CN106546374B - Static pressure measurement device and flow velocity measuring method in a kind of complex flowfield - Google Patents
Static pressure measurement device and flow velocity measuring method in a kind of complex flowfield Download PDFInfo
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- CN106546374B CN106546374B CN201611052229.5A CN201611052229A CN106546374B CN 106546374 B CN106546374 B CN 106546374B CN 201611052229 A CN201611052229 A CN 201611052229A CN 106546374 B CN106546374 B CN 106546374B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L11/00—Measuring steady or quasi-steady pressure of a fluid or a fluent solid material by means not provided for in group G01L7/00 or G01L9/00
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
- G01P5/00—Measuring speed of fluids, e.g. of air stream; Measuring speed of bodies relative to fluids, e.g. of ship, of aircraft
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Abstract
The invention discloses static pressure measurement device in a kind of complex flowfield and flow velocity measuring methods, including pressure pipe, connecting tube, pressure head, pressure acquiring mechanism and baffle plate, the pressure head is arranged in pressure acquiring mechanism, connecting tube is arranged between pressure pipe and pressure head and the both ends of connecting tube are connect with pressure pipe and pressure head respectively, the end that connecting tube is connect with pressure head is arranged inside pressure acquiring mechanism, and connecting tube is connect with pressure acquiring mechanism, baffle plate is fixed with pressure acquiring mechanism, and pressure pipe, connecting tube, pressure head and pressure acquiring mechanism are sequentially communicated.The present invention can be in the continually changing complicated transition flow field of fluid flow direction, the influence of transition dynamic pressure is effectively shielded under the conditions of various fluid flow directions, cooperate static pressure in pressure sensor real-time measurement complexity transition flow field, and according to the difference of static pressure and total pressure, specific position real-time flow rate in flow field is calculated, provides basis for flow field measuring and calculating.
Description
Technical field
The present invention relates to pressure, flow field survey field in nuclear power environment, and in particular to static pressure measurement in a kind of complex flowfield
Device and flow velocity measuring method.
Background technique
In complicated transition flow field, for the measurement of static pressure, will receive the transition dynamic pressure that transient fluid flowing generates influences,
In order to shield influence of the transition dynamic pressure to static pressure measurement, static pressure in real-time measurement complexity transition flow field, it is multiple that there is an urgent need to one kind
Static pressure measurement device in miscellaneous flow field, in which:
(1) U.S. A.S.CHIPLEY etc. uses T-type pressure mouth structure for static pressure measurement application patent, the patent, surveys
Measure static pressure.But that static pressure is measured under specific flow field condition is more accurate for the patent, but measured in complicated transition flow field
As a result it is possible that fluctuation, applicability are poor.
(2) U.S. John R.Andrus et al. has applied for patent for hydrostatic pressure measurement, which is buffered using two-stage
The principle that separate space weakens gas motion measures static pressure.It can be seen that the patent pressure tappings in countercurrent direction condition from its pressure tappings
Static pressure obtained by lower measurement is relatively low, therefore applicability is poor in complicated transition flow field.
(3) the A.Robert Porro in the U.S. et al. is for the patent of environment pressure measurement application in gaseous mobile field.This is specially
Benefit adaptability under the conditions of liquid environment is poor, and can not calculate flow velocity.
Show up to now, to have no about a kind of complicated stream by the inquiry above to domestic and foreign literature and patented technology
The patent records of static pressure measurement device and flow velocity measuring method in.
Summary of the invention
The technical problem to be solved by the present invention is to existing in complicated transition flow field when being directed to the measurement of static pressure, will receive
The transition dynamic pressure that transient fluid flowing generates influences, and can not accurately measure static pressure, influence to flow field situation in nuclear power station
Monitoring provides static pressure measurement device and flow-speed measurement method in a kind of complex flowfield, which can be in complicated wink
In unsteady flow field, real-time measurement static pressure, and according to the difference of static pressure and total pressure, specific position real-time flow rate in flow field is calculated, is
Flow field measuring and calculating provides basis.
