be discharged as a supersonic stream at said outlet end with shock waves having a characteristic frequency; said nozzle being mounted in a cell to define a Helmholtz resonator cavity in which said nozzle is disposed, said cavity having a depth such that the frequency of sound waves having a wavelength equal thereto is within 10 percent of being equal to, or a multiple or submultiple of, said characteristic frequency.
Claim 14
Dependent Claim
109 words
A supersonic nozzle device comprising: a boundary layer confining wall with inlet and outlet ends; and a portion at said inlet end defining a nozzle inlet for receiving a subsonic stream to be given a transonic speed and to be discharged as a supersonic stream at said outlet end with shock waves having a characteristic frequency; said nozzle being mounted in a cell to define a Helmholtz resonator cavity in which said nozzle is disposed, said cavity having a depth such that the frequency of sound waves having a wavelength equal thereto is within 10 percent of being equal to, or a multiple or submultiple of, said characteristic frequency.
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) | 1974-01-11 | 1974-07-13 | 1975-01-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-11 | 1978-07-13 | 1979-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-11 | 1982-07-13 | 1983-01-12 | $7700.00 | Window Closed / Lapsed |