A gas jet field analysis method, coordinate positioning method, analysis system

Abstract

The application provides a gas jet field analysis method, a coordinate positioning method and an analysis system, wherein the gas jet field analysis method comprises the following steps: acquiring parameter information of a jet device; starting the jet device based on the parameter information to obtain an experimental jet field; drawing a jet line based on the experimental jet field; determining the spatial coordinates of a sampling point based on the jet line; and sampling the spatial coordinates of the sampling point to analyze the characteristics of the experimental jet field. The spatial coordinates of the sampling point can be accurately positioned by drawing the jet line, the reliability is high, manual participation is not required, the experimental cost is reduced, and the safety is improved.

Description

Technical Field

[0001] This application belongs to the field of oil and gas explosion protection, specifically involving a gas jet field analysis method, coordinate positioning method, and analysis system. Background Technology

[0002] Industrial production environments contain many flammable and explosive gases, such as methane, ethane, propane, hydrogen, and carbon monoxide. Leaks of these gases can inevitably lead to fires and explosions with potentially catastrophic consequences. Therefore, researching and determining the flow field distribution characteristics of these flammable and explosive gases after a leak is crucial for precise control, monitoring and early warning, and emergency response measures. This is essential for effectively reducing the probability and severity of such gas fires and explosions.

[0003] Current research on the flow field distribution characteristics after a leak of flammable and explosive gases mainly relies on experimental testing, numerical simulation, or a combination of both. For high-pressure flammable and explosive gases, spontaneous combustion occurs upon leakage, making the study of their flow field distribution characteristics less practically meaningful. However, studying the flow field distribution characteristics after a leak of gases stored in medium- and low-pressure containers is crucial for accident prevention, especially explosion prevention. Currently, there is limited experimental research on the jet flow field distribution characteristics after a leak of medium- and low-pressure gases, primarily due to the difficulty of experimental testing. Existing research using high-precision optical instruments such as schlieren spectrometers is even rarer.

[0004] Existing methods for studying the spatial distribution characteristics of gas jet fields mainly fall into two categories: experimental and numerical simulation. One category involves experimental testing. However, this method currently either requires pre-arranged sampling points in the jet region or handheld testing. For pre-arranged sampling, the large number of sampling points significantly disturbs the jet field, greatly impacting test accuracy. For handheld testing, manual operation and the lack of precise positioning technology lead to significant discrepancies between the measured data and the expected locations, resulting in high randomness. For purely spectroscopic testing, the technology is not yet fully mature, and the results lack reliability. Furthermore, experimental testing methods are costly and pose certain risks and safety hazards. The other category involves fluid numerical simulation. However, for pressurized jet fields, due to the numerous influencing factors and the discrepancies between existing jet field pressure and expansion models and reality, relying solely on numerical simulation for gas jet field research lacks accuracy and reliability. Summary of the Invention

[0005] The purpose of this application is to provide a gas jet field analysis method, coordinate positioning method, and analysis system to solve or alleviate the problems existing in the prior art.

[0006] To achieve the above objectives, this application provides the following technical solution:

[0007] A method for analyzing a gas jet field includes: acquiring parameter information of a jet device; activating the jet device based on the parameter information to obtain an experimental jet field; drawing jet lines based on the experimental jet field; determining the spatial coordinates of a sampling point based on the jet lines; and sampling the spatial coordinates of the sampling point to analyze the characteristics of the experimental jet field.

[0008] Optionally, the jet device has a jet outlet to eject helium gas and form an experimental jet field; the acquisition of parameter information of the jet device includes: acquiring the pressure parameter of the jet outlet, the diameter radius of the jet outlet, and the mass parameter of the helium gas.

[0009] Optionally, the step of activating the jet device to obtain an experimental jet field based on the parameter information includes: activating the jet device to obtain a test jet field based on the parameter information; and adjusting the parameter information based on the test jet field to obtain the experimental jet field.

[0010] Optionally, the jet device includes: a helium storage tank 1, a helium pipeline 2, a jet channel 3, and a nozzle 4. The helium storage tank 1 is connected to the jet channel 3 via the helium pipeline 2, and the nozzle 4 is disposed on the jet channel 3. The step of activating the jet device to obtain an experimental jet field based on the parameter information includes: opening the valve 5 of the helium storage tank 1 based on the parameter information to transport helium through the helium pipeline 2 into the jet channel 3; and ejecting the helium through the nozzle 4 to obtain the experimental jet field.

[0011] Optionally, the jet line includes: a jet axis, a jet edge, and a jet angle line; drawing the jet line based on the experimental jet field includes: determining the jet axis of the experimental jet field; drawing the jet edge based on the edge of the experimental jet field; and drawing the jet angle line based on the jet axis and the jet edge.

[0012] Optionally, drawing the jet lines based on the experimental jet field includes: capturing the experimental jet field using a high-speed camera 12 to obtain an image of the experimental jet field; and drawing the jet lines based on the experimental jet field image.

[0013] Optionally, drawing the jet angle line based on the jet axis and the jet edge includes: obtaining a jet angle region based on the jet axis and the jet edge, wherein the angle of the jet angle region is α, and 0°≤α≤180°; and dividing the angle of the jet angle region into n equal parts based on the set test accuracy requirements to obtain the equal division angle α / n, wherein n≥1 and n is an integer.

[0014] The jet angle line is drawn based on the equally divided angle α / n.

