CN110107534A - A kind of blade surface notching construction of structure parameterization - Google Patents
A kind of blade surface notching construction of structure parameterization Download PDFInfo
- Publication number
- CN110107534A CN110107534A CN201910485363.1A CN201910485363A CN110107534A CN 110107534 A CN110107534 A CN 110107534A CN 201910485363 A CN201910485363 A CN 201910485363A CN 110107534 A CN110107534 A CN 110107534A
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- CN
- China
- Prior art keywords
- blade
- notching construction
- leaf
- impeller
- centrifugal fan
- 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.)
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/26—Rotors specially for elastic fluids
- F04D29/28—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps
- F04D29/30—Vanes
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- F05D2240/00—Components
- F05D2240/20—Rotors
- F05D2240/30—Characteristics of rotor blades, i.e. of any element transforming dynamic fluid energy to or from rotational energy and being attached to a rotor
- F05D2240/305—Characteristics of rotor blades, i.e. of any element transforming dynamic fluid energy to or from rotational energy and being attached to a rotor related to the pressure side of a rotor blade
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- F05D2240/00—Components
- F05D2240/20—Rotors
- F05D2240/30—Characteristics of rotor blades, i.e. of any element transforming dynamic fluid energy to or from rotational energy and being attached to a rotor
- F05D2240/306—Characteristics of rotor blades, i.e. of any element transforming dynamic fluid energy to or from rotational energy and being attached to a rotor related to the suction side of a rotor blade
Abstract
The invention discloses a kind of impeller blade surface of structure parameterization flutings to design, the bleed slot of connection blade suction surface and pressure face is opened in Centrifugal Fan Impeller vane tip specific position, it forms an angle with axial, bleed slot imports and exports position and width is given value, the depth of slot is about 40% leaf height, and axially inclined 11 degree.Numerically modeling has been carried out in certain Centrifugal Fan Impeller, result of study, which shows to design using the blade surface notching construction of structure parameterization, significantly improves Centrifugal Fan Impeller flow field, reduces flow losses, the total pressure liter of centrifugal fan is increased, and improves efficiency.
Description
Technical field
The present invention relates to impeller machinery technical field, the blade surface notching construction of specifically a kind of structure parameterization is used
In the total pressure liter of raising centrifugal fan, and obtain improved efficiency.
Background technique
Centrifugal fan is widely used in because of the advantages that air quantity is larger, fan outlet total pressure is higher including steel, coal
The various fields such as mine, chemical industry, electric power, space flight.In order to reduce waste of the low performance machinery in terms of the energy, the effect of ventilation blower is improved
Rate, the performance for improving ventilation blower have great significance.Research shows that blade surface fluting measure can be improved turbomachine
Performance, by by the boundary-layer air-flow of pressure face and a part of mainstream suction tank, after accelerating in slot, to blade suction surface
Boundary-layer air-flow is blown down and is motivated, to reduce flow losses.Currently, in axial turbomachine, blade grooving techniques
It has obtained more in-depth study, but has studied in centrifugal impeller machinery less.It is most of in the research of centrifugal impeller machinery
Researcher has only carried out the research that blade surface is slotted to centrifugal impeller, does not account for the interaction between spiral case and impeller
Improve the influence of blade flow field to it；Secondly, most researchers are calculated using permanent numerical value in numerical simulation calculation, and
In permanent calculating, the relative position of spiral case and impeller is affected to calculated result.
Summary of the invention
Technical problem solved by the present invention is for overcome the deficiencies in the prior art, the present invention provides a kind of structure
The blade surface notching construction of parametrization.
The technical scheme is that a kind of blade surface notching construction of structure parameterization, which is characterized in that described to open
Slot structure is located at the top of impeller blade, and the structure can be connected to the pressure face and suction surface of impeller blade simultaneously；Groove width not phase
Together, and notching construction axis and impeller blade are axial at an angle.
A further technical solution of the present invention is: the leaf table notching construction entrance location to blade inlet edge distance be 50%
Leaf chord length, the distance of outlet port to blade inlet edge are 62% leaf chord length.
A further technical solution of the present invention is: the leaf table notching construction entrance width is 7.2% leaf chord length, outlet
Width is 7.5% leaf chord length.
A further technical solution of the present invention is: the inlet side depth and outlet side depth of the leaf table notching construction are
40% leaf is high.
A further technical solution of the present invention is: the leaf table fluting is axially inclined 11 ° along impeller.
