CN106482929B - It is a kind of to be used to cut down the cover type thin-slab structure that probe strut streams tail - Google Patents
It is a kind of to be used to cut down the cover type thin-slab structure that probe strut streams tail Download PDFInfo
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- CN106482929B CN106482929B CN201611077160.1A CN201611077160A CN106482929B CN 106482929 B CN106482929 B CN 106482929B CN 201611077160 A CN201611077160 A CN 201611077160A CN 106482929 B CN106482929 B CN 106482929B
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- 239000000523 sample Substances 0.000 title claims abstract description 107
- 230000004323 axial length Effects 0.000 claims description 5
- 238000003466 welding Methods 0.000 claims description 2
- 238000000926 separation method Methods 0.000 abstract description 4
- 238000012360 testing method Methods 0.000 description 19
- 239000012530 fluid Substances 0.000 description 17
- 230000009931 harmful effect Effects 0.000 description 5
- 230000000694 effects Effects 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 238000013461 design Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000035800 maturation Effects 0.000 description 1
- 230000010534 mechanism of action Effects 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
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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
- G01M10/00—Hydrodynamic testing; Arrangements in or on ship-testing tanks or water tunnels
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Abstract
The cover type thin-slab structure that the invention discloses a kind of to stream tail for cutting down probe strut, including cylindrical probe strut, probe strut circumferential direction both sides are oppositely arranged there are two thin cambered plate, and two thin cambered plates are parallel to the diameter symmetry of direction of flow about probe strut；Along the radial direction of probe strut, the intrados of two thin cambered plates is gradually tapered up from the preceding acies of two thin cambered plates to trailing edge end at a distance from probe strut cylindrical surface；The angle that the preceding acies of two thin cambered plates is constituted with the line at probe strut center is the leading edge aperture of two thin cambered plates, and the angle that the trailing edge end of two thin cambered plates is constituted with the line at probe strut center is the trailing edge aperture of two thin cambered plates.The present invention utilizes cover type thin-slab structure, and strut is streamed and splits into interior stream and outflow, and sweeps along outside separation to flow after so that interior stream is sprayed by rear end by tapering contracting channel, cuts down probe strut and streams tail, simple in structure and be easily installed, and cost is relatively low.
Description
Technical field
The cover type thin-slab structure that the present invention relates to a kind of to stream tail for cutting down probe strut belongs to fluid dynamic detection
Field.
Background technology
It is that fluid test increases difficulty in the flow phenomenon of fluid machinery engineering field, various complexity, in order to all kinds of
Convenient in fluid test accurately to acquire experimental data, all kinds of steady state test probes are the first choices of experimental data sampling instrument.Surely
State test probe is fixed by the probe strut to match with its experimental situation, and simple in structure and technology maturation is pneumatically to test
In most common test instrument.But probe and its strut enter in flow field, strut tail is inevitably to downstream flow field
Harmful effect, this harmful effect is caused especially to be embodied in the turbomachine of multilevel hierarchy.In turbomachine test, in order to
Weaken this influence, domestic and international researcher is proposed strut type face and set using blade profile probe etc. using on airflow design, stator
Meter method.However, airflow design can be such that probe strut lengths increase, it is not easy to install；When import is without guide vane blade profile probe then without
Method uses.Therefore, the steady state test probe with cylindrical type strut is still main test used by turbomachine performance test
Tool.
Harmful effect of the tail to downstream flow field is streamed for probe strut, domestic and international researcher has done many numerical simulations
And experimental study.The study found that static pressure distribution of the flow field at nearly probe strut being inserted into after probe strut, axial flow velocity have
It substantially change.When probe strut installation site is close to stator blade, the tail of stator blade due to speed it is relatively low and to downstream
Rotor impacts, and influences to be likely more sternness caused by strut tail, reduce the integrated testability precision of turbomachine with
Test confidence level.Probe strut stream tail problem have become turbomachine test in an important problem.
Therefore, those skilled in the art are dedicated to developing a kind of for cutting down the cover type thin plate knot that probe strut streams tail
Structure, have the characteristics that it is simple in structure, be easily installed, cost it is relatively low, can effectively reduce probe strut stream tail to downstream flow
Harmful effect caused by, to improve measuring accuracy of the probe in hydrodynamic test.
Invention content
Goal of the invention：In order to overcome the deficiencies in the prior art, the present invention to provide a kind of for cutting down probe strut
The cover type thin-slab structure for streaming tail, have the characteristics that it is simple in structure, be easily installed, cost it is relatively low, can effectively cut down probe
Strut streams tail harmful effect caused by the flow field of downstream, to improve measuring accuracy of the probe in hydrodynamic test.
