CN102288785A - Sensor for testing flow field direction - Google Patents
Sensor for testing flow field direction Download PDFInfo
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- CN102288785A CN102288785A CN 201110190840 CN201110190840A CN102288785A CN 102288785 A CN102288785 A CN 102288785A CN 201110190840 CN201110190840 CN 201110190840 CN 201110190840 A CN201110190840 A CN 201110190840A CN 102288785 A CN102288785 A CN 102288785A
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- stagnation pressure
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- pick
- flow field
- pipe
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Abstract
The invention provides a sensor for testing a flow field direction, which comprises a main pressure tube (1), a supporting tube (2), a main pressure lead tube (3) and a connecting nozzle (5), wherein a first end and a second end of the main pressure lead tube (3) are respectively connected with the supporting tube (2) and the connecting nozzle (5), the main pressure tube (1) is accommodated in the supporting tube (2) and is connected with the first end of the main pressure lead tube (3), the main pressure tube (1) consists of two branch pressure tubes (11) with the same shape and structure and arranged side by side, a windward end of each branch pressure tube (11) is processed into a sharp wedge shape, and the sharp wedge-shaped windward ends of the two branch pressure tubes (11) constitute a taper angle type windward head (114) of the main pressure tube (1). The invention solves the technical problems of large interference, instability and large measurement errors when the existing sensor is used for testing the flow field direction, and the sensor disclosed by the invention is widely applied for measuring the direction of airflow in a calibration wind tunnel.
Description
Technical field
The present invention relates to the flow field direction field tests, especially, relate to a kind of pick-up of testing the subcritical flow field direction.
Background technology
At present, the main pick-up that adopts of the aerodynamic parameter of engine complete machine and parts measurement is both at home and abroad directly measured.This method has simply, reliable, the higher characteristics of precision.Must be before various pick-ups use through the calibration of calibration wind tunnel, calibration wind tunnel can provide uniform, stable air velocity distribution.As the field of direction of calibration wind tunnel standard, the airflow direction of calibration wind tunnel outlet is vertical with vents face in theory, but in fact has departing from of a little, therefore need detect the field of direction.For the field of direction of calibration wind tunnel, the current three hole direction pick-ups that use are measured more, and three hole direction pick-ups are owing to adopt three pore structures, and its front face area is relatively large, and its interference to Flow Field in Wind Tunnel is very big, has increased the blockage effect of pick-up.On the other hand, the three hole pipe fittings of direction pick-up own are more, and the structure heaviness when test, can produce jitter phenomenon after the wind-tunnel Mach number reaches 0.6, has increased the measuring error of flow field direction.
Summary of the invention
The object of the invention is to provide a kind of simple in structure, good stability, flow field direction pick-up that measuring error is little, disturbs the technical matters big, unstable, that measuring error is big to solve existing pick-up.
For achieving the above object, the invention provides a kind of test flow field direction pick-up, comprise stagnation pressure tube, stay pipe, stagnation pressure skirt and connect mouth, first end of stagnation pressure skirt is connected stay pipe respectively and connects mouth with second end, stagnation pressure tube is contained in the stay pipe, and is connected with first end of stagnation pressure skirt, and stagnation pressure tube comprises two branch pressure pipes that are arranged side by side, the windward side of every branch pressure pipe is processed into glut shape, the cone angle type that the glut shape windward side of two branch pressure pipes the constitutes stagnation pressure tube jointly head that facings the wind.
Further, each branch pressure pipe comprises tilting section, horizontal segment and vertical section; Tilting section is that the bending extension formed after the branch pressure pipe was stretched out stay pipe; Horizontal segment forms for being extended by tilting section, and parallel with stay pipe; Vertical section forms for being extended by horizontal segment, and vertical with horizontal segment.
Further, also add clamped plate, add the clamped plate that adds that three sides of clamped plate fixedly connected with tilting section, horizontal segment and stay pipe respectively.
Further, the cone angle type of stagnation pressure tube head down with the wind is an isosceles triangle at the cross sectional shape of two dividing potential drop tube's axis line directions, and the drift angle size of this isoceles triangle shape is 10 °～45 °.
Further, first end of being connected of first end of stay pipe and stagnation pressure skirt, stagnation pressure tube and stagnation pressure skirt be connected and second end of stagnation pressure skirt with connect being connected to of mouth and fixedly connected.
Further, first end of stay pipe and stagnation pressure skirt be connected and first end of stagnation pressure tube and stagnation pressure skirt be connected to telescopic flexible connection.