[0015] Optionally, the spatial coordinates of the sampling points are sampled to analyze the experimental jet field characteristics, including:

[0016] The spatial coordinates of the sampling points are analyzed to obtain the experimental jet field characteristic parameters;

[0017] Based on the experimental jet field characteristic parameters, plot the experimental jet field characteristic parameter curves;

[0018] Based on the experimental jet field characteristic curve, the characteristics of the experimental jet field are analyzed.

[0019] The present invention also provides a method for locating coordinates of a gas jet field, comprising: determining the jet axis of an experimental jet field; drawing the jet edge line based on the edge line of the experimental jet field; drawing the jet angle line based on the jet axis and the jet edge line; constructing a polar coordinate system with the jet axis as the polar axis and the jet nozzle of the jet device as the pole; and determining the spatial coordinates of sampling points on the jet axis, the jet edge line, and the jet angle line based on the polar coordinate system.

[0020] The present invention also provides a gas jet field analysis system, comprising: a data acquisition unit for acquiring parameter information of a jet device, which can be configured in a data acquisition instrument 10; a jet activation unit for activating the jet device based on the parameter information to obtain an experimental jet field, which can be configured in the jet device; a jet field drawing unit for drawing jet lines based on the experimental jet field, which can be configured in a high-speed camera 12; a coordinate calculation unit for determining the spatial coordinates of sampling points based on the jet lines, which can be configured in a computer 8; and a characteristic analysis unit for sampling the spatial coordinates of the sampling points to analyze the characteristics of the experimental jet field, which can be configured in the computer 8.

[0021] This invention provides a gas jet field analysis method, coordinate positioning method, and analysis system. The gas jet field analysis method includes: acquiring parameter information of a jet device; activating the jet device based on the parameter information to obtain an experimental jet field; drawing jet lines based on the experimental jet field; determining the spatial coordinates of a sampling point based on the jet lines; and sampling the spatial coordinates of the sampling point to analyze the characteristics of the experimental jet field. This invention achieves precise positioning by drawing jet lines to determine the spatial coordinates of the sampling point, with high reliability. It eliminates the need for manual intervention, thus reducing experimental costs and improving safety. Attached Figure Description

[0022] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments and descriptions of this application are used to explain this application and do not constitute an undue limitation of this application. Wherein:

[0023] Figure 1 This is a flowchart of a gas jet field analysis method according to an embodiment of this application;

[0024] Figure 2 This is a flowchart of a gas jet field coordinate positioning method according to an embodiment of this application;

[0025] Figure 3 This is a diagram of the gas jet field schlieren test platform according to an embodiment of this application;

[0026] Figure 4 This application provides a schlieren effect diagram of the jet flow field under pressure in the embodiments of this application;

[0027] Figure 5 This application provides a schlieren effect diagram for positioning the angle lines of the jet flow field under pressure in an embodiment of the present application.

[0028] Figure 6 The schlieren effect diagram of the jet flow field measurement point location under pressure is set for the embodiments of this application;

[0029] Figure 7 This application provides a schlieren image of the spatial positioning and sampling of the jet flow field under pressure in an embodiment of the present application.

[0030] Figure 8 These are location measurement diagrams for different sampling points in embodiments of this application;

[0031] Figure 9(a) shows the helium gas integral at sampling point r1 in the application embodiment;

[0032] Figure 9(b) shows the helium gas integral at sampling point r2 in the application embodiment;

[0033] Figure 9(c) shows the helium gas integral at sampling point r3 in the application embodiment;

[0034] Figure 10This is a schematic diagram of the spatial sampling point coordinate positioning technology for gas jet field based on schlieren technology. Detailed Implementation

[0035] The present application will now be described in detail with reference to the accompanying drawings and embodiments. Various examples are provided by way of explanation and not by way of limitation. In fact, those skilled in the art will recognize that modifications and variations can be made to the present application without departing from the scope or spirit thereof. For example, a feature shown or described as part of one embodiment may be used in another embodiment to produce yet another embodiment. Therefore, it is desirable that the present application encompass such modifications and variations that fall within the scope of the appended claims and their equivalents.

[0036] In the description of this application, the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," and "bottom," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and do not require that this application be constructed and operated in a specific orientation, and therefore should not be construed as limiting this application. The terms "connected," "linked," and "set up" used in this application should be interpreted broadly. For example, they can refer to a fixed connection or a detachable connection; they can refer to a direct connection or an indirect connection through intermediate components. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances. Example 1

[0037] Figure 1 This is a flowchart illustrating a gas jet field analysis method according to an embodiment of this application. Figure 1 As shown: A gas jet field analysis method, comprising:

[0038] Obtain parameter information of the jet device;

[0039] Based on the parameter information, the jet device is turned on to obtain the experimental jet field; the jet lines are then drawn based on the experimental jet field.

[0040] The spatial coordinates of the sampling point are determined based on the jet line; the spatial coordinates of the sampling point are sampled to analyze the experimental jet field characteristics.