Technical solution：To achieve the above object, the technical solution adopted by the present invention is：
It is a kind of to be used to cut down the cover type thin-slab structure that probe strut streams tail, including cylindrical probe strut, it visits
Needle strut circumferential direction both sides are arranged symmetrically, and there are two thin cambered plates, and direction of flow is parallel with the plane of symmetry of thin cambered plate；It is two thin
The thickness uniformity of cambered plate, the centerline axis parallel of the inside and outside cambered surfaces of two thin cambered plates with probe strut；Along probe
The radial direction of strut, the intrados of two thin cambered plates is at a distance from probe strut cylindrical surface from the leading edge of two thin cambered plates
It holds to trailing edge end and is gradually reduced；The angle that the preceding acies of two thin cambered plates and the line at probe strut center are constituted is two thin
The leading edge aperture of cambered plate, the angle that the trailing edge end of two thin cambered plates is constituted with the line at probe strut center is two thin arcs
The trailing edge aperture of panel.In the present invention, cambered plate of the thickness in the 1% -30% of probe strut radius is thin cambered plate.
The structure at the nearly strut cylindrical surface in probe strut circumferential direction both sides by being symmetrical arranged two thin arcs in homogeneous thickness
Panel, it is interior stream and outflow to make the divided fluid stream that streams around probe strut, and makes the intrados and strut cylinder of thin cambered plate
Face forms tapered channels, to make interior stream fluid stable pass through strut both sides, and ramps up and reaches at strut trailing edge, from strut
It is sprayed in the jet stream gap that trailing edge is formed with thin plate trailing edge.The Jetstream fluid of ejection can effectively inhibit strut rear portion cylindrical surface
Boundary-layer separation；Meanwhile the Shedding Vortex generated by the separation of thin plate outside wall surface boundary-layer is swept along by interior stream Jetstream fluid, is offset,
The tail of generation is obviously reduced.In addition, Jetstream fluid acts on the blowing of strut rear low energy fluid, whirlpool in tail is accelerated
It dissipates.In summary the mechanism of action, the present invention can be such that the vortex intensity in strut circular cylinder wake reduces, stream tail
Coverage is shunk, and achievees the purpose that cutting down strut streams tail and abatement cylinder vortex-induced vibration.
Preferably, to ensure the jet flow for having enough, along the trailing edge of two thin cambered plates of radial direction of probe strut
Hold the 5%-10% for probe strut radius at a distance from probe strut cylindrical surface；To ensure that it is abundant that fluid accelerates, plate leading edge away from
The distance of strut cylinder is usually 2-5 times of plate trailing edge away from strut cylinder distance, therefore, along the radial direction two of probe strut
The preceding acies of thin cambered plate is the 10%-50% of probe strut radius at a distance from probe strut cylindrical surface.
Preferably, the leading edge aperture of two thin cambered plates is 40-80 degree, and trailing edge aperture is 50-80 degree.
Preferably, two thin cambered plates can be mounted on by way of rivet or welding on probe strut, can also be pacified
On the supporter of probe strut, probe strut is protected to form sleeve-shaped.The former assembles simple and fixed steady, the latter
It is conveniently replaceable probe strut.
Preferably, when the thickness of thin cambered plate is less than 1mm, consider its difficulty of processing, the preceding acies of two thin cambered plates
It can be handled without rounded corner with trailing edge end.But when the thickness of thin cambered plate is more than 1mm, the preceding acies and tail of two thin cambered plates
Acies carries out rounded corner processing.
Preferably, in order to strut, length of two thin cambered plates along probe strut axial direction are completely covered in strut axial direction
Not less than the probe strut axial length for streaming tail need to be cut down.
Preferably, length is flowed in measuring flow field in order not to excessively increase probe strut, it is two thin along direction of flow
The trailing edge end of cambered plate is no more than the trailing edge end of probe strut.
Advantageous effect：It is provided by the invention a kind of for cutting down the cover type thin-slab structure that probe strut streams tail, relatively
In the prior art, has the following advantages：1, simple in structure and be easily installed, cost is relatively low, and occupied space is smaller, and suitable for more
Kind fluid test environment；2, the tail that streams of covering type thin plate streams tail compared with the probe strut of no control measure and substantially weakens,
Further cut down strut to reflect the unfavorable shadow in downstream flow field, while may also reach up the effect of abatement cylinder vortex-induced vibration.
Description of the drawings
Fig. 1 is a kind of diagrammatic cross-section for streaming the cover type thin-slab structure of tail for cutting down probe strut of the present invention；
Fig. 2 is a kind of side view streaming the cover type thin-slab structure of tail for cutting down probe strut of the present invention；
Figure includes：1, probe strut, 2, thin cambered plate, 3, rivet, 4, leading edge aperture, 5, trailing edge aperture.