Further, two fens pressure pipes are fixed on the inwall of stay pipe.
Further, the internal diameter of each branch pressure pipe is 0.5～1.5mm, and the wall thickness of branch pressure pipe is 0.1～0.3mm.
Further, stagnation pressure tube, stay pipe, stagnation pressure skirt, to add clamped plate and connect mouth be that stainless steel, high-strength aluminum alloy, almag or titanium alloy are processed into.
The present invention has following beneficial effect:
1, the stagnation pressure tube of pick-up of the present invention is made up of two branch pressure pipes, is in charge of than three of existing pick-up and has reduced the number of components, makes the deadweight of pick-up alleviate greatly, has strengthened the stability of pick-up.
2, the stagnation pressure tube of the pick-up of the present invention head that facings the wind is processed into the cone angle type, has reduced the front face area of stagnation pressure tube greatly, compares the measuring accuracy of 0.5 ° of existing pick-up, and the measuring accuracy of pick-up of the present invention reaches 0.1 °, makes measuring accuracy improve a class.
3, the stagnation pressure tube of pick-up of the present invention processing embayment folding shape, pipe fitting turning are compared the right angle folding shape of existing pick-up away from the stagnation pressure tube head that facings the wind, and when test, have reduced the blockage effect of pick-up greatly, have reduced the interference of pick-up to Flow Field in Wind Tunnel.
Except purpose described above, feature and advantage, the present invention also has other purpose, feature and advantage.With reference to figure, the present invention is further detailed explanation below.
Description of drawings
The accompanying drawing that constitutes the application's a part is used to provide further understanding of the present invention, and illustrative examples of the present invention and explanation thereof are used to explain the present invention, do not constitute improper qualification of the present invention.
Fig. 1 is the flow field direction pick-up front view synoptic diagram of the embodiment of the invention; And
Fig. 2 is a schematic cross-section that facings the wind of the stagnation pressure tube of the embodiment of the invention.
Embodiment
Below in conjunction with accompanying drawing embodiments of the invention are elaborated, but the multitude of different ways that the present invention can be defined by the claims and cover is implemented.
Referring to Fig. 1, Fig. 2, a kind of pick-up of testing flow field direction comprises: stagnation pressure tube 1, stay pipe 2, stagnation pressure skirt 3, add clamped plate 4 and connect mouth 5.
Stay pipe 2 is fixedlyed connected with first end of stagnation pressure skirt 3.This connected mode can or be threaded for welding, clamping.Second end of stagnation pressure skirt 3 with connect mouth 5 and be connected, this connects mouth 5 and connects mouth for turriform.This connected mode is welding.Second end of stagnation pressure skirt 3 and connect between the mouth 5 and can also comprise a bit of connecting pipe.
Referring to Fig. 2, the windward side of each branch pressure pipe 11 is processed into glut shape, and the glut shape windward side of two branch pressure pipes 11 is provided with back-to-back, and the cone angle type that constitutes stagnation pressure tube 1 facings the wind 114.The cone angle type of stagnation pressure tube 1 114 cross sectional shape in two dividing potential drop tube's axis line directions down with the wind is an isosceles triangle, promptly use by the plane of two dividing potential drop tube's axis and dissect stagnation pressure tube, facing the wind 114 the isosceles triangle that is shaped as of the cone angle type that obtains, the drift angle size of this isoceles triangle shape is 10 °～45 °.What the cone angle type was set facings the wind 114, has reduced the front face area of stagnation pressure tube 1 greatly, has improved the measuring accuracy of this pick-up greatly, facing the wind 114 in present embodiment the preferred cone angle angle be 15 °.Experiment shows that when angle of taper was set to 15 °, the precision of this pick-up when measuring flow field direction can reach 0.1 °, compares the measuring accuracy of 0.5 ° of three hole pick-up, and qualitative leap is arranged.As other embodiment, this angle of taper can be 10 °, 20 °, 30 °, 45 °.
The internal diameter of two fens pressure pipes 11 is respectively 0.7mm, and wall thickness is 0.15mm.Because the caliber of stagnation pressure tube 1 is very little and tube wall is thinner, even the very big material of working strength in the time of in being placed on High Speed Flow Field, can taking place acutely to rock and wave.Therefore, the present invention will constitute two fens pressure pipes 11 of stagnation pressure tube 1 and pass stay pipe 2, and be fixed together with stay pipe 2, can strengthen the stability of pick-up greatly.
