CN109374252A - A kind of compressor tandem cascade experimental provision - Google Patents
A kind of compressor tandem cascade experimental provision Download PDFInfo
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- CN109374252A CN109374252A CN201811138525.6A CN201811138525A CN109374252A CN 109374252 A CN109374252 A CN 109374252A CN 201811138525 A CN201811138525 A CN 201811138525A CN 109374252 A CN109374252 A CN 109374252A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M9/00—Aerodynamic testing; Arrangements in or on wind tunnels
- G01M9/02—Wind tunnels
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M9/00—Aerodynamic testing; Arrangements in or on wind tunnels
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Abstract
The invention discloses a kind of compressor tandem cascade experimental provisions, belong to cascade wind tunnel test field.The device includes a top grating 1 and a lower grid plate 2, corresponding preceding slot 20 and pit 21 are provided on top grating 1 and lower grid plate 2, the forward and backward leaf sliding block for opening up forward and backward blade slot 22 is respectively arranged in preceding slot 20 and pit 21, the axial direction or circumferential position of experimental needs mobile sliding block in slot, remaining space are filled and are fixed with cushion block；Tandem Blades To An Aeroengine to be tested is divided into front two rows, by the axial direction or circumferential position of sliding block mobile in slot before experiment, changes the relative positional relationship of blade row before and after tandem cascade experimental piece, that is, realizes the adjustment to axial spacing and circumferential spacing.The present invention can be achieved to be adjusted the axial spacing of a set of tandem cascade experimental piece and circumferential spacing, experimental piece production cost, production cycle, assembly time and memory space can be substantially saved compared to traditional leaf grating experimental piece, be conducive to the development of tandem cascade experimental study work, to further realize the control to the separation of compressor inside boundary-layer.
Description
Technical field
The present invention relates to cascade wind tunnel test field, specifically a kind of compressor tandem cascade experimental provision.
Background technique
Modern aeroengine is a kind of accurate complicated machinery, the jewel being known as on industrial imperial crown, compressor
Design requirement high pressure ratio, high load capacity.However due to, there are stronger adverse pressure gradient, often being led in high load capacity compressor blade row channel
It causes blade suction surface and angular region boundary-layer that serious separation occurs, loses and increase so as to cause compressor, efficiency decline.
Tandem Blades To An Aeroengine is the combined blade being made of the front two rows blade of close proximity.This is a kind of novel passive stream
Dynamic control technology, it can effectively control the flow separation inside compressor, improve the efficiency of blade loads and compressor.It is logical
It crosses the interlobate slit flow channel in front and back to accelerate high energy incoming flow, and guides the suction surface of rear blade into, blown down front vane tail
Low Energy Region, new boundary-layer can be re-formed in the leading edge of rear blade, and the development for preventing boundary-layer to separate is reduced in compressor
The loss as caused by low energy fluid can be such that the air-flow deflection angle of compressor blade and efficiency is more obviously improved.
For a tandem cascade, axial spacing is defined as frontal lobe trailing edge and the up-front axial distance of rear leaf；Circumferential spacing
It is defined as frontal lobe trailing edge and the up-front circumferential distance of rear leaf.Axial spacing and circumferential spacing are to determine tandem cascade front two rows leaf
The key parameter of piece relative position has conclusive influence to the mobile performance of tandem cascade.Only axial spacing and circumferential direction
The more excellent combination of spacing can just make tandem cascade embody the performance advantage better than traditional leaf grating.
In recent years, influence of the studies in China personnel to axial spacing and circumferential spacing to tandem cascade performance has been done more
Research.Experiment research is usually the tandem cascade for designing and manufacturing several set axial spacings and circumferential spacing combination, and
It is tested in cascade wind tunnel；Method of numerical simulation usually designs several set axial spacings and circumferential spacing in a computer
Combined tandem cascade, and numerical simulation is carried out by Fluid Mechanics Computation method.
Wu Guochuan, village table south, Guo Bingheng are published in 1-4 phase " International Journal of of volume 5 in 1988
Turbo&Jet Engines " paper " Experimental Investigation of Tandem Blade Cascades
With Double-Circular ARC Profiles ", by changing established angle, axial spacing and circumferential line space design and making
24 sets of tandem cascade experimental pieces have been made, a series of wind tunnel experiments are carried out to it, have obtained their performance and flow-data.
Song Yahui, Li Qiushi, Wu Hong are published in China Aviation association aero-engine numerical simulation in 2008 and digitlization
The paper " numerically modeling of the ultrasonic incoming flow tandem cascade back court position to flow effect " for designing seminar, passes through Numerical-Mode
It is quasi- to have studied the influence of circumferential spacing and axial spacing to tandem cascade performance and flow field under ultrasonic incoming flow.
Shen Chun, Teng Jinfang are published in the paper of the 5th phase in 2013 " science and technology and engineering ", and " relative axial position is to tandem
The numerically modeling that Cascade Aerodynamics influence ", numerical simulation has been carried out to the tandem cascade of 5 kinds of axial spacings, has investigated it to total
Body performance and flow.
Yang Songlin, Teng Jinfang, Qiang dawn blueness is published in the paper of the 2nd phase " power-saving technology " in 2016, and " circumferential offset distance is to tandem
The influence of Cascade Aerodynamics ", the tandem cascade of 5 kinds of computation hydrodynamics software study different circumferential spacing is in design point
With the overall performance and Flow details under nearly pumping point operating condition.
It can be seen that researcher is about axial spacing, circumferential spacing and tandem cascade with the development of Fluid Mechanics Computation
The relationship of energy has done a large amount of numerically modeling, but it is still necessary to test as verifying for the validity of numerical simulation now.Cascade wind tunnel
Experiment is still the most reliable method for studying the above problem.Since the combination of the axial spacing and circumferential spacing of experiment is more, such as
What low cost rapidly realizes that the tandem cascade that axially different spacing is combined with circumferential spacing becomes experimenter faces one
A critical issue.
If 5 axial positions and 13 circumferential positions combine the performance and flow behavior of lower Tandem Blades To An Aeroengine in order to obtain, need
Carry out 65 cascade wind tunnel tests.If needing to manufacture 65 sets of leaf grating experimental pieces using traditional CASCADE EXPERIMENT part structure,
Manufacturing cost is high, and there is also inconveniences for management and assembly.In order to adapt to the new situation of current tandem cascade experimental study, need
Traditional louver experiment device is improved.
Summary of the invention
In order to make up the deficiency of traditional louver experiment device, the invention proposes a kind of experiments of compressor tandem cascade to fill
It sets, slots respectively in the front vane of top grating and lower grid plate row and rear blade row's installation site, and place sliding block in wherein, frontal lobe
Piece row and rear blade row are respectively arranged in sliding block, and axial or circumferential movement can be realized in slot, to realize to tandem leaf
The adjustment of grid experimental piece axial spacing and circumferential spacing.