Specific implementation mode
The present invention is further described with reference to the accompanying drawings and embodiments.
It is used to cut down the cover type thin-slab structure that probe strut streams tail to be a kind of as shown in Figure 1, including cylindrical
Probe strut 1, the circumferential both sides of probe strut 1 are symmetrical arranged that there are two thin cambered plates 2, and pair of direction of flow and thin cambered plate 2
Title face is parallel；The thickness uniformity of two thin cambered plates 2, the inside and outside cambered surfaces of two thin cambered plates 2 with probe strut 1
Centerline axis parallel；Along the radial direction of probe strut 1, the intrados of two thin cambered plates 2 and 1 cylindrical surface of probe strut away from
It is gradually tapered up to trailing edge end from from the preceding acies of two thin cambered plates 2；In the preceding acies and probe strut 1 of two thin cambered plates 2
The angle that the line of the heart is constituted is the leading edge aperture 4 of two thin cambered plates 2, trailing edge end and the probe strut 1 of two thin cambered plates 2
The angle that the line at center is constituted is the trailing edge aperture 5 of two thin cambered plates 2.
In the present embodiment, the radius of probe strut 1 is 5mm, axial length 50mm；The thickness of thin cambered plate 2 is
1mm, two thin cambered plates 2 are the component part of elliptic cylinder.
In the present embodiment, along the radial direction of probe strut 1, trailing edge end and 1 cylinder of probe strut of two thin cambered plates 2
The distance in face is 0.5mm；Along the radial direction of probe strut 1, preceding acies and 1 cylindrical surface of probe strut of two thin cambered plates 2
Distance be 1.63mm.
In the present embodiment, the leading edge aperture 4 of two thin cambered plates 2 is 49.84 degree, and trailing edge aperture 5 is 70.64 degree.
In the present embodiment, each three row's rivet 3 of free upper, middle and lower of two thin cambered plates 2 is fixed on probe strut 1, rivet 3
Be located at 1 axial length 0.5 of probe strut, 25, at 49.5mm；3 radius of rivet is 0.5mm, and rivet 3 is fixed on probe strut 1 and hangs down
Directly where the diameter of direction of flow on cylinder.
In the present embodiment, two thin cambered plates 2 are 50mm, the stream of two thin cambered plates 2 along the axial length of probe strut 1
It is 11.58mm to chord length, and is no more than the trailing edge end of probe strut 1 along the trailing edge end of two thin cambered plates 2 of direction of flow.
In the present embodiment, probe strut 1 is the steady state pressure test probe for being arranged in aero-engine compressor entrance
Strut 1 and apart from 0.5-1.5 times of blade axial direction chord length of blade inlet edge.
In the present invention, the thickness of the thin cambered plate 2 is in the 1% -30% of 1 radius of probe strut.
The present invention is by 1 both sides mounting cup type thin-slab structure of probe strut, shunting peripheral flow fluid, making thin plate inner wall
Face forms tapered runner with strut wall surface, and interior stream fluid stable is made to pass through strut both sides, and ramps up and reach at strut trailing edge,
It is sprayed in the jet stream gap formed with thin plate by strut trailing edge, blow down the low energy fluid at strut rear and separation vortex generation is swept along
Effect, efficiently reduces probe strut 1 and streams tail.
In the present invention, the steady state test probe includes pressure steady state test probe and temperature steady state test probe；It is described
Fluid working substance is gas, liquid or heterogeneous fluid.
Under the premise of ensureing thin plate intensity, plate thickness is thin as possible, reduces the blocking shadow that the thickness stream field of plate itself generates
It rings.When the thickness of thin cambered plate 2 is more than 1mm, the preceding acies of two thin cambered plates 2 and trailing edge end carry out rounded corner processing.
The inside and outside wall surface of two thin cambered plates 2 is smooth arc-shaped surface in the present invention, ensures that interior stream stabilization passes through contractive set
Road；Two thin cambered plates 2 generally select metal material, keep cambered plate frivolous as possible premised on proof strength；The thin plate arc
Face can be axial upper certain with strut half-breadth, and with the cylinder of strut half-breadth variation in circumferential direction, baseline can be selected ellipse
Circular arc, oval composite curve, parabola and high order fitting curve etc. with circular arc.
The mounting means of two thin cambered plates 2 and installation site are determined by tested turbomachine test request in the present invention
It is fixed.
The above is only a preferred embodiment of the present invention, it should be pointed out that：For the ordinary skill people of the art
For member, various improvements and modifications may be made without departing from the principle of the present invention, these improvements and modifications are also answered
It is considered as protection scope of the present invention.
