CN107662693A - A kind of PODDED PROPULSOR with conduit - Google Patents
A kind of PODDED PROPULSOR with conduit Download PDFInfo
- Publication number
- CN107662693A CN107662693A CN201710793384.0A CN201710793384A CN107662693A CN 107662693 A CN107662693 A CN 107662693A CN 201710793384 A CN201710793384 A CN 201710793384A CN 107662693 A CN107662693 A CN 107662693A
- Authority
- CN
- China
- Prior art keywords
- conduit
- trailing edge
- podded propulsor
- propeller
- sawtooth
- 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
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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
- B63H5/14—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
- B63H5/15—Nozzles, e.g. Kort-type
-
- 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
- B63H2005/075—Arrangements on vessels of propulsion elements directly acting on water of propellers using non-azimuthing podded propulsor units, i.e. podded units without means for rotation about a vertical axis, e.g. rigidly connected to the hull
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- Ocean & Marine Engineering (AREA)
- Wind Motors (AREA)
Abstract
The present invention relates to a kind of PODDED PROPULSOR with conduit, including main link (1), auxiliary stand (2), nacelle (3), tilted supporter (4), propeller (5) and conduit (6), one end of main link (1) is welded on tilted supporter (4), the other end of main link (1) is welded on conduit (6) outer wall, center of gravity line and nacelle (3) central axis of conduit, one end of two supports up and down of auxiliary stand (2) is welded on the inwall of conduit (6), the other end is respectively welded at the top and bottom of nacelle (3), propeller (5) is installed on the rotary shaft, conduit (6) is fixed on propeller (5) outside by auxiliary stand (2), PODDED PROPULSOR is arranged on ship afterbody by tilted supporter (4), the trailing edge of conduit (6) is zigzag structure.This invention helps to reduce vibration and the noise of PODDED PROPULSOR, and the vibration and noise reducing to dual-use marine propeller provides a kind of new method.
Description
Technical field
The present invention relates to ship PODDED PROPULSOR field, more particularly to a kind of PODDED PROPULSOR with conduit.
Background technology
Iing is proposed first for PODDED PROPULSOR is the demand for being opened ice based on ship and ice formation sea situation being tackled when navigating by water.Last century 90
Age, electric propulsion are mainly used among all-around propeller and shafting propulsion system.1989, marine board of Finland was intended to
Seek to break through in ice breaker performance, increase economic efficiency, optimize operating characteristics, then ABB AB of Finland proposes Azipod
The novel concept of propeller, i.e., promoted by integrated with operation module in gondola outside hull, make the PODDED PROPULSOR freely return
Turn, so as to realize the purpose for promoting and manipulating to hull simultaneously.PODDED PROPULSOR initially mainly based on towed PODDED PROPULSOR,
In order to obtain more preferable hydrodynamic performance, excellent arrangement form, and the efficiency of lifting propeller, the species of PODDED PROPULSOR
Gradually extension has pushing-type PODDED PROPULSOR, to turning oar PODDED PROPULSOR, CRP formula PODDED PROPULSORs etc. type, wide variety
PODDED PROPULSOR make it that its application surface is more wide, the ice breaker application at initial stage has been not limited solely to, at present in large-scale person of outstanding talent
Gondola is equipped with magnificent pleasure boat, coastal ferry boat, drilling platforms and some ships higher to ship's manoeuverability requirement to promote
Device.Meanwhile it is relatively large to be mainly manifested in initial outlay there is also some shortcomings for PODDED PROPULSOR；Although PODDED PROPULSOR
Propeller incoming is more stable so that noise caused by Cavitation effect reduces, but caused noise is more in itself for motor out of my cabin
Greatly；Motor is directly exposed in water, therefore radiation feature and vibration increase；The ability of the line navigation of ship declines, it is easier to goes out
Existing big amplitude rolling etc..
In nature, cat owl does not almost have sound during gliding, and this is shape during cat owl is hunted for a long time
Into noise reduction mode.The striated structure of cat owl feather and its broached-tooth design of wing trailing edge can be reduced effectively during gliding
Caused noise.Striated structure can adjust the flowing on feather surface, reduce pressure fluctuation and vortex caused by turbulence and make an uproar
Sound.Subsequent sawtooth trailing edge technology becomes aircraft industry and applies more noise reduction technology, have been obtained for actual application and
It is proved to that there is preferable noise reduction, the technology is gradually spread in other various fields with the development of aircraft industry.