The technical scheme is that under a kind of compressor tandem cascade experimental provision, including a top grating 1 and one
Screen 2, two spacing columns 13 make two blocks of screens be in connection parallel and adjustable in pitch, before having on the top grating 1
Slot 20 and pit 21, be also provided at the corresponding position of lower grid plate 2 it is same before slot 20 and pit 21；Two pieces of frontal lobe sliding blocks 3 are distinguished
4~8 front vane slots 22 are circumferentially equidistantly opened up, and are respectively arranged in the preceding slot 20 of top grating 1 and lower grid plate 2, two
Leaf sliding block 4 circumferentially equidistantly opens up same number of rear blade slot 23 respectively after block, and is respectively arranged in top grating 1 under
In the pit 21 of screen 2, the axial direction or circumferential position of the mobile sliding block in slot, remaining space pad experimental can be needed
Block is filled and is fixed；Tandem Blades To An Aeroengine to be tested is divided into front two rows, before the both ends of front-seat blade are respectively placed in frontal lobe sliding block 3
In blade slot 22, the both ends of heel row blade are respectively placed in the rear blade slot 23 of rear leaf sliding block 4, by slot before experiment
The axial direction or circumferential position of mobile sliding block, thus it is possible to vary the relative positional relationship of blade row before and after tandem cascade experimental piece, i.e., in fact
Now to the adjustment of axial spacing and circumferential spacing.
The present invention can be achieved to be adjusted the axial spacing of a set of tandem cascade experimental piece and circumferential spacing, compared to tradition
CASCADE EXPERIMENT part can substantially save experimental piece production cost, production cycle, assembly time and memory space, be conducive to tandem leaf
The development of grid experimental study work, to further realize the control to the separation of compressor inside boundary-layer.
Detailed description of the invention
Fig. 1 is the overall three-dimensional view of the compressor tandem cascade experimental provision in embodiment 1
Fig. 2 is the top grating isometric drawing of compressor tandem cascade experimental provision in embodiment 1
Fig. 3 is the top grating top view and cross-sectional view of the compressor tandem cascade experimental provision in embodiment 1
Fig. 4 is the lower grid plate isometric drawing of the compressor tandem cascade experimental provision in embodiment 1
Fig. 5 is the lower grid plate top view and cross-sectional view of the compressor tandem cascade experimental provision in embodiment 1
Fig. 6 is the frontal lobe sliding block isometric drawing of the compressor tandem cascade experimental provision in embodiment 1
Fig. 7 is the frontal lobe sliding block top view of the compressor tandem cascade experimental provision in embodiment 1
Fig. 8 is the rear leaf sliding block isometric drawing of the compressor tandem cascade experimental provision in embodiment 1
Fig. 9 is the rear leaf sliding block top view of the compressor tandem cascade experimental provision in embodiment 1
Figure 10 is that the pressure face of the compressor tandem cascade experimental provision in embodiment 1 opens the front vane main view of static pressure hole
Figure 11 is that the pressure face of the compressor tandem cascade experimental provision in embodiment 1 opens the front vane left view of static pressure hole
Figure 12 is that the suction surface of the compressor tandem cascade experimental provision in embodiment 1 opens the front vane main view of static pressure hole
Figure 13 is that the suction surface of the compressor tandem cascade experimental provision in embodiment 1 opens the front vane left view of static pressure hole
Figure 14 is that the pressure face of the compressor tandem cascade experimental provision in embodiment 1 opens the rear blade main view of static pressure hole
Figure 15 is that the pressure face of the compressor tandem cascade experimental provision in embodiment 1 opens the rear blade left view of static pressure hole
Figure 16 is that the suction surface of the compressor tandem cascade experimental provision in embodiment 1 opens the rear blade main view of static pressure hole
Figure 17 is that the suction surface of the compressor tandem cascade experimental provision in embodiment 1 opens the rear blade left view of static pressure hole
Figure 18 is the front vane main view of the accident static pressure of the compressor tandem cascade experimental provision in embodiment 1
Figure 19 is the front vane left view of the accident static pressure of the compressor tandem cascade experimental provision in embodiment 1
Figure 20 is the rear blade main view of the accident static pressure of the compressor tandem cascade experimental provision in embodiment 2
Figure 21 is the rear blade left view of the accident static pressure of the compressor tandem cascade experimental provision in embodiment 2
Figure 22 is the frontal lobe cushion block isometric drawing of the compressor tandem cascade experimental provision in embodiment 2
Figure 23 is the rear knot block isometric drawing of the compressor tandem cascade experimental provision in embodiment 2
Figure 24 is the spacing column 3-D view of the compressor tandem cascade experimental provision in embodiment 2
Figure 25 is the spacing column main view of the compressor tandem cascade experimental provision in embodiment 2
Figure 26 is the overall three-dimensional view of the compressor tandem cascade experimental provision in embodiment 2
Figure 27 is the top grating isometric drawing of the compressor tandem cascade experimental provision in embodiment 2
Figure 28 is the top grating top view and cross-sectional view of the compressor tandem cascade experimental provision in embodiment 2
Figure 29 is the lower grid plate isometric drawing of the compressor tandem cascade experimental provision in embodiment 2
Figure 30 is the lower grid plate top view and cross-sectional view of the compressor tandem cascade experimental provision in embodiment 2
Figure 31 is the overall three-dimensional view of the compressor tandem cascade experimental provision in embodiment 3
Figure 32 is the top grating isometric drawing of the compressor tandem cascade experimental provision in embodiment 3
Figure 33 is the top grating top view and cross-sectional view of the compressor tandem cascade experimental provision in embodiment 3
Figure 34 is the lower grid plate isometric drawing of the compressor tandem cascade experimental provision in embodiment 3
Figure 35 is the lower grid plate top view and cross-sectional view of the compressor tandem cascade experimental provision in embodiment 3
In figure: 1 --- top grating (blade tip), 2 --- lower grid plate (blade root), 3 --- frontal lobe sliding block, 4 --- rear leaf sliding block,
5 --- pressure face opens the front vane of static pressure hole, and 6 --- suction surface opens the front vane of static pressure hole, and 7 --- pressure face opens static pressure hole
Rear blade, 8 --- suction surface opens the rear blade of static pressure hole, and 9 --- the front vane of accident static pressure, 10 --- the rear leaf of accident static pressure
Piece, 11 --- frontal lobe cushion block, 12 --- rear knot block, 13 --- spacing column, 14 --- spacing column mounting screw, 15 --- spacing
Column installation through-hole, 16 --- static tube, 17 --- slot upstream side holding screw tapped through hole before screen, 18 --- screen pit
Two sides holding screw tapped through hole, 19 --- screen pit two sides unthreaded hole, 20 --- slot before screen, 21 --- after screen
Slot, 22 --- front vane slot, 23 --- rear blade slot, 24 --- blade surface static pressure hole, 25 --- blade cavity
Specific embodiment
Embodiment 1: the present embodiment is a kind of compressor tandem cascade experimental provision, between the axial direction of adjustable tandem cascade
Away from circumferential spacing.
As shown in Figure 1, a kind of compressor tandem cascade experimental provision that this implementing regulations proposes includes top grating 1, lower grid
Front vane 5, the suction surface that plate 2, frontal lobe sliding block 3, rear leaf sliding block 4, pressure face open static pressure hole open the front vane 6 of static pressure hole, pressure
Rear blade 7, the suction surface that static pressure hole is opened in face open the rear leaf of the rear blade 8 of static pressure hole, the front vane 9 of accident static pressure, accident static pressure
Piece 10, frontal lobe cushion block 11, rear knot block 12, spacing column 13.The present apparatus mirror surface pair above and below section in the middle part of the blade height on the whole
Claim, top grating 1 and lower grid plate 2 are connected by screw 14 with spacing column 13.One frontal lobe sliding block 3 divides with two frontal lobe cushion blocks 11
The preceding slot 20 (as shown in Figure 3 and Figure 5) of top grating 1 and lower grid plate 2 is not filled symmetrical above and belowly, and by as shown in Figure 3 and Figure 5
The holding screw for being mounted on threaded hole 17 is fixed.Knot block 12 is distinguished after leaf sliding block 4 is with two after one fills symmetrical above and belowly
The pit 21 (as shown in Figure 3 and Figure 5) of top grating 1 and lower grid plate 2, and by being mounted on threaded hole 18 as shown in Figure 3 and Figure 5
Holding screw is fixed.Front vane 5, the suction surface that pressure face opens static pressure hole open the front vane 6 and four accident static pressure of static pressure hole
Front vane 9 be installed between the front vane slot 22 of two pieces of frontal lobe sliding blocks 3；Pressure face opens rear blade 7, the suction surface of static pressure hole
The rear blade slot 23 of leaf sliding block 4 after the rear blade 10 of the rear blade 8 and four accident static pressure of opening static pressure hole is installed on two pieces
Between.