Claims (7)
1. a kind of for cutting down the cover type thin-slab structure that probe strut streams tail, which is characterized in that including cylindrical spy
Needle strut (1), probe strut (1) circumferential direction both sides are symmetrical arranged there are two thin cambered plate (2), and direction of flow and thin cambered plate
(2) the plane of symmetry is parallel；The thickness uniformity of two thin cambered plate (2), the inside and outside cambered surface of two thin cambered plate (2) with
The centerline axis parallel of probe strut (1)；Radial direction along probe strut (1), the intrados of two thin cambered plate (2) and spy
The distance on needle strut (1) cylindrical surface is gradually reduced from the preceding acies of two thin cambered plate (2) to trailing edge end；Two thin cambered plates
(2) preceding acies and the leading edge aperture (4) that the angle of the line composition at probe strut (1) center is two thin cambered plate (2), two
The angle that the trailing edge end of a thin cambered plate (2) is constituted with the line at probe strut (1) center is the trailing edge of two thin cambered plate (2)
Aperture (5).
2. according to claim 1 a kind of for cutting down the cover type thin-slab structure that probe strut streams tail, feature exists
In the trailing edge end of the radial direction along probe strut (1), two thin cambered plate (2) is at a distance from probe strut (1) cylindrical surface
The 5%-10% of probe strut (1) radius；Radial direction along probe strut (1), preceding acies and the spy of two thin cambered plate (2)
The distance on needle strut (1) cylindrical surface is the 10%-50% of probe strut (1) radius.
3. according to claim 1 a kind of for cutting down the cover type thin-slab structure that probe strut streams tail, feature exists
In the leading edge aperture (4) of two thin cambered plate (2) is 40-80 degree, and trailing edge aperture (5) is 50-80 degree.
4. according to claim 1 a kind of for cutting down the cover type thin-slab structure that probe strut streams tail, feature exists
In two thin cambered plate (2) is mounted on by way of rivet (3) or welding on probe strut (1).
5. according to claim 1 a kind of for cutting down the cover type thin-slab structure that probe strut streams tail, feature exists
In when the thickness of thin cambered plate (2) is more than 1mm, the preceding acies of two thin cambered plate (2) and trailing edge end carry out at rounded corner
Reason.
6. according to claim 1 a kind of for cutting down the cover type thin-slab structure that probe strut streams tail, feature exists
In two thin cambered plate (2) is not less than along the length of probe strut (1) axial direction need to cut down the probe strut (1) for streaming tail
Axial length.
7. according to claim 1 a kind of for cutting down the cover type thin-slab structure that probe strut streams tail, feature exists
In the trailing edge end along the trailing edge end of the two thin cambered plate (2) of direction of flow no more than probe strut (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611077160.1A CN106482929B (en) | 2016-11-30 | 2016-11-30 | It is a kind of to be used to cut down the cover type thin-slab structure that probe strut streams tail |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611077160.1A CN106482929B (en) | 2016-11-30 | 2016-11-30 | It is a kind of to be used to cut down the cover type thin-slab structure that probe strut streams tail |
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| Publication Number | Publication Date |
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| CN106482929A CN106482929A (en) | 2017-03-08 |
| CN106482929B true CN106482929B (en) | 2018-08-28 |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109374472B (en) * | 2018-11-21 | 2023-11-14 | 环境保护部华南环境科学研究所 | Experimental simulation platform for cross removal of atmospheric particle suspended matters by cylindrical flow-around gas-liquid |
Citations (2)
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|---|---|---|---|---|
| DE202005018060U1 (en) * | 2005-11-18 | 2006-03-02 | Dipl.-Ing. H. Schulz Hds Hydraulik Gmbh & Co. Kg | Connection fitting of a test device for hose assemblies with hose fittings |
| CN103640700A (en) * | 2013-12-13 | 2014-03-19 | 江苏大学 | Anti-drifting nozzle device for spraying of fixed wing aircraft |
-
2016
- 2016-11-30 CN CN201611077160.1A patent/CN106482929B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE202005018060U1 (en) * | 2005-11-18 | 2006-03-02 | Dipl.-Ing. H. Schulz Hds Hydraulik Gmbh & Co. Kg | Connection fitting of a test device for hose assemblies with hose fittings |
| CN103640700A (en) * | 2013-12-13 | 2014-03-19 | 江苏大学 | Anti-drifting nozzle device for spraying of fixed wing aircraft |
Non-Patent Citations (4)
| Title |
|---|
| 7孔复合探针在平面叶栅流场测量中的应用;王东 等;《航空发动机》;20160630;第42卷(第3期);第67-73页 * |
| 亚声速扩压平面叶栅尾迹动态压力场测量与分析;幸晓龙 等;《燃气涡轮试验与研究》;20141231;第27卷(第6期);第13-17页 * |
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