A numerical simulation calibration method for shower nozzles and nozzle network matrix

Abstract

The present invention relates to the field of automobile testing technology, specifically to a numerical simulation calibration method for a shower nozzle and a nozzle pipe network matrix, including: performing calibration of a pipe network matrix water spraying in a windless state: collecting the water spraying parameters of each nozzle of the pipe network matrix under test, simulating the spraying state of a single nozzle, and correcting the water spraying parameters so that the simulated and tested water spraying parameters are consistent; loading the nozzle parameters of each nozzle onto each nozzle of the simulated pipe network matrix; performing calibration of a pipe network matrix water spraying in a wind-loaded state, including: executing the above-mentioned same calibration when the pipe network matrix is ​​in a state with a flow field boundary environment; judging whether the rain environment constructed by the simulated pipe network matrix nozzle is consistent with the rain environment of the test, and if so, completing the numerical simulation calibration of the shower nozzle and the nozzle pipe network matrix. This scheme can ensure the consistency of simulation and test, improve the reliability of simulation, shorten the vehicle development cycle, ensure simulation accuracy, and reduce development costs.

Description

Technical Field

[0001] The invention relates to the technical field of automobile testing, and in particular to a numerical simulation calibration method for a shower nozzle and a nozzle pipe network matrix. Background Art

[0002] The water management performance of the whole vehicle reflects the adaptability of the vehicle in high-humidity environments such as rain, car washing, wading, rain and fog, and waterproofing. It is a performance development model for the unified development and management of the water properties of the whole vehicle in the forward development of the whole vehicle performance. In recent years, the development of water management performance has been heating up, and the investment has been increasing. Test verification is required in the process of vehicle water management development to ensure the water management performance of the whole vehicle. In the whole vehicle water management performance, the vehicle rain, car washing, driving in rainy days and other working conditions are all simulated vehicle rainy day working conditions. At present, the rain environment we create in the laboratory is to use sprinklers to spray water; different flow field boundaries with different rain field boundaries can simulate different automobile water management working conditions. For example, the vehicle driving condition in rainy days is to blow rainwater to the surface of the vehicle body through a wind tunnel in the environmental test room to simulate the vehicle driving condition in rainy days; the vehicle rain condition is to arrange a sprinkler spray matrix around the vehicle in the rain room to simulate the rainy parking condition or vehicle washing condition. Therefore, by combining the laboratory water supply system, spatial rainwater distribution, and nozzle pipe network layout, different rainwater environments can be designed to simulate vehicle water management tests.

[0003] In order to ensure the consistency of simulation and test results during the development of vehicle water management, the same nozzle network matrix is ​​usually built as the rain field boundary condition for water management simulation development in the early stage of simulation development. The spray state and spray parameters of the nozzle are key indicators affecting the simulation results, and are also important factors to ensure the consistency of simulation and test results. However, there are differences between the relevant standard parameters of the nozzle and the actual scene. Therefore, it is necessary to calibrate or verify the nozzle spray parameters of the network matrix separately (including spray form, spray volume, spray angle, spray speed, spray particle size and distribution).

[0004] The rain field boundary currently used is usually the uniform boundary provided by the software, such as Figure 1 As shown; some engineers use the sprinkler network matrix to input the rain field boundary, such as Figure 2 As shown in the figure, the nozzle parameters directly use the parameters provided by the manufacturer, which leads to a large gap between the simulation results and the actual test, and the consistency between the simulation and the test cannot be guaranteed, which affects the reliability of the simulation scheme.

[0005] Therefore, there is an urgent need for a numerical simulation calibration method for shower nozzles and nozzle network matrices, which can ensure the consistency of simulation and experiment, improve the reliability of simulation, shorten the vehicle development cycle, ensure simulation accuracy, and reduce development costs. Summary of the invention

[0006] The present invention aims to provide a numerical simulation calibration method for a shower nozzle and a nozzle pipe network matrix, which can ensure the consistency of simulation and experiment, improve the reliability of simulation, shorten the vehicle development cycle, ensure simulation accuracy, and reduce development costs.