The structure of top grating 1 is as shown in Figures 2 and 3.1 thickness 20mm of top grating opens the slot there are two 11mm depth, by cascade axis
Slot 20 and pit 21 before being divided into position.As shown in Figure 1, preceding slot 20 is located at the updrift side of wind-tunnel, according to experiment to axial direction
The requirement of spacing corresponding position in slot installs frontal lobe sliding block 3, and tandem cascade front vane row is installed on frontal lobe sliding block 3.Before
The remaining space of slot 20 axial position that frontal lobe sliding block 3 is accurately controlled according to the prefabricated filling of frontal lobe cushion block 11 of experimental program
And prevent gas leakage.In fact the size of frontal lobe cushion block 11 determines the position of frontal lobe sliding block 3, also determines the axial direction of tandem cascade
Spacing.Pit 21 is located at the downstream direction of preceding slot, according to requirement of the experiment to circumferential spacing in slot leaf after corresponding position installation
Sliding block 4, tandem cascade rear blade row are installed on rear leaf sliding block 4.The remaining space of pit 21 is with prefabricated according to experimental program
The filling of rear knot block 12 with the circumferential position of leaf sliding block 4 after accurately controlling and prevent gas leakage.Equally, the size of rear knot block 12
The position for determining rear leaf sliding block 4 also determines the circumferential spacing of tandem cascade.It is complete in the intermediate region of preceding slot 20 and pit 21
Screen is got through entirely, so that the static tube 16 of intermediate blade as shown in Figure 1 can stretch out screen in adjustable extent.In preceding slot 20
Updrift side there are two tapped through hole 17, for installing holding screw, to fix frontal lobe sliding block 3 and frontal lobe cushion block 11.Rear
Respectively there is a tapped through hole 18 in the left side and right side of slot 21, for installing holding screw, with leaf sliding block 4 after fixation and rear knot block
12.There is a coaxial unthreaded hole 19 in the outside of tapped through hole 18, and diameter is slightly larger than 18 outer diameter of tapped through hole, in order to tightening
The insertion and installation of screw.In order to facilitate the installation in cascade wind tunnel test section, it is provided with nine peaces altogether at left and right sides of top grating 1
Through-hole 15 is filled for installing two spacing columns 13, the through-hole 15 that will not be interfered with test chamber is selected when installation.
The structure of lower grid plate 2 is as shown in Figure 4 and Figure 5.Lower grid plate 2 and top grating 1 mirror above and below section in the middle part of blade height
Face is symmetrical, and therefore, not repeat them here.As shown in connection with fig. 1,13 1 the first from left of spacing column of two 100mm long is right is pacified by screw 14 respectively
Mounted in 2 two sides of top grating 1 and lower grid plate, plays the role of connection, fixation and control upper lower grid plate spacing.
Frontal lobe sliding block 3 as shown in Figure 6 and Figure 7, be a cuboid, it is highly identical as the depth of preceding slot 20, circumferential size with
Preceding slot 20 is identical and constitutes clearance fit.Frontal lobe sliding block 3 circumferentially equidistantly offers the front vane slot 22 of 6 perforations, preceding
The section of blade slot 22 is consistent with front vane both ends plug and constitutes clearance fit.As shown in connection with fig. 1, four accident static pressure
Front vane 9 is installed on the leftmost side two and the slot 22 of the rightmost side two by clearance fit；Pressure face opens the front vane 5 of static pressure hole
The front vane 6 for opening static pressure hole with suction surface is installed on intermediate two slots 22 by clearance fit, and pressure face is made to open static pressure
It is opposite that the pressure face of the front vane 5 in hole and suction surface open the suction surface of front vane 6 of static pressure hole, to measure most intermediate blade channel
The blade surface static pressure of two sides.Two frontal lobe sliding blocks 3 are installed on symmetrical above and belowly in the preceding slot 20 of top grating 1 and lower grid plate 2, peace
Holding position is determined according to axial spacing needed for experiment.The front-seat blade of 100mm high be installed on above-mentioned two frontal lobe sliding block 3 it
Between, and be fixedly clamped after mounting by being mounted on the screw 14 at two 13 both ends of 100mm spacing column.
Afterwards leaf sliding block 4 as shown in Figure 8 and Figure 9, be a cuboid, it is highly identical as the depth of pit 21, axial dimension with
Pit 21 is identical and constitutes clearance fit.Leaf sliding block 4 circumferentially equidistantly offers the rear blade slot 23 of 6 perforations afterwards, after
The section of blade slot 23 is consistent with rear blade both ends plug and constitutes clearance fit.As shown in connection with fig. 1, four accident static pressure
Rear blade 10 is installed on the leftmost side two and the slot 23 of the rightmost side two by clearance fit；Pressure face opens the rear blade of static pressure hole
7 and suction surface open the rear blade 8 of static pressure hole and intermediate two slots 23 be installed on by clearance fit, and pressure face is made to open static pressure
It is opposite that the pressure face of the rear blade 7 in hole and suction surface open the suction surface of rear blade 8 of static pressure hole, to measure most intermediate blade channel
The blade surface static pressure of two sides.Leaf sliding block 4 is installed on symmetrical above and belowly in the pit 21 of top grating 1 and lower grid plate 2 after two, peace
Holding position is determined according to circumferential spacing needed for experiment.The heel row blade of 100mm high be installed on it is above-mentioned two after leaf sliding block 4 it
Between, and be fixedly clamped after mounting by being mounted on the screw 14 at two 13 both ends of 100mm spacing column.
Pressure face opens the front vane 5 of static pressure hole as shown in Figure 10 and Figure 11, chord length 34.7mm, the high 100mm of leaf, import geometry
Angle is 55 degree, and outlet geometry angle is 32 degree.The part type face of blade upper and lower ends each extends over 10 millimeters of formation plugs, when assembly
The front vane slot 22 injected on frontal lobe sliding block 3 is fixed.It is equal along chord length direction respectively away from blade root 10mm and 50mm leaf eminence
It is provided with 8 static pressure holes 24 perpendicular to pressure face, diameter 0.4mm, and the cavity for being 0.8mm by blade interior diameter evenly
25 are drawn out to outside with the static tube 16 for being inserted into 25 outlet end of cavity and sealing, can measure blade surface by pressure scanning valve
Static pressure.
