CN105156361B - Blade root opens up the Profile For Compressor Stator leaf grating of wide arc groove - Google Patents
Blade root opens up the Profile For Compressor Stator leaf grating of wide arc groove Download PDFInfo
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- CN105156361B CN105156361B CN201510583793.9A CN201510583793A CN105156361B CN 105156361 B CN105156361 B CN 105156361B CN 201510583793 A CN201510583793 A CN 201510583793A CN 105156361 B CN105156361 B CN 105156361B
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- conduit
- leaf grating
- profile
- compressor stator
- blade root
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Classifications
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- 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
- F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
- F04D29/68—Combating cavitation, whirls, noise, vibration or the like; Balancing by influencing boundary layers
- F04D29/681—Combating cavitation, whirls, noise, vibration or the like; Balancing by influencing boundary layers especially adapted for elastic fluid pumps
- F04D29/682—Combating cavitation, whirls, noise, vibration or the like; Balancing by influencing boundary layers especially adapted for elastic fluid pumps by fluid extraction
-
- 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
- F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
- F04D29/68—Combating cavitation, whirls, noise, vibration or the like; Balancing by influencing boundary layers
- F04D29/681—Combating cavitation, whirls, noise, vibration or the like; Balancing by influencing boundary layers especially adapted for elastic fluid pumps
- F04D29/684—Combating cavitation, whirls, noise, vibration or the like; Balancing by influencing boundary layers especially adapted for elastic fluid pumps by fluid injection
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
Blade root opens up the Profile For Compressor Stator leaf grating of wide arc groove, is related to the passive flow control technique of impeller machinery technical field.Its object is to open up wide circular arc conduit towards suction surface from pressure by Profile For Compressor Stator leaf grating blade root end wall, high-speed jet is formed using blade itself pressure difference, increase angular region low energy fluid kinetic energy, blow down suction surface boundary-layer and end-wall boundary layer air-flow, so that resistance negative sequence harmonic ability is stronger, Coanda effect is also additionally brought, preferably suppresses corner separation.The conduit is located at Profile For Compressor Stator leaf grating blade root end wall, it is steady state value to open up to height, conduit can have one or more, conduit import is located at stator leaf grating pressure face, outlet is located at leaf grating suction surface, conduit center line is that circular arc and conduit two side and center line are equidistant, and channel sidewalls outlet is tangent with leaf grating suction surface downstream wall.The beneficial effects of the present invention are：Effectively suppress corner separation, increase leaf grating negotiability, reduce pitot loss, increase diffusion ability.
Description
Technical field
Controlled the present invention relates to Profile For Compressor Stator Cascade Flow, more particularly to a kind of suppression Profile For Compressor Stator corner separation
The flowing control program of Profile For Compressor Stator leaf grating blade root fluting, belongs to the passive flow control technique of impeller machinery technical field.
Background technology
In the internal flow of turbomachine, most complicated is the flowing of angular region, the corner region flow between suction surface and end wall
In there is end-wall boundary layer, blade boundary-layer, various vortex structures and its interaction, cause Profile For Compressor Stator penalty
Principal element.The flow separation of angular region can cause channel blockage, blade loading and diffusion ability to decline, so as to cause total crushing
Efficiency of becoming estranged declines, and engine surge can be caused when serious.The loss of Profile For Compressor Stator corner region flow is accounted in the total losses of level
Proportion is larger, therefore, it is to reduce angular region loss and delay to be caused due to corner separation to try to suppress Profile For Compressor Stator corner separation
Engine performance deterioration problem important channel.
At present, the flow control technique for Profile For Compressor Stator corner separation and stall can be largely classified into active control and
Two major classes of passive control.Active control technology mainly has plasma excitation, boundary layer blow-suck technology, synthesizing jet-flow etc.；Passively
Control technology mainly has vortex generator, wing fence, end wall moulding etc..These control methods all pros and cons coexist, angular region control method
Also need further research.
Our seminar's early stages propose blade root fluting control leaf grating corner separation technology (gas turbine test and grind
Study carefully, 2007, Vol.20, No.3,28-33), in Profile For Compressor Stator leaf grating blade root fluting, using between blade pressure surface and suction surface
Pressure difference form jet, increase the low energy fluid kinetic energy of angular region, the air-flow of blade suction surface and end-wall boundary layer is blown down, so as to press down
Corner separation processed.Specific implementation method is：Diverse location takes point A, B and C, D on blade pressure surface and suction surface respectively first,
Circular sliding slopes AC and BD is recycled to constitute conduit.Above-mentioned technology at least has the following disadvantages：For engineer applied, scheme ratio of slotting
Relatively idealize partially, connection circular arc is than more random, bad processing；The effluxvelocity direction for especially being formed is uncontrollable, Ke Nengyu
Main flow direction angle it is larger and produce " step " flow so as to produce negative effects so that control program is difficult to optimization design.