[0007] The present invention provides the following basic scheme: a numerical simulation calibration method for a shower nozzle and a nozzle pipe network matrix, comprising:

[0008] S1. Calibrate the water spraying in the pipe network matrix in the windless state, including:

[0009] S101, collecting water spray parameters of each sprinkler of the pipe network matrix under test;

[0010] S102, simulating the spraying state of a single sprinkler head, and correcting the spraying parameters, so that the spraying parameters of the simulated single sprinkler head and the tested sprinkler head are consistent, and completing the calibration of the single sprinkler head in the no-wind load state;

[0011] S103, loading the nozzle parameters of each nozzle onto each nozzle of the simulated pipe network matrix, and completing the calibration of the nozzle of the pipe network matrix in a no-wind load state;

[0012] S2, calibrating the water spraying state of the pipe network matrix with wind load, including: executing S101-S103 in the state of the pipe network matrix with flow field boundary environment to complete the calibration of the water spraying state of the pipe network matrix with wind load;

[0013] S3. Determine whether the rain environment constructed by the simulated pipe network matrix nozzle is consistent with the test rain environment. If so, complete the numerical simulation calibration of the shower nozzle and the nozzle pipe network matrix.

[0014] Furthermore, the water spraying parameters include: water spraying amount, water spraying angle, water spraying speed, water spraying particle size and distribution.

[0015] Further, the S101 includes:

[0016] Use rainwater collection equipment to collect and count the water spray volume of a single sprinkler, correct the water spray volume, and obtain the actual water spray volume of each sprinkler;

[0017] A raindrop meter is used to measure the spray angle of the sprinkler. Combined with the spray pattern, the spray velocity and spray angle of the sprinkler are obtained according to the rainwater spray principle model.

[0018] Furthermore, the rainwater collection device is used to collect and count the water spray volume of a single sprinkler head, and the water spray volume is corrected to obtain the actual water spray volume of each sprinkler head, including:

[0019] q0=q1+q2+…+q n ;

[0020]

[0021] Q n =γ n Q0;

[0022] Where q0 is the measured water volume in the pipeline, q n To measure the water spray volume of each nozzle, γ n Q is the water spray correction coefficient of each nozzle, n is the actual water spray volume of each sprinkler, and Q0 is the actual water supply volume fed back by the water supply system.

[0023] Furthermore, the use of a raindrop meter to measure the spray angle of the sprinkler head, combined with the spray form, according to the rainwater spray principle model, to obtain the spray speed and spray angle of the sprinkler head, includes:

[0024] v x =vcosa;

[0025] v y =vsina;

[0026] s1=v x t1;

[0027] s2=v x t2;

[0028]

[0029]

[0030] where v x 、v y is the initial velocity component of the nozzle's spray velocity in the horizontal and vertical directions, a is the angle between the nozzle's spray direction and the horizontal direction, t is the time interval from the nozzle spraying water to the ground, h is the height from the nozzle's spraying point to the ground, and s is the horizontal distance from the nozzle's spraying point to the landing point.

[0031] Furthermore, the pipe network matrix executes S101-S103 in a state with a flow field boundary environment to complete the calibration of the pipe network matrix water spraying state with wind load, including:

[0032] Calibrate the flow field of the empty wind tunnel to make the simulated flow field consistent with the test flow field;

[0033] The flow field calibration result output is used as the flow field boundary input for rain field calibration;

[0034] Under the state with flow field boundary environment, execute S101-S103 to complete the calibration of the wind load state of the pipe network matrix water spray.

[0035] Further, the S3 includes:

[0036] The same interface is selected in the rain environment constructed by the simulated pipe network matrix sprinkler and the test rain environment, and the rain intensity at the interface is measured respectively;

[0037] Determine whether the simulated rain intensity is consistent with the test rain intensity. If so, determine that the rain environment constructed by the simulated pipe network matrix sprinkler is consistent with the test rain environment, and complete the numerical simulation calibration of the shower nozzle and the sprinkler pipe network matrix.

[0038] Beneficial effects of this scheme: This scheme calibrates the numerical simulation of the shower nozzle and the nozzle pipe network matrix. First, the pipe network matrix water spraying is calibrated in the windless state, and then the pipe network matrix water spraying is calibrated in the wind-loaded state. The calibration is completed for different environments. After the calibration is completed, it will be judged whether the rain environment constructed by the simulated pipe network matrix sprinkler is consistent with the test rain environment. If so, the numerical simulation calibration of the shower nozzle and the nozzle pipe network matrix is ​​completed to ensure the consistency of the simulation and the test.

[0039] Equivalent to the existing technology, this solution does not directly adopt the nozzle parameters provided by the manufacturer. During the calibration process, the water spray parameters of each nozzle in the test pipe network matrix will be collected first, and then the injection state of the single nozzle will be simulated and the water spray parameters will be corrected to make the water spray parameters of the simulated single nozzle and the test nozzle consistent, thus completing the calibration of the single nozzle in the no-wind load state; the nozzle parameters of each nozzle will be loaded onto each nozzle in the simulated pipe network matrix to complete the calibration of the pipe network matrix nozzle in the no-wind load state; the calibration method is the same under the wind load state, and the entire calibration process improves the reliability of the simulation analysis results, the consistency of the simulation and test results, and the high repeatability of the test, so as to save a lot of manpower, financial resources and time, and shorten the project development cycle.

[0040] This solution realizes the single calibration of different nozzle parameters without considering the water supply capacity of the water supply system and the specific structure of the nozzle, and obtains the detailed spray parameters of the nozzle, and calibrates the nozzle spray parameters under different pipe network static working conditions, such as: rain room or automatic car wash room, so as to build a simulation model of the complete replica scene based on parameters and pipe network layout. At the same time, the water spray state of the pipe network matrix under different wind loads is calibrated, so as to build a simulation model of the complete replica scene based on parameters and pipe network layout.

[0041] In summary, this solution can ensure the consistency of simulation and testing, improve the reliability of simulation, shorten the vehicle development cycle, ensure simulation accuracy, and reduce development costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1 It is a schematic diagram of the boundary of a uniform rain field in the prior art;

[0043] Figure 2 It is a schematic diagram of the boundary of the pipe network rain field in the prior art;

[0044] Figure 3 It is a flow chart of an embodiment of a numerical simulation calibration method for a shower nozzle and a nozzle pipe network matrix of the present invention;

[0045] Figure 4 Schematic diagram of nozzle angle in an embodiment of a numerical simulation calibration method for a shower nozzle and a nozzle pipe network matrix of the present invention Figure 1 ;

[0046] Figure 5 Schematic diagram of nozzle angle in an embodiment of a numerical simulation calibration method for a shower nozzle and a nozzle pipe network matrix of the present invention Figure 2 ;

[0047] Figure 6 It is a schematic diagram of the spray state of the sprinkler and the measurement of sprinkler parameters in an embodiment of a numerical simulation calibration method for a shower sprinkler and a sprinkler pipe network matrix of the present invention;

[0048] Figure 7 A schematic diagram of the water spray particle size, i.e., the distribution state, in an embodiment of a numerical simulation calibration method for a shower nozzle and a nozzle pipe network matrix of the present invention;

[0049] Figure 8 A schematic diagram of a sprinkler simulation in an embodiment of a numerical simulation calibration method for a shower sprinkler and a sprinkler pipe network matrix of the present invention;

[0050] Fig. 9 It is a schematic diagram of a single sprinkler nozzle spraying state in an embodiment of a numerical simulation calibration method for a shower sprinkler nozzle and a sprinkler nozzle pipe network matrix of the present invention;

[0051] Fig.10 It is a schematic diagram of a simulated spray state of a shower nozzle in an embodiment of a numerical simulation calibration method for a shower nozzle and a nozzle pipe network matrix of the present invention;

[0052] Fig.11 Schematic diagram of wind tunnel flow field calibration in an embodiment of a numerical simulation calibration method for a shower nozzle and a nozzle pipe network matrix of the present invention Figure 1 ;

[0053] Fig.12 Schematic diagram of wind tunnel flow field calibration in an embodiment of a numerical simulation calibration method for a shower nozzle and a nozzle pipe network matrix of the present invention Figure 2 ;

[0054] Fig.13 It is a schematic diagram of the calibration of the pipe network matrix sprinkler under wind load state in an embodiment of a numerical simulation calibration method for a shower sprinkler and a sprinkler pipe network matrix of the present invention;

[0055] Fig.14 It is a schematic diagram of the comparison between the test and simulation of rain intensity in an embodiment of a numerical simulation calibration method for a shower nozzle and a nozzle pipe network matrix of the present invention. DETAILED DESCRIPTION

[0056] The following is further described in detail through specific implementation methods:

[0057] The embodiment is basically as shown in the attached Figure 3 As shown: A numerical simulation calibration method for a shower nozzle and a nozzle pipe network matrix, comprising:

[0058] S1. Calibrate the water spraying in the pipe network matrix in the windless state, including:

[0059] S101, collecting water spray parameters of each nozzle in the pipe network matrix of the test; the water spray parameters include: water spray volume, water spray angle, water spray speed, water spray particle size and distribution; the water spray particle size and distribution refers to the diameter range of the sprayed water droplets and the specific gravity corresponding to different particle size ranges;

[0060] Specifically, S101 includes:

[0061] Rainwater collection equipment is used to collect and count the water spray volume of a single nozzle. The same row of nozzles can be collected in the same way to determine the water spray volume of each nozzle, and the water spray volume can be corrected to obtain the actual water spray volume of each nozzle, including:

[0062] q0=q1+q2+…+q n ;

[0063]

[0064] Q n =γ n Q0;

[0065] Where q0 is the measured water volume in the pipeline, q n To measure the water spray volume of each nozzle, γ n Q is the water spray correction coefficient of each nozzle, n is the actual water spray volume of each sprinkler, and Q0 is the actual water supply volume fed back by the water supply system.

[0066] The actual water volume of each nozzle can be measured by the above method. The nozzle's water spray angle, water spray speed and water spray form need to be confirmed later. A raindrop meter is used to measure the nozzle's water spray angle, such as Figure 4 and Figure 5 As shown, combined with the water spraying form, according to the rain water spraying principle model, that is, the rain water spraying principle formula, the spraying speed and spraying angle of the sprinkler are obtained, as shown in Figure 6 As shown, including:

[0067] vx =vcosa;

[0068] v y =vsina;

[0069] s1=v x t1;

[0070] s2=v x t2;

[0071]

[0072]

[0073] where v x 、v y is the initial velocity component of the nozzle's spray velocity in the horizontal and vertical directions, a is the angle between the nozzle's spray direction and the horizontal direction, t is the time interval from the nozzle spraying water to the ground, h is the height from the nozzle's spraying point to the ground, and s is the horizontal distance from the nozzle's spraying point to the landing point.

[0074] The water particle size and distribution are also collected using a raindrop meter. When the raindrop meter is working, the laser transmitting end emits a laser beam with a length of 180mm, a width of 30mm, and a height of 1mm, which is received by the receiving end and converted into an electrical signal. When there are no precipitation particles passing through, a stable voltage will be formed at the receiving end. When precipitation particles pass through the laser east area, the voltage at the receiving end becomes smaller due to the shielding effect. The amplitude of the voltage reduction is related to the diameter of the raindrops, and the duration of the voltage reduction is related to the falling speed of the raindrops. In this embodiment, the raindrop meter uses an OTT-Parsivel laser raindrop spectrometer, which has 32 diameter detection channels and 32 speed detection channels with unequal intervals. The diameter detection range is 0.2 to 25mm, and the speed detection range is 0.2 to 20m / s.

[0075] During the calibration of the nozzle parameters, the detailed structure and internal construction of the nozzle and the principle of water spraying do not affect the calibration process. The nozzle is installed at different positions in the same pipeline. The water spray volume, water spray speed, water spray angle, water spray shape and water spray particle size distribution; the rainwater particle size distribution is measured separately by a raindrop spectrum meter, such as Figure 7 As shown, the rainwater particle size and distribution pattern are important indicators that need to be corrected in the later calibration process;

[0076] Since the same pipe has different distances from the water source, the pipe wall pressure will be different. The water pressure provided to the nozzle by opening holes at different positions in the pipe will be different, such as Figure 8 As shown, the nozzle parameters of the nozzle are affected, including: water spray volume, water spray speed, water spray angle and water spray shape; the principle formula is:

[0077] p1=p0-ΔP1;

[0078] p2=p0-ΔP1-ΔP1 * ;

[0079]

[0080]

[0081] ΔP1 * =P 12 -P 11 ;

[0082] Where p0 is the pressure provided by the water supply pump, p1 and p2 are the surface pressures of the water supply pipe at different nozzle positions, ΔP1 is the cross-sectional resistance from the water supply source to the nozzle position, λ is the cross-sectional resistance coefficient, L is the distance of the cross-sectional resistance, D is the inner diameter of the pipe, v is the average flow velocity, g is the acceleration of gravity, ΔP1 * is the local pressure loss at nozzle position 1, Q 11 and Q 12 is the nozzle inlet and outlet flow rate, P 11 and P 12 is the nozzle inlet and outlet pressure, n is the nozzle index, different spray shapes have different indexes, usually 0.5.

[0083] Therefore, when calibrating the water spraying parameters of the sprinklers at different positions of the same water supply pipe, they need to be calibrated separately, that is, after executing S101, execute S102;

[0084] S102, simulating the spraying state of a single nozzle, such as Fig. 9 As shown, the water spray parameters are corrected in the simulation software to make the water spray parameters of the simulated single nozzle and the test nozzle consistent, that is, the spray distance, height and spray form of the test and simulated single nozzle are consistent, and the single nozzle no-wind load state calibration is completed;

[0085] S103, the nozzle parameters of each nozzle are loaded onto each nozzle of the simulated pipe network matrix, and the wind-free state calibration of the nozzle of the pipe network matrix is ​​completed; after the nozzle has stabilized the water supply pressure and flow throughout the day, the water spray flow of each nozzle is taken, such as Fig.10 shown.

[0086] The above calibration only completes the calibration in the no-wind load state. This method and process can be simultaneously applied to the calibration of the shower room sprinkler.

[0087] In order to simulate the driving conditions of vehicles in rainy days, it is necessary to calibrate the spray parameters and water spraying forms of the rain pipe network matrix in the state with the flow field boundary environment. It is required to calibrate the driving conditions in rainy days under different driving speeds (at least covering the commonly used test speeds, such as 40-140km / h, every 10km / h). Therefore, this scheme also executes S2 to calibrate the water spraying state of the pipe network matrix with wind load;

[0088] S2, calibrating the wind-loaded state of the pipe network matrix water spraying, including: the pipe network matrix is ​​in a state with a flow field boundary environment, executing S101-S103, completing the wind-loaded state calibration of the pipe network matrix water spraying, including:

[0089] The flow field of the empty wind tunnel is calibrated to make the simulated flow field consistent with the test flow field. Before using the flow field boundary, the flow field of the empty wind tunnel needs to be calibrated to ensure that the simulation and test flow fields are consistent. Third-party software can be used to combine the three-dimensional structure of the environmental wind tunnel to simulate the flow field of the empty wind tunnel and conduct test calibration, such as Fig.11 and Fig.12 As mentioned above, the simulation results are benchmarked against the experimental test values ​​to ensure consistency;

[0090] The flow field calibration result output is used as the flow field boundary input for rain field calibration;

[0091] Under the flow field boundary environment, execute S101-S103 to complete the calibration of the pipe network matrix water spray with wind load.

[0092] Specifically, the water spray parameters of each nozzle in the test pipe network matrix with the flow field boundary environment are collected; the nozzle calibration method under the wind-free state is adopted, and the spray angle of each nozzle is measured in turn under the wind-load condition, and the static value is corrected to form a spray angle curve that changes with wind speed and is used for correction, such as Fig.13 As shown;

[0093] Under the condition of flow field boundary environment, the single nozzle spraying state is simulated, and the spraying parameters are corrected so that the spraying parameters of the simulated single nozzle and the test nozzle are consistent, thus completing the calibration of the single nozzle with wind load state;

[0094] Under the state of flow field boundary environment, the nozzle parameters of each nozzle are loaded onto each nozzle of the simulated pipe network matrix to complete the calibration of the wind load state of the pipe network matrix nozzle.

[0095] S3. Determine whether the rain environment constructed by the simulated pipe network matrix sprinkler is consistent with the test rain environment. If so, complete the numerical simulation calibration of the shower sprinkler and the sprinkler pipe network matrix, including:

[0096] The same interface is selected in the rain environment constructed by the simulated pipe network matrix sprinkler and the test rain environment, and the rain intensity at the interface is measured respectively;

[0097] Determine whether the simulated rain intensity is consistent with the test rain intensity. If so, determine whether the rain environment constructed by the simulated pipe network matrix sprinkler is consistent with the test rain environment, and complete the numerical simulation calibration of the shower sprinkler and sprinkler pipe network matrix; determine whether the simulated rain intensity is consistent with the test rain intensity. The consistency requirement is that the state law is the same, and the difference in amplitude meets the preset difference range, such as Fig.14 As shown, this method can be used for calibration for different wind speed load boundary conditions; if not, the simulated rain intensity can be adjusted until the simulated rain intensity is consistent with the test rain intensity.

[0098] With the help of water management development simulation software, this solution can calibrate the water spray parameters of different sprinklers in the pipe network matrix, and the calibrated parameters can be used as the rain field boundary input for water management simulation under corresponding working conditions, thereby improving the reliability of simulation analysis results, the consistency between simulation and test, and the high repeatability of experiments, which can save a lot of manpower, financial resources and time, and shorten the project development cycle.

[0099] The above is only an embodiment of the present invention. The common sense such as the known specific structure and characteristics in the scheme is not described in detail here. The ordinary technicians in the relevant field know all the common technical knowledge in the technical field of the invention before the application date or priority date, can obtain all the existing technologies in the field, and have the ability to apply the conventional experimental means before that date. The ordinary technicians in the relevant field can improve and implement this scheme in combination with their own abilities under the enlightenment given by this application. Some typical known structures or known methods should not become obstacles for ordinary technicians in the relevant field to implement this application. It should be pointed out that for those skilled in the art, without departing from the structure of the present invention, several deformations and improvements can be made, which should also be regarded as the protection scope of the present invention, which will not affect the effect of the implementation of the present invention and the practicality of the patent. The protection scope required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. A numerical simulation calibration method for a shower nozzle and a nozzle pipe network matrix, characterized in that: include: S1. Calibrate the water spraying in the pipe network matrix in the windless state, including: S101, collecting water spray parameters of each nozzle in the pipe network matrix of the test; the water spray parameters include: water spray volume, water spray angle, water spray speed, water spray particle size and distribution; S102, simulating the spraying state of a single sprinkler head, and correcting the spraying parameters, so that the spraying parameters of the simulated single sprinkler head and the tested sprinkler head are consistent, and completing the calibration of the single sprinkler head in the no-wind load state; S103, loading the nozzle parameters of each nozzle onto each nozzle of the simulated pipe network matrix, and completing the calibration of the nozzle of the pipe network matrix in a no-wind load state; S2, calibrating the water spraying state of the pipe network matrix with wind load, including: executing S101-S103 in the state of the pipe network matrix with flow field boundary environment to complete the calibration of the water spraying state of the pipe network matrix with wind load; S3, judging whether the rain environment constructed by the simulated pipe network matrix sprinkler is consistent with the rain environment of the test, and if so, completing the numerical simulation calibration of the shower sprinkler and the sprinkler pipe network matrix; The S101 includes: Rainwater collection equipment is used to collect and count the water volume of a single sprinkler, and the water volume is corrected to obtain the actual water volume of each sprinkler, including: q0=q1+q2+…+q n ; Q n =γ n Q0; Where q0 is the measured water volume in the pipeline, q n To measure the water spray volume of each nozzle, γ n Q is the water spray correction coefficient of each nozzle, n is the actual water spray volume of each nozzle, Q0 is the actual water supply volume fed back by the water supply system; A raindrop meter is used to measure the spray angle of the sprinkler. Combined with the spray pattern, the spray velocity and spray angle of the sprinkler are obtained according to the rainwater spray principle model.

2. The numerical simulation calibration method of the shower nozzle and the nozzle pipe network matrix according to claim 1 is characterized in that: The method of using a raindrop meter to measure the spray angle of the sprinkler head, combining the spray form, and obtaining the spray speed and spray angle of the sprinkler head according to the rainwater spray principle model includes: in x =what; v y =all; s1=v x t1; <h2 style=";text-align:left;direction:ltr">s2=v<h2 style=";text-align:left;direction:ltr"> x <h2 style=";text-align:left;direction:ltr"> t2; where v x 、v y is the initial velocity component of the nozzle's spray velocity in the horizontal and vertical directions, a is the angle between the nozzle's spray direction and the horizontal direction, t is the time interval from the nozzle spraying water to the ground, h is the height from the nozzle's spraying point to the ground, and s is the horizontal distance from the nozzle's spraying point to the landing point.

3. The numerical simulation calibration method of the shower nozzle and the nozzle pipe network matrix according to claim 1 is characterized in that: The pipe network matrix executes S101-S103 in a state with a flow field boundary environment to complete the calibration of the pipe network matrix water spray with wind load, including: Calibrate the flow field of the empty wind tunnel to make the simulated flow field consistent with the test flow field; The flow field calibration result output is used as the flow field boundary input for rain field calibration; Under the state with flow field boundary environment, execute S101-S103 to complete the calibration of the wind load state of the pipe network matrix water spray.

4. The numerical simulation calibration method for the shower nozzle and the nozzle pipe network matrix according to claim 1 is characterized in that: The S3 includes: The same interface is selected in the rain environment constructed by the simulated pipe network matrix sprinkler and the test rain environment, and the rain intensity at the interface is measured respectively; Determine whether the simulated rain intensity is consistent with the test rain intensity. If so, determine that the rain environment constructed by the simulated pipe network matrix sprinkler is consistent with the test rain environment, and complete the numerical simulation calibration of the shower nozzle and the sprinkler pipe network matrix.

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