CN218445553U - Device for detecting building space airflow field - Google Patents
Device for detecting building space airflow field Download PDFInfo
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- CN218445553U CN218445553U CN202221863214.8U CN202221863214U CN218445553U CN 218445553 U CN218445553 U CN 218445553U CN 202221863214 U CN202221863214 U CN 202221863214U CN 218445553 U CN218445553 U CN 218445553U
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- 239000007788 liquid Substances 0.000 claims abstract description 69
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- 238000001514 detection method Methods 0.000 claims abstract description 6
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- 238000012544 monitoring process Methods 0.000 claims 1
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- 239000011521 glass Substances 0.000 description 9
- 238000003756 stirring Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 3
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- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 3
- 229910010271 silicon carbide Inorganic materials 0.000 description 3
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- 238000006073 displacement reaction Methods 0.000 description 2
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- 229910052710 silicon Inorganic materials 0.000 description 2
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- 230000009286 beneficial effect Effects 0.000 description 1
- 230000001808 coupling effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
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Abstract
The utility model relates to a device for detecting building space air flow field belongs to air flow field simulation technical field, has solved prior art and has used liquid to detect the air flow field of stable state and can't detect the instantaneous flow state's that the air flow field receives wind-heat interference problem when carrying out the simulation detection to the air flow field in the building space. The utility model discloses a device for detecting building space air flow field, include: a liquid storage tank, an adjusting tank, a model and a pipeline; the output side of the liquid storage tank is connected with the input side of the adjusting tank, and the model is connected with the input side of the adjusting tank; the model comprises a model main body, a heating device, a trace particle emitting device and a PIV laser particle velocimeter; the pipeline is arranged above the model main body, the model main body is communicated with the pipeline, and the model main body and the pipeline are used for simulating the air flow movement inside and on the upper part of the building space. The utility model provides a device for detecting building space air flow field can detect the instantaneous flow state of air flow field under the wind-heat interference.
Description
Technical Field
The utility model belongs to the technical field of the air current simulation technique and specifically relates to a device for detecting building space air flow field.
Background
The study of the airflow field in the building space mainly depends on model experiments, and generally utilizes a closed liquid circulation device: simulating gas flow by using liquid as a flowing medium; the specific operation is as follows: firstly, a set of closed liquid circulation device is built according to the structural size of a building space by utilizing the similarity principle in fluid mechanics, and the temperature and the liquid flow rate of liquid in the device are used as control targets, so that the change of an air flow field in the building space is simulated; the simulation research on the building space airflow field is mainly applied to mastering the urban air condition and realizing the prediction of the urban street valley gas flow field so as to provide scientific reference for urban design and optimization.
At the present stage, a model experiment aiming at the research of the building space airflow field can only realize the prediction of a steady-state environment, the transient fluctuation condition of the airflow field of the building space under the interference of two external factors of heat and wind cannot be simulated, and the unsteady coupling effect of wind and heat external disturbance on the building space cannot be explained, so that the simulation result is inaccurate due to the fact that the instantaneous state of the airflow field in the building space cannot be predicted in the prior art, the accurate prediction of the airflow field of a city valley under the unsteady wind-heat environment cannot be realized, the application range is narrow, and the practicability is low.
SUMMERY OF THE UTILITY MODEL
In view of the above analysis, the present invention aims to provide a device for detecting an airflow field of a building space, which solves the problems of the prior art, such as the inaccuracy of the instantaneous state, the simulation result, and the narrow application range of the airflow field of the building space.
The purpose of the utility model is realized mainly through the following technical scheme:
an apparatus for detecting an airflow field in a building space, comprising: a liquid storage tank, an adjusting tank, a model and a pipeline; the output side of the liquid storage tank is connected with the input side of the adjusting tank, and the model is connected with the input side of the adjusting tank; the model comprises a model main body, a heating device, a trace particle emitting device and a PIV laser particle velocimeter; the pipeline is arranged above the model main body, the model main body is communicated with the pipeline, and the model main body and the pipeline are used for simulating the air flow movement inside and on the upper part of the building space.
