CN111829750A - Split detachable sand-proof wind speed profile acquisition instrument - Google Patents

Split detachable sand-proof wind speed profile acquisition instrument Download PDF

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Publication number
CN111829750A
CN111829750A CN201910300482.5A CN201910300482A CN111829750A CN 111829750 A CN111829750 A CN 111829750A CN 201910300482 A CN201910300482 A CN 201910300482A CN 111829750 A CN111829750 A CN 111829750A
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CN
China
Prior art keywords
probe
pressure air
static pressure
acquisition instrument
air outlet
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Pending
Application number
CN201910300482.5A
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Chinese (zh)
Inventor
李宏
赵爱国
张耀南
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Cold and Arid Regions Environmental and Engineering Research Institute of CAS
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Cold and Arid Regions Environmental and Engineering Research Institute of CAS
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Application filed by Cold and Arid Regions Environmental and Engineering Research Institute of CAS filed Critical Cold and Arid Regions Environmental and Engineering Research Institute of CAS
Priority to CN201910300482.5A priority Critical patent/CN111829750A/en
Publication of CN111829750A publication Critical patent/CN111829750A/en
Pending legal-status Critical Current

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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
    • 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
    • G01M9/08—Aerodynamic models
    • 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
    • G01P5/14—Measuring speed of fluids, e.g. of air stream; Measuring speed of bodies relative to fluids, e.g. of ship, of aircraft by measuring differences of pressure in the fluid

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Engineering & Computer Science (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Aerodynamic Tests, Hydrodynamic Tests, Wind Tunnels, And Water Tanks (AREA)

Abstract

A split type detachable sand-proof wind speed profile acquisition instrument comprises a cylindrical sleeve, a measuring probe, a probe plug-in, a connecting piece and a packaging piece, wherein the probe plug-in is connected with the cylindrical sleeve through a fixing screw; the measuring probe is connected with the probe plug-in; 8-10 probe jacks are arranged on the probe plug-in unit, and the interval between the probe jacks is 2 mm-10 mm; the measuring probe is formed by combining a total pressure pipe and a static pressure pipe, and one end of the total pressure pipe is provided with a total pressure air inlet and a total pressure air outlet; one end of the static pressure pipe is provided with a static pressure air inlet and a static pressure air outlet; the static pressure air inlet is communicated with the static pressure air outlet; and the tail end of the measuring probe is provided with a baffle and a fixed screw. The invention is assembled according to the shape characteristics of the experimental detection model, can determine the proper height and determine the height of the measuring probe, greatly reduces the influence on the test of the airflow flow field on the surface of the model, greatly improves the precision of the measured data, avoids the data deviation caused by human factors due to the fact that the measurement is carried out for multiple times through multiple movements in the traditional flow field test, and realizes the measurement synchronism and the measurement consistency of the flow field in the wind tunnel.

