JPS57107995A - Ducted propeller - Google Patents
Ducted propellerInfo
- Publication number
- JPS57107995A JPS57107995A JP18230480A JP18230480A JPS57107995A JP S57107995 A JPS57107995 A JP S57107995A JP 18230480 A JP18230480 A JP 18230480A JP 18230480 A JP18230480 A JP 18230480A JP S57107995 A JPS57107995 A JP S57107995A
- Authority
- JP
- Japan
- Prior art keywords
- propeller
- ducts
- clearances
- circulations
- duct
- 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.)
- Pending
Links
Landscapes
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
PURPOSE: To prevent a propeller from cavity corrosion by separating a front duct from a rear one at an interval located near the end of the propeller.
CONSTITUTION: Circulations γ1, γ2 are produced around a propeller 1 so that end eddies T, V are directed toward the center axis of the propeller by water flow from clearances 5 and the inner surfaces of respective ducts 3, 4 are prevented from cavitation corrosion. Clearances between the propeller 1 and ducts 3, 4 do not matter by providing gaps 5 so that there is no danger of the contact of the propeller 1 with the inner surface of the duct and the accuracy of installation can be lightened. Further, the circulations in ducts change into γ1, γ2, while the clearances are eliminated by equalizing approximately the outer diameter of the propeller 1 to the inner diameter of the ducts 3, 4 to provide the effect of propulsion higher than conventional one.
COPYRIGHT: (C)1982,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP18230480A JPS57107995A (en) | 1980-12-23 | 1980-12-23 | Ducted propeller |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP18230480A JPS57107995A (en) | 1980-12-23 | 1980-12-23 | Ducted propeller |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS57107995A true JPS57107995A (en) | 1982-07-05 |
Family
ID=16115942
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP18230480A Pending JPS57107995A (en) | 1980-12-23 | 1980-12-23 | Ducted propeller |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS57107995A (en) |
-
1980
- 1980-12-23 JP JP18230480A patent/JPS57107995A/en active Pending
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