Suction surface opens the front vane 6 of static pressure hole as shown in Figure 12 and Figure 13, and blade profile and above-mentioned pressure face open static pressure hole
Front vane 5 it is identical, but be equably provided with 8 perpendicular to suction along chord length direction respectively away from blade root 10mm and 50mm leaf eminence
The static pressure hole 24 in face, diameter 0.4mm, and be the cavity 25 of 0.8mm and insertion 25 outlet end of cavity by blade interior diameter
And the static tube 16 sealed is drawn out to outside, can measure blade surface static pressure by pressure scanning valve.
Pressure face opens the rear blade 7 of static pressure hole as shown in Figure 14 and Figure 15, chord length 34.7mm, the high 100mm of leaf, import geometry
Angle is 38 degree, and outlet geometry angle is -8 degree.Rear blade chord length is identical as front vane, and bent angle is twice of front vane, correlative study
The chord length and bent angle for showing tandem cascade front and back leaf can show preferable performance under above-mentioned configuration.Blade upper and lower ends
Part type face each extend over 10 millimeters of formation plugs, the rear blade slot 23 after when assembly is injected on leaf sliding block 4 is fixed.
8 static pressure holes 24 perpendicular to pressure face are equably being provided with along chord length direction respectively away from blade root 10mm and 50mm leaf eminence, directly
Diameter is 0.4mm, and passes through cavity 25 and insertion 25 outlet end of cavity that blade interior diameter is 0.8mm and the static tube 16 of sealing
It is drawn out to outside, blade surface static pressure can be measured by pressure scanning valve.
Suction surface opens the rear blade 8 of static pressure hole as shown in Figure 16 and Figure 17, and blade profile and above-mentioned pressure face open static pressure hole
Rear blade 7 it is identical, but be equably provided with 8 perpendicular to suction along chord length direction respectively away from blade root 10mm and 50mm leaf eminence
The static pressure hole 24 in face, diameter 0.4mm, and be the cavity 25 of 0.8mm and insertion 25 outlet end of cavity by blade interior diameter
And the static tube 16 sealed is drawn out to outside, can measure blade surface static pressure by pressure scanning valve.
As shown in Figure 18 and Figure 19, blade profile opens the frontal lobe of static pressure hole with above-mentioned pressure face to the front vane 9 of accident static pressure
Piece 5 is identical, but does not have blade surface static pressure hole and internal cavities.
As shown in Figure 20 and Figure 21, blade profile opens the rear leaf of static pressure hole with above-mentioned pressure face to the rear blade 10 of accident static pressure
Piece 7 is identical, but does not have blade surface static pressure hole and internal cavities.
Frontal lobe cushion block 11 is a cuboid as shown in figure 22, highly identical as the depth of preceding slot 20, circumferential size and preceding slot
20 is identical and constitute clearance fit.Slot 20 is surplus before being used to fill top grating 1 and lower grid plate 2 after 3 position of frontal lobe sliding block determines
Complementary space, and fixed by the holding screw of 20 upstream side threaded hole 17 of slot before being mounted on.It will be according to preplaning before experiment
Axial spacing prepares corresponding frontal lobe cushion block 11.Frontal lobe cushion block 11 is actually played to the positioning of frontal lobe sliding block 3, fixed and reduction leakage
The effect of gas.
Knot block 12 is a cuboid, highly identical as the depth of pit 21, axial dimension and pit as shown in figure 23 afterwards
21 is identical and constitute clearance fit.For filling the surplus of 2 pit 21 of top grating 1 and lower grid plate after rear 4 position of leaf sliding block determines
Complementary space, and two holding screws by being mounted on 21 two sides threaded hole 18 of pit are fixed.It will be according to preplaning before experiment
Circumferential spacing prepare it is corresponding after knot block 12.Knot block 12 is actually played to the positioning of rear leaf sliding block 4, fixed and reduction afterwards
The effect of gas leakage.
Spacing column 13 is highly 100mm as shown in figures 24 and 25, with blade height with high.13 both ends of spacing column are provided with
Tapped blind hole, for being connect with screw 14.As shown in Figure 1, nine installation through-holes are opened at left and right sides of top grating 1 and lower grid plate 2 altogether
15, two 13 1 the first from left of spacing column are right to be mounted on 2 two sides of top grating 1 and lower grid plate by screw 14 respectively, plays connection, fixation
And control the effect of 2 spacing of top grating 1 and lower grid plate.
The assembling process of experimental provision:
Step 1: the root end of the front vane 9 of four accident static pressure to be respectively arranged in the leftmost side of one piece of frontal lobe sliding block 3
In two and the slot 22 of the rightmost side two；Front vane 5, suction surface that pressure face opens static pressure hole are opened into the front vane 6 of static pressure hole
Root end is installed on the slot 22 of centre 2 of the frontal lobe sliding block 3, and keeps two static pressure hole measuring surface opposite.Then by another
Frontal lobe sliding block 3 is mounted on the blade tip end of above-mentioned 6 blades.
Step 2: after the root end of the rear blade 10 of four accident static pressure is respectively arranged in one piece leaf sliding block 4 it is most left
In side two and the slot 23 of the rightmost side two；Rear blade 7, suction surface that pressure face opens static pressure hole are opened to the rear blade 8 of static pressure hole
Root end be installed on the slot 23 of centre 2 of the rear leaf sliding block 4, and keep two static pressure hole measuring surface opposite.It then will be another
Leaf sliding block 4 is mounted on the blade tip end of above-mentioned 6 blades after a.
Step 3: the whole root end frontal lobe sliding block 3 that the first step is assembled is placed in the preceding slot 20 of lower grid plate 2,
And the position of frontal lobe sliding block 3 is adjusted in slot according to the axial spacing of planning of experiments, and fill one piece or two pieces in remaining space
Prefabricated frontal lobe cushion block 11 only need to fill one piece of frontal lobe cushion block in the other end that is, if frontal lobe sliding block 3 is in one end of preceding slot 20
11, if frontal lobe sliding block 3, in the middle position of preceding slot 20, both ends need one piece of frontal lobe cushion block 11 of each filling.Finally use clamp screw
To fix frontal lobe cushion block 11 and frontal lobe sliding block 3 in two tapped through holes 17 of 20 upstream side of slot before nail is installed on.
Step 4: leaf sliding block 4 after the root end for the entirety that second step assembles is placed in the pit 21 of lower grid plate 2,
And after being adjusted in slot according to the circumferential spacing of planning of experiments leaf sliding block 4 position, and remaining space fill two pieces it is prefabricated
Knot block 12 afterwards is finally installed in the tapped through hole 18 of 21 two sides of pit with holding screw with knot block 12 after fixation and rear leaf
Sliding block 4.
Step 5: blade tip end frontal lobe sliding block 3 and rear leaf sliding block 4 are mounted in the preceding slot 20 and pit 21 of top grating 1, and
Frontal lobe cushion block 11 identical with third step is filled in the symmetric position of preceding slot 20, in symmetric position filling and the 4th step of pit 21
Knot block 12 after identical two pieces, before being finally installed on two holding screws in the tapped through hole 17 of preceding 20 upstream side of slot with fixation
Knot block 11 and frontal lobe sliding block 3；Two holding screws are installed in the tapped through hole 18 of 21 two sides of pit with knot after fixation
Block 12 and rear leaf sliding block 4.
Step 6: the both ends of two spacing columns 13 are mounted on lower grid plate 2 with screw 14 respectively and the two sides of top grating 1 lead to
Between hole 15.If spacing column 13 is interfered with test section component during subsequent installation is to test chamber, can
Select the through-hole 15 of another suitable position.