The content of the invention
It is an object of the present invention to propose a kind of easy to process, convenient control compressor to geometric Parameters Optimization Design
The blade root fluting control method of stator leaf grating corner separation flowing.
Technical scheme is as follows：
Conduit is opened up at the blade root end wall of axial-flow compressor stator leaf grating.
It is end wall plane that the conduit is opened up to lower wall surface, and it is steady state value to open up to height, and its constant interval is leaf grating height 2%
Value between 20%.
The conduit can have one or more.
The conduit import is located at Profile For Compressor Stator leaf grating pressure face.
The channel outlet is located at Profile For Compressor Stator leaf grating suction surface.
Axial location where the conduit import is positioned at the axial location upstream where channel outlet.
The conduit center line is circular arc, and conduit two side is equidistant with center line.
The channel sidewalls outlet is tangent with leaf grating suction surface downstream wall.
The beneficial effects of the present invention are：Opened towards suction surface from pressure by Profile For Compressor Stator leaf grating blade root end wall
If wide circular arc conduit, high-speed jet is formed using the pressure difference between blade pressure itself face and suction surface, increase angular region low
The kinetic energy of energy fluid so that its resistance negative sequence harmonic ability is stronger, it is to avoid flowing is prematurely formed corner separation；High-velocity fluid blows
Except suction surface boundary-layer and end-wall boundary layer air-flow so that the thinning acceleration of boundary-layer air-flow, boundary-layer velocity profile is fuller,
Resistance negative sequence harmonic ability is stronger, suppresses the flow separation of suction surface and end wall；Under channel sidewalls outlet and leaf grating suction surface
Trip wall is tangent so that high-speed jet velocity attitude is also substantially tangent with suction surface downstream wall, so as to also additionally bring health
Up to effect, very strong jet attached flow is produced, increased " circular rector ", also can preferably suppress corner separation.So as to increase cascade flow
Logical ability, reduces pitot loss, increases diffusion ability.
Compared with the control technology that our seminar's early stages are proposed, wide circular arc conduit center line of the invention is circle
Arc, perpendicular to the wall of end wall and equidistant with center line, channel outlet is tangent with leaf grating suction surface downstream, and conduit light is slipped over for conduit
Cross, beneficial to processing；And high-speed jet velocity attitude is controllable, it is easy to the optimization design of scheme of slotting, and bring extra
Coanda effect, there is more preferable corner separation inhibition.
Brief description of the drawings
Fig. 1 is that blade root opens up wide arc groove Profile For Compressor Stator cascade structure schematic diagram.
Fig. 2 is that blade root opens up wide arc groove Profile For Compressor Stator leaf grating conduit cross-sectional view.
Fig. 3 is that blade root opens up wide circular arc conduit Profile For Compressor Stator leaf grating and opened up to schematic diagram along leaf grating.
Fig. 4 is that blade root does not open up the prototype leaf grating leaf grating surface of wide arc groove and the motion pattern of end wall.
Fig. 5 is that blade root opens up the Profile For Compressor Stator leaf grating leaf grating surface of wide arc groove and the motion pattern of end wall.
Fig. 6 is that blade root opens up the owner pressure difference jet Profile For Compressor Stator leaf grating of wide arc groove and blade root does not open up the original of conduit
Type cascade performance comparative bid parameter.
Specific embodiment
Specific embodiment of the invention is illustrated below in conjunction with accompanying drawing.
As shown in figure 1, blade root opens up wide arc groove Profile For Compressor Stator leaf grating, at the root end wall 2 of leaf grating 1, from leaf grating 1
Pressure face 3 offers wide circular arc conduit 5 to suction surface 4.
As shown in Fig. 2 according to PVD prototype stator cascade flow field situations, conduit 5 is chosen in the position of the upper outlet of suction surface 4
Before burble point；Along leaf grating axial direction, conduit 5 is located at the outlet port upstream of suction surface 4 in the position of the upper inlet of pressure face 3；According to
PVD prototype stator leaf grating surface pressure distributions, conduit 5 the position of the upper inlet of pressure face 3 be selected in the upper surface static pressure of pressure face 3 compared with
General goal；Distance of the two side of conduit 5 away from center line is 3.6% axial chord length, and according to actual conditions, the value can be arrived 0.5%
It is adjusted between 6%.
As shown in figure 3, conduit 5 is being opened up to contour, 10% leaf exhibition height is, the value can be arrived 2% according to actual conditions
It is adjusted between 20% leaf exhibition height.