The present invention is achieved through the following technical solutions:
Static pressure measurement device in a kind of complex flowfield, including pressure pipe, connecting tube, pressure head, pressure acquiring mechanism and baffling
Plate, the pressure head are arranged in pressure acquiring mechanism, and connecting tube is arranged between pressure pipe and pressure head and the both ends of connecting tube point
It is not connect with pressure pipe and pressure head, the end that connecting tube is connect with pressure head is arranged inside pressure acquiring mechanism, and connecting tube
It is connect with pressure acquiring mechanism, baffle plate is fixed with pressure acquiring mechanism, and pressure pipe, connecting tube, pressure head and pressure acquiring mechanism successively connect
Logical, pressure pipe is connected with pressure sensor far from one end of connecting tube.When carrying out pressure or flow velocity measurement in nuclear power environment,
Working media in flow field is usually aqueous medium, steam medium, gas medium and oil medium, and pressure is normal pressure~30MPa, temperature
Degree is room temperature~300 DEG C, since fluid flow direction is changeable perhaps unstable in flow field or other factors influence and are formed multiple
Miscellaneous flow field, it is therefore desirable to the static pressure in the flow field is measured, and existing measuring device or measurement method both in
Environment pressure measurement in static pressure or simple gaseous mobile field is measured under specific flow field condition, is measured under specific flow field condition quiet
Pressure is easily achieved, and can obtain accurate measurement result, but measurement result may in nuclear power station complexity transition flow field
It fluctuates, causes measured value inaccurate, be unable to satisfy use demand, and be only able to carry out environment pressure in simple gaseous mobile field
Force measuring device, adaptability is poor under the conditions of liquid environment, and can not calculate flow velocity, can not satisfy the use demand.This
The measuring device and method of conceptual design will by setting pressure pipe, connecting tube, pressure head, pressure acquiring mechanism and baffle plate
Pressure pipe is connect with pressure sensor, utilizes formula u=[2 × (PEntirely-PIt is quiet)/ρ]0.5To carry out complex flowfield inner fluid speed
Calculate, wherein PEntirelyWhen being individually placed at the position for needing to measure flow velocity for pressure pipe, the pressure tappings of pressure pipe, which are met to needs, to be obtained
The direction of flow velocity, pressure sensor measurement gained pressure when pressure pipe is connect with pressure sensor；PIt is quietIt is installed on for the present apparatus multiple
When miscellaneous transition flow field domestic demand will measure the position of flow velocity, pressure sensor measurement gained pressure when pressure pipe is connect with pressure sensor
Power；ρ is fluid density.The measuring device and method of this programme design can be in the continually changing complicated transitions of fluid flow direction
In flow field, the influence of transition dynamic pressure is effectively shielded under the conditions of various fluid flow directions, cooperates pressure sensor real-time measurement
Static pressure in complicated transition flow field, and according to the difference of static pressure and total pressure, the real-time flow rate of specific position in flow field is calculated, for stream
Field measuring and calculating provides basis, can be suitable for the working media a variety of flow fields, strong applicability, and the data measured are accurate,
When being directed to the measurement of static pressure especially in complicated transition flow field, the transition dynamic pressure shadow that transient fluid flowing generates not will receive
It rings, static pressure can be fast and accurately measured, to meet the monitoring requirements of flow field situation in nuclear power station.
Baffle plate includes long baffle plate and short baffle plate, and short baffle plate is fixed on the outer wall of pressure acquiring mechanism, long baffle plate
The one end of pressure acquiring mechanism far from pressure pipe is set, pitman, and pitman are provided between long baffle plate and pressure acquiring mechanism
It is connect simultaneously with long baffle plate and pressure acquiring mechanism, wherein the concave side wall that short baffle plate and pressure acquiring mechanism are fixed forms installation cavity,
And the wall surface of installation cavity outer wall seamless corresponding on pressure acquiring mechanism is fixed.Baffle plate is for working media in stream field
Flow direction is changed, and material is consistent according to the choice of material of pressure pipe with the material of pressure pipe.
The quantity of pitman is preferably three, and three connect with long baffle plate and pressure acquiring mechanism, and three pitmans are equal
Even arrangement, angle is 120 ° two-by-two, and long baffle plate and three pitmans weld, and need to guarantee the opposite of baffle plate and pressure acquiring mechanism
Position, the material of pitman are consistent according to the choice of material of pressure pipe with the material of pressure pipe.The quantity of pitman can also
To be two, four or five etc., selected according to actual needs.