After being completed according to preset axial spacing and circumferential spacing to the assembly of the experimental provision, which is installed to
It is tested in cascade wind tunnel test section.The device is removed after experiment, is needed tandem according to next step experimental program
The axial spacing of leaf grating or circumferential spacing are adjusted.It needs to carry out experimental provision part disassembly, adjustment at this time and pacifies again
Dress.
The screw 14 at two 13 both ends of spacing column is unloaded first, it is sliding to blade and frontal lobe to unclamp top grating 1 and lower grid plate 2
The clamping of block 3 and rear leaf sliding block 4.Since the preceding slot 20 of frontal lobe sliding block 3, frontal lobe cushion block 11 and top grating 1 and lower grid plate 2 is gap
The pit 21 of cooperation, rear leaf sliding block 4 and rear knot block 12 and top grating 1 and lower grid plate 2 is also clearance fit, thus only need by
The holding screw in holding screw and threaded hole 18 in 2 threaded hole 17 of top grating 1 and lower grid plate is unscrewed, can be by top grating 1
It is unloaded with lower grid plate 2.It is opened again according to the axial spacing tested and circumferential spacing next time from the 4th step of assembling process later
Begin to assemble.
Embodiment 2: the present embodiment is a kind of compressor tandem cascade experimental provision, between the circumferential direction of adjustable tandem cascade
Away from.
Embodiment 2 is difference from example 1 is that frontal lobe position is fixed, the circumferential position of leaf after only can adjust, therefore
Frontal lobe sliding block 3 and frontal lobe cushion block 11 is omitted.Top grating 1 and lower grid plate 2 are without preceding slot 20 instead front vane simultaneously
Slot 22；Top grating 1 and lower grid plate 2 be not also for installing the tapped through hole 17 of holding screw.
As shown in figure 26, a kind of compressor tandem cascade experimental provision that this implementing regulations proposes includes top grating 1, lower grid
Front vane 6, the pressure face that front vane 5, the suction surface that plate 2, rear leaf sliding block 4, pressure face open static pressure hole open static pressure hole open static pressure hole
Rear blade 7, suction surface open the rear blade 8 of static pressure hole, the front vane 9 of accident static pressure, the rear blade 10 of accident static pressure, rear knot
Block 12, spacing column 13.Mirror surface is symmetrical above and below section in the middle part of blade height on the whole for the present apparatus, and top grating 1 and lower grid plate 2 pass through
Screw 14 is connected with spacing column 13.Knot block 12 is distinguished and fills top grating 1 symmetrical above and belowly after leaf sliding block 4 and two after one
With the pit 21 (as shown in Figure 28 and Figure 30) of lower grid plate 2, and by being mounted on the tight of threaded hole 18 as shown in Figure 28 and Figure 30
Determine screw to fix.Front vane 5, the suction surface that pressure face opens static pressure hole open the front vane 6 and four accident static pressure of static pressure hole
Front vane 9 is installed between top grating 1 and the front vane slot 22 of lower grid plate 2 by clearance fit；Pressure face opens static pressure hole
The rear blade 10 of rear blade 8 and four accident static pressure that rear blade 7, suction surface open static pressure hole is installed on two by clearance fit
After block between the rear blade slot 23 of leaf sliding block 4.
The structure of top grating 1 is as shown in Figure 27 and Figure 28.1 thickness 20mm of top grating, circumferentially in front vane installation site etc.
Spacing offers the front vane slot 22 of 6 perforations, and the section of front vane slot 22 is consistent with front vane both ends plug and constitutes
Clearance fit.Top grating 1 is provided with the pit 21 of a 11mm depth in rear blade installation region.As shown in figure 26, pit 21 is located at
The downstream direction of front vane row, according to requirement of the experiment to circumferential spacing in slot leaf sliding block 4, tandem leaf after corresponding position installation
Grid rear blade row is installed on rear leaf sliding block 4.The remaining space of the pit 21 rear knot block 12 prefabricated according to experimental program
Filling is with the circumferential position of leaf sliding block 4 after accurately controlling and prevents gas leakage.In fact, the size of rear knot block 12 determines rear leaf
The position of sliding block 4 determines the circumferential spacing of tandem cascade.Screen is got through completely in the intermediate region of pit 21, so that as schemed
The static tube 16 of intermediate blade shown in 26 can stretch out screen in adjustable extent.Respectively have one in the left side of pit 21 and right side
A tapped through hole 18, for installing holding screw, with leaf sliding block 4 after fixation and rear knot block 12.The outside of tapped through hole 18 has
One coaxial unthreaded hole 19, diameter is slightly larger than 18 outer diameter of tapped through hole, in order to the insertion and installation of holding screw.In order to
The convenient installation in cascade wind tunnel test section, be provided at left and right sides of top grating 1 altogether nine installation through-holes 15 for install two
Spacing column 13 selects the through-hole 15 that will not be interfered with test chamber when installation.
The structure of lower grid plate 2 is as shown in Figure 29 and Figure 30.Lower grid plate 2 and top grating 1 are above and below section in the middle part of blade height
Mirror surface is symmetrical, and therefore, not repeat them here.In conjunction with shown in Figure 26,13 1 the first from left of spacing column of two 100mm long is right to pass through screw respectively
14 are mounted on 2 two sides of top grating 1 and lower grid plate, play the role of connection, fixation and control upper lower grid plate spacing.
Afterwards leaf sliding block 4 as shown in Figure 8 and Figure 9, be a cuboid, it is highly identical as the depth of pit 21, axial dimension with
Pit 21 is identical and constitutes clearance fit.Leaf sliding block 4 circumferentially equidistantly offers the rear blade slot 23 of 6 perforations afterwards, after
The section of blade slot 23 is consistent with rear blade both ends plug and constitutes clearance fit.In conjunction with shown in Figure 26, four accident static pressure
Rear blade 10 leftmost side two and the slot 23 of the rightmost side two are installed on by clearance fit；Pressure face opens the rear leaf of static pressure hole
The rear blade 8 that piece 7 and suction surface open static pressure hole is installed on intermediate two slots 23 by clearance fit, and it is quiet to open pressure face
It presses pressure face and the suction surface of the rear blade 7 in hole to open the suction surface of rear blade 8 of static pressure hole opposite, is led to measuring most intermediate blade
The blade surface static pressure of road two sides.Leaf sliding block 4 is installed on symmetrical above and belowly in the pit 21 of top grating 1 and lower grid plate 2 after two,
Installation site is determined according to circumferential spacing needed for experiment.The heel row blade of 100mm high be installed on it is above-mentioned two after leaf sliding block 4 it
Between, and be fixedly clamped after mounting by being mounted on the screw 14 at two 13 both ends of 100mm spacing column.
Pressure face opens the front vane 5 of static pressure hole as shown in Figure 10 and Figure 11, chord length 34.7mm, the high 100mm of leaf, import geometry
Angle is 55 degree, and outlet geometry angle is 32 degree.The part type face of blade upper and lower ends each extends over 10 millimeters of formation plugs, when assembly
The front vane slot 22 injected on top grating 1 and lower grid plate 2 is fixed.Away from blade root 10mm and 50mm leaf eminence respectively along chord length
Direction is equably provided with 8 static pressure holes 24 perpendicular to pressure face, diameter 0.4mm, and is 0.8mm by blade interior diameter
Cavity 25 and insertion 25 outlet end of cavity and seal static tube 16 be drawn out to outside, leaf can be measured by pressure scanning valve
Piece Surface Static Pressure.