Description

Split detachable sand-proof wind speed profile acquisition instrument
Technical Field
The invention relates to the technical field of physical research of sand blown by the wind, in particular to a split type detachable sand-proof wind speed profile acquisition instrument.
Background
Soil wind erosion is one of the main causes of land degradation in arid, semiarid and partially semimoist regions in north China, and the land degradation caused by soil wind erosion seriously affects the sustainable development of agriculture in these regions. Wind is the most direct power for causing soil wind erosion, and the wind erosion capacity is stronger when the wind speed is higher. Therefore, the research on the soil wind erosion needs to acquire an accurate wind speed profile of the atmospheric boundary layer near the surface.
In wind tunnel and field measurement, the differential pressure distribution characteristics of a vertically distributed wind speed flow field can be measured through the difference between a pressure value in a total pressure pipe facing the wind and a static pressure value in a static pressure pipe through a micro differential pressure sensor and a data acquisition instrument, and the speed value of the vertical distribution of the wind speed, namely the wind speed profile, is calculated. The characteristics of the wind speed profile are not only indispensable important links in measuring the flow of the airflow, but also have the important function in scientific research in the fields of environmental protection engineering, aerospace and aeronautics and the like.
The size of the wind speed profile acquisition instrument used in the current experimental detection is large, so that the airflow field of the testing environment is influenced. In addition, because the shape and the measurement height of the device are fixed and unchanged, the shapes of the detection models are different, and an anemometric profile measuring instrument with a suitable specification cannot be selected in experimental detection, so that the objectivity and the accuracy of experimental detection data are not high.
Disclosure of Invention
The invention aims to provide a split type detachable sand-proof wind speed profile acquisition instrument. In wind tunnel measurement, according to the shape characteristics and detection requirements of a detection model, an experimenter can automatically assemble an acquisition instrument and determine the vertical height of a measuring probe to be installed, and the total pressure and the static pressure of airflow are measured to determine the airflow speed, so that scientific and accurate data are provided for the research of wind sand physics, particularly the research of airflow flow speed measurement. Except this, the streamlined outward appearance of split type sand prevention wind speed profile collection appearance of dismantling has also reduced the air current flow field stability influence in detecting the environment to the experiment greatly, can satisfy the experiment needs and provide scientific and accurate detection data, simultaneously, with a plurality of this kind collection appearance interval certain distance, make up into the array, realize under the wind speed condition once, accomplish whole tests to model surface air current flow field characteristic, guaranteed the simultaneity and the uniformity of detection data.
The purpose of the invention is realized by the following technical scheme:
a split type detachable sand-proof wind speed profile acquisition instrument comprises a cylindrical sleeve, a measuring probe, a probe plug-in, a connecting piece and a packaging piece, wherein the probe plug-in is connected with the cylindrical sleeve through a fixing screw; the measuring probe is connected with the probe plug-in; 8-10 probe jacks are arranged on the probe plug-in unit, and the interval between the probe jacks is 2 mm-10 mm; the measuring probe is formed by combining a total pressure pipe and a static pressure pipe, and one end of the total pressure pipe is provided with a total pressure air inlet and a total pressure air outlet; one end of the static pressure pipe is provided with a static pressure air inlet and a static pressure air outlet; the static pressure air inlet is communicated with the static pressure air outlet; and the tail end of the measuring probe is provided with a baffle and a fixed screw.
The total pressure pipe is sleeved with the static pressure pipe.
The fixed screw is in threaded connection with a probe jack on the probe plug-in unit.
Furthermore, the total pressure air outlet is connected with a micro-pressure difference sensor and a data acquisition instrument through a hose to measure data.
Furthermore, the static pressure air outlet is connected with a micro-pressure difference sensor and a data acquisition instrument through a hose to measure data.
The connecting pieces are respectively connected with the connecting holes on the 2 cylindrical sleeves, so that the effect of assembling the 2 cylindrical sleeves is achieved, and the height of the wind speed profile acquisition instrument suitable for experimental requirements is realized.
The packaging part is connected with the connecting hole on the cylindrical sleeve to play a role in sealing.
The surface of the cylindrical sleeve is provided with a fixing hole, and the fixing hole is used for fixing the whole split type detachable sand-proof wind speed profile acquisition instrument.
The rear side of the cylindrical sleeve is provided with a through hole for connecting a hose of a measuring probe.
The height of the split detachable sand-proof wind profile acquisition instrument suitable for experimental requirements can be assembled by connecting the plurality of cylindrical sleeves through the connecting piece according to the shape characteristics of the experimental detection model.
And the number and the vertical height of the measuring probes are installed according to the test requirements, so that the air velocity measurement of the airflow field of the model surface with different vertical heights is realized.
The invention has the advantages and beneficial effects that:
1. the invention has simple structure, convenient assembly, firmness and durability, self-assembly according to the shape characteristics of the experimental detection model, determination of proper height and determination of the height of the measuring probe, and realization of very high detection precision within a certain measurement range; the streamline shape and the small volume greatly reduce the influence on the test of the airflow field on the surface of the model, and the precision of the measured data is greatly improved.