[0041] In this embodiment, by acquiring the parameter information of the jet device and activating it based on this information, the accuracy and repeatability of the experimental jet field can be ensured. Secondly, the process of drawing jet lines based on the experimental jet field can intuitively demonstrate the flow pattern and characteristics of the gas jet field. Through the depiction of jet lines, the trajectory, velocity, and direction of the gas flow can be clearly observed. Furthermore, determining the spatial coordinates of the sampling points based on the jet lines achieves precise positioning. This method avoids the errors and uncertainties that may arise from traditional manual sampling, ensuring the accuracy and representativeness of the sampling points. Precise positioning not only improves the accuracy of experimental results but also helps to detect subtle changes and anomalies in the jet field. Finally, by sampling the spatial coordinates of the sampling points, the characteristics of the experimental jet field can be comprehensively analyzed. This method can systematically collect data from the jet field, thereby revealing key information such as the flow patterns, pressure distribution, and velocity distribution of the jet field. This information has important guiding significance for understanding the physical mechanisms of gas jet fields, optimizing the design of jet devices, and improving jet efficiency.

[0042] Optionally, the jet device has a jet outlet to eject helium gas and form an experimental jet field; the acquisition of parameter information of the jet device includes: acquiring the pressure parameter of the jet outlet, the diameter radius of the jet outlet, and the mass parameter of the helium gas.

[0043] By plotting jet lines to determine the spatial coordinates of sampling points, this method achieves precise positioning and improves the overall quality of the experiment. Furthermore, the use of automated analysis methods based on parameter information reduces human intervention, thus minimizing errors caused by human factors. Additionally, the elimination of human intervention lowers experimental costs.

[0044] Optionally, the step of activating the jet device to obtain an experimental jet field based on the parameter information includes: activating the jet device to obtain a test jet field based on the parameter information; and adjusting the parameter information based on the test jet field to obtain the experimental jet field.

[0045] By activating the jet device based on parameter information to obtain the experimental jet field, and then adjusting the parameter information according to the test jet field, a more accurate experimental jet field can be obtained. This can help optimize experimental design, improve experimental efficiency, and reduce trial-and-error costs.

[0046] Optionally, the jet device includes: a helium storage tank 1, a helium pipeline 2, a jet channel 3, and a nozzle 4. The helium storage tank 1 is connected to the jet channel 3 via the helium pipeline 2, and the nozzle 4 is disposed on the jet channel 3. The step of activating the jet device to obtain an experimental jet field based on the parameter information includes: opening the valve 5 of the helium storage tank 1 based on the parameter information to transport helium through the helium pipeline 2 into the jet channel 3; and ejecting the helium through the nozzle 4 to obtain the experimental jet field.

[0047] By adjusting parameters and controlling the flow of helium, the jet field can be precisely adjusted and controlled, ensuring the accuracy and repeatability of the experiment. Furthermore, the design of the jet device allows for stable delivery and ejection of helium, helping to maintain the stability of the experimental jet field and improve the reliability of the experimental results. In addition, by adjusting the helium flow rate and ejection velocity, the characteristics of the experimental jet field can be flexibly controlled to meet different experimental requirements.

[0048] Optionally, it also includes: a pressure sensor 6 is provided in the jet channel 3; the pressure information of the helium gas is monitored based on the pressure sensor 6, and the pressure information is transmitted to the data acquisition device to monitor the pressure parameters of the helium gas.

[0049] By monitoring the helium pressure in real time using pressure sensor 6, pressure changes during helium flow can be detected and adjusted promptly, ensuring the stability and accuracy of the experimental jet field. Furthermore, transmitting the pressure information to the data acquisition device allows for the recording and analysis of helium pressure parameters, supporting subsequent data processing and analysis. Additionally, based on the monitored pressure information, the helium flow can be finely adjusted, further improving the control precision of the jet field and the experimental results. Moreover, timely monitoring of helium pressure parameters helps avoid safety hazards caused by excessively high or low pressures, ensuring the safety of experimental personnel and equipment.

[0050] Optionally, it also includes: a mass flow meter 7 is installed on the helium pipeline 2; the mass flow meter 7 monitors the mass information of the helium delivered into the jet channel 3, and transmits the mass information to a data acquisition device to monitor the mass parameters of the helium.

[0051] Monitoring the mass of helium using mass flow meter 7 allows for real-time monitoring of its flow, ensuring quality control and stability of the experimental jet field. Furthermore, transmitting this mass information to the data acquisition device facilitates the recording and analysis of helium mass parameters, supporting the accuracy and reliability of experimental results. Additionally, based on the monitored mass information, the helium flow rate can be finely adjusted, further improving the quality control of the jet field and the experimental effect. Moreover, monitoring helium mass parameters helps ensure the stability and accuracy of the experimental jet field, improving the reliability and repeatability of experimental data.

[0052] Optionally, the jet line includes: a jet axis, a jet edge, and a jet angle line; drawing the jet line based on the experimental jet field includes: determining the jet axis of the experimental jet field; drawing the jet edge based on the edge of the experimental jet field; and drawing the jet angle line based on the jet axis and the jet edge.

[0053] By plotting jet lines, including the axis, edge lines, and angle lines, the structure and characteristics of the experimental jet field can be clearly displayed. Furthermore, determining the jet axis and plotting the jet edge lines allows for accurate positioning of the jet's centerline and boundaries, providing a precise reference benchmark for subsequent experimental operations and data analysis. In addition, plotting the jet angle lines helps control the jet's ejection direction and angle, ensuring that the set angles and directions of the experimental jet field meet requirements. Moreover, the plotting of jet lines provides an intuitive visualization tool, helping researchers more intuitively observe and evaluate the characteristics and performance of the experimental jet field.

[0054] Optionally, drawing the jet lines based on the experimental jet field includes: capturing the experimental jet field using a high-speed camera 12 to obtain an image of the experimental jet field; and drawing the jet lines based on the experimental jet field image.