Suction surface opens the front vane 6 of static pressure hole as shown in Figure 12 and Figure 13, and blade profile and above-mentioned pressure face open static pressure hole
Front vane 5 it is identical, but be equably provided with 8 perpendicular to suction along chord length direction respectively away from blade root 10mm and 50mm leaf eminence
The static pressure hole 24 in face, diameter 0.4mm, and be the cavity 25 of 0.8mm and insertion 25 outlet end of cavity by blade interior diameter
And the static tube 16 sealed is drawn out to outside, can measure blade surface static pressure by pressure scanning valve.
Pressure face opens the rear blade 7 of static pressure hole as shown in Figure 14 and Figure 15, chord length 34.7mm, the high 100mm of leaf, import geometry
Angle is 38 degree, and outlet geometry angle is -8 degree.Rear blade chord length is identical as front vane, and bent angle is twice of front vane, correlative study
The chord length and bent angle for showing tandem cascade front and back leaf can show preferable performance under above-mentioned configuration.Blade upper and lower ends
Part type face each extend over 10 millimeters of formation plugs, the blade slot 23 after when assembly is injected on leaf sliding block 4 is fixed.?
8 static pressure holes 24 perpendicular to pressure face, diameter are equably provided with along chord length direction respectively away from blade root 10mm and 50mm leaf eminence
For 0.4mm, and drawn by the static tube 16 of cavity 25 and insertion 25 outlet end of cavity that blade interior diameter is 0.8mm and sealing
Outside is arrived out, and blade surface static pressure can be measured by pressure scanning valve.
Suction surface opens the rear blade 8 of static pressure hole as shown in Figure 16 and Figure 17, and blade profile and above-mentioned pressure face open static pressure hole
Rear blade 7 it is identical, but be equably provided with 8 perpendicular to suction along chord length direction respectively away from blade root 10mm and 50mm leaf eminence
The static pressure hole 24 in face, diameter 0.4mm, and be the cavity 25 of 0.8mm and insertion 25 outlet end of cavity by blade interior diameter
And the static tube 16 sealed is drawn out to outside, can measure blade surface static pressure by pressure scanning valve.
As shown in Figure 18 and Figure 19, blade profile opens the frontal lobe of static pressure hole with above-mentioned pressure face to the front vane 9 of accident static pressure
Piece 5 is identical, but does not have blade surface static pressure hole and internal cavities.
As shown in Figure 20 and Figure 21, blade profile opens the rear leaf of static pressure hole with above-mentioned pressure face to the rear blade 10 of accident static pressure
Piece 7 is identical, but does not have blade surface static pressure hole and internal cavities.
Knot block 12 is a cuboid, highly identical as the depth of pit 21, axial dimension and pit as shown in figure 23 afterwards
21 is identical and constitute clearance fit.For filling the surplus of 2 pit 21 of top grating 1 and lower grid plate after rear 4 position of leaf sliding block determines
Complementary space, and two holding screws by being mounted on 21 two sides threaded hole 18 of pit are fixed.It will be according to preplaning before experiment
Circumferential spacing prepare it is corresponding after knot block 12.Knot block 12 is actually played to the positioning of rear leaf sliding block 4, fixed and reduction afterwards
The effect of gas leakage.
Spacing column 13 is highly 100mm as shown in figures 24 and 25, with blade height with high.13 both ends of spacing column are provided with
Tapped blind hole, for being connect with screw 14.As shown in figure 26, nine installation through-holes are opened altogether at left and right sides of top grating 1 and lower grid plate 2
15, two 13 1 the first from left of spacing column are right to be mounted on 2 two sides of top grating 1 and lower grid plate by screw 14 respectively, plays connection, fixation
And control the effect of 2 spacing of top grating 1 and lower grid plate.
The assembling process of experimental provision:
Step 1: by the root end of the front vane 9 of four accident static pressure be respectively arranged in lower grid plate 2 the leftmost side two and
In the slot 22 of the rightmost side two；Front vane 5, suction surface that pressure face opens static pressure hole are opened to the root end of the front vane 6 of static pressure hole
It is installed on the slot 22 of centre 2 of lower grid plate 2, and keeps two static pressure hole measuring surface opposite.
Step 2: after the root end of the rear blade 10 of four accident static pressure is respectively arranged in one piece leaf sliding block 4 it is most left
In side two and the slot 23 of the rightmost side two；Rear blade 7, suction surface that pressure face opens static pressure hole are opened to the rear blade 8 of static pressure hole
Root end be installed on the slot 23 of centre 2 of the rear leaf sliding block 4, and keep two static pressure hole measuring surface opposite.It then will be another
Leaf sliding block 4 is mounted on the blade tip end of above-mentioned 6 blades after a.
Step 3: leaf sliding block 4 after the root end for the entirety that second step assembles is placed in the pit 21 of lower grid plate 2,
And after being adjusted in slot according to the circumferential spacing of planning of experiments leaf sliding block 4 position, and remaining space fill two pieces it is prefabricated
Knot block 12 afterwards is finally installed in the tapped through hole 18 of 21 two sides of pit with holding screw with knot block 12 after fixation and rear leaf
Sliding block 4.
Step 4: the entirety assembled before mobile, by the circumferential slider at the blade tip end of front vane 5,6,9 and rear leaf blade tip end
4 are mounted in the front vane slot 22 and pit 21 of top grating 1, and fill identical as third step two in the symmetric position of pit 21
Two holding screws are finally installed in the tapped through hole 18 of 21 two sides of pit with knot block 12 after fixation by knot block 12 after block
With rear leaf sliding block 4.
Step 5: the both ends of two spacing columns 13 are mounted on lower grid plate 2 with screw 14 respectively and the two sides of top grating 1 lead to
Between hole 15.If spacing column 13 is interfered with test section component during subsequent installation is to test chamber, can
Select the through-hole 15 of another suitable position.
After completing according to preset circumferential spacing to the assembly of the experimental provision, which is installed to cascade wind tunnel examination
It tests in section and is tested.The device is removed after experiment, is needed the circumferential direction of tandem cascade according to next step experimental program
Spacing is adjusted.It needs to carry out experimental provision part disassembly at this time, adjust and reinstall.
The screw 14 at two 13 both ends of spacing column is unloaded first, it is sliding to blade and rear leaf to unclamp top grating 1 and lower grid plate 2
The clamping of block 4.Since the pit 21 of rear leaf sliding block 4 and rear knot block 12 and top grating 1 and lower grid plate 2 is clearance fit, so
It only needs to unscrew the holding screw in 2 threaded hole 18 of top grating 1 and lower grid plate, it can be by top grating 1 and lower grid plate 2 from rear leaf
It unloads at 4 both ends of sliding block.Restart to assemble from the third step of assembling process according to the circumferential spacing tested next time later.
Embodiment 3: the present embodiment is a kind of compressor tandem cascade experimental provision, between the axial direction of adjustable tandem cascade
Away from.
Embodiment 3 only can adjust the axial position of frontal lobe difference from example 1 is that rear leaf position is fixed, therefore
Rear leaf sliding block 4 and rear knot block 12 is omitted.Top grating 1 and lower grid plate 2 do not have pit 21 instead front vane simultaneously
Slot 23；Top grating 1 and lower grid plate 2 be not also for installing the tapped through hole 17 of holding screw.