Be set with near a side of tilting section 111, horizontal segment 112 and the stay pipe 2 of minute pressure pipe 11 and add clamped plate 4.A side that adds clamped plate 4 comprise the tilting section that tilts to extend with first horizontal segment of horizontal segment 112 solid weldings, by horizontal segment and by tilting section that extend with second horizontal segments stay pipe 2 solid weldings.Tilting section 111 solid weldings of the tilting section of gusset plate 4 and branch pressure pipe 11 together.The thickness that adds clamped plate 4 is consistent with the external diameter size sum of two fens pressure pipes 11, perhaps is slightly less than the external diameter size sum of two fens pressure pipes 11.The stagnation pressure tube 1 of above-mentioned shape is set, makes at the pipe fitting turning and to facing the wind 114, compare the right angle folding shape of existing pick-up, when test, reduced the blockage effect of pick-up greatly, reduced the interference of pick-up Flow Field in Wind Tunnel away from stagnation pressure tube.Equally, owing to divide pressure pipe caliber and wall thickness all less, therefore, add clamped plate 4, strengthened the stability of stagnation pressure tube 1 greatly, prevent from that pick-up from shaking to wave in test process in a side setting of the projection of stagnation pressure tube 1.
The building block of flow field direction pick-up of the present invention: stagnation pressure tube 1, stay pipe 2, stagnation pressure skirt 3, the material that adds clamped plate 4 and connect mouth 5 are stainless steel.
As other embodiments of the invention, the internal diameter that constitutes two fens pressure pipes 11 of stagnation pressure tube 1 can be chosen in 0.5～1.5mm scope according to experiment or industrial requirements, and wall thickness can be 0.1～0.3mm.
As additional embodiments, stagnation pressure tube 1 of the present invention also can be at two through holes side by side of the center of a circular rod member or oval rod member processing, as the branch pressure pipe 11 of this pick-up.Like this, compare by two fens pressure pipes 11 and weld together the stagnation pressure tube 1 that constitutes, its stability and globality are better.
As additional embodiments, the material of making each building block of pick-up can be high-strength aluminum alloy, almag or titanium alloy.
Another embodiment of the present invention, the stay pipe 2 of pick-up of the present invention and the telescopic flexible connection that is connected to of stagnation pressure skirt 3, stagnation pressure tube 1 and stagnation pressure skirt 3, this each connecting portion is provided with O-ring seal or sealing strip, make and to move mutually between stay pipe 2 and stagnation pressure skirt 3, stagnation pressure tube 1 and the stagnation pressure skirt 3, according to different needs, can freely determine the length of pick-up like this.
The above is the preferred embodiments of the present invention only, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.Within the spirit and principles in the present invention all, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (8)
1. pick-up of testing flow field direction, comprise: stagnation pressure tube (1), stay pipe (2), stagnation pressure skirt (3) and connect mouth (5), first end of described stagnation pressure skirt (3) is connected described stay pipe (2) and the described mouth (5) that connects respectively with second end, described stagnation pressure tube (1) is contained in the described stay pipe (2), and be connected with first end of described stagnation pressure skirt (3), it is characterized in that, described stagnation pressure tube (1) comprises two branch pressure pipes (11) that are arranged side by side, every described minute pressure pipe (11) windward side be processed into glut shape, two described minute pressure pipe (11) the common cone angle type that constitutes described stagnation pressure tube (1) of the glut shape windward side head (114) that facings the wind.
2. the pick-up of test flow field direction according to claim 1 is characterized in that, each branch pressure pipe (11) comprises tilting section (111), horizontal segment (112) and vertical section (113);
Described tilting section (111) for described minute pressure pipe (11) stretch out described stay pipe (2) back bending and extend and form;
Described horizontal segment (112) forms for being extended by described tilting section (111), and parallel with described stay pipe (2);
Described vertical section (113) forms for being extended by described horizontal segment (112), and vertical with described horizontal segment (112).
3. the pick-up of test flow field direction according to claim 2, it is characterized in that, comprise also adding clamped plate (4) that described three sides that add clamped plate (4) are fixedlyed connected with described tilting section (111), described horizontal segment (112) and described stay pipe (2) respectively.
4. the pick-up of test flow field direction according to claim 1, it is characterized in that, the cone angle type of described stagnation pressure tube (1) head (114) down with the wind is an isosceles triangle at the cross sectional shape of two dividing potential drop tube's axis line directions, and the drift angle size of this isoceles triangle shape is 10 °～45 °.
5. according to the pick-up of each described test flow field direction in the claim 1 to 4, it is characterized in that: two described minute pressure pipe (11) inwalls of being fixed on pole.
