CN106482929A - A kind of cover type thin-slab structure streaming tail for cutting down probe pole - Google Patents
A kind of cover type thin-slab structure streaming tail for cutting down probe pole Download PDFInfo
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- CN106482929A CN106482929A CN201611077160.1A CN201611077160A CN106482929A CN 106482929 A CN106482929 A CN 106482929A CN 201611077160 A CN201611077160 A CN 201611077160A CN 106482929 A CN106482929 A CN 106482929A
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- thin
- probe pole
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- cambered plates
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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 invention discloses a kind of cover type thin-slab structure streaming tail for cutting down probe pole, including cylindrical probe pole, probe pole circumference both sides are relatively set with two thin cambered plates, and two thin cambered plates with regard to probe pole parallel to direction of flow diameter symmetry；Along the radial direction of probe pole, the intrados of two thin cambered plates is gradually tapered up to trailing edge end from the front acies of two thin cambered plates with the distance on the probe pole face of cylinder；The angle that the line at the front acies of two thin cambered plates and probe pole center is constituted is the leading edge aperture of two thin cambered plates, and the angle of the line composition at the trailing edge end of two thin cambered plates and probe pole center is the trailing edge aperture of two thin cambered plates.The present invention utilizes cover type thin-slab structure, pole is streamed and splits into interior stream and outflow, and makes interior stream sweep along outside to separate stream after being sprayed by rear end by tapering contracting passage, and abatement probe pole streams tail, and structure is simple and is easily installed, and cost is relatively low.
Description
Technical field
The present invention relates to a kind of cover type thin-slab structure streaming tail for cutting down probe pole, belong to fluid dynamic and detect
Field.
Background technology
In fluid machinery engineering field, various complicated flow phenomenons increased difficulty for fluid test, in order to all kinds of
Convenient accurately collection experimental data in fluid test, all kinds of steady state test probes are the first-selections of experimental data sampling instrument.Surely
State test probe is fixed by the probe pole being matched with its experimental situation, and structure is simple and technology maturation, is pneumatic test
In the most frequently used test instrument.But probe and its pole enter in flow field, pole tail is inevitably to downstream flow field
Have undesirable effect, this harmful effect is especially embodied in the turbomachine of multilevel hierarchy.In turbomachine test, in order to
Weaken this impact, 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 make probe strut lengths increase, not easy to install；Import no stator when blade profile probe then no
Method uses.Therefore, the steady state test probe with column type pole remains the main test that turbomachine performance test is adopted
Instrument.
Stream the harmful effect to downstream flow field for the tail for probe pole, domestic and international researcher has done a lot of numerical simulations
And experimentation.Research finds, inserts static pressure distribution at nearly probe pole for the flow field after probe pole, axial flow velocity all has
Substantially change.When probe pole installation site is close to stator blade, the tail of stator blade due to speed relatively low and to downstream
Rotor impacts, and the impact that pole tail causes is likely more sternness, reduce the integrated testability precision of turbomachine with
Experiment credibility.The tail problem of streaming of probe pole has become as one of turbomachine test important problem.
Therefore, those skilled in the art are devoted to developing a kind of cover type thin plate knot streaming tail for cutting down probe pole
Structure, has that structure is simple, is easily installed, the features such as cost is relatively low, can effectively reduce probe pole and streams tail and downstream is flowed
The harmful effect that field is caused, thus improve measuring accuracy in hydrodynamic test for the probe.
Content of the invention
Goal of the invention：In order to overcome the deficiencies in the prior art, the present invention provides one kind to be used for cutting down probe pole
Stream the cover type thin-slab structure of tail, have that structure is simple, be easily installed, the features such as cost is relatively low, can effectively cut down probe
Pole streams the harmful effect that tail causes to downstream flow field, thus improving measuring accuracy in hydrodynamic test for the probe.