2. The invention is combined into an array form, and under the condition of primary wind speed, the air flow velocity vertical distribution is measured at different positions on the surface of the model at the same time, and the characteristics of the air flow field are determined, so that the data deviation caused by human factors due to the fact that the measurement is carried out for multiple times through multiple movements in the traditional flow field test is avoided, and the measurement synchronism and the measurement consistency of the flow field in the wind tunnel are realized.
3. The pressure difference value measured by the micro differential pressure sensor and the data acquisition instrument is converted into the airflow velocity value, so that the method is simple, quick, stable and reliable; simple operation and high scientific research value.
4. The invention is formed by combining all components, is convenient to carry and easy to assemble, can be popularized to field installation and test, and obtains more accurate scientific research data through scientific research.
Drawings
FIG. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a schematic view of the connector of the present invention.
Fig. 3 is a schematic diagram of the package of the present invention.
FIG. 4 is a schematic view of a probe insert of the present invention.
Fig. 5 is a schematic view of a cylindrical sleeve according to the present invention.
Fig. 6 is a schematic view of a measurement probe according to the present invention.
Detailed Description
The invention will be described in more detail with reference to the accompanying drawings, in which:
as shown in figure 1, a split type sand prevention wind speed profile collection appearance of dismantling, including cylindricality sleeve pipe 1, measuring probe 4, probe plug-in components 7, connecting piece 8 and packaging part 9, its characterized in that: the probe plug-in 7 is connected with the cylindrical sleeve 1 through a fixing screw 3; the cylindrical sleeve 1 is hollow, and connecting holes 2 are formed in two end faces of the cylindrical sleeve; one surface of the cylindrical sleeve 1 is provided with a slot, two sides of the slot are provided with threaded holes, and the reverse surface is provided with a through hole 6; the cylindrical sleeve 1 is also provided with a fixing hole 5; 8-10 probe jacks 10 are arranged on the probe plug-in 7, and the interval between the probe jacks 10 is 2 mm-10 mm; the measuring probe 4 is connected to a probe insert 7.
The measuring probe 4 is formed by combining a total pressure pipe 45 and a static pressure pipe 46, and one end of the total pressure pipe 45 is provided with a total pressure air inlet 41 and a total pressure air outlet 42; one end of the static pressure pipe 46 is provided with a static pressure air inlet 43 and a static pressure air outlet 44; the tail end of the measuring probe 4 is also provided with a baffle 12 and a fixed screw 11.
The total pressure pipe 45 is sleeved with a static pressure pipe 46.
The fixed screw 11 is screwed with the probe jack 10 on the probe plug 7.
Further, the total pressure air outlet 42 is connected with a micro-pressure difference sensor and a data acquisition instrument through a hose to measure data.
Further, the static pressure air outlet 44 is connected with a micro-pressure difference sensor and a data acquisition instrument through a hose to measure data.
The packaging part 9 is connected with the connecting hole 2 on the cylindrical sleeve 1 and plays a role of sealing.
The connecting piece 8 is respectively connected with the connecting holes 2 on the 2 cylindrical sleeves 1, so that the 2 cylindrical sleeves 1 are assembled, and the height of the wind speed profile acquisition instrument suitable for experimental requirements is realized.
The surface of the cylindrical sleeve 1 is provided with a fixing hole 5, and the fixing hole 5 is used for fixing the whole split type detachable sand-proof wind speed profile acquisition instrument.
The rear side of the cylindrical sleeve 1 is provided with a through hole 6, and the through hole 6 is used for connecting the flexible pipe of the measuring probe 4.
The height of the split detachable sand-proof wind profile acquisition instrument suitable for experimental requirements can be assembled by connecting the plurality of cylindrical sleeves 1 through the connecting piece 8 according to the shape characteristics of the experimental detection model.
And the quantity and the vertical height of the measuring probes 4 are installed according to the test requirements, so that the air velocity measurement of the airflow field of the model surface with different vertical heights is realized.
Examples
Firstly, connecting 5 cylindrical sleeves 1 through a connecting piece 8, packaging the cylindrical sleeves with a packaging piece 9, determining the vertical height of a measuring probe 4, connecting a total pressure air outlet 42 and a static pressure air outlet 44 of the measuring probe 4 with a hose, inserting the measuring probe 4 into a probe jack 10 on a probe plug-in unit 7, and fixing the measuring probe through a fixing screw 11; and then inserting a probe plug-in 7 connected with the measuring probe 4 along the slot of the cylindrical sleeve 1, connecting the probe plug-in 7 with the cylindrical sleeve 1 by screwing the fixing screw 3, and finally fixing the whole split type detachable sand-proof wind speed profile acquisition instrument by penetrating the fixing rod through the fixing hole 5.
One end of the hose is respectively connected with the total pressure air outlet 42 and the static pressure air outlet 44 of the measuring probe 4, and the other end of the hose is connected with the micro-differential pressure sensor and the data acquisition instrument through the through hole 6 behind the cylindrical sleeve 1, so that the wind speed measurement of different vertical heights on the surface of the model is realized, and data is stored through the micro-differential pressure sensor and the data acquisition instrument.
When the airflow blows to the measuring probe 4, the total pressure air inlet 41 is aligned with the inflow direction of the airflow fluid, the static pressure air inlet 43 is aligned with the outflow direction of the airflow fluid, and the difference between the total pressure and the static pressure is the measured differential pressure at the center of the pipeline. Therefore, the micro-pressure difference sensor and the data acquisition instrument connected with the total pressure air outlet 42 and the static pressure air outlet 44 can convert the measured vertical distribution value of the wind speed, and can accurately measure the flow speed change on different vertical height points, so as to obtain the wind speed profile characteristics of the model surface, thereby providing scientific and accurate detection data for the fields of hydrodynamics, aerodynamics, meteorology, wind and sand physics, environmental protection engineering, aerospace engineering and the like.