Further, the method also comprises the following steps: a power pump; the power pump is arranged between the liquid storage tank and the adjusting tank.
Furthermore, the adjusting box is provided with a box body and a filter screen; the filter screen is fixed in the box for adjust the liquid flow in the box.
Further, a cooling device, a temperature sensor and a temperature measuring instrument are arranged in the liquid storage tank; the cooling device can cool the circulating liquid in the device and can maintain the temperature of the liquid in the device to be constant; the temperature sensor is used for measuring the temperature of the liquid; the temperature measuring instrument realizes temperature detection through a temperature sensor.
Furthermore, the device also comprises an adjusting valve which can adjust the flow of the liquid in the pipeline.
Furthermore, the tracer particle emission device is arranged on a pipeline on the input side of the model main body, and tracer particles can be emitted into the model main body.
Furthermore, the PIV laser particle velocimeter can monitor the motion track of the trace particles.
Further, the temperature sensor is a K-type thermocouple.
Furthermore, the exhaust valve is further included, and the exhaust valve can exhaust gas in the pipeline.
Furthermore, a contraction pipe is arranged in the box body; the contraction pipe is communicated with the outlet of the box body.
Compared with the prior art, the utility model discloses can realize one of following beneficial effect at least:
(1) The utility model discloses a device for detecting building space air flow field, but the analog detection goes out the transient state in building space air flow field, and the accuracy is high.
(2) The utility model discloses a device for detecting building space air current field, the adjustable liquid velocity of flow of power pump, the adjustable liquid heating temperature of heating device to receive the instantaneous state of air current field under the wind-heat dual interference in the simulation building space.
(3) The utility model discloses a device for detecting building space air current field utilizes the PIV laser particle tachymeter to shoot and data processing the tracer particle in to the device, can obtain the instantaneous motion image of simulation liquid.
(4) The utility model discloses a device for detecting building space air flow field, the shrink tube in the regulating box can be adjusted the liquid flow state in the pipeline for the liquid that gets into in the model flows steadily, improves the simulation and detects the accuracy.
The utility model discloses in, can also make up each other between the above-mentioned each technical scheme to realize more preferred combination scheme. Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and drawings.
Drawings
The drawings are only for purposes of illustrating particular embodiments and are not to be construed as limiting the invention, wherein like reference numerals are used to designate like parts throughout the drawings.
Fig. 1 is a block diagram of a device for detecting an air flow field in a building space.
Reference numerals:
1-a liquid storage tank; 2-a power pump; 3-a flow meter; 4-a regulating box; 41-a box body; 42-a filter screen; 43-shrink tube; 5-model; 51-a model body; 52-PIV laser particle velocimeter; 6-stirring the box; 7-adjusting valve; 8-exhaust valve.
Detailed Description
The following detailed description of the preferred embodiments of the invention, which is to be read in connection with the accompanying drawings, forms a part of this application, and together with the embodiments of the invention, serve to explain the principles of the invention.
The embodiment discloses an apparatus for measuring a flow field and a temperature field of a building space, as shown in fig. 1, comprising: the device comprises a liquid storage tank 1, a power pump 2, a flowmeter 3, an adjusting tank 4, a model 5, a stirring tank 6, an adjusting valve 7 and an exhaust valve 8; the devices form a circle through pipelines to form a closed-loop device, and liquid can circularly flow in the device.
The liquid storage tank 1 is provided with a drainage tube for leading liquid into the liquid storage tank 1; a cooling device, a temperature sensor and a temperature measuring instrument are arranged in the liquid storage tank 1; the cooling device is used for cooling the circulating liquid in the device and can maintain the temperature of the liquid in the device to be constant; the temperature sensor is a K-type thermocouple and is used for measuring the temperature of the liquid; the temperature measuring instrument realizes temperature detection through the temperature sensor.
The power pump 2 is arranged on the output side of the liquid storage tank 1, can pump the liquid in the liquid storage tank 1 into the device, does not provide power for the liquid flow in the pipeline, and can also adjust the flow rate of the liquid.
The flowmeter 3 is provided on the output side of the power pump 2 for detecting the flow rate of the liquid.
The device is provided with a vertical pipe, and the exhaust valve 8 is arranged at the highest point of the vertical pipe and used for exhausting gas in the pipe and reducing the influence of bubbles on a flow field.
The regulating box 4 is provided on the output side of the flow meter 3, and is used for regulating the liquid flow state so that the liquid entering the mold 5 flows smoothly, and includes a box body 41, a screen 42, and a shrink tube 43.
The tank 41 is provided with a plurality of inlets, which can divide the liquid in the pipeline, increase the inflow speed on the tank 41, and reduce the inflow vortex of the liquid.
Optionally, the regulating valves 7 are arranged at the inlet of the tank 41, the input side of the flow meter 3 and the input side of the liquid storage tank 1, so that the flow state of the liquid at the inlet of the tank 41, the flow meter 3 and the liquid storage tank 1 can be flexibly regulated.
A contraction pipe 43 is arranged in the box body 41, one end of the contraction pipe 43 is an inlet, the other end of the contraction pipe 43 is an outlet, and the aperture of the inlet is larger than that of the outlet; the inside of the contraction tube 43 is provided with a channel which is communicated with the inlet and the outlet, and the aperture of the channel is transited from the inlet aperture to the outlet aperture, so that the liquid in the tube is gradually stable.
One or more filter screens 42 are arranged inside the box body 41, and the liquid in the box body 41 is changed into uniform turbulent flow by utilizing a net structure; a screen 42 is fixed to the inner wall of the casing 41 opposite the inlet of the shrink tube 43.
The model 5 is arranged on the output side of the adjusting box 4 and used for simulating a building space; the model 5 comprises a model main body 51, a heating device, a trace particle emitting device and a PIV laser particle velocimeter.
The model main body 51 is communicated with a pipeline, and the pipeline is arranged above the model main body 51, so that the air flow movement in and above the building space can be conveniently simulated.
The heating device is arranged on the outer wall of the model main body 51 and comprises an infrared silicon carbide heater, a temperature sensor and a temperature measuring instrument.
A programmable controlled silicon voltage regulator is arranged on the infrared silicon carbide heater, and the temperature of each wall surface of the model main body 51 is independently regulated by regulating the input voltage of the heater through the controlled silicon voltage regulator; the outer wall of the model main body 51 where the infrared silicon carbide heater is located is provided with a temperature sensor and a temperature measuring instrument for temperature detection.
The temperature measuring instrument is a four-channel handheld temperature measuring instrument, and is convenient to operate.
The tracer particle emission device is provided with a plurality of glass tubes which are arranged in parallel, and tracer particles are filled in the glass tubes; the glass tubes are coplanar, and the surfaces of the glass tubes are vertical to the pipeline; a push rod is arranged in the glass tube, the end of the push rod is a piston head, and the rod body is pushed to enable the piston head to extrude trace particles out of the glass tube, so that the trace particle emission is realized; the pipeline on the input side of the model 5 is provided with round holes the number of which is the same as that of the glass tubes, and the round holes are used for inserting the glass tubes on the tracer particle emitting device, so that tracer particles in the glass tubes follow liquid in the pipeline to flow into the model 5, and the liquid flow field in the model 5 is visualized.
The PIV laser particle velocimeter is used for shooting the transient motion of the liquid in the model 5 and processing the shot data to obtain liquid flow state data so as to detect the liquid flow state in the model 5; the PIV laser particle velocimeter comprises a laser, a signal synchronous controller, a light guide arm and a PIV camera; the laser is used for emitting laser to display the trace particles in the pipeline; the light guide arm is used for adjusting the laser position emitted by the laser; the PIV camera is used for photographing the tracer particles irradiated by the laser; the signal synchronization controller is used for synchronizing the time sequence control of the whole device, is provided with PIV data processing software, can process the shot pictures to form tracer particle displacement images, namely, effective tracer particle displacement images are established according to corresponding particles in two adjacent frames of pictures to realize the cross-correlation processing of the images, and when the time interval is small enough, the average particle speed can be used for expressing the instantaneous speed of the point, so that the instantaneous flow field distribution can be obtained.
Optionally, the model main body 51 of the model 5 is made of a light reflection preventing material, and black rough paint is sprayed on the wall surface of the model main body 51, so that interference on the display of the trace particles due to light reflection of the wall surface of the model main body 51 is avoided.
Optionally, an anti-permeation layer is sprayed on the wall surface of the model main body 51, so that liquid is prevented from permeating into the wall of the model main body 51, and the liquid flowing form in the model main body 51 is influenced, so that the experimental result is inaccurate.
The stirring box 6 is arranged on the output side of the model 5 and is opened, so that gas in the pipeline can be conveniently discharged, the liquid pressure is stabilized, and liquid can flow fully.
Optionally, 6 inside motors and the impeller of being equipped with of agitator tank, the impeller mounting is on the motor, make motor drive impeller rotation, the adjustable rotational speed of motor, thereby strengthen the liquid mixing to 6 inside of agitator tank through impeller rotation, can make the gas in the device get rid of more thoroughly, can also be to the tracer particle stirring that gets into agitator tank 6, be convenient for the tracer particle can accurately show the mobile form of liquid in the model 5 after the circulating device gets into in the model 5 once more, improve simulation experiment's accuracy, still can be through the power that the mode of strengthening liquid surge increases the liquid in the agitator tank 6 and returns liquid reserve tank 1 from agitator tank 6, and the efficiency is improved.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention should be covered by the present invention.
Claims (10)
1. An apparatus for detecting an airflow field in a building space, comprising: the device comprises a liquid storage tank (1), an adjusting tank (4), a model (5) and a pipeline;
the output side of the liquid storage tank (1) is connected with the input side of the adjusting tank (4), and the model (5) is connected with the input side of the adjusting tank (4);
the model (5) comprises a model main body (51), a heating device, a trace particle emitting device and a PIV laser particle velocimeter;
the pipeline is arranged above the model main body (51), the model main body (51) is communicated with the pipeline, and the model main body (51) and the pipeline are used for simulating the air flow movement inside and above the building space.
2. The apparatus of claim 1, further comprising: a power pump (2); the power pump (2) is arranged between the liquid storage tank (1) and the adjusting tank (4).
3. Device according to claim 1, characterized in that the conditioning tank (4) is provided with a tank (41), a sieve (42);
the filter screen (42) is fixed in the box body (41) and is used for adjusting the liquid flow in the box body (41).
4. The device according to claim 1, characterized in that the inside of the tank (1) is provided with a cooling device, a temperature sensor and a temperature measuring instrument; the cooling device can cool the circulating liquid in the device and can maintain the temperature of the liquid in the device constant; the temperature sensor is used for measuring the temperature of the liquid; the temperature measuring instrument realizes temperature detection through the temperature sensor.
5. The device according to claim 4, characterized in that it further comprises a regulating valve (7) able to regulate the flow of liquid in the conduit.
6. The apparatus according to claim 5, characterized in that said tracer particle emitting means are provided on the input side of the model body (51) on a pipeline capable of emitting tracer particles inside the model body (51).
7. The apparatus of claim 6, wherein said PIV laser particle velocimeter is capable of monitoring the trajectory of motion of said tracer particles.
8. The device of claim 7, wherein the temperature sensor is configured as a type K thermocouple.
9. The device according to claim 8, characterized by further comprising an exhaust valve (8), said exhaust valve (8) being capable of exhausting gas in the pipeline.
10. A device according to claim 3, characterized in that a shrink tube (43) is provided in the box (41); the contraction pipe (43) is communicated with the outlet of the box body (41).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221863214.8U CN218445553U (en) | 2022-07-06 | 2022-07-06 | Device for detecting building space airflow field |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221863214.8U CN218445553U (en) | 2022-07-06 | 2022-07-06 | Device for detecting building space airflow field |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218445553U true CN218445553U (en) | 2023-02-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221863214.8U Expired - Fee Related CN218445553U (en) | 2022-07-06 | 2022-07-06 | Device for detecting building space airflow field |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218445553U (en) |
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2022
- 2022-07-06 CN CN202221863214.8U patent/CN218445553U/en not_active Expired - Fee Related
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Granted publication date: 20230203 |