Technical scheme：For achieving the above object, the technical solution used in the present invention is：
A kind of cover type thin-slab structure streaming tail for cutting down probe pole, including cylindrical probe pole, visits
Pin pole circumference both sides are relatively set with two thin cambered plates, and two thin cambered plates with regard to probe pole parallel to direction of flow
Diameter symmetry；The thickness uniformity of two thin cambered plates, the inside and outside cambered surface of two thin cambered plates all with probe pole in
Heart diameter parallel；Along the radial direction of probe pole, the distance on the intrados of two thin cambered plates and the probe pole face of cylinder from
The front acies of two thin cambered plates is gradually reduced to trailing edge end；The front acies of two thin cambered plates and the line at probe pole center
The angle constituting is the leading edge aperture of two thin cambered plates, the line structure at the trailing edge end of two thin cambered plates and probe pole center
The angle becoming is the trailing edge aperture of two thin cambered plates.In the present invention, arc in 1% the 30% of probe pole radius for the thickness
Panel is thin cambered plate.
This structure is by being symmetrical arranged two thin arcs in uniform thickness at the probe pole circumference both sides nearly pole face of cylinder
Panel, makes the divided fluid stream that streams around probe pole be interior stream and outflow, and makes intrados and the pole cylinder of thin cambered plate
Face forms tapered channels, so that interior stream fluid stable passes through pole both sides, and ramps up at arrival pole trailing edge, from pole
Spray in the jet gap that trailing edge is formed with thin plate trailing edge.The Jetstream fluid spraying can suppress the pole rear portion face of cylinder effectively
Boundary-layer separate；Meanwhile, separate, by thin plate outside wall surface boundary-layer, the Shedding Vortex producing to be swept along, offset by interior stream Jetstream fluid,
The tail producing is obviously reduced.Additionally, Jetstream fluid acts on to the blowing of pole rear low energy fluid, accelerate whirlpool in tail
Dissipate.The comprehensive above mechanism of action, the present invention can make the strength of vortex in pole circular cylinder wake reduce, stream tail
Coverage is shunk, and reaches abatement pole and streams tail and the purpose of abatement cylinder vortex-induced vibration.
Preferably, for guaranteeing to have enough jet flows, along the trailing edge of two thin cambered plates of radial direction of probe pole
The distance on end and the probe pole face of cylinder is the 5%-10% of probe pole radius；For guaranteeing that fluid accelerates fully, plate leading edge away from
The distance of pole cylinder is usually 2-5 times away from pole cylinder distance of plate trailing edge, therefore, along the radial direction two of probe pole
The distance on the front acies of thin cambered plate and the probe pole face of cylinder is the 10%-50% of probe pole radius.
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 arranged on probe pole above it is also possible to pacify by way of rivet or welding
It is contained on the supporter of probe pole, thus forming sleeve-shaped protection probe pole.The former assembles simple and fixing steady, the latter
It is conveniently replaceable probe pole.
Preferably, when the thickness of thin cambered plate is less than 1mm it is considered to its difficulty of processing, the front acies of two thin cambered plates
Rounding process can not be carried out with trailing edge end.But when the thickness of thin cambered plate is more than 1mm, the front acies of two thin cambered plates and tail
Acies all carries out rounding process.
Preferably, in order to pole is completely covered in pole axial direction, two thin cambered plates are along the axial length of probe pole
It is not less than and need to cut down the probe pole axial length streaming tail.
Preferably, in order to not excessively increase probe pole measurement flow field in flow to length, thin along direction of flow two
The trailing edge end of cambered plate is less than the trailing edge end of probe pole.
Beneficial effect：A kind of cover type thin-slab structure streaming tail for cutting down probe pole that the present invention provides, relatively
In prior art, there is advantages below：1st, structure is simple and is easily installed, and cost is relatively low, takes up room less, and is applied to many
Plant fluid test environment；2nd, the probe pole streaming tail more no control measure of covering type thin plate is streamed tail and is significantly weakened,
Cut down pole further the unfavorable shadow in downstream flow field is reflected, may also reach up the effect of abatement cylinder vortex-induced vibration simultaneously.
Brief description
Fig. 1 be the present invention a kind of for cutting down the generalized section that probe pole streams the cover type thin-slab structure of tail；
Fig. 2 be the present invention a kind of for cutting down the side view that probe pole streams the cover type thin-slab structure of tail；
In figure includes：1st, probe pole, 2, thin cambered plate, 3, rivet, 4, leading edge aperture, 5, trailing edge aperture.
