CN114252231A - Steam flow field measurement system in pipeline - Google Patents
Steam flow field measurement system in pipeline Download PDFInfo
- Publication number
- CN114252231A CN114252231A CN202111578931.6A CN202111578931A CN114252231A CN 114252231 A CN114252231 A CN 114252231A CN 202111578931 A CN202111578931 A CN 202111578931A CN 114252231 A CN114252231 A CN 114252231A
- Authority
- CN
- China
- Prior art keywords
- measurement
- module
- flow field
- measuring
- calculation
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000005259 measurement Methods 0.000 title claims abstract description 44
- 238000004364 calculation method Methods 0.000 claims abstract description 19
- 238000006243 chemical reaction Methods 0.000 claims abstract description 15
- 239000000523 sample Substances 0.000 claims description 13
- 238000000034 method Methods 0.000 claims description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000009530 blood pressure measurement Methods 0.000 description 2
- 238000012937 correction Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Images
Classifications
-
- 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
Abstract
The invention discloses a steam flow field measuring system in a pipeline, which comprises a main system, wherein the main system comprises: and the setting module is used for setting the model name, the working condition and the measuring point position parameters, and the computer displays the setting parameters. The invention has the advantages that the measurement module is provided with AD conversion, a universal interface is connected into the system, the system is not required to be inserted into a microcomputer, the measurement module is suitable for any PC microcomputer, the measurement data and the calculation result are stored in a data file form, the three-dimensional speed and pressure distribution condition of each measurement section can be displayed and printed in a data table or graphic mode at any time, a software package formed by a series of programs such as calibration, measurement, drawing, calculation and printing is equipped, the use is convenient and practical, the system calibration, printing and measurement can be carried out according to the will of a user, meanwhile, the multipoint pressure or flow velocity can be measured, the measurement module has multiple functions, the measurement time is shortened, and the measurement efficiency and the measurement precision are improved.
Description
Technical Field
The invention relates to the technical field of pipeline steam flow field measurement, in particular to a system for measuring a steam flow field in a pipeline.
Background
The flow field means that the velocity, the pressure and the like all change in one flow field. In the case of flight, caused by the motion of the aircraft; in the wind tunnel experiment, the model is put in the uniform linear airflow, and the model disturbs the airflow. The general term of the flow velocity field, the pressure field and the like on the time and space point coordinate field is defined by the flow velocity, the pressure and other functions of the fluid particle motion described by the Euler method. The spatial distribution of the air flow movement at a certain moment.
In a large thermodynamic system test, the distribution of the internal flow field of a high-temperature and high-pressure steam pipeline has an important influence on the steam distribution of downstream steam equipment of the pipeline, steam parameters at the outlet of the steam pipeline are important boundaries of downstream steam users, the internal flow field of the conventional steam pipeline is mainly subjected to simulation calculation through fluid analysis software, the calculation workload is large, and the calculation accuracy is difficult to verify.
At present, the existing steam flow field measurement system in the pipeline still has shortcomings, the existing steam flow field measurement system in the pipeline measures the pressure between holes by using a U-shaped micro-pressure meter for each measuring point, and needs a plurality of complicated data processing processes such as manual reading, graph checking, correction and the like, while the measurement of the distribution of the pipeline space flow field generally needs hundreds of points, the measurement time is long, the efficiency is low, and the measurement precision is low, so that the corresponding steam flow field measurement system in the pipeline is urgently proposed.
Disclosure of Invention
The invention aims to solve the problems and provides a steam flow field measuring system in a pipeline.
In order to achieve the purpose, the invention adopts the following technical scheme:
a system for measuring a vapor flow field in a pipe, comprising a primary system, the primary system comprising:
the setting module is used for setting model names, working conditions and measuring point position parameters, the computer displays the setting parameters, and all the parameters can be reset at any time according to actual conditions;
the measuring module is used for completing the measuring function, entering measurement after the setting is completed, continuously displaying the current measured value on a screen, and rotating the five-hole probe around the axis of the support handle to enable the key to collect data and stop measuring when the pressure difference sensor connected with the 4 and 5 holes is balanced;
the calculation module is used for calculating the acquired data, and is provided with an error checking program for automatically reporting errors and re-measuring in order to prevent errors, and the correct result of calculation is stored in a disk;
the output module is used for collecting the results of measurement and calculation, listing the results into a pressure distribution table and a speed distribution table or drawing a pressure distribution curve and a speed distribution curve, and storing or printing and outputting the results according to the will of an operator;
the measuring module consists of a five-hole probe, a differential pressure sensor, a conversion circuit module, an analog-to-digital conversion module and a PC (personal computer).