Oerlemans is transformed blower fan using sawtooth trailing edge, and improved blade can reduce the radiated noise of blower fan, reduces model
Enclose about 3~8 decibels.In observed frequency range, blower fan OA overall noise level reduces by 3.2 decibels.Moreau is to sawtooth
The flat board of trailing edge carries out wind tunnel test, and has monitored noise situations of the frequency within 10Hz, and as a result display is mounted with sawtooth tail
The flat board OA overall noise level of edge reduces by 3 decibels.
Tested on sawtooth trailing edge noise reduction, numerous studies were equally done by the country, and were applied in every field.Xu Kunbo pairs
SD2030 aerofoil profiles are transformed, and are as a result found, compared to conventional trailing edge aerofoil profile, sawtooth trailing edge aerofoil profile trailing edge flow field turbulence intensity shows
Write and reduce, aerofoil profile noise intensity is reduced, and the noise intensity of aerofoil profile leading edge locus is basically unchanged after improvement.Xu Yingbo is to broached-tooth design
Tooth root shape be improved, add rounded corners, result of the test is shown, increase chamfering after sawtooth trailing edge noise reduction increase
Add, but noise reduction increases unobvious in the case of sawtooth is less.Xue Weicheng enters sector-style to the transformation aerofoil profile under different operating modes
Hole test, compared for different Reynolds number, the different angles of attack, different teeth it is high when sawtooth trailing edge noise reduction, as a result show Reynolds number
When higher, noise reduction frequency range is bigger；When the angle of attack is larger, noise reduction reduces noise level under even component frequency and increased；One
Determine in scope, noise reduction is more preferable when the high 2h of tooth is larger.
The content of the invention
It is an object of the invention to provide a kind of PODDED PROPULSOR with conduit that can effectively reduce noise and vibration.
A kind of PODDED PROPULSOR with conduit of the present invention, including main link, auxiliary stand, nacelle, tilted supporter, spiral shell
Rotation oar and conduit, one end of main link are welded on tilted supporter, and the other end of main link is welded on conduit outer wall, conduit
Center of gravity line and nacelle central axis, one end of two supports up and down of auxiliary stand are welded on the inwall of conduit, the other end
The top and bottom of nacelle are respectively welded at, propeller is installed on the rotary shaft, and conduit is fixed on propeller by auxiliary stand
Outside, PODDED PROPULSOR is arranged on ship afterbody by tilted supporter, and the trailing edge of conduit is zigzag structure.
As a preferred embodiment of the present invention, the length-width ratio of conduit trailing edge sawtooth is 2.
As another preferred scheme of the present invention, the quantity of conduit trailing edge sawtooth is even number.
The invention helps to reduce vibration and the noise of PODDED PROPULSOR, and the vibration damping to dual-use marine propeller drops
Make an uproar and a kind of new method is provided.The advantages of conduit trailing edge is broached-tooth design：The resistance coefficient and lift coefficient of conduit decline, conduit
Stress in all directions is all reducing.Meanwhile the change in sawtooth trailing edge flow field, the pressure fluctuation of conduit is also reduced, it is right
Clearly, the exhibition of trailing vortex is reduced the overall effectiveness in vibration suppression of PODDED PROPULSOR to correlation, makes exhibition to continuous big whirlpool
It is changed into several small whirlpools, the low-frequency noise of PODDED PROPULSOR can be greatly reduced in this change in whirlpool.
Brief description of the drawings
Fig. 1 is a kind of front view of the PODDED PROPULSOR with conduit.
Fig. 2 is a kind of top view of the PODDED PROPULSOR with conduit.
Embodiment
The present invention is elaborated below in conjunction with the accompanying drawings, in figure：1 is main link, and 2 be auxiliary stand, and 3 be nacelle, 4
It is tilted supporter, 5 be propeller, and 6 be conduit.The present invention is a kind of PODDED PROPULSOR with conduit, the trailing edge structures master of conduit
If imitate the broached-tooth design design of the striated structure and its wing trailing edge of cat owl feather.
Before PODDED PROPULSOR invention design with conduit, catheter section aerofoil profile model is established first with CFD software,
Analyze common aerofoil profile and with sawtooth trailing edge aerofoil profile (different teeth are high, the facewidth and it is different in flow rate under) radiated noise, pass through contrast
Hydrofoil hydrodynamic force coefficient, pressure fluctuation and noiseproof feature before and after transformation, draw the effect of vibration and noise reduction of sawtooth trailing edge.Then it is right
It is distributed than the pressure distribution in Airfoil Flow, VELOCITY DISTRIBUTION and whirlpool, the mechanism of vibration and noise reducing is analyzed.Analysis result table
It is bright：After installing sawtooth trailing edge, resistance coefficient and the lift coefficient reduction of aerofoil profile, wherein influence of the sawtooth trailing edge to resistance coefficient are more
Greatly.Profile drag and the pulsation amplitude of lift similarly reduce, and flow velocity is higher, and the effectiveness in vibration suppression of broached-tooth design is more obvious.No
With tooth height and the sawtooth trailing edge of the facewidth all with noise effects are reduced, in computer capacity, increase tooth is high favourable with the reduction facewidth
In the radiated noise for reducing hydrofoil.After conduit trailing edge is changed into broached-tooth design, the continuous whirlpool of straight line trailing edge aerofoil profile is cut off by sawtooth, with
The gradual development in flow field, the whirlpool of aerofoil profile trailing edge diminishes and accelerates to spread.The broached-tooth design it can be seen from this change of vortex strength
The exhibition of trailing vortex is reduced to correlation, exhibition is changed into several small whirlpools to continuous big whirlpool, this change in whirlpool can be greatly reduced
The low-frequency noise of hydrofoil.
Secondly, on the basis of aerofoil profile research, using established respectively in CFD software common conduit PODDED PROPULSOR model with
Conduit has the PODDED PROPULSOR model of sawtooth trailing edge, wherein, the PODDED PROPULSOR with sawtooth trailing edge conduit is set respectively again
Length-width ratio of odd and even number sawtooth and different sawtooth etc..Respectively to the hydrodynamic force coefficient of PODDED PROPULSOR model, conduit,
The pressure and VELOCITY DISTRIBUTION of nacelle, the noiseproof feature in propeller oar card and trailing vortex distribution carry out labor, draw band
There is the conduit of sawtooth trailing edge structures, the sound pressure level of PODDED PROPULSOR oar card declines, and with the increase of advance coefficient, noise reduction
Effect is gradually reduced.Unmodified PODDED PROPULSOR is larger and circumferentially continuous in conduit trailing edge position vortex strength.Sawtooth trailing edge number is
During even number, the distribution of the supravasal pressure of PODDED PROPULSOR, VELOCITY DISTRIBUTION and conduit trailing vortex is more uniform, makes conduit and cabin
The pressure fluctuation of body weakens, and reaches the effect of vibration and noise reducing.Meanwhile in the design of this programme, by noiseproof feature and
The analysis of pressure fluctuation, the sawtooth that it is 2 for length-width ratio that discovery noise reduction is best.Conduit trailing edge should after being processed as broached-tooth design
The vortex strength in region significantly reduces, and is divided into several small whirlpools by sawtooth, and circumferentially continuous property weakens, and accelerates the diffusion in whirlpool.Together
When, reduce the impact of whirlpool and nacelle, in flow field this change of vortex strength can make the reduction of PODDED PROPULSOR eddy current crack.In addition,
The mounting means of the new PODDED PROPULSOR is identical with the mounting means of the PODDED PROPULSOR of common carrying pipe.
The catheter design of PODDED PROPULSOR advantageously reduces resistance coefficient and the lift system of conduit into the trailing edge of broached-tooth design
Number, meanwhile, the resistance of conduit and the pulsation amplitude of lift also reduce.And with the increase of the speed of a ship or plane, the new PODDED PROPULSOR
Effectiveness in vibration suppression is better.The trailing edge of conduit is broached-tooth design, and the continuous whirlpool of straight line trailing edge hydrofoil is cut off by sawtooth, with flow field by
Gradually develop, the whirlpool of hydrofoil trailing edge diminishes and accelerates to spread, and the low frequency that PODDED PROPULSOR can be greatly reduced in this change in whirlpool is made an uproar
Sound.The broached-tooth design of conduit trailing edge can reduce PODDED PROPULSOR vibration and the mechanism of noise is：Straight line trailing edge conduit is continuous
Whirlpool is cut off by sawtooth, the diffusion of broached-tooth design acceleration duct trailing vortex, is reduced the exhibition of trailing vortex to correlation, is made exhibition to continuous big whirlpool
It is changed into several small whirlpools.The frequency of noise and the yardstick in whirlpool are relevant in flow field, and this change in whirlpool can be greatly reduced gondola and push away
Enter the low-frequency noise of device.Conduit trailing edge is broached-tooth design, and the resistance coefficient and lift coefficient of conduit decline, and conduit is in all directions
On stress all reducing.Meanwhile the turbulent range on the upside of conduit trailing edge reduces, sawtooth trailing edge reduces the rapids in neighbouring flow field
Intensity of flow, this change in flow field reduce the pressure fluctuation of conduit, so that the effectiveness in vibration suppression of PODDED PROPULSOR entirety is very
Substantially.In addition, the conduit of saw-tooth-type structures can improve the vortex at conduit outflow port, gondola exciting caused by making wake flow impingement
Power substantially reduces.Different teeth are high and the sawtooth trailing edge of the facewidth all has reduction noise effects, and in allowed limits, increase tooth is high
The radiated noise of PODDED PROPULSOR, the sawtooth that it is 2 for length-width ratio that noise reduction is best are advantageously reduced with the reduction facewidth.Conduit
The sawtooth number of trailing edge is even number, and the more effect of vibration and noise reduction of quantity are better, and the sawtooth quantity of conduit trailing edge can divide a lot
Kind, the effect of vibration and noise reducing can be reached.The trailing edge of conduit carries sawtooth, can reduce the weight of PODDED PROPULSOR conduit.
PODDED PROPULSOR with sawtooth trailing edge conduit can reduce the overall vibration of propeller and noise, damping noise reduction to ship and
The Stealth Fighter tool for improving naval vessel is of great significance.
Claims (3)
1. a kind of PODDED PROPULSOR with conduit, including main link (1), auxiliary stand (2), nacelle (3), tilted supporter (4),
Propeller (5) and conduit (6), one end of main link (1) are welded on tilted supporter (4), the other end welding of main link (1)
In conduit (6) outer wall, center of gravity line and nacelle (3) central axis of conduit, one end of two supports up and down of auxiliary stand (2)
The inwall of conduit (6) is welded on, the other end is respectively welded at the top and bottom of nacelle (3), and propeller (5) is arranged on rotation
On axle, conduit (6) is fixed on propeller (5) outside by auxiliary stand (2), and PODDED PROPULSOR is arranged on ship by tilted supporter (4)
Oceangoing ship afterbody, it is characterised in that：The trailing edge of conduit (6) is zigzag structure.
A kind of 2. PODDED PROPULSOR with conduit according to claim 1, it is characterised in that：The length of conduit trailing edge sawtooth
Wide ratio is 2.
A kind of 3. PODDED PROPULSOR with conduit according to claim 1 or 2, it is characterised in that：The saw of conduit trailing edge
Number of teeth amount is even number.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710793384.0A CN107662693A (en) | 2017-09-06 | 2017-09-06 | A kind of PODDED PROPULSOR with conduit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710793384.0A CN107662693A (en) | 2017-09-06 | 2017-09-06 | A kind of PODDED PROPULSOR with conduit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107662693A true CN107662693A (en) | 2018-02-06 |
Family
ID=61098105
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710793384.0A Pending CN107662693A (en) | 2017-09-06 | 2017-09-06 | A kind of PODDED PROPULSOR with conduit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107662693A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109292068A (en) * | 2018-08-30 | 2019-02-01 | 武汉船用机械有限责任公司 | A kind of propulsion unit of full-rotating rudder screw and preparation method thereof |
| CN109895983A (en) * | 2019-03-20 | 2019-06-18 | 西北工业大学 | A kind of sawtooth trailing edge denoising structure suitable for ducted propeller |
| CN110435864A (en) * | 2018-05-04 | 2019-11-12 | 西门子股份公司 | Gondola driver |
| CN111017178A (en) * | 2019-12-27 | 2020-04-17 | 哈尔滨工程大学 | Pod type rim propeller |
| CN113183496A (en) * | 2021-01-29 | 2021-07-30 | 宜兴市新立织造有限公司 | Three-dimensional braided composite material marine catheter and preparation method thereof |
| EP4112451A1 (en) * | 2021-06-28 | 2023-01-04 | BAE SYSTEMS plc | Duct arrangement and method |
| WO2023275516A1 (en) * | 2021-06-28 | 2023-01-05 | Bae Systems Plc | Duct arrangement and method |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2606448A1 (en) * | 1976-02-18 | 1977-08-25 | Schneekluth Herbert | Ship's propeller mounted in duct - has guide vanes of varying size angle and spacing and with ring for fixing |
| CN1960909A (en) * | 2004-04-30 | 2007-05-09 | 阿尔斯托姆公司 | Marine engine assembly including a cabin mountable under a ship's hull |
| CN104271441A (en) * | 2012-06-18 | 2015-01-07 | 木浦海洋大学教产学协力团 | Silencer duct for ship's propeller using resonant barrels |
| CN204078046U (en) * | 2014-06-10 | 2015-01-07 | 安徽美吉动力科技有限公司 | A kind of power surf board Novel guide device |
| KR20150050918A (en) * | 2013-11-01 | 2015-05-11 | 삼성중공업 주식회사 | Propulsion apparatus |
| CN107117277A (en) * | 2017-04-12 | 2017-09-01 | 哈尔滨工程大学 | PODDED PROPULSOR with bionical conduit |
-
2017
- 2017-09-06 CN CN201710793384.0A patent/CN107662693A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2606448A1 (en) * | 1976-02-18 | 1977-08-25 | Schneekluth Herbert | Ship's propeller mounted in duct - has guide vanes of varying size angle and spacing and with ring for fixing |
| CN1960909A (en) * | 2004-04-30 | 2007-05-09 | 阿尔斯托姆公司 | Marine engine assembly including a cabin mountable under a ship's hull |
| CN104271441A (en) * | 2012-06-18 | 2015-01-07 | 木浦海洋大学教产学协力团 | Silencer duct for ship's propeller using resonant barrels |
| KR20150050918A (en) * | 2013-11-01 | 2015-05-11 | 삼성중공업 주식회사 | Propulsion apparatus |
| CN204078046U (en) * | 2014-06-10 | 2015-01-07 | 安徽美吉动力科技有限公司 | A kind of power surf board Novel guide device |
| CN107117277A (en) * | 2017-04-12 | 2017-09-01 | 哈尔滨工程大学 | PODDED PROPULSOR with bionical conduit |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110435864A (en) * | 2018-05-04 | 2019-11-12 | 西门子股份公司 | Gondola driver |
| CN110435864B (en) * | 2018-05-04 | 2022-08-26 | 西门子能源国际公司 | Pod drive |
| CN109292068A (en) * | 2018-08-30 | 2019-02-01 | 武汉船用机械有限责任公司 | A kind of propulsion unit of full-rotating rudder screw and preparation method thereof |
| CN109895983A (en) * | 2019-03-20 | 2019-06-18 | 西北工业大学 | A kind of sawtooth trailing edge denoising structure suitable for ducted propeller |
| CN111017178A (en) * | 2019-12-27 | 2020-04-17 | 哈尔滨工程大学 | Pod type rim propeller |
| CN113183496A (en) * | 2021-01-29 | 2021-07-30 | 宜兴市新立织造有限公司 | Three-dimensional braided composite material marine catheter and preparation method thereof |
| EP4112451A1 (en) * | 2021-06-28 | 2023-01-04 | BAE SYSTEMS plc | Duct arrangement and method |
| WO2023275516A1 (en) * | 2021-06-28 | 2023-01-05 | Bae Systems Plc | Duct arrangement and method |
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Application publication date: 20180206 |