NO127962B - - Google Patents
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- Publication number
- NO127962B NO127962B NO02274/70A NO227470A NO127962B NO 127962 B NO127962 B NO 127962B NO 02274/70 A NO02274/70 A NO 02274/70A NO 227470 A NO227470 A NO 227470A NO 127962 B NO127962 B NO 127962B
- Authority
- NO
- Norway
- Prior art keywords
- propeller
- nozzle
- profile
- axial
- propeller nozzle
- Prior art date
Links
- 230000004323 axial length Effects 0.000 claims description 2
- 230000000694 effects Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63H—MARINE PROPULSION OR STEERING
- B63H5/00—Arrangements on vessels of propulsion elements directly acting on water
- B63H5/07—Arrangements on vessels of propulsion elements directly acting on water of propellers
- B63H5/16—Arrangements on vessels of propulsion elements directly acting on water of propellers characterised by being mounted in recesses; with stationary water-guiding elements; Means to prevent fouling of the propeller, e.g. guards, cages or screens
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63H—MARINE PROPULSION OR STEERING
- B63H5/00—Arrangements on vessels of propulsion elements directly acting on water
- B63H5/07—Arrangements on vessels of propulsion elements directly acting on water of propellers
- B63H5/14—Arrangements on vessels of propulsion elements directly acting on water of propellers characterised by being mounted in non-rotating ducts or rings, e.g. adjustable for steering purpose
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64C—AEROPLANES; HELICOPTERS
- B64C11/00—Propellers, e.g. of ducted type; Features common to propellers and rotors for rotorcraft
- B64C11/001—Shrouded propellers
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- Ocean & Marine Engineering (AREA)
- Aviation & Aerospace Engineering (AREA)
- Nozzles (AREA)
- Toys (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
- Physical Or Chemical Processes And Apparatus (AREA)
- Glass Compositions (AREA)
- Turbine Rotor Nozzle Sealing (AREA)
- Aerodynamic Tests, Hydrodynamic Tests, Wind Tunnels, And Water Tanks (AREA)
Description
Propelldyse. Propeller nozzle.
Fremdriftsanordninger for skip med propeller under anvendel-se av dyser som omslutter propellene er kjent. Det er også kjent å utforme og anordne propelldysen slik i forhold til propellen at propellen vil komme til å arbeide på det sted hvor propelldysen har sitt minste gjennomstrømningstverrsnitt, og hår en ganske liten klaring med propellbladsirkelen. Dessuten er propelldysen utformet slik at gjen-nomstrømningstverrsnittet bak propellen forandrer ség ganske lite el-ler slett ikke, mens gjennomstrømningstverrsnittét foran propellen øker i retning forover.. Det er også kjent å utforme propelldyseinn-løpsåpningens inngangskant avrundet med stor radius. Hensikten med bruk av propelldyser er å bedre propulsjonsvirkningsgraden. I regelen har propelldyser vært rotasjonssymmetriske og har vært beregnet etter middelverdier for medstrømmen. Medstrømmen i propellsonen er imidlertid, særlig ved skip med større fyldighets-grad, som tilfellet er med de f leste. større tank/bulkskip., .ikke rota-sjons symmetrisk. Propulsion devices for ships with propellers using nozzles that surround the propellers are known. It is also known to design and arrange the propeller nozzle in such a way in relation to the propeller that the propeller will come to work at the place where the propeller nozzle has its smallest flow cross-section, and hair a fairly small clearance with the propeller blade circle. Furthermore, the propeller nozzle is designed so that the flow-through cross-section behind the propeller changes quite little or not at all, while the flow-through cross-section in front of the propeller increases in the forward direction. It is also known to design the entrance edge of the propeller nozzle inlet opening rounded with a large radius. The purpose of using propeller nozzles is to improve propulsion efficiency. As a rule, propeller nozzles have been rotationally symmetrical and have been calculated according to mean values for the co-flow. The co-flow in the propeller zone is, however, especially with ships with a greater degree of fullness, as is the case with most of them. larger tank/bulk ship., .not rotationally symmetrical.
Oppfinnelsen tar utgangspunkt i denne erkjennelse og ifølge oppfinnelsen foreslås det en propelldy.se. hvor dyseprofilens geometri varierer. Med en slik propelldyse kan man forandre medstrømmen.i propellsonen til et felt av mer rotasjonssymmetrisk natur, slik at hvert propellbladsnitt "ser" et mer ensartet medstrømsbilde under propellens rotasjon. The invention is based on this realization and according to the invention a propeller nozzle is proposed. where the geometry of the nozzle profile varies. With such a propeller nozzle, one can change the co-flow in the propeller zone to a field of a more rotationally symmetrical nature, so that each propeller blade section "sees" a more uniform co-flow picture during the propeller's rotation.