As a further description of the above technical solution:
integral AD-DA interface board adopted by conversion circuit module
As a further description of the above technical solution:
the main system stores the measurement data and the calculation result in a data file form, and displays and prints the three-dimensional speed and pressure distribution condition of each measurement section in a data table or graphic mode at any time.
As a further description of the above technical solution:
the main system adopts a full menu prompting selection working mode and a window display technology, and a user can work under the prompting of screen operation.
As a further description of the above technical solution:
the equilibrium state of the differential pressure sensor connected with the 4 holes and the 5 holes is P4-P5.
As a further description of the above technical solution:
the main system adopts a universal interface and does not need to be inserted in a microcomputer.
In summary, due to the adoption of the technical scheme, the invention has the beneficial effects that:
in the invention, a pressure analog signal detected by a five-hole probe is sent to a differential pressure sensor to be converted into a direct current electric signal, the direct current electric signal is adjusted by a conversion circuit, the direct current electric signal is input to an integrating AD-DA interface to be subjected to analog-digital conversion, a digital electric signal is output to be transmitted to a PC microcomputer to be processed and calculated, further, flow field measurement is completed, an optimized design circuit and a high-precision differential pressure sensor are adopted, temperature compensation measures are adopted, a pressure measurement system is stable and high in precision, 4-32 paths of pressure measurement data acquisition can be simultaneously carried out, a measurement module is provided with AD conversion, a universal interface is adopted to be connected into the system, the universal interface is not required to be inserted into a microcomputer, the universal interface is suitable for any PC microcomputer, measurement data and calculation results are stored in a data file form, the three-dimensional speed and pressure distribution conditions of each measurement section can be displayed and printed in a data table or graph mode at any time, and calibration, measurement, drawing, calibration, drawing, calibration, and the three-dimensional speed and the like, The software package that a series of procedures such as calculation printing constitute, convenient to use, practicality can carry out system calibration, printing and measurement according to user's wish, still can measure the multiple spot pressure or the velocity of flow simultaneously, has multiple functions concurrently, has shortened measuring time, has improved measurement of efficiency and measurement accuracy.
Drawings
FIG. 1 is a block diagram of a main system of the present invention;
FIG. 2 is a schematic diagram of the operation of the measurement module of the present invention;
FIG. 3 is a schematic diagram of a five-hole spherical probe structure according to the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The first embodiment is as follows:
referring to fig. 1-3, a system for measuring a steam flow field in a pipe includes a main system, the main system includes:
the setting module is used for setting model names, working conditions and measuring point position parameters, the computer displays the setting parameters, and all the parameters can be reset at any time according to actual conditions;
the measuring module is used for completing the measuring function, entering measurement after the setting is completed, continuously displaying the current measured value on a screen, and rotating the five-hole probe around the axis of the support handle to enable the key to collect data and stop measuring when the pressure difference sensor connected with the 4 and 5 holes is balanced;
the calculation module is used for calculating the acquired data, and is provided with an error checking program for automatically reporting errors and re-measuring in order to prevent errors, and the correct result of calculation is stored in a disk;
the output module is used for collecting the results of measurement and calculation, listing the results into a pressure distribution table and a speed distribution table or drawing a pressure distribution curve and a speed distribution curve, and storing or printing and outputting the results according to the will of an operator;
the measuring module consists of a five-hole probe, a differential pressure sensor, a conversion circuit module, an analog-to-digital conversion module and a PC machine.
The pressure analog signal detected by the five-hole probe is sent to a differential pressure sensor to be converted into a direct current electric signal, the direct current electric signal is adjusted by a conversion circuit, then the direct current electric signal is input to an integrating AD-DA interface to be subjected to analog-digital conversion, and a digital electric signal is output and is transmitted to a PC microcomputer to be processed and calculated, so that the flow field measurement is completed.