Invention effect
The technical effects of the invention are that: while improving centrifugal fan total pressure liter, obtain a degree of efficiency
It is promoted.In order to balance leaf table notching construction and loss in efficiency, the present invention pass through to certain prototype centrifugal ventilation blower interior flow field point
Analysis, devising the leaf table notching construction of structure parameterization a kind of, (major parameter is slot in the position of pressure face and suction surface, slot
Inlet and outlet width, the axial depth of slot and axially inclined angle).It can obtain higher total pressure liter relative to prototype ventilation blower
It is promoted, and possesses positive efficiency improvement amount.By carrying out structure parameter optimizing to leaf table notching construction, devises one kind and take into account
Total pressure rises the leaf table notching construction promoted with improved efficiency.Bleed slot after structure optimization passes through the low energy stream in swabbing pressure face
Body reduces boundary layer thickness, improves the air velocity of pressure face, increases the through-current capability in channel；Meanwhile out of slot
The air-flow of outflow has certain blowing and incentive action to blade suction surface low speed flow, it is suppressed that blade suction surface boundary-layer point
From weakening the intensity of jet-wake structure, improve the flow field in blade path.It is carried out in certain Centrifugal Fan Impeller
Numerically modeling, result of study show that it is 3.4% that the total pressure that the leaf table notching construction of the structure parameterization obtains, which rises improvement,
Efficiency improvement amount is 2.44%.
Detailed description of the invention
Fig. 1 is the leaf table notching construction schematic three dimensional views of structure parameterization；
Fig. 2 is schematic diagram of the leaf table notching construction in blade suction surface of structure parameterization；
Fig. 3 is schematic diagram of the leaf table notching construction in blade pressure surface of structure parameterization；
Fig. 4 is schematic diagram of the leaf table notching construction slotting position in vane tip of structure parameterization.
In figure, 1- Centrifugal Fan Impeller blade, 2- bleed slot, 3- is axial, 4- blade suction surface, 5- bleed slot suction surface
Profile, 6- blade pressure surface, 7- bleed slot pressure facial contour, 8- blade inlet edge, 9- blade trailing edge, 10- bleed slot entrance location,
11- bleed slot outlet port, α-axial deflection angle, H1Bleed slot import axial depth, H2Bleed slot exports axial depth.
Specific embodiment
Referring to Fig. 1-Fig. 4, a kind of blade surface fluting design of structure parameterization, the specific position at the top of impeller blade
Open the slot of connection pressure face and suction surface, the inlet and outlet of slot have different width, make slot be connected to a certain range of suction surface with
Pressure face；Slot has certain axial depth；Bleed slot tilts at an angle along axial direction.The Ye Biaokai of the structure parameter optimizing
It is 3.4% that the total pressure that slot structure obtains, which rises improvement, and efficiency improvement amount is 2.44%.
In the present embodiment, the leaf table notching construction entrance location to blade inlet edge distance is 62.1mm, and outlet port is arrived
The distance of blade inlet edge is 76.4mm.The leaf table notching construction entrance width is 8.9mm, exit width 9.2mm.The leaf
The inlet side depth of table notching construction is 48.5mm, and outlet side depth is 47.5mm.The leaf table fluting is axially inclined along impeller
11°。
Specific embodiments of the present invention include the following steps:
Step 1: the slot of a connection pressure face and suction surface is opened on fan impeller blade, arrives the entrance location of slot
Blade inlet edge distance is 62.1mm, and the distance of outlet port to blade inlet edge is 76.4mm.
Step 2: slot structure entrance width is 7.2% leaf chord length, and exit width is 7.5% leaf chord length.
Step 3: the depth of slot is about 40% blade height (apart from wheel cap), and wherein inlet side depth is 48.5mm, outlet
Side depth is 47.5mm.
Step 4: keep bleed slot whole along vane tip, tilt 11 ° towards impeller outlet direction.
The present invention applies on certain centrifugal compressor impeller blade, and the major parameter of the centrifugal fan is as shown in table 1.
1 centrifugal fan dimensional parameters of table
Carried out on certain centrifugal compressor impeller blade prototype centrifugal ventilation blower and with above-mentioned leaf table notching construction from
The unsteady numerical simulations of heart ventilation blower are studied, and specific implementation process is as follows:
1, structured grid division is carried out to centrifugal fan and bleed slot using NUMECA software；
2, full three-dimensional non-steady numerical value being carried out using NUMECA FINE/Turbo software to calculate, relative parameters setting is, from
The revolving speed of heart fan impeller is 2920r/min, is solved under relative coordinate system using k-epsilon turbulence model equal when Reynolds
N-S equation；When permanent calculating, time discrete uses explicit quadravalence Runge-Kutta time-marching method, and spatial spreading uses two
Rank upwind TVD scheme；Implicit dual time-stepping method is utilized when unsteady computation, physical time step is set in a rotor blade passage
240 are set to, the virtual time step under each physical time step is set as 20.