Claims (5)

1. The utility model provides a sand prevention wind speed profile collection appearance can be dismantled to split type, includes cylindricality sleeve pipe (1), measuring probe (4), probe plug-in components (7), connecting piece (8) and packaging part (9), its characterized in that: the probe plug-in (7) is connected with the cylindrical sleeve (1) through a fixing screw (3); the cylindrical sleeve (1) is hollow, and connecting holes (2) are formed in two end faces of the cylindrical sleeve; one surface of the cylindrical sleeve (1) is provided with a slot, two sides of the slot are provided with threaded holes, and the reverse surface is provided with a through hole (6); the cylindrical sleeve (1) is also provided with a fixing hole (5); 8-10 probe jacks (10) are arranged on the probe plug-in (7), and the interval between the probe jacks (10) is 2-10 mm; the measuring probe (4) is connected with a probe plug-in (7); the measuring probe (4) is formed by combining a total pressure pipe (45) and a static pressure pipe (46), a total pressure air inlet (41) and a total pressure air outlet (42) are arranged at one end of the total pressure pipe (45), a static pressure air inlet (43) and a static pressure air outlet (44) are arranged at one end of the static pressure pipe (46), and the static pressure air inlet (43) is communicated with the static pressure air outlet (44); the tail end of the measuring probe (4) is provided with a baffle (12) and a fixed screw (11); the fixed screw (11) is in threaded connection with a probe jack (10) on the probe plug-in (7); the total pressure air outlet (42) is connected with the micro-pressure difference sensor and the data acquisition instrument through a hose; and the static pressure air outlet (44) is connected with the micro-pressure difference sensor and the data acquisition instrument through a hose.
2. The split detachable sand-proof wind profile acquisition instrument according to claim 1, wherein: the packaging piece (9) is connected with the connecting hole (2) on the cylindrical sleeve (1) to play a role in sealing.
3. The split detachable sand-proof wind profile acquisition instrument according to claim 1, wherein: the connecting piece (8) is respectively connected with the connecting holes (2) on the 2 cylindrical sleeves (1) to play a role in assembling the 2 cylindrical sleeves (1).
4. The split detachable sand-proof wind profile acquisition instrument according to claim 1, wherein: the fixing hole (5) is used for fixing the whole split type detachable sand-proof wind speed profile acquisition instrument.
5. The split detachable sand-proof wind profile acquisition instrument according to claim 1, wherein: the through hole (6) is used for connecting the flexible pipe of the measuring probe 4.
CN201910300482.5A 2019-04-15 2019-04-15 Split detachable sand-proof wind speed profile acquisition instrument Pending CN111829750A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201910300482.5A CN111829750A (en) 2019-04-15 2019-04-15 Split detachable sand-proof wind speed profile acquisition instrument

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201910300482.5A CN111829750A (en) 2019-04-15 2019-04-15 Split detachable sand-proof wind speed profile acquisition instrument

Publications (1)

Publication Number Publication Date
CN111829750A true CN111829750A (en) 2020-10-27

Family

ID=72915728

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201910300482.5A Pending CN111829750A (en) 2019-04-15 2019-04-15 Split detachable sand-proof wind speed profile acquisition instrument

Country Status (1)

Country Link
CN (1) CN111829750A (en)

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