The five-hole spherical probe is placed in a gas flow field, when gas flows around and passes through five pressure-sensing holes with the inner diameters of 0.5mm on a probe spherical surface with the diameter of 5mm, a determined function relation exists between the pressure induced on the surface of the sphere and the gas movement direction, when the five-hole probe is rotated around a support axis to balance a differential pressure sensor connected with 4 holes and 5 holes (namely P4 is P5), the gas inflow direction is in a plane where the 1 hole, the 2 hole and the 3 hole are located and is symmetrical to the 4 hole and the 5 hole, and the included angle alpha between the inflow direction and the horizontal plane can be determined by utilizing the direction of a dial of the probe. According to the K beta-beta curve and the pressure values sensed by the holes 1, 2, 3 and 4 which are obtained by calibration in advance, another angle beta and correction coefficients K3, K1, K2, K4 and K2 can be calculated, and the model of the airflow speed can be obtained according to the calculated values:
the velocity components can be calculated at cylindrical coordinates as follows:
axial wind speed Uz ═ U | sin α cos β
Tangential wind speed Ut ═ U | cos α cos β
Radial wind speed Ur ═ U | sin β
The integral AD-DA interface board adopted by the conversion circuit module has high resolution, strong anti-interference capability and high measurement precision.
The main system stores the measured data and the calculation result in a data file form, and displays and prints the three-dimensional speed and pressure distribution condition of each measured section in a data table or graphic mode at any time.
The main system adopts a full menu prompting selection working mode and a window display technology, and a user can work under the prompting of screen operation, so that the system has the characteristics of simplicity, convenience, rapidness and flexibility.
4. The equilibrium state of the differential pressure sensor with 5-hole connection is P4-P5.
The main system adopts a general interface, does not need to be inserted in a microcomputer, and is suitable for any PC microcomputer.
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 person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (6)
1. A system for measuring a vapor flow field in a pipe, comprising a primary system, wherein the primary system comprises:
the setting module is used for setting model names, working conditions and measuring point position parameters, the computer displays the setting parameters, and all the parameters can be reset at any time according to actual conditions;
the measuring module is used for completing the measuring function, entering measurement after the setting is completed, continuously displaying the current measured value on a screen, and rotating the five-hole probe around the axis of the support handle to enable the key to collect data and stop measuring when the pressure difference sensor connected with the 4 and 5 holes is balanced;
the calculation module is used for calculating the acquired data, and is provided with an error checking program for automatically reporting errors and re-measuring in order to prevent errors, and the correct result of calculation is stored in a disk;
the output module is used for collecting the results of measurement and calculation, listing the results into a pressure distribution table and a speed distribution table or drawing a pressure distribution curve and a speed distribution curve, and storing or printing and outputting the results according to the will of an operator;
the measuring module consists of a five-hole probe, a differential pressure sensor, a conversion circuit module, an analog-to-digital conversion module and a PC (personal computer).
2. The in-pipe steam flow field measurement system of claim 1, wherein the conversion circuit module employs an integrating AD-DA interface board.
3. The system of claim 1, wherein the host system stores the measurement data and the calculation results in the form of data files, and displays and prints the three-dimensional velocity and pressure distribution of each measurement section in a data table or graphic manner at any time.
4. The in-duct steam flow field measurement system of claim 1, wherein the host system employs full menu prompt selection and window display techniques, and the user can operate at the prompt of screen operation.
5. The in-duct steam flow field measurement system of claim 1, wherein the equilibrium state of the 4, 5-orifice connected differential pressure sensor is P4-P5.