As shown in Figure 1, a kind of compressor tandem cascade experimental provision that this implementing regulations proposes includes top grating 1, lower grid
Front vane 6, the pressure face that front vane 5, the suction surface that plate 2, frontal lobe sliding block 3, pressure face open static pressure hole open static pressure hole open static pressure hole
Rear blade 7, suction surface open the rear blade 8 of static pressure hole, the front vane 9 of accident static pressure, the rear blade 10 of accident static pressure, preceding knot
Block 11, spacing column 13.Mirror surface is symmetrical above and below section in the middle part of blade height on the whole for the present apparatus, and top grating 1 and lower grid plate 2 pass through
Screw 14 is connected with spacing column 13.One frontal lobe sliding block 3 and two frontal lobe cushion blocks 11, which are distinguished, fills top grating 1 symmetrical above and belowly
With the preceding slot 20 (as shown in Figure 3 and Figure 5) of lower grid plate 2, and by being mounted on the clamp screw of threaded hole 17 as shown in Figure 3 and Figure 5
Nail is fixed.Front vane 5, the suction surface that pressure face opens static pressure hole open the front vane 6 of static pressure hole and the frontal lobe of four accident static pressure
Piece 9 is installed between the front vane slot 22 of two pieces of frontal lobe sliding blocks 3；Rear blade 7, the suction surface that pressure face opens static pressure hole open static pressure
The rear blade 10 of the rear blade 8 in hole and four accident static pressure be installed on top grating 1 and lower grid plate 2 rear blade slot 23 it
Between.
The structure of top grating 1 is as shown in Figures 2 and 3.1 thickness 20mm of top grating, is provided with the preceding slot 20 of 11mm depth.Such as Fig. 1 institute
Show, preceding slot 20 is located at the updrift side of wind-tunnel, and the corresponding position installation frontal lobe in slot of the requirement according to experiment to axial spacing is sliding
Block 3, tandem cascade front vane row are installed on frontal lobe sliding block 3.The remaining space of preceding slot 20 is with prefabricated according to experimental program
Frontal lobe cushion block 11 is filled accurately to control the axial position of frontal lobe sliding block 3 and prevent gas leakage.In fact the size of frontal lobe cushion block 11
It determines the position of frontal lobe sliding block 3, also determines the axial spacing of tandem cascade.Grid are got through completely in the intermediate region of preceding slot 20
Plate, so that the static tube 16 of intermediate blade as shown in Figure 1 can stretch out screen in adjustable extent.In the party upstream of preceding slot 20
To there are two tapped through holes 17, for installing holding screw, to fix frontal lobe sliding block 3 and frontal lobe cushion block 11.For convenience in leaf
Installation in grid test chamber, be provided at left and right sides of top grating 1 altogether nine installation through-holes 15 for install two spacing columns 13,
The through-hole 15 that will not be interfered with test chamber is selected when installation.
The structure of lower grid plate 2 is as shown in Figure 4 and Figure 5.Lower grid plate 2 and top grating 1 mirror above and below section in the middle part of blade height
Face is symmetrical, and therefore, not repeat them here.As shown in connection with fig. 1,13 1 the first from left of spacing column of two 100mm long is right is pacified by screw 14 respectively
Mounted in 2 two sides of top grating 1 and lower grid plate, plays the role of connection, fixation and control upper lower grid plate spacing.
Frontal lobe sliding block 3 as shown in Figure 6 and Figure 7, be a cuboid, it is highly identical as the depth of preceding slot 20, circumferential size with
Preceding slot 20 is identical and constitutes clearance fit.Frontal lobe sliding block 3 circumferentially equidistantly offers the front vane slot 22 of 6 perforations, preceding
The section of blade slot 22 is consistent with front vane both ends plug and constitutes clearance fit.As shown in connection with fig. 1, four accident static pressure
Front vane 9 is installed on the leftmost side two and the slot 22 of the rightmost side two by clearance fit；Pressure face opens the front vane 5 of static pressure hole
The front vane 6 for opening static pressure hole with suction surface is installed on intermediate two slots 22 by clearance fit, and pressure face is made to open static pressure
It is opposite that the pressure face of the front vane 5 in hole and suction surface open the suction surface of front vane 6 of static pressure hole, to measure most intermediate blade channel
The blade surface static pressure of two sides.Two frontal lobe sliding blocks 3 are installed on symmetrical above and belowly in the preceding slot 20 of top grating 1 and lower grid plate 2, peace
Holding position is determined according to axial spacing needed for experiment.The front-seat blade of 100mm high be installed on above-mentioned two frontal lobe sliding block 3 it
Between, and be fixedly clamped after mounting by being mounted on the screw 14 at two 13 both ends of 100mm spacing column.
Pressure face opens the front vane 5 of static pressure hole as shown in Figure 10 and Figure 11, chord length 34.7mm, the high 100mm of leaf, import geometry
Angle is 55 degree, and outlet geometry angle is 32 degree.The part type face of blade upper and lower ends each extends over 10 millimeters of formation plugs, when assembly
The front vane slot 22 injected on frontal lobe sliding block 3 is fixed.It is equal along chord length direction respectively away from blade root 10mm and 50mm leaf eminence
It is provided with 8 static pressure holes 24 perpendicular to pressure face, diameter 0.4mm, and the cavity for being 0.8mm by blade interior diameter evenly
25 are drawn out to outside with the static tube 16 for being inserted into 25 outlet end of cavity and sealing, can measure blade surface by pressure scanning valve
Static pressure.
Suction surface opens the front vane 6 of static pressure hole as shown in Figure 12 and Figure 13, and blade profile and above-mentioned pressure face open static pressure hole
Front vane 5 it is identical, but be equably provided with 8 perpendicular to suction along chord length direction respectively away from blade root 10mm and 50mm leaf eminence
The static pressure hole 24 in face, diameter 0.4mm, and be the cavity 25 of 0.8mm and insertion 25 outlet end of cavity by blade interior diameter
And the static tube 16 sealed is drawn out to outside, can measure blade surface static pressure by pressure scanning valve.
Pressure face opens the rear blade 7 of static pressure hole as shown in Figure 14 and Figure 15, chord length 34.7mm, the high 100mm of leaf, import geometry
Angle is 38 degree, and outlet geometry angle is -8 degree.Rear blade chord length is identical as front vane, and bent angle is twice of front vane, correlative study
The chord length and bent angle for showing tandem cascade front and back leaf can show preferable performance under above-mentioned configuration.Blade upper and lower ends
Part type face each extend over 10 millimeters of formation plugs, when assembly inject the rear blade slot 23 on top grating 1 and lower grid plate 2 into
Row is fixed.8 static pressure perpendicular to pressure face are equably being provided with along chord length direction respectively away from blade root 10mm and 50mm leaf eminence
Hole 24, diameter 0.4mm, and by blade interior diameter be 0.8mm cavity 25 and insertion 25 outlet end of cavity and seal
Static tube 16 is drawn out to outside, can measure blade surface static pressure by pressure scanning valve.
Suction surface opens the rear blade 8 of static pressure hole as shown in Figure 16 and Figure 17, and blade profile and above-mentioned pressure face open static pressure hole
Rear blade 7 it is identical, but be equably provided with 8 perpendicular to suction along chord length direction respectively away from blade root 10mm and 50mm leaf eminence
The static pressure hole 24 in face, diameter 0.4mm, and be the cavity 25 of 0.8mm and insertion 25 outlet end of cavity by blade interior diameter
And the static tube 16 sealed is drawn out to outside, can measure blade surface static pressure by pressure scanning valve.