In order to verify effect of the invention, the present inventor does not open up the PVD prototypes leaf grating of conduit to blade root and blade root opens up
The Profile For Compressor Stator leaf grating of wide arc groove has carried out numerical simulation.Physical simulation parameter and result are as follows：
PVD Cascade Blade Profile parameters for simulating are as shown in the table：
As shown in Figure 4, Figure 5, by contrasting the motion pattern of the front and rear suction surface 4 of fluting and end wall 2 it can be found that blade root opens up
The Profile For Compressor Stator leaf grating of wide arc groove compared with the PVD prototype leaf gratings that blade root does not open up conduit, fluting rear end wall institute shape
Into separation flow region be obviously reduced, therefore blade root open up wide arc groove can delay and suppress separate generation.
As shown in fig. 6, by the total pressure loss coefficient of numerical simulation, deviation angle and pressure ratio results, it can be seen that fluting
The blade root for being shaped as wide circular arc slots Profile For Compressor Stator leaf grating compared with prototype leaf grating, and total pressure loss coefficient is reduced
56.52%, pressure ratio increased 0.039%, and deviation angle reduces 78.91%.
It can be seen that, blade root of the invention opens up the design of the Profile For Compressor Stator leaf grating of wide arc groove, by from leaf grating
Pressure improves end wall bounda layer flow condition towards leaf grating suction surface fluting jet, reduces end wall separated region area, real
The purpose for suppressing corner separation is showed.And then the loss caused by corner separation is reduced, and pitot loss is reduced, increase pressure
Than, deviation angle is reduced, be conducive to improving Capability of Compressor and its stability.
Claims (1)
1. a kind of axial-flow compressor stator leaf grating, it is characterised in that：
Conduit (5) is opened up at blade root end wall (2) place of axial-flow compressor stator leaf grating (1),
Wherein, it is end wall (2) plane that the conduit (5) is opened up to lower wall surface, and it is steady state value to open up to height, and its constant interval is leaf grating
Value highly between 2% to 20%,
The conduit (5) can have one or more,
The conduit (5) import is located at Profile For Compressor Stator leaf grating (1) pressure face (3),
Conduit (5) outlet is located at Profile For Compressor Stator leaf grating (1) suction surface (4),
Axial location where conduit (5) import is located at axial location upstream where conduit (5) is exported,
Conduit (5) center line is circular arc, and conduit (5) two side is equidistant with center line,
Conduit (5) sidewall exit is tangent with leaf grating suction surface (4) downstream.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510583793.9A CN105156361B (en) | 2015-09-14 | 2015-09-14 | Blade root opens up the Profile For Compressor Stator leaf grating of wide arc groove |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510583793.9A CN105156361B (en) | 2015-09-14 | 2015-09-14 | Blade root opens up the Profile For Compressor Stator leaf grating of wide arc groove |
Publications (2)
| Publication Number | Publication Date |
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| CN105156361A CN105156361A (en) | 2015-12-16 |
| CN105156361B true CN105156361B (en) | 2017-05-31 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105756719B (en) * | 2016-01-08 | 2018-02-06 | 北京航空航天大学 | A kind of Profile For Compressor Stator blade root grooving method based on optimized algorithm |
| CN112228401A (en) * | 2020-09-30 | 2021-01-15 | 大连海事大学 | Slotted vane diffuser |
| CN112610283B (en) * | 2020-12-17 | 2023-01-06 | 哈尔滨工业大学 | Turbine blade cascade designed by adopting end wall partition modeling |
| CN113418716B (en) * | 2021-06-05 | 2024-05-31 | 西北工业大学 | Blade cascade experimental device with adjustable blade top gap |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101092978A (en) * | 2007-07-30 | 2007-12-26 | 北京航空航天大学 | Synergic action device of preventing breath heavily and expanding stability of airbleed inside stator of multistage axial flow air compresdsor |
| CN101871466A (en) * | 2010-05-13 | 2010-10-27 | 北京航空航天大学 | Multi-blade row circular blown-suck air flowing control method for compression system of aviation turbofan engine |
| CN202266500U (en) * | 2011-09-01 | 2012-06-06 | 西北工业大学 | Gas compressor stator blade with pressure surface suction |
| JP2014020293A (en) * | 2012-07-19 | 2014-02-03 | Panasonic Corp | Compressor |
| CN103321960B (en) * | 2013-07-12 | 2015-07-15 | 西北工业大学 | Compressor stator blade with suction surface provided with suction grooves |
| CN103410779B (en) * | 2013-08-30 | 2015-08-19 | 哈尔滨工业大学 | A kind of flow separation method for stationary cascade of high-load axial flow air compressor |
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2015
- 2015-09-14 CN CN201510583793.9A patent/CN105156361B/en active Active
Non-Patent Citations (1)
| Title |
|---|
| 《静子叶片开槽处理对单级压气机特性影响的数值研究》;周敏,王如根,白云,曾令君;《空气动力学学报》;20090228;第27卷(第1期);第114-118页 * |
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