Ifølge oppfinnelsen er det derfor tilveiebragt en propelldyse med de radiale og aksiale snitt varierende arealer av de i aksiale snitt strømlinjeformede snittflater igjennom dysens<x>vegg, og det som kjennetegner propelldysen er at snittflatenes arealer er endret trinnvis i aksiale trinn rundt dysens utvendige overflate ved at veggens radiale tykkelser er forskjellige fra trinn til trinn, og-at de enkelte trinns aksiale lengde er forskjellig, idet dysens forkant er gitt en avtrappet form.. According to the invention, a propeller nozzle is therefore provided with the radial and axial section varying areas of the axial section streamlined cut surfaces through the nozzle<x>wall, and what characterizes the propeller nozzle is that the areas of the cut surfaces are changed step by step in axial steps around the outer surface of the nozzle by that the radial wall thicknesses are different from step to step, and that the axial length of the individual steps is different, as the front edge of the nozzle is given a stepped shape..
Propelldysens geometri forøvrig avhenger av de prpfiltyper man vil anvende. Det er således mulig å gjøre en vesentlig del av propelldysen rotasjonssymmetrisk mens variasjonene i profilet blir å finne i forkant av propelldysen. Propelldysen vil kunne utføres slik at propelldysens innside aktenfor propellsonen gjøres felles for samtlige profiler. The geometry of the propeller nozzle also depends on the types of propellers you want to use. It is thus possible to make a significant part of the propeller nozzle rotationally symmetrical, while the variations in the profile will be found in front of the propeller nozzle. The propeller nozzle can be made so that the inside of the propeller nozzle aft of the propeller zone is made common to all profiles.
Profilene kan tenkes å variere både i størrelse, form og type. Por ytterligere å bedre propulsjonsvirkningsgraden kan ifølge oppfinnelsen propelldysen være forsynt med såkalte high-liftspalter foran propellsonen. High-lif tspalter. skal her " inkludere' enhver åpning gjennom profilet. Ved å anvende high-liftprofiler for propelldysen vil man kunne oppnå mere ensartet dysevirkning•rundt propelldysen. Bruk av high-liftprofiler vil-kunne gi redusert propelldyselengde med samme dyseskyvkraft. Dette profils nominelle åpningsvinkel kan' også anslagsvis økes 20 - 30% over de verdier som gjelder for vanlige profiler. The profiles can be thought of as varying in size, shape and type. In order to further improve the propulsion efficiency, according to the invention, the propeller nozzle can be provided with so-called high-lift slits in front of the propeller zone. High-life columns. shall here "include" any opening through the profile. By using high-lift profiles for the propeller nozzle, it will be possible to achieve a more uniform nozzle effect•around the propeller nozzle. The use of high-lift profiles will result in a reduced propeller nozzle length with the same nozzle thrust. This profile's nominal opening angle can' also an estimated 20 - 30% increase over the values that apply to normal profiles.
En vesentlig fordel, ved bruk av high-liftprofilet er at de gir mulighet for. en økning av grensesjikttykkelsen på propelldysens innside i propellbladtuppens bane. Det reduserer kravet til små pro- A significant advantage of using the high-lift profile is that they allow for an increase in the boundary layer thickness on the inside of the propeller nozzle in the path of the propeller blade tip. It reduces the requirement for small pro-
pellbladtuppklaringer. pell blade tip clearances.
Oppfinnelsen skal forklares nærmere under henvisning til tegningene hvor The invention shall be explained in more detail with reference to the drawings where
Fig. 1 viser en propelldyse ifølge oppfinnelsen. Fig. 1 shows a propeller nozzle according to the invention.
Fig. 2 viser propelldysen sett fra siden. Fig. 2 shows the propeller nozzle seen from the side.
Fig. 3 viser en annen propelldyse ifølge oppfinnelsen. Fig. 3 shows another propeller nozzle according to the invention.
Fig. 4 viser endel av propelldysen i Fig. 3 i utfoldet tilstand. Fig. 5 viser et delsnitt gjennom en propelldyse ifølge oppfinnelsen, med en high-liftprofil. Fig. 4 shows part of the propeller nozzle in Fig. 3 in the unfolded state. Fig. 5 shows a section through a propeller nozzle according to the invention, with a high-lift profile.