Pressure acquiring mechanism includes linkage section and buffer chamber, and linkage section and buffer chamber are connected as overall structure, pressure head
It is arranged in buffer chamber, connecting tube is arranged in linkage section and screws with the inner thread of linkage section, and in buffer chamber
Separate one end connecting with linkage section is provided with the through-hole being connected to buffer chamber, is connected to inside through-hole and buffer chamber, and set
It sets between three pitmans, i.e., one end of buffer chamber is provided with through-hole, be not provided with one end and the linkage section phase of through-hole
Connection, through-hole can make cushion chamber falls portion be connected to extraneous flow field.The material of pressure acquiring mechanism is selected according to the material of pressure pipe
It takes, is consistent with the material of pressure pipe.Need to process 45 ° of tilt angle of transition between linkage section and buffer chamber outer surface
Section.It is connected between surface by the nature transition of aperture difference inside linkage section and buffer chamber.
Pressure head is flat mouth threeway pressure head, and the one end of branch pipe and connecting tube far from pressure pipe of flat mouth threeway pressure head is solid
Fixed and connection.The material of flat mouth threeway pressure head is consistent according to the choice of material of pressure pipe with the material of pressure pipe, and flat
Mouth threeway pressure head is equal tee.Make to can be realized pressure stabilization when pressure in this way, and the threeway line of pressure head is in T
Type shape, the branch pipe being connected to connecting tube is vertical with other two branch pipes, and the side wall towards long baffle plate direction does not open up
Branch pipe.
Compared with prior art, the present invention having the following advantages and benefits: the present invention can be in fluid flowing side
Into continually changing complicated transition flow field, the influence of transition dynamic pressure is effectively shielded under the conditions of various fluid flow directions, is matched
Static pressure in combined pressure force snesor real-time measurement complexity transition flow field, and according to the difference of static pressure and total pressure, calculate flow field Nei Te
Real-time flow rate is set in positioning, provides basis for flow field measuring and calculating.
Detailed description of the invention
Attached drawing described herein is used to provide to further understand the embodiment of the present invention, constitutes one of the application
Point, do not constitute the restriction to the embodiment of the present invention.In the accompanying drawings:
Fig. 1 is schematic structural view of the invention；
Fig. 2 is the structural schematic diagram of connecting tube；
Fig. 3 is the structural schematic diagram of pressure head；
Fig. 4 is the structural schematic diagram of pressure acquiring mechanism；
Fig. 5 is the A of Fig. 4 to schematic diagram；
Fig. 6 is the A of Fig. 5 to schematic diagram；
Fig. 7 is the structural schematic diagram of short baffle plate.
Label and corresponding parts title in attached drawing:
1- pressure pipe, 2- connecting tube, 3- pressure head, 4- pressure acquiring mechanism, the short baffle plate of 5-, 6- pitman, 7- long baffle plate.
Specific embodiment
To make the objectives, technical solutions, and advantages of the present invention clearer, below with reference to embodiment and attached drawing, to this
Invention is described in further detail, and exemplary embodiment of the invention and its explanation for explaining only the invention, are not made
For limitation of the invention.
Embodiment
As shown in Figures 1 to 7, static pressure measurement device in a kind of complex flowfield, structure include pressure pipe 1, connecting tube 2,
Pressure head 3, pressure acquiring mechanism 4 and baffle plate, baffle plate include long baffle plate 7 and short baffle plate 5, and the setting of pressure head 3 exists
In pressure acquiring mechanism 4, connecting tube 2 be arranged between pressure pipe 1 and pressure head 3 and the both ends of connecting tube 2 respectively with pressure pipe 1 and take
Pressure head 3 connects, and the end that connecting tube 2 is connect with pressure head 3 is arranged inside pressure acquiring mechanism 4, and connecting tube 2 and pressure acquiring mechanism
4 connections, baffle plate and pressure acquiring mechanism 4 are fixed, and pressure pipe 1, connecting tube 2, pressure head 3 and pressure acquiring mechanism 4 are sequentially communicated.By
It is usually aqueous medium, steam medium, gas medium and oil medium in working media of this programme suitable for flow field, pressure is
Normal pressure~30MPa, temperature are room temperature~300 DEG C, and pressure pipe 1 can choose corrosion-resistant stainless steel material or copper material.If pressure pipe 1
It is larger that there are internal-external temperature differences, if the temperature difference is more than 30 DEG C of sections, then chooses corrosion-resistant stainless steel material, otherwise chooses copper material.In work
Making pressure is normal pressure~15MPa, pressure thickness of pipe wall δPressureFor 1.5mm；Operating pressure is higher than 15MPa and is not higher than 30MPa condition
Under, pressure thickness of pipe wall δPressureFor 2mm.Pressure bore dinPressureIt is chosen according to different operating media environment.Working media is water Jie
When matter and oil medium, pressure bore dinPressureFor 6~8mm；When working media is steam medium and gas medium, in pressure pipe
Diameter dinPressureFor 4~6mm.