6. The in-duct steam flow field measurement system of claim 1, wherein the host system employs a universal interface without the use of a card in a microcomputer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111578931.6A CN114252231A (en) | 2021-12-22 | 2021-12-22 | Steam flow field measurement system in pipeline |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111578931.6A CN114252231A (en) | 2021-12-22 | 2021-12-22 | Steam flow field measurement system in pipeline |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114252231A true CN114252231A (en) | 2022-03-29 |
Family
ID=80794105
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111578931.6A Pending CN114252231A (en) | 2021-12-22 | 2021-12-22 | Steam flow field measurement system in pipeline |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114252231A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2242460Y (en) * | 1995-07-07 | 1996-12-11 | 清华大学 | Ball shaped multi-hole probe for three-D flowing field of automatic speed measuring device |
| CN106290968A (en) * | 2016-09-14 | 2017-01-04 | 华北电力科学研究院(西安)有限公司 | A kind of large space pulsatile flow field three-dimension measuring system and measuring method |
| CN109445362A (en) * | 2018-12-24 | 2019-03-08 | 西北工业大学 | A kind of five-hole probe measuring system of integrated nominal data |
| CN110514391A (en) * | 2019-08-12 | 2019-11-29 | 北京航空航天大学 | A kind of five pore pressure force probes measurement three-dimensional flow field uncertainty evaluation method |
-
2021
- 2021-12-22 CN CN202111578931.6A patent/CN114252231A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2242460Y (en) * | 1995-07-07 | 1996-12-11 | 清华大学 | Ball shaped multi-hole probe for three-D flowing field of automatic speed measuring device |
| CN106290968A (en) * | 2016-09-14 | 2017-01-04 | 华北电力科学研究院(西安)有限公司 | A kind of large space pulsatile flow field three-dimension measuring system and measuring method |
| CN109445362A (en) * | 2018-12-24 | 2019-03-08 | 西北工业大学 | A kind of five-hole probe measuring system of integrated nominal data |
| CN110514391A (en) * | 2019-08-12 | 2019-11-29 | 北京航空航天大学 | A kind of five pore pressure force probes measurement three-dimensional flow field uncertainty evaluation method |
Non-Patent Citations (1)
| Title |
|---|
| 清华大学热能工程系: "流体力学", 31 March 1980, 机械工业出版社, pages: 253 - 256 * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102712091A (en) | Embedded arm strain sensors | |
| CN107478382B (en) | Automatic detection device and detection method for pressure instrument | |
| CN106248044B (en) | A kind of bridge full-bridge Multi-point deflection real-time acquisition and display system | |
| CN205426386U (en) | Portable naval vessel thermal technology's parameter calibrating installation | |
| CN109443265A (en) | Assessment method based on polar angle dichotomizing search optimizing circumference equal dividing hole location | |
| CN107677317A (en) | Flue dust gas sampling comprehensive detection system | |
| CN113654447A (en) | Method and tool for quickly detecting coaxiality of assembly rack | |
| CN102128665B (en) | Device for detecting accuracy of mechanical water meter | |
| CN109115448A (en) | A kind of TT&C system suitable for small-sized wind tunnel | |
| CN106442857A (en) | Detection method and detection device for carbon dioxide emission based on oxygen content determination | |
| CN109238111B (en) | Intelligent rotating machinery centering instrument and operation method thereof | |
| CN114252231A (en) | Steam flow field measurement system in pipeline | |
| Nowack | Improved calibration method for a five-hole spherical Pitot probe | |
| Lepicovsky et al. | Past developments and current advancements in unsteady pressure measurements in turbomachines | |
| CN201081741Y (en) | Digital mining axial blower blast capacity measuring device | |
| CN105372288B (en) | A kind of rate of heat flow measuring instrument and measuring method | |
| CN209589904U (en) | A kind of high-precision gas sensor array detection device | |
| CN106768591B (en) | A kind of single-point survey pressure detector probe device resistant to high temperature | |
| JPH0723548A (en) | Method and equipment for centering turbine generator | |
| CN109029829B (en) | Method and system for calculating internal pressure of upper section of steam generator of nuclear power plant | |
| CN202255269U (en) | Digital readout displacement demarcation device for soil test | |
| Sahin et al. | The measurement of air-flow characteristics using a five-hole Pitot probe in conjunction with a microcomputer | |
| CN201867388U (en) | Full-automatic calibrating device for gas alarm | |
| CN205038228U (en) | Gaseous dynamic speed measurement record appearance | |
| Jakubowicz et al. | The measuring position designed to determine the metrological properties of air gauges |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |