CN102865187A - Novel fluid accelerator - Google Patents

Novel fluid accelerator Download PDF

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Publication number
CN102865187A
CN102865187A CN201210305819XA CN201210305819A CN102865187A CN 102865187 A CN102865187 A CN 102865187A CN 201210305819X A CN201210305819X A CN 201210305819XA CN 201210305819 A CN201210305819 A CN 201210305819A CN 102865187 A CN102865187 A CN 102865187A
Authority
CN
China
Prior art keywords
cylindrical shell
barrel
baffle plate
outlet
novel fluid
Prior art date
Application number
CN201210305819XA
Other languages
Chinese (zh)
Inventor
张兴
刘洁
薛银春
Original Assignee
无锡中航万德风能科技有限公司
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by 无锡中航万德风能科技有限公司 filed Critical 无锡中航万德风能科技有限公司
Priority to CN201210305819XA priority Critical patent/CN102865187A/en
Publication of CN102865187A publication Critical patent/CN102865187A/en

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Classifications

    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00Energy generation through renewable energy sources
    • Y02E10/20Hydro energy
    • Y02E10/22Conventional, e.g. with dams, turbines and waterwheels
    • Y02E10/223Turbines or waterwheels, e.g. details of the rotor
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00Energy generation through renewable energy sources
    • Y02E10/70Wind energy
    • Y02E10/72Wind turbines with rotation axis in wind direction

Abstract

The invention relates to a novel fluid accelerator, which comprises a barrel with a gradually extensive sectional area, a baffle arranged on an outlet of the barrel, and a curved surface gradually reduced at an inlet of the barrel, wherein the baffle at the outlet of the barrel is connected to the outlet of the barrel, a wind wheel or an impeller is close to the inlet of the barrel, and a flow rate direction of the wind wheel or impeller is from left to right. The novel fluid accelerator is characterized in that an inclined angle between the baffle at the outlet of the barrel and an axis of the barrel is 5-89 degrees. The wall surface of the barrel is linear or curved, so that the suction effect is enhanced. According to the invention, the air or the water flow speed can be improved, so that the electric energy production of a wind turbine or a water turbine under the same flow speed is increased; the wind turbine or the water turbine can automatically align to the incoming flow direction; and the load suffered by each part of the wind turbine or the water turbine is reduced, so that the integrated service life of the wind turbine or the water turbine is prolonged.

Description

A kind of novel fluid accelerating unit

Technical field

The present invention relates to a kind of novel fluid accelerating unit, belong to wind-power electricity generation and generating power by water current technical field.

Background technique

Energy problem is closely bound up with human existence.Because the fossil fuel that the earth stores is day by day depleted, and the environmental problem that causes of a large amount of combustion of fossil fuel, people begin to explore the utilization of renewable and clean energy resource, such as water energy, solar energy, wind energy etc.Utilizing wind energy conversion system or water turbine to generate electricity is the common mode of renewable energy utilization.According to fluid mechanics knowledge, the generated output of wind energy conversion system or water turbine is directly proportional with swept area, is directly proportional with the cube of flow velocity.The diameter that increases wind wheel or impeller is conducive to improve generated output, but considers the reasons such as manufacture difficulty, component requirement of strength, and diameter can not be excessive.If utilize special device to improve the speed of fluid, generated output is increased greatly.At present existing patent adopts the method for " gathering " wind energy or water energy, improves generated output by increasing liquid speed.Chinese patent CN2215606Y(is December 20 nineteen ninety-five on date openly) a kind of " concentrated fluid type electricity generating device " proposed, utilize and shrink first the kinetic energy that the sandwich structure of expanding is afterwards assembled fluid, and improve the cumulative effect in the extending section perforate.Chinese patent CN101363414A(is February 11 2009 date openly) adopt dividing plate formation negative throat noz(zle) to make the fluid speedup.Chinese patent CN201263456U(is September 7 2011 date openly) the shrinkage expansion runner is proposed, wind mill wind wheel or turbine impeller are installed on the throat of speed maximum.

Although existing patent can improve liquid speed, mostly device is complicated, and volume even greater than wind wheel or impeller has increased manufacture difficulty, is not easy to engineering and uses.In addition, these fluid speed increasing devices have also increased wind energy conversion system or the load of water turbine on flow direction, the tilting moment of supporting structure and the stress of component are increased, so the thickness of supporting structure and component must increase to satisfy requirement of strength.This is not only bad for the lightweight of wind energy conversion system or water turbine integral body, and has increased manufacture cost.

Summary of the invention

The object of the invention is to overcome above-mentioned deficiency, a kind of novel fluid accelerating unit is provided, this fluid accelerating unit not only can be realized good speedup effect, improves the generated output with uniform flow apparatus for lower wind machine or water turbine, and can reduce the load of whole device on the flow velocity direction.