Connecting tube 2 uses screw nipple, and material of its material according to the choice of material of pressure pipe 1, with pressure pipe 1
It is consistent.Screw nipple is with internal diameter dinScrew thread, wall thickness δConnection, length LConnectionTubing based on processed, process spiral shell
Line nominal diameter dScrew thread, reach LScrew threadThread segment, both ends equal length of the thread segment away from screw nipple.It is threadedly coupled
The both ends of pipe need to process 45 °~60 ° of tilt angle of welding groove, length 3mm.Set screw nipple internal diameter with take
Pressure pipe internal diameter is equal, i.e. dinScrew thread=dinPressure, the wall thickness of basic tubing is chosen for 3 times of pressure thickness of pipe wall, i.e. δConnection=3 ×
δPressure, the length L of basis tubing when practical applicationConnectionIt can be taken as 16mm, screw thread nominal diameter dScrew threadConfirm as the following formula, i.e. dScrew thread=
dinScrew thread+2×δConnection, screw pitch is 1.5mm or 1.25mm, and screw pitch occurrence is determined according to screw thread nominal diameter according to national standard.
Two kinds of screw pitch all exist under such as nominal diameter, then preferred screw pitch is 1.5mm, and reach LScrew threadIt can be taken as 10mm.
The material of flat mouth threeway pressure head is consistent according to the choice of material of pressure pipe 1 with the material of pressure pipe 1, is put down
Mouth threeway pressure head is that internal diameter is dinThreewayEqual tee, threeway be responsible for internal diameter be dinThreeway, supervisor's wall thickness is δThreeway supervisor, supervisor
Length is LThreeway supervisor, tee branch internal diameter is dinThreeway, branch thickness of pipe wall is δTee branch, branch length of tube is LTee branch, branch length of tube refers to
It is from supervisor's center line to the length of tee branch interface, the internal diameter of equal tee is equal with 1 internal diameter of pressure pipe, i.e. dinThreeway=
dinPressure, it is responsible for wall thickness and is chosen for 1.3 times not less than pressure thickness of pipe wall, i.e. δThreeway supervisor≥1.3×δPressure, branch thickness of pipe wall is chosen for
Not less than 1.7 times of pressure thickness of pipe wall, i.e. δTee branch≥1.7×δPressure, it is responsible for length LThreeway supervisorConfirm as the following formula, i.e. LThreeway supervisor=
dinThreeway+2×δTee branch, branch length of tube LTee branchConfirm as the following formula, i.e. LTee branch=0.5 × dinThreeway+2.5×δPressure。
The material of pressure acquiring mechanism 4 is consistent according to the choice of material of pressure pipe with the material of pressure pipe.Pressure acquiring mechanism point
For linkage section and buffer chamber.Need to process 45 ° of tilt angle of changeover portion between linkage section and buffer chamber outer surface.Connection
It is connected between surface by the nature transition of aperture difference inside section and buffer chamber.