Specific embodiment
Below in conjunction with the accompanying drawings and embodiment is further described to the present invention.
It is illustrated in figure 1 a kind of cover type thin-slab structure streaming tail for cutting down probe pole, including cylindrical
Probe pole 1, the circumferential both sides of probe pole 1 are relatively set with two thin cambered plates 2, and two thin cambered plates 2 are with regard to probe pole 1
Diameter symmetry parallel to direction of flow；The thickness uniformity of two thin cambered plates 2, the inside and outside cambered surface of two thin cambered plates 2
Centerline axis parallel all with probe pole 1；Along the radial direction of probe pole 1, the intrados of two thin cambered plates 2 and probe
The distance on pole 1 face of cylinder gradually tapers up to trailing edge end from the front acies of two thin cambered plates 2；The leading edge of two thin cambered plates 2
The angle that the line at end and probe pole 1 center is constituted is the leading edge aperture 4 of two thin cambered plates 2, the tail of two thin cambered plates 2
The angle that the line at acies and probe pole 1 center is constituted is the trailing edge aperture 5 of two thin cambered plates 2.
In the present embodiment, the radius of probe pole 1 is 5mm, and axial length is 50mm；The thickness of thin cambered plate 2 is
1mm, two thin cambered plates 2 are the ingredient of elliptic cylinder.
In the present embodiment, along the radial direction of probe pole 1, the trailing edge end of two thin cambered plates 2 and probe pole 1 cylinder
The distance in face is 0.5mm；Along the radial direction of probe pole 1, the front acies of two thin cambered plates 2 and probe pole 1 face of cylinder
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 free upper, middle and lower three row's rivet 3 of two thin cambered plates 2 is fixed on probe pole 1, rivet 3
Be located at respectively probe pole 1 axial length 0.5,25, at 49.5mm；Rivet 3 radius is 0.5mm, and rivet 3 is fixed on probe pole 1 and hangs down
Directly on the diameter place cylinder of direction of flow.
In the present embodiment, two thin cambered plates 2 are 50mm along the length of probe pole 1 axial direction, the stream of two thin cambered plates 2
Be 11.58mm to chord length, and along two thin cambered plates 2 of direction of flow trailing edge end be less than probe pole 1 trailing edge end.
In the present embodiment, probe pole 1 is the steady state pressure test probe being arranged in aero-engine compressor entrance
Pole 1 and apart from 0.5-1.5 times of blade of blade inlet edge axial direction chord length.
In the present invention, the thickness of described thin cambered plate 2 is in 1% the 30% of probe pole 1 radius.
The present invention passes through, in probe pole 1 both sides mounting cup type thin-slab structure, to shunt peripheral flow fluid, make thin plate inwall
Face and pole wall form tapered runner, make interior stream fluid stable pass through pole both sides, and ramp up at arrival pole trailing edge,
Spray in the jet gap being formed by pole trailing edge and thin plate, blow down the low energy fluid at pole rear and sweep along to separating whirlpool generation
Effect, efficiently reduces probe pole 1 and streams tail.
In the present invention, described steady state test probe includes pressure steady state test probe and temperature steady state test probe；Described
Fluid working substance is gas, liquid or heterogeneous fluid.
Under the premise of ensureing thin plate intensity, plate thickness is as far as possible thin, reduces the blocking shadow that the thickness stream field of plate itself produces
Ring.When the thickness of thin cambered plate 2 is more than 1mm, the front acies of two thin cambered plates 2 and trailing edge end all carry out rounding process.
In the present invention, the inside and outside wall of two thin cambered plates 2 is smooth arc-shaped surface it is ensured that interior stream stably passes through contractive set
Road；Two thin cambered plates 2 typically select metal material, make cambered plate as far as possible frivolous premised on proof strength；Described thin plate arc
Face can be certain for axially upper and pole half-breadth, the cylinder with the change of pole half-breadth in circumference, and its baseline can be selected for ellipse
The composite curve of circular arc, ellipse and circular arc, parabola and high order fitting curve etc..