3, data processing is carried out according to numerical result, obtains prototype ventilation blower and with above-mentioned leaf table notching construction
The total pressure of centrifugal fan rises and efficiency, and the centrifugal fan for obtaining band structure and parameterizing leaf table notching construction is calculated by formula
Total pressure rise improvement and efficiency improvement amount.
Result of study shows that it is respectively 3.4% that the total pressure that the leaf table fluting of the structure parameterization obtains, which rises improvement, efficiency
Improvement is 2.44%.This illustrates the centrifugal fan of band structure parametrization leaf table notching construction compared with prototype centrifugal ventilation blower
Higher total pressure liter can be obtained, and whole efficiency has obtained positive promotion.
Claims (5)
1. a kind of blade surface notching construction of structure parameterization, which is characterized in that the notching construction is located at impeller blade top
Portion, and the structure can be connected to the pressure face and suction surface of impeller blade simultaneously；Groove width is not identical, and notching construction axis and leaf
Impeller blade is axial at an angle.
2. a kind of structural parameters blade surface notching construction as described in claim 1, which is characterized in that the leaf table fluting knot
Structure entrance location is 50% leaf chord length to blade inlet edge distance, and the distance of outlet port to blade inlet edge is 62% chord of blade
It is long.
3. a kind of structural parameters blade surface notching construction as described in claim 1, which is characterized in that the leaf table fluting knot
Structure entrance width is 7.2% leaf chord length, and exit width is 7.5% leaf chord length.
4. a kind of structural parameters blade surface notching construction as described in claim 1, which is characterized in that the leaf table fluting knot
The inlet side depth and outlet side depth of structure are 40% leaf height.
5. a kind of structural parameters blade surface notching construction as described in claim 1, which is characterized in that leaf table fluting edge
Axially inclined 11 ° of impeller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910485363.1A CN110107534A (en) | 2019-06-05 | 2019-06-05 | A kind of blade surface notching construction of structure parameterization |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910485363.1A CN110107534A (en) | 2019-06-05 | 2019-06-05 | A kind of blade surface notching construction of structure parameterization |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110107534A true CN110107534A (en) | 2019-08-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910485363.1A Pending CN110107534A (en) | 2019-06-05 | 2019-06-05 | A kind of blade surface notching construction of structure parameterization |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1331463A (en) * | 1969-09-12 | 1973-09-26 | Cabot Corp | Blades for use for example in fans turbines or pumps |
| JPH08284889A (en) * | 1995-04-13 | 1996-10-29 | Matsushita Electric Ind Co Ltd | Blower impeller |
| JPH0979187A (en) * | 1995-09-13 | 1997-03-25 | Matsushita Electric Ind Co Ltd | Axial flow air blower impeller |
| DE102008041769A1 (en) * | 2007-09-03 | 2009-03-05 | Denso Corporation, Kariya | Impeller, fuel pump with the impeller and fuel supply unit with the fuel pump |
| CN102645122A (en) * | 2012-05-18 | 2012-08-22 | 北京化工大学 | Grooving spiral curling rotor in heat exchange tube |
| CN107061357A (en) * | 2017-01-20 | 2017-08-18 | 美的集团股份有限公司 | Blade, centrifugal blower fan blade wheel, centrifugal blower and range hood |
| CN207961056U (en) * | 2018-02-05 | 2018-10-12 | 潍坊市天源环保科技有限公司 | A kind of air floatation machine gas distribution impeller |
-
2019
- 2019-06-05 CN CN201910485363.1A patent/CN110107534A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1331463A (en) * | 1969-09-12 | 1973-09-26 | Cabot Corp | Blades for use for example in fans turbines or pumps |
| JPH08284889A (en) * | 1995-04-13 | 1996-10-29 | Matsushita Electric Ind Co Ltd | Blower impeller |
| JPH0979187A (en) * | 1995-09-13 | 1997-03-25 | Matsushita Electric Ind Co Ltd | Axial flow air blower impeller |
| DE102008041769A1 (en) * | 2007-09-03 | 2009-03-05 | Denso Corporation, Kariya | Impeller, fuel pump with the impeller and fuel supply unit with the fuel pump |
| CN102645122A (en) * | 2012-05-18 | 2012-08-22 | 北京化工大学 | Grooving spiral curling rotor in heat exchange tube |
| CN107061357A (en) * | 2017-01-20 | 2017-08-18 | 美的集团股份有限公司 | Blade, centrifugal blower fan blade wheel, centrifugal blower and range hood |
| CN207961056U (en) * | 2018-02-05 | 2018-10-12 | 潍坊市天源环保科技有限公司 | A kind of air floatation machine gas distribution impeller |
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Application publication date: 20190809 |