One end that buffer chamber is not connect with linkage section is defined as pressure acquiring mechanism buffer chamber outer end face, outer end face wall thickness
δBuffer end.Using outer end face geometric center as the center of circle, diameter d is processedBuffer endThrough-hole.Wall thickness δBuffer endConfirm as the following formula, i.e. δBuffer end=
1.8×δPressure.Diameter dBuffer endConfirm as the following formula, i.e. dBuffer end=dinPressure.Pressure acquiring mechanism linkage section outer surface is outside diameter d outLinkage section's
Cylindrical body, length are selected as 10mm.The linkage section outside diameter d out of pressure acquiring mechanismLinkage sectionConfirm as the following formula, i.e. doutLinkage section=dScrew thread+3.5
×δPressure.The inner surface of the linkage section of pressure acquiring mechanism is nominal diameter dScrew threadThreaded hole, length is selected as 10mm.The company of pressure acquiring mechanism
The screw pitch for connecing section threaded hole matches with the screw pitch for being threadedly coupled pipe screw thread.The buffer chamber inner surface of pressure acquiring mechanism is diameter
dinBuffer chamberCylindrical chamber, length is selected as LinBuffer chamber.Diameter dinBuffer chamberConfirm as the following formula, i.e. dinBuffer chamber=LThreeway supervisor+
dinPressure.Length LinBuffer chamberConfirm as the following formula, i.e. LinBuffer chamber=LTee branch+1.5×dinPressure+δThreeway supervisor+1mm.Pressure acquiring mechanism
Buffer chamber outer surface is positive hexagonal column, and the inscribed circle diameter of positive hexagonal column is doutBuffer chamber, length is
LoutBuffer chamber.Inscribed circle diameter doutBuffer chamberConfirm as the following formula, i.e. doutBuffer chamber=dinBuffer chamber+2×δBuffer end.Length
LoutBuffer chamberConfirm as the following formula, i.e. LoutBuffer chamber=LinBuffer chamber+δBuffer end+1mm。
The material of short baffle plate 5 is consistent according to the choice of material of pressure pipe 1 with the material of pressure pipe 1.Short baffle plate
5 choose wall thickness as δShort baffle plateSquare metal plate, the wall thickness δ of baffle plateShort baffle plateConfirm as the following formula, i.e. δShort baffle plate=2 × δPressure.Short folding
The height H of flowing plateShort baffle plateConfirm as the following formula, i.e. HShort baffle plate=0.29 × doutBuffer chamber+dinPressure.The width W of short baffle plateShort baffle plateIt presses
Following formula confirmation, i.e. WShort baffle plate=doutBuffer chamber.On above-mentioned square metal plate, bottom side length W is cut offShort baffle plate, 30 ° of base angle, wall thickness
δShort baffle plateIsosceles triangle body formed installation cavity.
The material of pitman 6 is consistent according to the choice of material of pressure pipe 1 with the material of pressure pipe 1.Pitman is chosen
The bar of diameter of phi 3, pitman quantity are 3, the length L of pitmanPitmanConfirm as the following formula, i.e. LPitman=1.2 × dinPressure。
The material of long baffle plate 7 is consistent according to the choice of material of pressure pipe 1 with the material of pressure pipe 1.Long baffle plate
7 choose wall thickness as δBaffle plateSquare metal plate, the wall thickness δ of long baffle plateBaffle plateConfirm as the following formula, i.e. δBaffle plate=2 × δPressure.Long folding
The height H of flowing plateBaffle plateConfirm as the following formula, i.e. HBaffle plate=1.2 × doutBuffer chamber+dinPressure.The width W of long baffle plateBaffle plateAs the following formula
Confirmation, i.e. WBaffle plate=doutBuffer chamber。
One end of screw nipple and pressure pipe are welded, by the other end of screw nipple and flat mouth threeway pressure head
Branch pipe welding.Downward by a wedge angle of the hexagon body of the buffer chamber part of pressure acquiring mechanism, by the triangular fovea of short baffle plate
Sunken side upward, the buffer chamber part of short baffle plate and pressure acquiring mechanism is cooperated and is welded, and cooperation is located proximate to pressure acquiring mechanism
Buffer chamber outer end face, so that short baffle plate is concordant with pressure acquiring mechanism buffer chamber outer end face.