6. according to the pick-up of each described test flow field direction in the claim 1 to 4, it is characterized in that, first end of being connected of first end of described stay pipe (2) and described stagnation pressure skirt (3), described stagnation pressure tube (1) and described stagnation pressure skirt (3) be connected and second end of described stagnation pressure skirt (3) is fixedly connected with described connecing being connected of mouth (5).
7. according to the pick-up of each described test flow field direction in the claim 1 to 4, it is characterized in that, first end of described stay pipe (2) and described stagnation pressure skirt (3) be connected and first end of described stagnation pressure tube (1) and described stagnation pressure skirt (3) be connected to telescopic flexible connection.
8. according to the pick-up of each described test flow field direction in the claim 1 to 4, it is characterized in that the internal diameter of each branch pressure pipe (11) is 0.5～1.5mm, the wall thickness of each branch pressure pipe (11) is 0.1～0.3mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110190840 CN102288785A (en) | 2011-07-08 | 2011-07-08 | Sensor for testing flow field direction |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110190840 CN102288785A (en) | 2011-07-08 | 2011-07-08 | Sensor for testing flow field direction |
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| Publication Number | Publication Date |
|---|---|
| CN102288785A true CN102288785A (en) | 2011-12-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201110190840 Pending CN102288785A (en) | 2011-07-08 | 2011-07-08 | Sensor for testing flow field direction |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104090125A (en) * | 2014-07-11 | 2014-10-08 | 中国航空动力机械研究所 | Method for measuring airflow direction angle of flow field |
| CN105699090A (en) * | 2016-01-22 | 2016-06-22 | 中国航空动力机械研究所 | Pneumatic parameter sensor |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0363695A1 (en) * | 1988-09-27 | 1990-04-18 | Europäische Atomgemeinschaft (Euratom) | Sensor for determining low speed currents in a pipe section |
| US5257536A (en) * | 1990-08-03 | 1993-11-02 | Sextant Avionique | Aircraft probe for measuring aerodynamic parameters of amient flow |
| US20030051546A1 (en) * | 1999-12-17 | 2003-03-20 | Lionel Collot | Aircraft probe |
| US20040261518A1 (en) * | 2003-06-26 | 2004-12-30 | Seidel Greg A. | Multi-function air data sensing probe having an angle of attack vane |
| CN101435728A (en) * | 2008-12-18 | 2009-05-20 | 中国科学院力学研究所 | Apparatus and method for measuring small rocket engine thrust force vector in vacuum |
-
2011
- 2011-07-08 CN CN 201110190840 patent/CN102288785A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0363695A1 (en) * | 1988-09-27 | 1990-04-18 | Europäische Atomgemeinschaft (Euratom) | Sensor for determining low speed currents in a pipe section |
| US5257536A (en) * | 1990-08-03 | 1993-11-02 | Sextant Avionique | Aircraft probe for measuring aerodynamic parameters of amient flow |
| US20030051546A1 (en) * | 1999-12-17 | 2003-03-20 | Lionel Collot | Aircraft probe |
| US20040261518A1 (en) * | 2003-06-26 | 2004-12-30 | Seidel Greg A. | Multi-function air data sensing probe having an angle of attack vane |
| CN101435728A (en) * | 2008-12-18 | 2009-05-20 | 中国科学院力学研究所 | Apparatus and method for measuring small rocket engine thrust force vector in vacuum |
Non-Patent Citations (3)
| Title |
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| 《推进技术》 19920831 林峰等 微型四孔探针技术初步研究 全文 1-8 , 第4期 * |
| 《热能与动力工程测试技术》 20010831 郑正泉等 第二节 二维流场中流动方向的测量 第100-102页，图4-7、4-10 1-8 , * |
| 《航空发动机》 20100430 闫久坤 叶型受感部设计及结构优化 全文 1-8 第36卷, 第2期 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104090125A (en) * | 2014-07-11 | 2014-10-08 | 中国航空动力机械研究所 | Method for measuring airflow direction angle of flow field |
| CN104090125B (en) * | 2014-07-11 | 2017-07-18 | 中国航空动力机械研究所 | Airflow direction angle measurement method for flow field |
| CN105699090A (en) * | 2016-01-22 | 2016-06-22 | 中国航空动力机械研究所 | Pneumatic parameter sensor |
| CN105699090B (en) * | 2016-01-22 | 2018-08-14 | 中国航空动力机械研究所 | Aerodynamic parameter pick-up |
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Application publication date: 20111221 |