[0055] By using a high-speed camera 12 to capture images of the experimental jet field, the motion and changes of the jet field can be observed in real time, capturing its dynamic characteristics and providing a more accurate data foundation for drawing jet lines. Furthermore, drawing jet lines based on experimental jet field images can more accurately reflect the morphology and characteristics of the actual jet field, improving the accuracy and reliability of the drawing. In addition, drawing jet lines using experimental jet field images can support subsequent data analysis, helping researchers to gain a deeper understanding of the motion patterns and characteristics of the jet field. Finally, drawing jet lines based on experimental jet field images can verify the consistency between experimental results and theoretical models, further improving the reliability and repeatability of the experiment.

[0056] Optionally, drawing the jet angle line based on the jet axis and the jet edge includes: obtaining a jet angle region based on the jet axis and the jet edge, wherein the angle of the jet angle region is α, and 0°≤α≤180°; dividing the angle of the jet angle region into n equal parts based on the set test accuracy requirements to obtain the equal division angle α / n, wherein n≥1 and n is an integer; and drawing the jet angle line based on the equal division angle α / n. By equally dividing the jet angle region, the precision and accuracy of drawing jet angle lines can be improved, ensuring that the angle lines meet the set requirements and precision standards. Furthermore, the number of equal divisions of the jet angle region can be flexibly adjusted according to the set value of n, meeting the angle line drawing needs under different testing precision requirements, thus enhancing the applicability and flexibility of the method. In addition, drawing jet angle lines can visually display the distribution of the jet angle region, helping researchers to more clearly observe and analyze the angular characteristics of the jet field, providing visualization support for subsequent data processing and analysis. Finally, the jet angle lines drawn based on the equally divided angle α / n can be compared with actual measurement data to verify the accuracy and reliability of the experimental results, improving the scientific rigor and credibility of the experiment.

[0057] Optionally, determining the spatial coordinates of the sampling point based on the jet line includes: constructing a polar coordinate system with the jet axis as the polar axis and the jet nozzle of the jet device as the pole; and determining the spatial coordinates of the sampling point on the jet axis, the jet edge line, and the jet angle line based on the polar coordinate system.

[0058] By establishing a polar coordinate system, the spatial location of sampling points in the jet field can be described more intuitively, facilitating the determination and calibration of sampling points at different locations and improving the accuracy and reliability of coordinate determination. Furthermore, determining the spatial coordinates of sampling points along the jet axis, jet edge, and jet angle lines ensures the consistency and continuity of the spatial distribution of sampling points, which is beneficial for comprehensive observation and analysis of the jet field characteristics. In addition, using a polar coordinate system to determine the spatial coordinates of sampling points facilitates coordinate transformation and calculation, simplifying the complexity of data processing and analysis and improving work efficiency and accuracy. Finally, determining the spatial coordinates of sampling points helps optimize experimental design, rationally select the location and number of sampling points, ensure the comprehensiveness and representativeness of experimental data, and improve the scientific validity and credibility of experimental results.

[0059] Optionally, based on the polar coordinate system, determining the spatial coordinates of the sampling points on the jet axis, the jet edge, and the jet angle line includes: sequentially using lengths from r to nr as radii, drawing arcs with the pole O to obtain the axis point Z intersecting the central axis, the edge point Q intersecting the jet edge, and the field intersection point M intersecting the jet angle line; using the axis point Z, the edge point Q, and the field intersection point M as the sampling points, and determining the spatial coordinates.

[0060] By determining the axis point Z, edge point Q, and field intersection point M in the polar coordinate system with the length nr as the radius, the sampling point positions on the jet axis, jet edge, and jet angle line can be accurately determined, improving the accuracy and reliability of the sampling points. Furthermore, by separately determining the sampling points intersecting the central axis, jet edge, and jet angle line, comprehensive coverage of different locations in the jet field can be achieved, facilitating comprehensive observation and analysis of the jet field characteristics and improving the completeness and representativeness of the data. In addition, using the axis point Z, edge point Q, and field intersection point M as sampling points simplifies the sampling process, reduces manual intervention and errors, and improves sampling efficiency and consistency. Finally, by determining the spatial coordinates of the sampling points, the data at the sampling points can be directly analyzed and processed, facilitating researchers' in-depth understanding of the characteristics and laws of the jet field and providing support for subsequent research.

[0061] Optionally, the step of using the axis point Z, the edge point Q, and the field intersection point M as the sampling points and determining the spatial coordinates includes: using the axis point Z as the first sampling point, and taking the length r to nr as the polar radius, obtaining the polar coordinates of the axis point as PZr to Pnr respectively; PZr to PZnr = (r to nr, 0); using the edge point Q as the second sampling point, and taking α as the polar angle of the jet edge line, and based on the length r to nr, obtaining the polar coordinates of the edge point as PQr to PQnr = (r to nr, α); using the field intersection point M as the third sampling point, and taking α / n to α as the polar angle of the jet angle line, and based on the length r to nr, obtaining the polar coordinates of the field intersection point as Pmr to Pmnr = (r to nr, α / n to α); based on PZr to PZnr, PQr to PQnr, P... mr~Pmnr, respectively determine the spatial coordinates of the first sampling point, the second sampling point and the third sampling point.