3 pitmans are respectively welded in pressure acquiring mechanism buffer chamber outer end face, three pitmans are evenly arranged, press from both sides two-by-two
Angle is 120 °.Long baffle plate and three pitmans weld, and need to guarantee the relative position of long baffle plate and pressure acquiring mechanism, cushion chamber
The separate one end connecting with linkage section in room is provided with the through-hole being connected to buffer chamber, is connected to inside through-hole and buffer chamber, and
It is arranged between three pitmans 6.In measurement, since pitman 6 is there is no blocking through-hole, working media is drawn by baffle plate
It leads and forms buffering after entering through-hole in buffer chamber, and be not directly impinging flat mouth threeway pressure head, i.e. flat mouth threeway
The nozzle of pressure head opens up position not towards through-hole face in the wall surface of pressure head, prevents the flow velocity of working media from tying to measurement
Fruit impacts, and the pipeline that pressure is introduced through by fluid after the buffering of buffer chamber passes to pressure sensor and obtains
Signal is obtained, accurate static pressure numerical value is obtained, cooperation total pressure measurement passes through calculation formula, that is, obtains the static pressure in the complex flowfield
Flow velocity.
Downward by pressure acquiring mechanism and the wedge angle of short baffle plate welding, keeping short baffling board width is WShort baffle plateSide it is horizontal.This
When, short baffling board width is equal with buffer chamber outer end face width, need to guarantee that, in width direction, short baffle plate just covers buffering
Chamber outer end face.In short transverse, the height and the face-down wedge angle in pressure acquiring mechanism buffer chamber outer end of short baffle plate lower edges
End height it is equal.
The welding body of pressure pipe, screw nipple, flat mouth threeway pressure head is connect with pressure acquiring mechanism, flat mouth threeway pressure
Head is towards pressure acquiring mechanism inner cavity chamber, by the threaded hole for being threaded into pressure acquiring mechanism linkage section of screw nipple, until screw thread connects
The end of thread of adapter tube just submerges screw thread hole site, and pressure pipe is connect with pressure sensor, is used for pressure measurement.
The present apparatus, which is installed on complicated transition flow field domestic demand, will measure the position of flow velocity, and pressure pipe and pressure sensor are connected
It connects, pressure sensor measurement gained pressure is local static pressure PIt is quiet, unit is Pa.Pressure pipe is individually placed at needs and measures stream
The position of speed, and the pressure tappings of pressure pipe are met to the direction for needing to obtain flow velocity, pressure pipe is connect with pressure sensor, is pressed
Pressure obtained by force sensor measuring is the total pressure P of the local directionEntirely, unit is Pa, and fluid density ρ, unit is kg/m3,
And static pressure flow velocity measure formula is u=[2 × (P in complex flowfieldEntirely-PIt is quiet)/ρ]0.5, calculate, can flow in this way
In the continually changing complicated transition flow field in body flow direction, transition dynamic pressure is effectively shielded under the conditions of various fluid flow directions
It influences, cooperates static pressure in pressure sensor real-time measurement complexity transition flow field, and according to the difference of static pressure and total pressure, calculate stream
Specific position real-time flow rate in provides basis for flow field measuring and calculating.It is mountable in tested flow field, and structure is simple, and performance is steady
It is fixed, can be with real-time measurement static pressure, and calculate real-time flow rate at this.It can be used for specific location in real-time measurement complexity transition flow field
Static pressure, it may also be used for the measuring and calculating in flow field.
Above-described specific embodiment has carried out further the purpose of the present invention, technical scheme and beneficial effects
It is described in detail, it should be understood that being not intended to limit the present invention the foregoing is merely a specific embodiment of the invention
Protection scope, all within the spirits and principles of the present invention, any modification, equivalent substitution, improvement and etc. done should all include
Within protection scope of the present invention.