In the present invention, the mounting means of two thin cambered plates 2 and installation site are determined by being test for turbomachine test request
Fixed.
The above be only the preferred embodiment of the present invention it should be pointed out that：Ordinary skill people for the art
For member, under the premise without departing from the principles of the invention, some improvements and modifications can also be made, these improvements and modifications also should
It is considered as protection scope of the present invention.
Claims (7)
1. a kind of stream the cover type thin-slab structure of tail it is characterised in that including cylindrical spy for cutting down probe pole
Pin pole (1), probe pole (1) circumference both sides are relatively set with two thin cambered plates (2), and two thin cambered plates (2) with regard to
Probe pole (1) is parallel to the diameter symmetry of direction of flow；The thickness uniformity of two thin cambered plates (2), two thin cambered surfaces
The centerline axis parallel all with probe pole (1) for the inside and outside cambered surface of plate (2)；Along the radial direction of probe pole (1), two thin
The distance on the intrados of cambered plate (2) and probe pole (1) face of cylinder from the front acies of two thin cambered plates (2) to trailing edge end by
Decrescence little；The front acies of two thin cambered plates (2) is two thin cambered plates with the angle of the line composition at probe pole (1) center
(2) leading edge aperture (4), the trailing edge end of two thin cambered plates (2) is two with the angle of the line composition at probe pole (1) center
The trailing edge aperture (5) of individual thin cambered plate (2).
2. a kind of cover type thin-slab structure streaming tail for cutting down probe pole according to claim 1, its feature exists
In along the radial direction of probe pole (1), the trailing edge end of two thin cambered plates (2) and the distance on probe pole (1) face of cylinder are
The 5%-10% of probe pole (1) radius；Along the radial direction of probe pole (1), the front acies of two thin cambered plates (2) and spy
The distance on pin pole (1) face of cylinder is the 10%-50% of probe pole (1) radius.
3. a kind of cover type thin-slab structure streaming tail for cutting down probe pole according to claim 1, its feature exists
In the leading edge aperture (4) of two thin cambered plates (2) is 40-80 degree, and trailing edge aperture (5) is 50-80 degree.
4. a kind of cover type thin-slab structure streaming tail for cutting down probe pole according to claim 1, its feature exists
In two thin cambered plates (2) are arranged on probe pole (1) by way of rivet (3) or welding.
5. a kind of cover type thin-slab structure streaming tail for cutting down probe pole according to claim 1, its feature exists
In when the thickness of thin cambered plate (2) is more than 1mm, the front acies of two thin cambered plates (2) and trailing edge end are all carried out at rounding
Reason.
6. a kind of cover type thin-slab structure streaming tail for cutting down probe pole according to claim 1, its feature exists
In two thin cambered plates (2) are not less than along the axial length of probe pole (1) need to cut down the probe pole (1) streaming tail
Axial length.
7. a kind of cover type thin-slab structure streaming tail for cutting down probe pole according to claim 1, its feature exists
In, along two thin cambered plates (2) of direction of flow trailing edge end be less than probe pole (1) trailing edge end.
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 |
Applications Claiming Priority (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 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106482929A true CN106482929A (en) | 2017-03-08 |
| CN106482929B CN106482929B (en) | 2018-08-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611077160.1A Active 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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| Country | Link |
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| CN (1) | CN106482929B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109374472A (en) * | 2018-11-21 | 2019-02-22 | 环境保护部华南环境科学研究所 | A kind of peripheral flow gas-liquid intersection removing airborne particulate suspended matter imitative experiment platform |
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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 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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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 |
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| 吴森林 等: "小型探针在小尺寸压气机性能试验中的应用", 《燃气涡轮试验与研究》 * |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109374472A (en) * | 2018-11-21 | 2019-02-22 | 环境保护部华南环境科学研究所 | A kind of peripheral flow gas-liquid intersection removing airborne particulate suspended matter imitative experiment platform |
| 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 |
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| Publication number | Publication date |
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| CN106482929B (en) | 2018-08-28 |
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