[0062] The method of determining sampling points using polar coordinates can accurately pinpoint the spatial location of each sampling point, which is beneficial for subsequent data analysis and understanding of the jet field. Furthermore, by using the angle and radius parameters of the polar coordinates, the position of the sampling points in the jet field can be flexibly controlled to adapt to research needs at different scales and angles. In addition, polar coordinate transformation can easily convert the polar coordinates of the sampling points to rectangular coordinates, facilitating data processing and visualization analysis. Moreover, this method simplifies the sampling point determination process, reduces manual intervention and errors, and improves experimental efficiency and repeatability.

[0063] Optionally, determining the spatial coordinates of the first sampling point, the second sampling point, and the third sampling point based on PZr~PZnr, PQr~PQnr, and Pmr~Pmnr respectively includes: performing trigonometric function transformations on PZr~PZnr, PQr~PQnr, and Pmr~Pmnr to determine the spatial coordinates of the first sampling point, the second sampling point, and the third sampling point.

[0064] Trigonometric transformations can directly convert polar coordinates to rectangular coordinates, avoiding complex manual calculations and improving computational efficiency and accuracy. Furthermore, direct coordinate transformation reduces human error, ensuring the accuracy and consistency of the spatial coordinates of sampling points. In addition, rectangular coordinates are a commonly used coordinate representation method, and the transformed coordinates are easier to understand and apply in subsequent analysis and experiments.

[0065] Optionally, the step of performing trigonometric function transformations on PZr~PZnr, PQr~PQnr, and Pmr~Pmnr to determine the spatial coordinates of the first sampling point, the second sampling point, and the third sampling point includes: performing trigonometric function transformations based on the following formulas to determine the spatial coordinates of the sampling points; performing trigonometric function transformations on PZr~PZnr according to Formula 1 to determine the spatial coordinates of the first sampling point TZr~TZnr=(nr×cos0°,sin0°) Formula 1; performing trigonometric function transformations on PQr~PQnr according to Formula 2 to determine the spatial coordinates of the second sampling point TQr~TQnr=(nr×cosα,nr×sinα) Formula 2; and performing trigonometric function transformations on Pmr~Pmnr according to Formula 3 to determine the spatial coordinates of the third sampling point T. mr~Tmnr=(nr×cos(α)~nr×cos(α / n), sin×(α)~sin×(α / n)) Formula 3.

[0066] By using precise trigonometric transformation formulas, polar coordinates can be accurately converted to rectangular coordinates, ensuring the accuracy of the spatial coordinates of the sampling points. Secondly, the clarity and certainty of the formulas make it easier to control and adjust the spatial coordinates of the sampling points, which is beneficial to the accuracy and repeatability of the experiment. Finally, using a formulaic method for coordinate transformation helps to standardize the experimental process and reduce the influence of human factors on the experimental results.

[0067] Optionally, the spatial coordinates of the sampling points are sampled to analyze the experimental jet field characteristics, including: analyzing the spatial coordinates of the sampling points to obtain experimental jet field characteristic parameters; plotting the experimental jet field characteristic parameter curves based on the experimental jet field characteristic parameters; and analyzing the experimental jet field characteristics based on the experimental jet field characteristic curves.

[0068] By analyzing the spatial coordinates of the sampling points, the characteristic parameters of the experimental jet field can be obtained, thus providing a deeper understanding of the properties and behavior of the jet. Furthermore, based on these characteristic parameters, graphs can be plotted to visually display the changing trends of the jet field's characteristics at different spatial points, aiding in the discovery of patterns and trends. Additionally, analysis of these characteristic graphs reveals deeper insights into the jet field's properties, such as velocity and pressure distribution, helping researchers better understand jet phenomena and their influencing factors. Moreover, the analysis of the experimental jet field's characteristics can verify the accuracy of theoretical models, further refining fluid mechanics theory and providing important references for research in related fields. Example 2

[0069] Based on the above embodiment one, the present invention also provides a gas jet field coordinate positioning method. Figure 2 Here is a flowchart of a gas jet field coordinate positioning method, such as... Figure 2 As shown, a method for locating coordinates in a gas jet field includes:

[0070] Determine the jet axis of the experimental jet field; draw the jet edge line based on the edge line of the experimental jet field;

[0071] Draw jet angle lines based on the jet axis and the jet edge; construct a polar coordinate system with the jet axis as the polar axis and the jet nozzle of the jet device as the pole;

[0072] Based on the polar coordinate system, the spatial coordinates of the sampling points on the jet axis, the jet edge, and the jet angle line are determined.

[0073] By determining the jet axis, plotting the jet edge and angle lines, and constructing a polar coordinate system, the spatial coordinates of sampling points at various locations within the jet apparatus can be precisely located, ensuring the accuracy and reliability of experimental data. Furthermore, plotting the jet edge and angle lines and constructing the polar coordinate system visually demonstrates the geometry and characteristics of the jet field, aiding researchers in understanding and analyzing its structure and properties. Additionally, determining the spatial coordinates of sampling points in the polar coordinate system clearly describes their positional relationship relative to the jet axis and edge, providing crucial information for subsequent experimental data processing and analysis. Moreover, this method offers an effective coordinate positioning scheme for gas jet field experiments, facilitating experimental planning, determining sampling point locations, and improving experimental controllability and repeatability.

[0074] Example 3

[0075] Based on the above embodiments one and two, the present invention also provides a gas jet field analysis system. Figure 3 This application provides an embodiment of a gas jet field analysis system diagram, as shown below. Figure 3 The gas jet field analysis system includes:

[0076] The data acquisition unit is used to acquire parameter information of the jet device and can be configured in the data acquisition instrument 10.