Claims (8)
1. static pressure measurement device in a kind of complex flowfield, which is characterized in that including pressure pipe (1), connecting tube (2), pressure head
(3), pressure acquiring mechanism (4) and baffle plate, the pressure head (3) are arranged in pressure acquiring mechanism (4), and connecting tube (2) setting is taking
Between pressure pipe (1) and pressure head (3) and the both ends of connecting tube (2) are connect with pressure pipe (1) and pressure head (3) respectively, connecting tube
(2) the end setting connecting with pressure head (3) is internal in pressure acquiring mechanism (4), and connecting tube (2) is connect with pressure acquiring mechanism (4),
Baffle plate and pressure acquiring mechanism (4) are fixed, and pressure pipe (1), connecting tube (2), pressure head (3) and pressure acquiring mechanism (4) successively connect
It is logical；The baffle plate includes long baffle plate (7) and short baffle plate (5), and short baffle plate (5) is fixed on the outer wall of pressure acquiring mechanism (4)
On, long baffle plate (7) setting is in the one end of pressure acquiring mechanism (4) far from pressure pipe (1), in long baffle plate (7) and pressure acquiring mechanism (4)
Between be provided with pitman (6), and pitman (6) simultaneously connect with long baffle plate (7) and pressure acquiring mechanism (4).
2. static pressure measurement device in a kind of complex flowfield according to claim 1, which is characterized in that the short baffle plate
(5) installation cavity is formed with pressure acquiring mechanism (4) fixed concave side wall, and the wall surface of installation cavity is corresponding on pressure acquiring mechanism (4)
Outer wall seamless fix.
3. static pressure measurement device in a kind of complex flowfield according to claim 1, which is characterized in that the pitman (6)
Quantity be three, and three connect with long baffle plate (7) and pressure acquiring mechanism (4), and three pitmans (6) are evenly arranged, two
Two angles are 120 °.
4. static pressure measurement device in a kind of complex flowfield according to claim 1, which is characterized in that the pressure pipe (1)
One end far from connecting tube (2) is connected with pressure sensor.
5. static pressure measurement device in a kind of complex flowfield according to claim 1, which is characterized in that the pressure acquiring mechanism
It (4) include linkage section and buffer chamber, and linkage section and buffer chamber are connected as overall structure and are interconnected, pressure head (3)
It is arranged in buffer chamber, connecting tube (2) is arranged in linkage section and screws with the inner thread of linkage section.
6. static pressure measurement device in a kind of complex flowfield according to claim 5, which is characterized in that the buffer chamber is remote
It is provided with the through-hole being connected to buffer chamber from the one end connecting with linkage section, is connected to inside through-hole and buffer chamber, and be arranged
Between three pitmans (6).
7. static pressure measurement device in a kind of complex flowfield as claimed in any of claims 1 to 6, which is characterized in that
The pressure head (3) is flat mouth threeway pressure head (3), and the branch pipe of flat mouth threeway pressure head (3) and connecting tube (2) are far from pressure pipe
(1) one end is fixed and is connected to.
8. flow velocity measuring method in a kind of complex flowfield, which is characterized in that
U=[2 × (PEntirely-PIt is quiet)/ρ]0.5m/s
Wherein: PEntirelyWhen being individually placed at the position for needing to measure flow velocity for pressure pipe, the pressure tappings of pressure pipe, which are met to needs, to be obtained
The direction of flow velocity, pressure sensor measurement gained pressure when pressure pipe is connect with pressure sensor, unit is Pa；
PIt is quietWhen the position of flow velocity will be measured by being installed on complicated transition flow field domestic demand for the present apparatus, pressure pipe is connect with pressure sensor
When pressure sensor measurement gained pressure, unit is Pa；
ρ is fluid density, and unit is kg/m3。
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| CN109029835B (en) * | 2018-06-07 | 2021-06-08 | 中广核研究院有限公司 | Hydrostatic pressure measuring device |
| CN109696270B (en) * | 2018-12-27 | 2024-03-05 | 上海理工大学 | Pressure taking device, pressure measuring equipment and pressure difference measuring equipment |
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| US4137781A (en) * | 1977-11-04 | 1979-02-06 | Waukesha-Pearce Industries, Inc. | Device for measuring the static pressure of a moving fluid |
| CN1834591A (en) * | 2006-04-18 | 2006-09-20 | 西安中望流量仪表有限公司 | Built-in conical throttling gear |
| CN203849277U (en) * | 2014-05-29 | 2014-09-24 | 湖南科技大学 | Outdoor actual measurement apparatus for quickly and freely switching signals with limited data acquisition systems |
| CN204085773U (en) * | 2014-09-28 | 2015-01-07 | 天津市南锋科技有限责任公司 | A kind of fluid data gathering-device |
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| CN106546374A (en) | 2017-03-29 |
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