As shown in Figure 18 and Figure 19, blade profile opens the frontal lobe of static pressure hole with above-mentioned pressure face to the front vane 9 of accident static pressure
Piece 5 is identical, but does not have blade surface static pressure hole and internal cavities.
As shown in Figure 20 and Figure 21, blade profile opens the rear leaf of static pressure hole with above-mentioned pressure face to the rear blade 10 of accident static pressure
Piece 7 is identical, but does not have blade surface static pressure hole and internal cavities.
Frontal lobe cushion block 11 is a cuboid as shown in figure 22, highly identical as the depth of preceding slot 20, circumferential size and preceding slot
20 is identical and constitute clearance fit.Slot 20 is surplus before being used to fill top grating 1 and lower grid plate 2 after 3 position of frontal lobe sliding block determines
Complementary space, and fixed by the holding screw of 20 upstream side threaded hole 17 of slot before being mounted on.It will be according to preplaning before experiment
Axial spacing prepares corresponding frontal lobe cushion block 11.Frontal lobe cushion block 11 is actually played to the positioning of frontal lobe sliding block 3, fixed and reduction leakage
The effect of gas.
Spacing column 13 is highly 100mm as shown in figures 24 and 25, with blade height with high.13 both ends of spacing column are provided with
Tapped blind hole, for being connect with screw 14.As shown in Figure 1, nine installation through-holes are opened at left and right sides of top grating 1 and lower grid plate 2 altogether
15, two 13 1 the first from left of spacing column are right to be mounted on 2 two sides of top grating 1 and lower grid plate by screw 14 respectively, plays connection, fixation
And control the effect of 2 spacing of top grating 1 and lower grid plate.
The assembling process of experimental provision:
Step 1: the root end of the front vane 9 of four accident static pressure to be respectively arranged in the leftmost side of one piece of frontal lobe sliding block 3
In two and the slot 22 of the rightmost side two；Front vane 5, suction surface that pressure face opens static pressure hole are opened into the front vane 6 of static pressure hole
Root end is installed on the slot 22 of centre 2 of the frontal lobe sliding block 3, and keeps two static pressure hole measuring surface opposite.Then by another
Frontal lobe sliding block 3 is mounted on the blade tip end of above-mentioned 6 blades.
Step 2: the root end of the rear blade 10 of four accident static pressure to be respectively arranged in the leftmost side two of lower grid plate 2
In the slot 23 of the rightmost side two；Rear blade 7, suction surface that pressure face opens static pressure hole are opened to the blade root of the rear blade 8 of static pressure hole
End is installed on the slot 23 of centre 2 of lower grid plate 2, and keeps two static pressure hole measuring surface opposite.
Step 3: the whole root end frontal lobe sliding block 3 that the first step is assembled is placed in the preceding slot 20 of lower grid plate 2,
And the position of frontal lobe sliding block 3 is adjusted in slot according to the axial spacing of planning of experiments, and fill one piece or two pieces in remaining space
Prefabricated frontal lobe cushion block 11 only need to fill one piece of frontal lobe cushion block in the other end that is, if frontal lobe sliding block 3 is in one end of preceding slot 20
11, if frontal lobe sliding block 3, in the middle position of preceding slot 20, both ends need one piece of frontal lobe cushion block 11 of each filling.Finally use clamp screw
To fix frontal lobe cushion block 11 and frontal lobe sliding block 3 in two tapped through holes 17 of 20 upstream side of slot before nail is installed on.
Step 4: the entirety assembled before mobile, the root end of the frontal lobe sliding block 3 of root end and rear blade 7,8,10 is pacified
In the preceding slot 20 and rear blade slot 23 of top grating 1, and it is two pieces identical as third step in the filling of the symmetric position of preceding slot 20
Knot block 12 afterwards, to fix 11 He of frontal lobe cushion block in the tapped through hole 18 of 20 front side of slot before being finally installed on two holding screws
Frontal lobe sliding block 3.
Step 5: the both ends of two spacing columns 13 are mounted on lower grid plate 2 with screw 14 respectively and the two sides of top grating 1 lead to
Between hole 15.If spacing column 13 is interfered with test section component during subsequent installation is to test chamber, can
Select the through-hole 15 of another suitable position.
After completing according to preset axial spacing to the assembly of the experimental provision, which is installed to cascade wind tunnel examination
It tests in section and is tested.The device is removed after experiment, is needed the axial direction of tandem cascade according to next step experimental program
Spacing is adjusted.It needs to carry out experimental provision part disassembly at this time, adjust and reinstall.
The screw 14 at two 13 both ends of spacing column is unloaded first, it is sliding to blade and frontal lobe to unclamp top grating 1 and lower grid plate 2
The clamping of block 3 and rear blade 7,8,10.Since frontal lobe sliding block 3, frontal lobe cushion block 11 and the preceding slot 20 of top grating 1 and lower grid plate 2 are
Clearance fit, it is only necessary to the holding screw in 2 threaded hole 17 of top grating 1 and lower grid plate is unscrewed, it can be by top grating 1 and lower grid
Plate 2 is unloaded from 3 both ends of frontal lobe sliding block.Restart later according to the axial spacing tested next time from the third step of assembling process
Assembly.
Claims (3)
1. a kind of compressor tandem cascade experimental provision, which is characterized in that including a top grating 1 and a lower grid plate 2, two pieces
Screen is in connection parallel and adjustable in pitch, and slot 20 and pit 21 before having on the top grating 1, lower grid plate 2 is accordingly
Also same preceding slot 20 and pit 21 are provided at position；Two pieces of frontal lobe sliding blocks 3 circumferentially equidistantly open up multiple front vanes respectively
Slot 22, and be respectively arranged in the preceding slot 20 of top grating 1 and lower grid plate 2, leaf sliding block 4 is circumferentially equidistantly opened respectively after two pieces
If same number of rear blade slot 23, and be respectively arranged in the pit 21 of top grating 1 and lower grid plate 2, it is mobile in slot to slide
The axial direction or circumferential position of block, remaining space are filled and are fixed with cushion block；Tandem Blades To An Aeroengine to be tested is divided into front two rows, front-seat
The both ends of blade are respectively placed in the front vane slot 22 of frontal lobe sliding block 3, and the both ends of heel row blade are respectively placed in rear leaf sliding block 4
In rear blade slot 23, by the axial direction or circumferential position of sliding block mobile in slot before experiment, before changing tandem cascade experimental piece
The relative positional relationship of rear blade row realizes the adjustment to axial spacing and circumferential spacing.
2. a kind of compressor tandem cascade experimental provision as described in claim 1, which is characterized in that the top grating 1 is under
Screen 2 realizes connection parallel and adjustable in pitch by two spacing columns 13.
3. a kind of compressor tandem cascade experimental provision as described in claim 1, which is characterized in that the front vane slot
22 number is 4~8.
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| CN112985743B (en) * | 2021-02-25 | 2023-03-24 | 西北工业大学 | Plane cascade experimental device capable of independently adjusting installation angle |
| CN113418716A (en) * | 2021-06-05 | 2021-09-21 | 西北工业大学 | Blade cascade experimental device with adjustable blade top clearance |
| CN113418716B (en) * | 2021-06-05 | 2024-05-31 | 西北工业大学 | Blade cascade experimental device with adjustable blade top gap |
| CN114623101A (en) * | 2022-03-10 | 2022-06-14 | 北京航空航天大学 | Tandem blade with variable circumferential position |
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