[0077] A jet activation unit is used to activate the jet device based on the parameter information to obtain an experimental jet field. The jet activation unit can be configured within the jet device. Specifically, the jet device includes: a helium storage tank 1, a helium pipeline 2, a jet channel 3, and a nozzle 4. The helium storage tank 1 is connected to the jet channel 3 via the helium pipeline 2, and the nozzle 4 is disposed on the jet channel 3. Activating the jet device based on the parameter information to obtain the experimental jet field includes: activating the valve 5 of the helium storage tank 1 based on the parameter information to deliver helium through the helium pipeline 2 into the jet channel 3; and ejecting the helium through the nozzle 4 to obtain the experimental jet field.

[0078] A jet field drawing unit is used to draw jet lines based on the experimental jet field. The jet field drawing unit can be configured in a high-speed camera 12, which captures a schlieren image of the experimental jet field and draws the jet lines of the experimental jet field.

[0079] A coordinate calculation unit is used to determine the spatial coordinates of the sampling point based on the jet line. The coordinate calculation unit can be configured in the computer 8.

[0080] A characteristic analysis unit is used to sample the spatial coordinates of the sampling points to analyze the characteristics of the experimental jet field. This characteristic analysis unit can be configured in the computer 8. Specifically, the characteristic analysis unit includes a helium mass spectrometer leak detector 9 and the computer 8. The helium mass spectrometer leak detector 9 acquires sampling point data through concentration monitoring points 13 set in the experimental jet field and transmits the sampling point data to the computer 8 to analyze the characteristics of the experimental jet field.

[0081] Power supply 11 is used to supply power to the data acquisition unit, jet activation unit, jet field drawing unit, coordinate calculation unit and characteristic analysis unit.

[0082] The data acquisition unit obtains parameter information from the jet device, enabling automated data acquisition and improving efficiency and accuracy. The jet activation unit activates the jet device based on the parameter information, allowing for precise control of the jet and ensuring the stability and consistency of the experimental jet field. Furthermore, the jet field plotting unit can plot jet lines in real time, visually displaying the morphology and characteristics of the experimental jet field, providing researchers with an intuitive data visualization and analysis tool. In addition, the coordinate calculation unit determines the spatial coordinates of the sampling points based on the jet lines, achieving accurate calculation of the sampling point locations and providing an accurate data foundation for subsequent characteristic analysis. Finally, the characteristic analysis unit analyzes the spatial coordinates of the sampling points, helping researchers gain a deeper understanding of the characteristics of the experimental jet field and providing crucial support for theoretical verification and engineering applications.

[0083] Specifically, the operation is as follows:

[0084] (1) Setting up the tattoo testing platform

[0085] Figure 3 This is a diagram of the gas jet field schlieren testing platform according to an embodiment of this application. Figure 3 The test platform diagram shown illustrates the equipment layout.

[0086] (2) Set the jet device parameters and turn on nozzle 4.

[0087] Different jet device parameters are set according to the specific project or research accuracy requirements. After setting, the jet device is turned on to check and debug the jet field status. Valve 5 of the helium storage tank 1 is opened to deliver helium through the helium pipeline 2 into the jet channel 3. The helium is then ejected through the nozzle 4 to obtain the jet field. A pressure sensor 6 is installed in the jet channel 3 to monitor the pressure parameters of the helium and transmit these parameters to the data acquisition instrument 10. A mass flow meter 7 is installed on the helium pipeline 2 to monitor the mass parameters of the helium and transmit these parameters to the data acquisition instrument 10. The data acquisition instrument 10 summarizes the received parameter information and transmits it to the computer 8.

[0088] (3) Draw the jet axis and edge lines

[0089] After the jet field in the second step stabilizes, draw the jet axis and jet edge to obtain the jet angle region, and record the size of the jet field angle.

[0090] (4) Draw the jet angle line according to the test accuracy.

[0091] Based on the jet angle region obtained in step three, and considering the required testing accuracy, the jet field test angle lines are plotted. For example, assuming the total jet field angle is 60°, if the accuracy requirement is not high and only a relatively rough understanding of the overall distribution is needed, then for a single-sided total angle of 30°, a test angle line can be selected every 15°; if the testing accuracy is high, a test angle line can be selected every 10° or 5°. Specific settings should be made based on the actual situation and needs. Figure 5 Under the test conditions of this experiment, the total angle of the jet field is 30°. Due to the symmetry of the jet field, only one side needs to be tested in actual testing. However, from the perspective of spatial coordinates, the axis is 0°, and the angle gradually increases axially symmetrically towards both sides. In this case, the edge angles on both sides are set to 15° based on the experimental results, and a 7° ray test line is set in the middle.

[0092] (5) Set the length of all sampling points

[0093] Based on testing accuracy, all sampling point lengths are set along the jet axis, angle line, and edge line. Similarly, if the testing accuracy requirement is not very high, a measurement point can be selected every 10cm or 20cm; if the testing accuracy requirement is high, a test point can be selected every 5cm or less. Of course, it is not recommended for the test points to be too close, especially under high pressure conditions, as the numerical changes are not significant due to the close distance, and have little practical meaning.

