CN109269760A - A kind of pressure piping reduction of blood pressure in high-speed device based on principle of entropy increase - Google Patents
A kind of pressure piping reduction of blood pressure in high-speed device based on principle of entropy increase Download PDFInfo
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- CN109269760A CN109269760A CN201811364047.0A CN201811364047A CN109269760A CN 109269760 A CN109269760 A CN 109269760A CN 201811364047 A CN201811364047 A CN 201811364047A CN 109269760 A CN109269760 A CN 109269760A
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- pressure
- speed device
- blood pressure
- reduction
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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
- G01M9/06—Measuring arrangements specially adapted for aerodynamic testing
- G01M9/065—Measuring arrangements specially adapted for aerodynamic testing dealing with flow
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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
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- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- External Artificial Organs (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
A kind of pressure piping reduction of blood pressure in high-speed device based on principle of entropy increase, is related to pressure piping reduction technology.Purpose is to solve the problems, such as that structure is complicated, high construction cost for reducer unit in high-speed wind tunnel corollary system.A kind of pressure piping reduction of blood pressure in high-speed device based on principle of entropy increase of the present invention include nozzle section, etc. straight sections, restricting orifice and rear chamber, nozzle section, etc. straight sections and rear chamber be sequentially connected logical, restricting orifice is located between equal straight sections and rear chamber.The forms such as straight panel, inclined plate can be used in riser, and position of opening may be selected in the whole apertures of side plate, riser or both, and position of opening and percent opening are adjustable as needed.The Mach number of nozzle section is not higher than 4.5.The present invention can be realized the pressure drop of 100:1, have explicit costs advantage compared with complicated reducer unit.
Description
Technical field
The invention belongs to circuit design technical fields, and in particular to pressure piping reduction technology.
Background technique
High-speed wind tunnel especially hypersonic wind tunnel generally requires higher supply gas pressure, the auxiliary construction in wind-tunnel construction
High-pressure air source often need the lower gas source feed movable valve of pressure simultaneously up to 20MPa or more, but in matched with wind tunnel system
And other systems use, this just needs to be equipped with complicated reducer unit and realizes decompression gas supply.By taking shock tunnel as an example, gas source is supplied
Pressure may be up to 30MPa, and corollary system stream pressure demand is from 10~20atm etc., therefore devise complicated pressure reducing valve
Group increases construction cost.Furthermore high pressure is extremely widespread in industrial applications such as chemical industry, metallurgy and electric power for being vented, and there is also phases
Same problem.Therefore, it is necessary to develop a kind of passive dropping equipment of economic and reliable high pressure draught is reduced to discharge allowed band
Interior discharge is reduced to and accurately controls supply gas pressure by valve after nearby using pressure.
Summary of the invention
Structure is complicated the purpose of the present invention is to solve reducer unit in high-speed wind tunnel corollary system, high construction cost
Problem provides a kind of pressure piping reduction of blood pressure in high-speed device based on principle of entropy increase.
A kind of pressure piping reduction of blood pressure in high-speed device based on principle of entropy increase of the present invention include nozzle section, etc. straight sections,
Restricting orifice and rear chamber, nozzle section, etc. straight sections and rear chamber be sequentially connected logical, restricting orifice is located at equal straight sections and back cavity
Between room.
Further, restricting orifice includes riser and side plate.
Further, the riser is straight panel.
Further, the riser is inclined plate.
Further, the position of opening of restricting orifice is located on riser.
Further, the position of opening of restricting orifice is located on side plate.
Further, the position of opening of restricting orifice is located on riser and side plate.
Further, the Mach number of nozzle section is not higher than 4.5.
The present invention has the advantages that
1. realizing pressure piping flowing using nozzle section and restricting orifice to be significantly depressured, and guarantee that flow is constant
2. structure is simply easily achieved
3. having apparent price advantage compared with complicated decompression valve group
4. can realize that pressure relief ranges are controllable by adjustable jet tube type face and well plate format according to different decompression demands.
Detailed description of the invention
Fig. 1 is a kind of a kind of structural representation of pressure piping reduction of blood pressure in high-speed device based on principle of entropy increase of the present invention
Figure, wherein the riser of restricting orifice is straight panel；
Fig. 2 is that a kind of another structure of pressure piping reduction of blood pressure in high-speed device based on principle of entropy increase of the present invention is shown
It is intended to, wherein the riser of restricting orifice is inclined plate；
Fig. 1 and Fig. 2 is axial symmetry round pipe two dimension schematic diagram.
Specific embodiment
Specific embodiment 1: a kind of pressure piping reduction of blood pressure in high-speed device based on principle of entropy increase described in present embodiment
Including nozzle section 1, etc. straight sections 2, restricting orifice 3 and rear chamber 4, nozzle section 1, etc. straight sections 2 and rear chamber 4 be sequentially connected
Logical, restricting orifice 3, which is located at, to be waited between straight sections 2 and rear chamber 4.Restricting orifice 3 can be straight panel and (hang down with the axis of equal straight sections 2
Directly), as shown in Figure 1；It is also possible to inclined plate (angled with the axis of equal straight sections 2), as shown in Figure 2.Wherein nozzle section 1
Different nozzle contours or expansion pipeline (being generally not more than Mach number 4.5), section may be selected according to different incoming-flow pressures and decompression demand
Discharge orifice plate 3 determines outlet size according to pipeline size is followed by according to Throttling ratio selecting hole packing free ratio, rear chamber 4.