I Fig. 1 og 2 er det vist en propelldyse med en øvre dysesektor 1, i hvilken sektor det forefinnes den samme profil over hele sektoren, en nedre dysesektor 2, som også over hele sin sektor har samme profil, og en sidesektor 3 med en speilbildelig anordnet sidesektor 4. Også i disse to sidesektorer har man over hele sektoren samme profil. Profilene i de enkelte dysesektorer 1 - 4 er imidlertid innbyrdes ulike, med unntagelse av de to sidesektorer 3, 4, slik det går frem av Fig. 2. In Fig. 1 and 2, a propeller nozzle is shown with an upper nozzle sector 1, in which sector there is the same profile over the entire sector, a lower nozzle sector 2, which also has the same profile over its entire sector, and a side sector 3 with a mirror-image arranged side sector 4. Also in these two side sectors, the entire sector has the same profile. However, the profiles in the individual nozzle sectors 1 - 4 are mutually different, with the exception of the two side sectors 3, 4, as can be seen from Fig. 2.
I Fig. 2 er det dessuten med stiplede linjer 5, 6 inntegnet en indikering av profilets avrunding. In Fig. 2, an indication of the rounding of the profile is also drawn with dashed lines 5, 6.
Fig. 3 og 4 viser en annen propelldyse ifølge oppfinnelsen. I Fig. 3 er det bare vist den ene halvpart av propelldysen, idet den andre halvpart er speilbildelig symmetrisk. Som det går frem av Fig. 3, har dysen flere dysesektorer 7, 8, 9 og 10 med innbyrdes ulike profiler, slik det går frem ved et nærmere studium av Fig. 4, hvor propelldysen i Fig. 3 er vist utforldet. Fra Fig. 4 går det klart frem at dysesektoren 7 har et bestemt profil 11, mens dysesektoren 9 har et annet profil 12 og dysesektoren 10 har et tredje profil 13. Propellsonen er indikert med den stiplede linjen 16. Bak propellsonen er propelldysens innside 19 felles for samtlige profiler. Fig. 3 and 4 show another propeller nozzle according to the invention. In Fig. 3, only one half of the propeller nozzle is shown, the other half being mirror-image symmetrical. As can be seen from Fig. 3, the nozzle has several nozzle sectors 7, 8, 9 and 10 with mutually different profiles, as can be seen from a closer study of Fig. 4, where the propeller nozzle in Fig. 3 is shown unfolded. From Fig. 4 it is clear that the nozzle sector 7 has a specific profile 11, while the nozzle sector 9 has another profile 12 and the nozzle sector 10 has a third profile 13. The propeller zone is indicated by the dashed line 16. Behind the propeller zone, the inside of the propeller nozzle 19 is common for all profiles.
Med de viste propelldysetyper kan man oppnå en endring av medstrømmen i propellsonen til et felt av mer rotasjonssymmetrisk natur, med øket propulsjonsvirkningsgrad som følge av denne endring. With the propeller nozzle types shown, a change of the co-flow in the propeller zone to a field of a more rotationally symmetrical nature can be achieved, with increased propulsion efficiency as a result of this change.
Fig. 5 viser et delsnitt gjennom et profil, som kan være et profil i en av de i Fig. 1-4 viste propelldyser. Profilet 21 er forsynt med high-liftspalter 18. Profilets fremre del er forbundet med profilets bakre del ved hjelp av de antydede steg 19. High-lift-spaltene 18 er, slik det går frem av Fig. 5 anordnet foran propell- Fig. 5 shows a partial section through a profile, which can be a profile in one of the propeller nozzles shown in Figs. 1-4. The profile 21 is provided with high-lift slits 18. The front part of the profile is connected to the rear part of the profile by means of the indicated steps 19. The high-lift slits 18 are, as can be seen from Fig. 5, arranged in front of the propeller
sonen. I Fig. 5 er et propellblad betegnet med 20. the zone. In Fig. 5, a propeller blade is denoted by 20.
I Fig. 1 og 2 er det inntegnet to stiplede linjer ved profilet 4. Disse stiplede linjer indikerer eksempler på to andre utførelsesformer av profilet. I det hele tatt kan profilene varieres etter behov, slik at man får den gunstigste utførelse. In Fig. 1 and 2, two dotted lines are drawn at the profile 4. These dotted lines indicate examples of two other embodiments of the profile. In general, the profiles can be varied as needed, so that you get the most favorable design.
