CN108267290A - A kind of quiet jet pipe boundary layer suction arrangement - Google Patents
A kind of quiet jet pipe boundary layer suction arrangement Download PDFInfo
- Publication number
- CN108267290A CN108267290A CN201711374788.2A CN201711374788A CN108267290A CN 108267290 A CN108267290 A CN 108267290A CN 201711374788 A CN201711374788 A CN 201711374788A CN 108267290 A CN108267290 A CN 108267290A
- Authority
- CN
- China
- Prior art keywords
- jet pipe
- boundary layer
- nozzle throat
- nozzle
- lip
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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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
- G01M9/00—Aerodynamic testing; Arrangements in or on wind tunnels
- G01M9/02—Wind tunnels
- G01M9/04—Details
-
- 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
- G01M9/06—Measuring arrangements specially adapted for aerodynamic testing
- G01M9/065—Measuring arrangements specially adapted for aerodynamic testing dealing with flow
Abstract
A kind of quiet jet pipe boundary layer suction arrangement, is related to wind tunnel test field；Including jet pipe contraction section and suction socket, nozzle throat, nozzle expansion section and pressure sensor；Wherein, jet pipe contraction section, nozzle throat and nozzle expansion section are hollow tubular structure；Jet pipe contraction section, nozzle throat and nozzle expansion section are sequentially connected in an axial direction；Nozzle throat is fixedly mounted on the junction of jet pipe contraction section and nozzle throat；Pressure sensor is fixed on nozzle throat；Suction socket is L-shaped pipeline configuration；The lip of suction socket is connected with jet pipe contraction section and nozzle throat；The present invention adapts to different operating statuses, and suction socket lip is small to the interference of venturi downstream flow field, and suction socket debugging process convenience and high-efficiency, easy to clean.
Description
Technical field
The present invention relates to a kind of wind tunnel test field, particularly a kind of quiet jet pipe boundary layer suction arrangement.
Background technology
Experiment is twisted in turning of carrying out of conventional hypersonic wind tunnel, since its incoming has the noise of certain magnitude, makes side
It is always more forward than theoretical that the turning of interlayer twists starting point.This noise is commonly considered as due to the acoustically radiating of jet pipe wall surface turbulent boundary layer
It penetrates disturbance to cause, tablet and pointed cone can be severely impacted and turn to twist as a result, the transition Reynolds number of its middle plateform is even than low incoming
The small magnitude of result under noise conditions.Therefore in conventional hypersonic wind tunnel, it is very difficult to it is special to carry out effective boundary layer transition
Property experimental study.
Invention content
It is an object of the invention to overcome the above-mentioned deficiency of the prior art, a kind of quiet jet pipe boundary layer suction arrangement is provided,
Different operating statuses is adapted to, suction socket lip is small to the interference of venturi downstream flow field, and suction socket debugging process convenience and high-efficiency, clearly
It washes conveniently.
The above-mentioned purpose of the present invention is achieved by following technical solution：
A kind of quiet jet pipe boundary layer suction arrangement, including jet pipe contraction section and suction socket, nozzle throat, nozzle expansion section and
Pressure sensor；Wherein, jet pipe contraction section, nozzle throat and nozzle expansion section are hollow tubular structure；Jet pipe contraction section, spray
Pipe venturi and nozzle expansion section are sequentially connected in an axial direction；Nozzle throat is fixedly mounted on the connection of jet pipe contraction section and nozzle throat
Place；Pressure sensor is fixed on nozzle throat.
In a kind of above-mentioned quiet jet pipe boundary layer suction arrangement, the suction socket is L-shaped pipeline configuration；The lip of suction socket
Mouth is connected with jet pipe contraction section and nozzle throat；The outer wall of outer wall and jet pipe contraction section at lip seamlessly transits；At lip
The outer wall of inner wall and nozzle throat seamlessly transits.
In a kind of above-mentioned quiet jet pipe boundary layer suction arrangement, the suction flow of the suction socket is more than entire nozzle entry stream
The 30% of amount.
In a kind of above-mentioned quiet jet pipe boundary layer suction arrangement, the lip and the junction C points of nozzle throat taken out is half
Ball or spheroid-like.
In a kind of above-mentioned quiet jet pipe boundary layer suction arrangement, the CK sections of the suction socket lower surface are horizontal linear knot
Structure；KJ sections are circular sliding slopes structure.
In a kind of above-mentioned quiet jet pipe boundary layer suction arrangement, bottom surface one end of the pressure sensor is fixedly mounted on lip
The B of mouth outer wall is pointed out；The bottom surface other end of pressure sensor is at the H points of lip outer wall；And it is connect with H point circular arcs.
In a kind of above-mentioned quiet jet pipe boundary layer suction arrangement, the B points of lip outer wall can to vertical distance CK sections horizontal
It adjusts.
HI sections at a kind of above-mentioned quiet jet pipe boundary layer suction arrangement, the suction socket outer wall corner are straightway；
And HI straightways and horizontal direction angle are 40-55 °.
In a kind of above-mentioned quiet jet pipe boundary layer suction arrangement, the MI sections of the suction socket are vertical straight line with NJ sections
Section.
In a kind of above-mentioned quiet jet pipe boundary layer suction arrangement, nozzle throat is axially symmetric structure；And the D on nozzle throat
Point uses three sections of circular sliding slopes with C points.
The present invention has the following advantages that compared with prior art：
(1) its feature of boundary layer suction arrangement is that the boundary layer of nozzle throat upstream can be aspirated in the present invention, reduces
Or eliminate the disturbance of contraction section upstream；
(2) contraction section enables to air-flow uniformly to accelerate in the present invention, improves the flow quality of test section；
(3) suction socket groove width is adjustable in the present invention, by adjusting groove width control and suck flow so that nozzle expansion section obtains
Larger stationary stream area；
(4) quiet jet pipe boundary layer suction arrangement of the invention can effectively aspirate the boundary layer of venturi upstream, information of flow
It can show in real time, debugging process convenience and high-efficiency is easy to clean.
Description of the drawings
Fig. 1 is the quiet jet pipe boundary layer suction arrangement schematic diagram of the present invention；
Fig. 2 is suction socket close-up schematic view of the present invention.
Specific embodiment
The present invention is described in further detail in the following with reference to the drawings and specific embodiments：
The present invention can effectively aspirate the boundary layer of nozzle throat upstream, pass through adjusting in quiet wind tunnel experiment
Aspirate groove width so that the disturbance generated at suction socket lip stationary point does not interfere with the downstream to nozzle throat.Suction socket is suitable
Suction flow, the circular arc sector in B points downstream, the HI regions of certain angle and the suction socket lip C of spherical shape or spheroid shape so that receive
The oscillation of contracting section wall surface boundary layer upstream will not diffuse through notch along downstream and enter jet pipe wall surface boundary layer.
It is as shown in Figure 1 quiet jet pipe boundary layer suction arrangement schematic diagram, a kind of quiet jet pipe boundary layer suction arrangement, feature
It is：Including jet pipe contraction section 1 and suction socket 2, nozzle throat 3, nozzle expansion section 4 and pressure sensor 5；Wherein, jet pipe is received
Contracting section 1, nozzle throat 3 and nozzle expansion section 4 are hollow tubular structure；Jet pipe contraction section 1, nozzle throat 3 and nozzle expansion
Section 4 is sequentially connected in an axial direction；Nozzle throat 3 is fixedly mounted on the junction of jet pipe contraction section 1 and nozzle throat 3；Pressure sensing
Device 5 is fixed on nozzle throat 3.The response of pressure sensor 5 and sample frequency are high, can monitor the pressure of suction socket in real time
Power；It the type face of contraction section 1 and suction socket 2 must height bright and clean, stringent limiting surface ripple and defect.Suction socket 2 is axial symmetry
Device avoids uneven suction from generating disturbance.Shut-off valve high-speed electromagnetic valve is set to carry out open and close control in 2 pipeline of suction socket.
The contraction section 1 of the present invention using the curve for being capable of flexible controlling curve shape, such as the dimension formula curve of shifting axis or
CQCQ curves, make incoming uniformly accelerate, and improve test section flow quality.The speed of the neighbouring air-flow of B points in the suction socket 2 of the present invention
For the velocity of sound, the noise in B points downstream is not transferred to B point upstream regions.
Suction socket 2 is L-shaped pipeline configuration；The lip 2-1 of suction socket 2 is connected with jet pipe contraction section 1 and nozzle throat 3；Lip
The outer wall of outer wall and jet pipe contraction section 1 at mouth 2-1 seamlessly transits；The outer wall of inner wall and nozzle throat 3 at lip 2-1 is smooth
Transition.Inhale flow and be more than entire nozzle entry flow the 30% of suction socket 2.
Suction socket close-up schematic view is illustrated in figure 2, as seen from the figure, takes out the junction of lip 2-1 and nozzle throat 3
C points are hemisphere or spheroid-like；Reduce interference of the aspiration procedure to downstream.The CK sections of 2 lower surface of suction socket are horizontal linear knot
Structure；Facilitate the cleaning of suction socket 2；KJ sections are circular sliding slopes structure.The B points of lip 2-1 outer walls are to vertical distance CK sections horizontal
It is adjustable；Suction flow is adjusted according to flow field characteristic, reduces influence of the nozzle throat upstream disturbances to downstream.2 outer wall of suction socket turns
HI sections at angle are straightway；And HI straightways and horizontal direction angle are 40-55 °.The MI sections of suction socket 2 are perpendicular with NJ sections
Straight straightway.
The B that bottom surface one end of pressure sensor 5 is fixedly mounted on lip 2-1 outer walls is pointed out；The bottom surface of pressure sensor 5 is another
One end is at the H points of lip 2-1 outer walls；And it is connect with H point circular arcs.
3 upstream and downstream line smoothing transition of nozzle throat, slope are identical；And the D points on nozzle throat 3 use three sections with C points
Circular sliding slopes.
The content not being described in detail in description of the invention belongs to the known technology of those skilled in the art.
Claims (10)
1. a kind of quiet jet pipe boundary layer suction arrangement, it is characterised in that：Including jet pipe contraction section (1) and suction socket (2), jet pipe larynx
Road (3), nozzle expansion section (4) and pressure sensor (5)；Wherein, jet pipe contraction section (1), nozzle throat (3) and nozzle expansion section
(4) it is hollow tubular structure；Jet pipe contraction section (1), nozzle throat (3) and nozzle expansion section (4) are sequentially connected in an axial direction；Spray
Pipe venturi (3) is fixedly mounted on the junction of jet pipe contraction section (1) and nozzle throat (3)；Pressure sensor (5) is fixed at
On nozzle throat (3).
2. a kind of quiet jet pipe boundary layer suction arrangement according to claim 1, it is characterised in that：The suction socket (2)
For L-shaped pipeline configuration；The lip (2-1) of suction socket (2) is connected with jet pipe contraction section (1) and nozzle throat (3)；Lip (2-1)
The outer wall at place and the outer wall of jet pipe contraction section (1) seamlessly transit；The outer wall of inner wall and nozzle throat (3) at lip (2-1) is put down
It slips over and crosses.
3. a kind of quiet jet pipe boundary layer suction arrangement according to claim 2, it is characterised in that：The suction socket (2)
Inhale flow is more than entire nozzle entry flow 30%.
4. a kind of quiet jet pipe boundary layer suction arrangement according to claim 3, it is characterised in that：The pumping lip (2-1)
Junction C points with nozzle throat (3) are hemisphere or spheroid-like.
5. a kind of quiet jet pipe boundary layer suction arrangement according to claim 4, it is characterised in that：Under the suction socket (2)
The CK sections on surface are horizontal linear structure；KJ sections are circular sliding slopes structure.
6. a kind of quiet jet pipe boundary layer suction arrangement according to claim 5, it is characterised in that：The pressure sensor
(5) B that bottom surface one end is fixedly mounted on lip (2-1) outer wall is pointed out；The bottom surface other end of pressure sensor (5) is close to lip
At the H points of (2-1) outer wall；And it is connect with H point circular arcs.
7. a kind of quiet jet pipe boundary layer suction arrangement according to claim 6, it is characterised in that：The B of lip (2-1) outer wall
Point to horizontal CK sections of vertical distance is adjustable.
8. a kind of quiet jet pipe boundary layer suction arrangement according to claim 7, it is characterised in that：The suction socket (2) is outside
The HI sections of wall corner are straightway；And HI straightways and horizontal direction angle are 40-55 °.
9. a kind of quiet jet pipe boundary layer suction arrangement according to claim 8, it is characterised in that：The suction socket (2)
MI sections and NJ sections are vertical straight line section.
10. a kind of quiet jet pipe boundary layer suction arrangement according to claim 9, it is characterised in that：Nozzle throat (3) is axis
Symmetrical structure；And the D points on nozzle throat (3) use three sections of circular sliding slopes with C points.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711374788.2A CN108267290A (en) | 2017-12-19 | 2017-12-19 | A kind of quiet jet pipe boundary layer suction arrangement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711374788.2A CN108267290A (en) | 2017-12-19 | 2017-12-19 | A kind of quiet jet pipe boundary layer suction arrangement |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108267290A true CN108267290A (en) | 2018-07-10 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711374788.2A Pending CN108267290A (en) | 2017-12-19 | 2017-12-19 | A kind of quiet jet pipe boundary layer suction arrangement |
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|---|---|
| CN (1) | CN108267290A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109697923A (en) * | 2019-03-04 | 2019-04-30 | 长沙理工大学 | A kind of device for jet pipe teaching |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04289425A (en) * | 1991-02-27 | 1992-10-14 | Mitsubishi Electric Corp | Intermittent blow type wind tunnel testing apparatus |
| CN102998084A (en) * | 2012-12-28 | 2013-03-27 | 中国人民解放军国防科学技术大学 | Hypersonic velocity spray pipe structure |
-
2017
- 2017-12-19 CN CN201711374788.2A patent/CN108267290A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04289425A (en) * | 1991-02-27 | 1992-10-14 | Mitsubishi Electric Corp | Intermittent blow type wind tunnel testing apparatus |
| CN102998084A (en) * | 2012-12-28 | 2013-03-27 | 中国人民解放军国防科学技术大学 | Hypersonic velocity spray pipe structure |
Non-Patent Citations (4)
| Title |
|---|
| TASKINOGLU, ES等: "Computational fluid dynamics evaluation of bleed slot of purdue Mach 6 quiet tunnel", 《AIAA JOURNAL》 * |
| 周勇为 等: "M6 高超声速静风洞的气动设计和结构研究", 《国防科技大学学报》 * |
| 陆小革: "基于LabWindows/CVI的高超声速静风洞测控系统的设计与应用", 《中国优秀硕士学位论文全文数据库工程科技Ⅱ辑》 * |
| 高亮杰 等: "高马赫数低噪声风洞层流喷管设计与性能评估", 《航空科学技术》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109697923A (en) * | 2019-03-04 | 2019-04-30 | 长沙理工大学 | A kind of device for jet pipe teaching |
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| PB01 | Publication | ||
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Application publication date: 20180710 |