Supersonic nozzle can be selected in nozzle section 1, and supersonic nozzle combination restricting orifice 3 can be realized pipeline flowing substantially
Degree decompression, has the decompression ability of 100:1, and wherein level-one decompression forms normal shock wave by jet pipe rear portion and realizes；Second level decompression passes through
Restricting orifice 3 realizes that as depicted in figs. 1 and 2, orifice plate 3 is made of riser and side plate, and the forms such as straight panel, inclined plate can be used in riser,
Position of opening may be selected in the whole apertures of side plate, riser or both, and position of opening and percent opening are adjustable as needed；Rear chamber 4
Play the role of rectification blending and control exhaust velocity.
Above-mentioned pressure piping reduction of blood pressure in high-speed device is applied to the coarse adjustment of pressure piping flowing reduction pressure.In use, high pressure
Air-flow enters nozzle section 1, at rear portion under the influence of restricting orifice 3, forms normal shock wave in the outlet of nozzle section 1, completes first order drop
Pressure；Air-flow completes second level decompression after flowing through restricting orifice 3 under the influence of throttle effect；Air-flow is after rear chamber 4 sufficiently blending
Discharge, if it is high-pressure air feed, the accurate adjusting of pressure can be realized by being followed by pressure regulator valve, be followed by gas exhaust piping if it is high pressure gas
?.
The decompression means of pipeline flowing include mechanical structure method such as valve and restricting orifice etc., and Pneumatic method swashs as utilized
Wave loss and separation friction loss etc..The present invention is mainly in the way of shock loss combination orifice throttle, preposition nozzle current limliting
It can guarantee the constant of flow, on the other hand on the one hand it is that throttling is made that the effect of postposition orifice plate is that throttling entropy increasing causes pitot loss
Normal shock wave entropy increase shock loss is formed after making jet pipe at high back-pressure, the present apparatus has relative to valve regulated utilizes pneumatic entropy
Increase that principle decompression range is big, flow is constant, structure is simple and the advantages such as low in cost.
Claims (8)
1. a kind of pressure piping reduction of blood pressure in high-speed device based on principle of entropy increase, which is characterized in that including nozzle section, etc. straight sections, section
Discharge orifice plate and rear chamber, nozzle section, etc. straight sections and rear chamber be sequentially connected logical, restricting orifice is located at equal straight sections and rear chamber
Between.
2. pressure piping reduction of blood pressure in high-speed device according to claim 1, which is characterized in that restricting orifice includes riser and side
Plate.
3. pressure piping reduction of blood pressure in high-speed device according to claim 2, which is characterized in that the riser is straight panel.
4. pressure piping reduction of blood pressure in high-speed device according to claim 2, which is characterized in that the riser is inclined plate.
5. according to pressure piping reduction of blood pressure in high-speed device described in claim 2,3 or 4, which is characterized in that the aperture of restricting orifice
Position is located on riser.
6. according to pressure piping reduction of blood pressure in high-speed device described in claim 2,3 or 4, which is characterized in that the aperture of restricting orifice
Position is located on side plate.
7. according to pressure piping reduction of blood pressure in high-speed device described in claim 2,3 or 4, which is characterized in that the aperture of restricting orifice
Position is located on riser and side plate.
8. pressure piping reduction of blood pressure in high-speed device according to claim 1, which is characterized in that the Mach number of nozzle section is not higher than
4.5。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811364047.0A CN109269760B (en) | 2018-11-15 | 2018-11-15 | High-pressure pipeline rapid pressure reduction device based on entropy increase principle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811364047.0A CN109269760B (en) | 2018-11-15 | 2018-11-15 | High-pressure pipeline rapid pressure reduction device based on entropy increase principle |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109269760A true CN109269760A (en) | 2019-01-25 |
| CN109269760B CN109269760B (en) | 2021-04-16 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201811364047.0A Active CN109269760B (en) | 2018-11-15 | 2018-11-15 | High-pressure pipeline rapid pressure reduction device based on entropy increase principle |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1451528A (en) * | 2002-04-19 | 2003-10-29 | 萨勒奥利考 | Device for regulating flow and/or pressure of fluid |
| CN102384834A (en) * | 2011-08-10 | 2012-03-21 | 中国科学院力学研究所 | Detonation-driving shock tunnel explosive discharge device |
| CN102748332A (en) * | 2012-06-28 | 2012-10-24 | 北京工业大学 | Pressure reducing device with temperature recovery function |
| CN105607668A (en) * | 2015-12-21 | 2016-05-25 | 北京航天益森风洞工程技术有限公司 | Air flow regulator |
-
2018
- 2018-11-15 CN CN201811364047.0A patent/CN109269760B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1451528A (en) * | 2002-04-19 | 2003-10-29 | 萨勒奥利考 | Device for regulating flow and/or pressure of fluid |
| CN102384834A (en) * | 2011-08-10 | 2012-03-21 | 中国科学院力学研究所 | Detonation-driving shock tunnel explosive discharge device |
| CN102748332A (en) * | 2012-06-28 | 2012-10-24 | 北京工业大学 | Pressure reducing device with temperature recovery function |
| CN105607668A (en) * | 2015-12-21 | 2016-05-25 | 北京航天益森风洞工程技术有限公司 | Air flow regulator |
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| Publication number | Publication date |
|---|---|
| CN109269760B (en) | 2021-04-16 |
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