[0094] (6) Determine the spatial coordinates of the sampling points

[0095] Using a sampling interval of 5cm, sampling points are plotted along a 10° test ray. This results in a series of spatial sampling coordinates along the test jet line: (5cm, 10°), (10cm, 10°), (15cm, 10°), (20cm, 10°), (25cm, 10°), (30cm, 10°), (35cm, 10°), (40cm, 10°), (45cm, 10°), (50cm, 10°), and so on. Similarly, the regional spatial coordinates along each jet line at 0°, 10°, 20°, and 30° can be obtained. These sampling point coordinates can be represented as subdivided jet line positioning markers.

[0096] Based on the pre-defined positioning coordinates, the spatial coordinates of all sampling points are further refined to facilitate subsequent measurements and data analysis. Specifically: Figure 10 This is a schematic diagram of the spatial sampling point coordinate positioning technology for gas jet fields based on schlieren technology, as shown below. Figure 10 As shown, a spatial coordinate formula for the gas jet field concentration test points can be established with the nozzle 4 outlet as the coordinate origin. Based on the test accuracy and data volume requirements, the test radius and radius density are determined, resulting in n radii: r1, r2, r3...rn. Then, based on these n radii rn, a mathematical description of the spatial coordinates of all proposed sampling test points is performed:

[0097] Sampling point (r) i The X coordinate of (α°):

[0098] X-axis jet axis sampling point x-coordinate = r k(i＝1、2、....) ;

[0099] X-axis jet edge sampling point x-coordinate = r k(i＝1、2、3....) ×cosα;

[0100]

[0101] Sampling point (r) i The Y-coordinate of (α°):

[0102] The x-coordinate of the sampling point on the Y-axis jet axis is 0;

[0103] Y-axis jet edge sampling point x-coordinate r k(i＝1、2、3....) ×sinα;

[0104]

[0105] In the formula, r---test radius; k---radius of the measuring point on the axis; α---angle between the axis and the side line; n---number of equal angle divisions on one side, the value of which is determined by the experimental testing requirements; j---sequence number of the angle measuring line, ranging from 1 to n-1.

[0106] (7) Conduct jet testing

[0107] Based on the pre-set parameter information, after the jet field stabilizes, the jet field characteristic parameters are sampled one by one at all the coordinate sampling points determined in step six, using the helium mass spectrometer leak detector 9.

[0108] (8) Jet Field Characteristics Analysis

[0109] Based on computer 8, the coordinate sampling points of the jet field characteristic parameters are analyzed to obtain the jet field characteristics.

[0110] Example 4

[0111] Based on the above embodiments one, two, and three, this application also provides another embodiment.

[0112] Figure 4 To obtain the schlieren image of the jet flow field under set pressure, the parameters of the jet device were acquired, the jet device was turned on to obtain the jet field, and after the jet field stabilized, the schlieren image of the jet field was captured using a high-speed camera 12. Figure 4 The data is then transmitted to computer 8. Computer 8 is based on the gas jet field coordinate positioning method described in Embodiment 2, such as... Figure 4 The image shows the gas jet flow field test results obtained under experimental conditions after setting certain parameters. As can be seen from the image, schlieren technology can effectively display the approximate outline and distribution range of the jet field, and the general density-sparse pattern can be observed. Further testing using specialized equipment is needed to determine the specific flow field characteristics.

[0113] Figure 5 To illustrate the positioning schlieren effect of the jet flow field angle line under pressure in the embodiments of this application, as shown in the figure. Figure 5 As shown, in this embodiment, the jet field angle is a total of 30°. Due to the symmetry of the jet field, only one side needs to be tested in actual testing. However, from the perspective of spatial coordinates, the axis is 0°, and the angle gradually increases axially symmetrically towards both sides. In this case, the edge angles on both sides are set to 15° based on the experimental results, and a 7° ray test line is set in the middle.

[0114] Figure 6 To illustrate the schlieren effect of measuring point location in the jet flow field under pressure in the embodiments of this application, as shown in the figure... Figure 6 As shown, a total of 15 measuring points are set in this embodiment, with 5 measuring points on each test line. During actual data acquisition, the number of measuring points can be dynamically adjusted based on the test data. For example, near nozzle 4 on the left, due to the dense jet field and similar characteristics such as concentration and velocity, the measured concentration fields are also relatively similar, so fewer points can be taken. The specific number of measuring points depends on the actual situation.

[0115] Figure 7 This application provides a spatial positioning sampling schlieren image of the jet flow field under pressure for embodiments of this application; such as... Figure 7 As shown, this diagram illustrates the effect of sampling flow field characteristics using a jet field sampling device (sampling is performed at the second sampling point along the axis). During sampling, all measuring points need to be sampled and tested individually; the specific number of testing points depends on the available time. The sampling tube must be fixed in advance and kept vertical to minimize disturbance to the flow field and reduce testing errors.

[0116] Figure 8 This is a measurement map showing the location of different sampling points in the embodiments of this application, such as... Figure 8 As shown, determine the coordinates of different sampling points r1, r2, and r3.

[0117] Figure 9(a) shows the helium gas integral at sampling point r1 in the application embodiment; Figure 9(c) shows the helium gas integral at sampling point r2 in the application embodiment; Figure 9(c) shows the helium gas integral at sampling point r3 in the application embodiment. Figure 9(a) , 9(b) As shown in Figure 9(c), the helium gas integral numbers of r1, r2, and r3 are obtained by analyzing different sampling points of r1, r2, and r3 using computer (8). In the helium gas integral number graph, the horizontal axis represents the sampling time, and the vertical axis represents the helium volume fraction. The curves in the graph, from top to bottom, represent sampling points at distances of 4, 10 cm, 30 cm, and 50 cm from the jet nozzle, respectively. The jet field characteristics are obtained based on the helium gas integral number graph.