According to technological scheme provided by the invention, a kind of novel fluid accelerating unit comprises cylindrical shell, the baffle plate of cylindrical shell outlet and the curved surface of cylindrical shell ingress convergent that a sectional area enlarges gradually, the baffle plate in described cylindrical shell outlet port is connected to the outlet port of cylindrical shell, wind wheel or impeller are placed near the cylindrical shell entrance, the flow velocity direction is for from left to right, and feature is: the baffle plate of described cylindrical shell outlet and the angle of tubular axis ФIt is 5 ° ~ 89 °.

As a further improvement on the present invention, described preferred version is that the baffle plate of described cylindrical shell outlet and the angle Φ of tubular axis are 50 ° or 30 °.

As a further improvement on the present invention, described cylindrical shell wall is made straight line type or is made curvilinerar figure, with the reinforced suction effect.

As a further improvement on the present invention, described cylindrical shell is gradually expansion type, and less left side, cross section is fluid input, and larger right side, cross section is fluid output.

Compared with the prior art the present invention has the following advantages:

1, improves air or water velocity, thereby increase the generated energy with uniform flow apparatus for lower wind machine or water turbine;

2, wind energy conversion system or water turbine can come flow path direction by auto-alignment;

3, within the specific limits, the angle of baffle plate and tubular axis is less, and the load of this device on flowing to is lower, and the speedup effect can not descend simultaneously;

4, aforesaid reason, the localized stress of baffle plate and cylindrical shell joint can reduce, and this device thickness is descended, and realizes the lightweight of wind energy conversion system or water turbine integral body;

5, load descends, and the load that each component of wind energy conversion system or water turbine are subject to also can descend, and is conducive to increase the life-span of wind energy conversion system or water turbine integral body.

Description of drawings

Fig. 1 is project organization schematic diagram of the present invention.

Fig. 2 baffle plate and tubular axis angle Φ are 50 ° pressure contour.

Fig. 3 baffle plate and tubular axis angle Φ are 50 ° contoured velocity.

Fig. 4 baffle plate and tubular axis angle are 30 ° pressure contour.

Fig. 5 baffle plate and tubular axis angle are 30 ° contoured velocity.

Embodiment

Following the present invention is further described in connection with the embodiment in the accompanying drawing:

As shown in Figure 1, a kind of novel fluid accelerating unit comprises the cylindrical shell 1 that a sectional area enlarges gradually, is connected to the baffle plate 2 in cylindrical shell outlet port, and the curved surface 3 of cylindrical shell ingress, and it is respectively to illustrate a little that the position 4,5 of wind mill wind wheel or turbine impeller ~ 9 is installed.

Wind wheel of the present invention or impeller are placed near cylindrical shell 1 entrance, and the flow velocity direction is for from left to right.Characteristics of the present invention are the angle of baffle plate and flow velocity direction ФIt is 5 ° ~ 89 °.

Described cylindrical shell 1 wall is made straight line type or is made curvilinerar figure, with the reinforced suction effect.

The cylindrical shell 1 that described sectional area enlarges gradually, less left side, cross section is fluid input, larger right side, cross section is fluid output.

When flow was crossed this device, because the stopping of baffle plate, 9 on the baffle plate right side in air-flow located to form low pressure area, and 7,8,9 to locate pressure lower.Because cylindrical shell increases along flow velocity direction circulation area, the inner barrel static pressure raises gradually, locates (being the cylindrical shell entrance) pressure at 6 and further reduces, and forms obvious pressure reduction with 5 of cylindrical shell upstreams.Under the effect of pressure reduction, fluid is inhaled in the cylindrical shell, and the flow velocity in the cylindrical shell is increased.

The load that this device is subject to comprises pressure and viscous force.Because the coefficient of viscosity of air or water is very low, the impact of viscous force is very little, and this device load is mainly determined by pressure.Baffle plate is met to incoming flow, is the major component of bearing pressure.Numerical experiment shows, the angle of baffle plate and flow velocity direction is less, and this device load on the flow velocity direction is lower.

Fig. 2~Fig. 5 is that fluid is near air and the speed numerical simulation result in flow field this fluid accelerating unit when being 5m/s.Wherein, Fig. 2 and Fig. 3 are that baffle plate and tubular axis angle are 50 ° pressure and contoured velocity figure; Fig. 4 and Fig. 5 are that baffle plate and tubular axis angle are 30 ° pressure and contoured velocity figure.Pressure numerical value that cloud atlas is marked is the relative pressure size, and numerical value that contoured velocity is marked is velocity magnitude.

As can be seen from the figure, the angle of the baffle plate of described cylindrical shell outlet and tubular axis is 50 ° or 30 ° of preferred versions for this.Fluid is in low pressure area on the baffle plate right side.The angle of baffle plate and tubular axis is less, and external fluid is larger in the speed in baffle plate left side, and pressure is lower, and the pressure reduction of baffle plate both sides is less.In addition, area of contour reduced when angle diminished, and this is the Another reason that whole device load descends.

The speedup effect of this device is relevant with the length on area of contour and the flow velocity direction.When baffle plate and flow velocity direction acutangulate, although area of contour decline, in the length increase of flow velocity direction, to the pumping action enhancing of air-flow.Therefore, even in the situation that area of contour descends, the speedup effect can not descend yet.

This fluid accelerating unit middle cylinder body is divided into inside and outside two-part with fluid.External fluid goes out the interruption-forming low pressure area through cylinder body outer wall and baffle plate at cylindrical shell.Because inner barrel raises gradually along flow direction pressure, locate pressure at minimum place, this device cross section (being called throat) and further reduce, with the fluid suction inner barrel of cylindrical shell upstream, thus the speed of raising cylindrical shell inner fluid.Guarantee that this device volume is less, under the better simply prerequisite of structure, cylindrical shell is longer in the length on the flow direction, larger perpendicular to the area of contour on the flow direction (hereinafter to be referred as area of contour), the speedup effect is more obvious.Because the effect of baffle plate, this device can make wind energy conversion system or water turbine auto-alignment come flow path direction.In addition, cylindrical shell can also be made curvilinerar figure except above-mentioned straight line type wall, the reinforced suction effect.

This fluid accelerating unit has improved flow velocity, and wind energy conversion system or water turbine are increased in the load that the flow velocity direction is subject to.Load is mainly relevant with cylindrical shell area of contour, baffle plate both sides pressure reduction.Outside fluid impact is to the baffle plate left side, and liquid speed descends rapidly, and a part of dynamic pressure is converted into static pressure, and baffle plate left side pressure is raise.The angle of baffle plate and tubular axis is less, and baffle plate left side pressure is lower, flows to load lower.Simultaneously, when the angle of baffle plate and tubular axis diminished, being equivalent to the length of cylindrical shell on flow direction increased, and has improved the suction capactity of cylindrical shell, although area of contour descends, the speedup effect of this fluid accelerating unit can not descend yet.

Claims (4)

1. novel fluid accelerating unit, comprise cylindrical shell (1), the baffle plate (2) of cylindrical shell outlet and the curved surface (3) of cylindrical shell ingress convergent, the baffle plate (2) in described cylindrical shell outlet port is connected to the outlet port of cylindrical shell (1), it is characterized in that: the baffle plate (2) of described cylindrical shell outlet and the angle of cylindrical shell (1) axis ФIt is 5 ° ~ 89 °.
2. a kind of novel fluid accelerating unit as claimed in claim 1 is characterized in that: the baffle plate (2) of described cylindrical shell outlet and the angle of cylindrical shell (1) axis ФIt is 50 ° or 30 °.
3. a kind of novel fluid accelerating unit as claimed in claim 1, it is characterized in that: described cylindrical shell (1) wall is made straight line type or curvilinerar figure.
4. a kind of novel fluid accelerating unit as claimed in claim 1, it is characterized in that: described cylindrical shell (1) is gradually expansion type, and cross-sectional left is fluid input, and the right side, cross section is fluid output.
CN201210305819XA 2012-08-24 2012-08-24 Novel fluid accelerator CN102865187A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201210305819XA CN102865187A (en) 2012-08-24 2012-08-24 Novel fluid accelerator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201210305819XA CN102865187A (en) 2012-08-24 2012-08-24 Novel fluid accelerator

Publications (1)

Publication Number Publication Date
CN102865187A true CN102865187A (en) 2013-01-09

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4021135A (en) * 1975-10-09 1977-05-03 Pedersen Nicholas F Wind turbine
CN1553994A (en) * 2002-03-22 2004-12-08 株式会社产学连携机构九州 Wind power generator
KR20100135058A (en) * 2009-06-16 2010-12-24 광주과학기술원 A duct type wind power generator with dual rotor
JP2011256862A (en) * 2010-05-12 2011-12-22 Enedream Co Ltd Horizontal axis type wind power generator equipped with air channel
CN202900528U (en) * 2012-08-24 2013-04-24 无锡中航万德风能科技有限公司 Novel fluid accelerator

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4021135A (en) * 1975-10-09 1977-05-03 Pedersen Nicholas F Wind turbine
CN1553994A (en) * 2002-03-22 2004-12-08 株式会社产学连携机构九州 Wind power generator
KR20100135058A (en) * 2009-06-16 2010-12-24 광주과학기술원 A duct type wind power generator with dual rotor
JP2011256862A (en) * 2010-05-12 2011-12-22 Enedream Co Ltd Horizontal axis type wind power generator equipped with air channel
CN202900528U (en) * 2012-08-24 2013-04-24 无锡中航万德风能科技有限公司 Novel fluid accelerator

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Application publication date: 20130109

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