GB1323872A - Marine propulsion system - Google Patents
Marine propulsion systemInfo
- Publication number
- GB1323872A GB1323872A GB1323872DA GB1323872A GB 1323872 A GB1323872 A GB 1323872A GB 1323872D A GB1323872D A GB 1323872DA GB 1323872 A GB1323872 A GB 1323872A
- Authority
- GB
- United Kingdom
- Prior art keywords
- duct
- water
- gas
- blades
- rotor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63H—MARINE PROPULSION OR STEERING
- B63H11/00—Marine propulsion by water jets
- B63H11/02—Marine propulsion by water jets the propulsive medium being ambient water
- B63H11/04—Marine propulsion by water jets the propulsive medium being ambient water by means of pumps
- B63H11/08—Marine propulsion by water jets the propulsive medium being ambient water by means of pumps of rotary type
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- Ocean & Marine Engineering (AREA)
- Aeration Devices For Treatment Of Activated Polluted Sludge (AREA)
Abstract
1323872 Water-jet propulsion unit MINISTRY OF DEFENCE SECRETARY OF STATE FOR 12 Jan 1971 [23 Oct 1969] 52063/69 Heading B7V A marine propulsion unit, e.g. for hydrofoil and hovercraft, comprises an annular duct 1 attached to the hull of the craft by a hollow strut 2 down which air or other gas passes into a circumferential plenum 3 from whence it passes into the duct 1 through a group of holes 4 flush with the smooth inner surface of the duct 1. Within the duct 1 is a rotor 5 having a single row of blades 6 and carried on a streamlined central hub 7 which is supported from the duet by streamlined struts 8. The gas introduced into the water flowing within the duct 1 is distributed reasonably uniformly in small bubbles over the whole cross-section to produce a homogeneous two-phase flow which acts as a compressible fluid. The shape of the after portion of the duct is such as to cause this compressible fluid to expand thereby converting the pressure head within the duct into a velocity head at the duct exit. The channels formed between the blades 6 of the rotor 5 gradually deepen radially in the downstream direction to provide some or all of the extra volume occupied by the added gas. The gradual deepening may be due to the shape of the central hub 7 (Fig. 2, not shown) and this gradual deepening may be supplemented by a step in the duct surface upstream of the holes 4 (Fig. 3, not shown). In this latter arrangement, the water flow separates from the wall to produce a free water-gas interface which breaks up and thus induces rapid mixing of the gas and water. In either case, the distribution of the gas through the water is aided by the radial pressure gradient arising from the circumferential velocity compoment of the water.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB5206369 | 1969-10-23 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1323872A true GB1323872A (en) | 1973-07-18 |
Family
ID=10462496
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1323872D Expired GB1323872A (en) | 1969-10-23 | 1969-10-23 | Marine propulsion system |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB1323872A (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1983000125A1 (en) * | 1981-06-25 | 1983-01-20 | George Branko Skrinjar | Hydrojet |
| US4929200A (en) * | 1987-11-16 | 1990-05-29 | L'etat Francais | Vessel provided with at least one water jet propulsion unit |
| DE4332358A1 (en) * | 1993-09-23 | 1995-03-30 | Nissen Jens Peter Dipl Ing | Method and device for converting the drive energies of watercraft into speed more effectively |
| US8147284B2 (en) | 2008-01-04 | 2012-04-03 | Rolls-Royce Plc | Submersible propulsor unit |
| CN109987210A (en) * | 2018-01-03 | 2019-07-09 | 上海海事大学 | A kind of bionical pump-jet propulsor |
| CN112407214A (en) * | 2020-11-23 | 2021-02-26 | 上海斯玛德大推船用螺旋桨设计有限公司 | Deep sea propeller composite material conduit |
| RU204438U1 (en) * | 2020-12-11 | 2021-05-25 | Юрий Александрович Белецкий | HIGH-PRESSURE AIR-ENERGY WATER JET TURBO ENGINE USING MICRO-DISPERSED AIR-WATER MIXTURE |
| RU207682U1 (en) * | 2021-08-02 | 2021-11-11 | Юрий Александрович Белецкий | WATER JET TURBO ENGINE |
| RU2764312C1 (en) * | 2021-09-15 | 2022-01-17 | Юрий Александрович Белецкий | Method for moving of water transport facility |
| CN114056529A (en) * | 2021-10-28 | 2022-02-18 | 西安理工大学 | Rim driving propeller with dummy shaft structure |
-
1969
- 1969-10-23 GB GB1323872D patent/GB1323872A/en not_active Expired
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1983000125A1 (en) * | 1981-06-25 | 1983-01-20 | George Branko Skrinjar | Hydrojet |
| US4929200A (en) * | 1987-11-16 | 1990-05-29 | L'etat Francais | Vessel provided with at least one water jet propulsion unit |
| DE4332358A1 (en) * | 1993-09-23 | 1995-03-30 | Nissen Jens Peter Dipl Ing | Method and device for converting the drive energies of watercraft into speed more effectively |
| US8147284B2 (en) | 2008-01-04 | 2012-04-03 | Rolls-Royce Plc | Submersible propulsor unit |
| CN109987210A (en) * | 2018-01-03 | 2019-07-09 | 上海海事大学 | A kind of bionical pump-jet propulsor |
| CN112407214A (en) * | 2020-11-23 | 2021-02-26 | 上海斯玛德大推船用螺旋桨设计有限公司 | Deep sea propeller composite material conduit |
| RU204438U1 (en) * | 2020-12-11 | 2021-05-25 | Юрий Александрович Белецкий | HIGH-PRESSURE AIR-ENERGY WATER JET TURBO ENGINE USING MICRO-DISPERSED AIR-WATER MIXTURE |
| RU207682U1 (en) * | 2021-08-02 | 2021-11-11 | Юрий Александрович Белецкий | WATER JET TURBO ENGINE |
| RU2764312C1 (en) * | 2021-09-15 | 2022-01-17 | Юрий Александрович Белецкий | Method for moving of water transport facility |
| CN114056529A (en) * | 2021-10-28 | 2022-02-18 | 西安理工大学 | Rim driving propeller with dummy shaft structure |
| CN114056529B (en) * | 2021-10-28 | 2022-09-23 | 西安理工大学 | Rim driving propeller with dummy shaft structure |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PCNP | Patent ceased through non-payment of renewal fee |