[0118] This invention provides a gas jet field analysis method, coordinate positioning method, and analysis system. The gas jet field analysis method includes: acquiring parameter information of a jet device; activating the jet device based on the parameter information to obtain an experimental jet field; drawing jet lines based on the experimental jet field; determining the spatial coordinates of a sampling point based on the jet lines; and sampling the spatial coordinates of the sampling point to analyze the characteristics of the experimental jet field. This invention achieves precise positioning by drawing jet lines to determine the spatial coordinates of the sampling point, with high reliability. It eliminates the need for manual intervention, thus reducing experimental costs and improving safety.

[0119] It should be noted that the term "comprising" in the specification, claims, and accompanying drawings of this application is intended to cover a non-exclusive inclusion. In this application, terms such as "upper," "lower," "vertical," and "horizontal" indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. These terms are primarily used to better describe this application and its embodiments and are not intended to limit the indicated components to having a specific orientation. Terms such as "first" and "second" are used for distinction and are not intended to limit the quantity. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0120] The above are merely preferred embodiments of this application and are not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A method for analyzing gas jet fields, characterized in that, include: Obtain parameter information of the jet device; Based on the parameter information, the jet device is turned on to obtain the experimental jet field; Draw jet lines based on the experimental jet field; The spatial coordinates of the sampling point are determined based on the jet lines; The spatial coordinates of the sampling points are sampled to analyze the experimental jet field characteristics.

2. The gas jet field analysis method according to claim 1, characterized in that, The jet device has a jet outlet to eject helium gas and form an experimental jet field; the acquisition of parameter information of the jet device includes: Obtain the pressure parameters of the jet outlet, the diameter of the jet outlet, and the mass parameters of the helium gas.

3. The gas jet field analysis method according to claim 1, characterized in that, The step of activating the jet device based on the parameter information to obtain the experimental jet field includes: Based on the parameter information, the jet device is activated to obtain the test jet field; Based on the test jet field, the parameter information is adjusted to obtain the experimental jet field.

4. The gas jet field analysis method according to claim 3, characterized in that, The jet device includes: a helium storage tank (1), a helium pipeline (2), a jet channel (3), and a nozzle (4). The helium storage tank (1) is connected to the jet channel (3) through the helium pipeline (2), and the nozzle (4) is disposed on the jet channel (3). The step of activating the jet device based on the parameter information to obtain the experimental jet field includes: Based on the parameter information, the valve (5) of the helium storage tank (1) is opened to transport helium through the helium pipeline (2) into the jet channel (3); Based on the nozzle (4), the helium gas is ejected to obtain the experimental jet field.

5. The gas jet field analysis method according to claim 1, characterized in that, The jet line includes: jet axis, jet edge, and jet angle line; the drawing of the jet line based on the experimental jet field includes: Determine the jet axis of the experimental jet field; The jet edge line is drawn based on the edge line of the experimental jet field; The jet angle line is drawn based on the jet axis and the jet edge.

6. The gas jet field analysis method according to claim 1, characterized in that, The process of drawing jet lines based on the experimental jet field includes: The experimental jet field was captured by a high-speed camera (12) to obtain an image of the experimental jet field; The jet lines were plotted based on the experimental jet field image.

7. The gas jet field analysis method according to claim 7, characterized in that, The step of drawing the jet angle line based on the jet axis and the jet edge includes: The jet angle region is obtained based on the jet axis and the jet edge, where the angle α of the jet angle region is 0°≤α≤180°; Based on the set test accuracy requirements, the angle of the jet angle region is divided into n equal parts to obtain the equal division angle α / n, where n≥1 and n is an integer; The jet angle line is drawn based on the equally divided angle α / n.

8. The gas jet field analysis method according to claim 1, characterized in that, The spatial coordinates of the sampling points are sampled to analyze the experimental jet field characteristics, including: The spatial coordinates of the sampling points are analyzed to obtain the experimental jet field characteristic parameters; Based on the experimental jet field characteristic parameters, plot the experimental jet field characteristic parameter curves; Based on the experimental jet field characteristic curve, the characteristics of the experimental jet field are analyzed.

9. A method for locating coordinates in a gas jet field, characterized in that, include: Determine the jet axis of the experimental jet field; The jet edge line is drawn based on the edge line of the experimental jet field; Draw the jet angle line based on the jet axis and the jet edge; A polar coordinate system is constructed with the jet axis as the polar axis and the jet nozzle of the jet device as the pole. Based on the polar coordinate system, the spatial coordinates of the sampling points on the jet axis, the jet edge, and the jet angle line are determined.

10. A gas jet field analysis system, characterized in that, include: The data acquisition unit is used to acquire parameter information of the jet device and can be configured in the data acquisition instrument (10). A jet activation unit is used to activate the jet device based on the parameter information to obtain an experimental jet field. The jet activation unit can be configured in the jet device. A jet field drawing unit is used to draw jet lines based on the experimental jet field. The jet field drawing unit can be configured in a high-speed camera (12). The coordinate calculation unit is used to determine the spatial coordinates of the sampling point based on the jet line. The coordinate calculation unit can be configured in the computer (8). The characteristic analysis unit is used to sample the spatial coordinates of the sampling points in order to analyze the characteristics of the experimental jet field. The characteristic analysis unit can be configured in the computer (8).

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