Claims (2)
Priority Applications (9)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NO02274/70A NO127962B (en) | 1970-06-11 | 1970-06-11 | |
US00149740A US3738307A (en) | 1970-06-11 | 1971-06-03 | Propeller nozzle |
FR7120831A FR2096098A5 (en) | 1970-06-11 | 1971-06-09 | |
SE7107466A SE378576B (en) | 1970-06-11 | 1971-06-09 | |
ES1971198440U ES198440Y (en) | 1970-06-11 | 1971-06-09 | A PROPELLER NOZZLE ARRANGEMENT. |
GB1984271*[A GB1310803A (en) | 1970-06-11 | 1971-06-10 | Propeller nozzle |
FI711636A FI52052C (en) | 1970-06-11 | 1971-06-10 | Propeller nozzle. |
NL7108071A NL7108071A (en) | 1970-06-11 | 1971-06-11 | |
DE19712129068 DE2129068A1 (en) | 1970-06-11 | 1971-06-11 | Propeller nozzle, in particular for ships |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NO02274/70A NO127962B (en) | 1970-06-11 | 1970-06-11 |
Publications (1)
Publication Number | Publication Date |
---|---|
NO127962B true NO127962B (en) | 1973-09-10 |
Family
ID=19878743
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
NO02274/70A NO127962B (en) | 1970-06-11 | 1970-06-11 |
Country Status (9)
Country | Link |
---|---|
US (1) | US3738307A (en) |
DE (1) | DE2129068A1 (en) |
ES (1) | ES198440Y (en) |
FI (1) | FI52052C (en) |
FR (1) | FR2096098A5 (en) |
GB (1) | GB1310803A (en) |
NL (1) | NL7108071A (en) |
NO (1) | NO127962B (en) |
SE (1) | SE378576B (en) |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CA1270700A (en) * | 1986-03-27 | 1990-06-26 | Hans Bjorkestam | Shrouded propeller |
US5292088A (en) * | 1989-10-10 | 1994-03-08 | Lemont Harold E | Propulsive thrust ring system |
US5474419A (en) * | 1992-12-30 | 1995-12-12 | Reluzco; George | Flowpath assembly for a turbine diaphragm and methods of manufacture |
US5393197A (en) * | 1993-11-09 | 1995-02-28 | Lemont Aircraft Corporation | Propulsive thrust ring system |
US5586864A (en) * | 1994-07-27 | 1996-12-24 | General Electric Company | Turbine nozzle diaphragm and method of assembly |
US6595753B1 (en) * | 1999-05-21 | 2003-07-22 | A. Vortex Holding Company | Vortex attractor |
DE202007016163U1 (en) * | 2007-11-16 | 2008-01-24 | Becker Marine Systems Gmbh & Co. Kg | Kort nozzle |
ES2317799B1 (en) * | 2008-08-01 | 2010-03-17 | Juan Jose Romero Vazquez | PROPULSION SYSTEM WITH HELICE AND FIXED TOWER REGARDING HELICE. |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3455268A (en) * | 1966-10-13 | 1969-07-15 | Samuel J Gordon | Nonsymmetric shroud-propeller combination for directional control |
-
1970
- 1970-06-11 NO NO02274/70A patent/NO127962B/no unknown
-
1971
- 1971-06-03 US US00149740A patent/US3738307A/en not_active Expired - Lifetime
- 1971-06-09 ES ES1971198440U patent/ES198440Y/en not_active Expired
- 1971-06-09 SE SE7107466A patent/SE378576B/xx unknown
- 1971-06-09 FR FR7120831A patent/FR2096098A5/fr not_active Expired
- 1971-06-10 FI FI711636A patent/FI52052C/en active
- 1971-06-10 GB GB1984271*[A patent/GB1310803A/en not_active Expired
- 1971-06-11 DE DE19712129068 patent/DE2129068A1/en active Pending
- 1971-06-11 NL NL7108071A patent/NL7108071A/xx unknown
Also Published As
Publication number | Publication date |
---|---|
ES198440Y (en) | 1975-10-16 |
GB1310803A (en) | 1973-03-21 |
FR2096098A5 (en) | 1972-02-11 |
FI52052C (en) | 1977-06-10 |
FI52052B (en) | 1977-02-28 |
DE2129068A1 (en) | 1972-01-13 |
US3738307A (en) | 1973-06-12 |
NL7108071A (en) | 1971-12-14 |
ES198440U (en) | 1975-06-16 |
SE378576B (en) | 1975-09-08 |
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