Fuel nozzle atomization field measuring point arrangement method and atomization characteristic measuring system

Abstract

The invention relates to the technical field of aeroengine fuel nozzle atomization characteristic tests, in particular to a fuel nozzle atomization field measuring point arrangement method and an atomization characteristic measuring system. The fuel nozzle atomization field measuring point arrangement method comprises the following steps: S1, identifying a nozzle structure type and a working state, wherein the working state comprises a non-gas-liquid coupling state or a gas-liquid coupling state; s2, selecting one of a cross line method, a grid line method or a quadrant and symmetric line method as a measuring point arrangement method according to an identification result of the step S1; s3, setting the step length between adjacent measuring points on the measuring section as the density of the measuring points; s4, determining the boundary position of the atomization field based on the total particle concentration or the effective diameter number measured in real time by PDPA; and S5, expanding the boundary determined in the step S4 by 2-3 measuring point step lengths, and generating a final measuring point arrangement scheme. And aiming at different types of nozzle structures, a measuring point arrangement method is adopted when the atomization field is measured by PDPA, so that the effectiveness and authenticity of measurement data acquisition are improved.

Description

Technical Field

[0001] This invention relates to the field of atomization characteristic testing technology for aero-engine fuel nozzles, and particularly to a method for arranging measuring points in a fuel nozzle atomization field and a system for measuring atomization characteristics. Background Technology

[0002] As a key component of the aero-engine combustion chamber, the fuel nozzle directly impacts its performance. Its performance determines not only fuel atomization characteristics, droplet evaporation efficiency, concentration field distribution, combustion completeness, and ignition characteristics, but also significantly affects the combustion chamber temperature distribution, overall engine combustion efficiency, and pollutant emission characteristics. Therefore, measuring the fuel nozzle atomization performance parameters is crucial for understanding combustion chamber performance. Currently, the industry primarily uses optical measurements for spray atomization characteristics, with phase-shifting Doppler particle size analyzers being the most widely used.

[0003] A Phase Doppler Particle Analyzer (PDPA) is used to measure parameters such as droplet size, velocity, and distribution in an atomized field. Due to its high measurement accuracy and non-contact measurement method, this device is widely used in the field of atomization measurement. The PDPA mainly consists of a solid-state laser (also called a laser emitter), a particle size receiving probe (also called a signal receiver), a photoelectric converter, a signal processor, a three-dimensional motorized measuring frame, and a computer. Its workflow is: laser - measuring body - receiving probe - photoelectric converter - signal processor - software processing. The instrument uses two beams of the same frequency to intersect and form a measurement point. Utilizing the principle of light coherence, it measures the frequency shift and phase shift of each moving particle as it passes through the measurement point, thereby obtaining the particle's velocity and size. After a certain period, statistical values ​​of atomization parameters such as droplet size and velocity at the measurement point are obtained by statistically analyzing the particle information at that point.

[0004] As a single-point measurement device, PDPA relies on multiple measurement points connected in series to complete the full-field scan, and its overall measurement efficiency is directly affected by the scientific nature of the measurement point layout scheme.

[0005] Current traditional measurement point layout methods have significant limitations: on the one hand, they lack systematic theoretical guidance and generally rely on empirical rules (such as uniform point distribution), leading to inconsistent measurement point schemes and result deviations in different experiments for the same nozzle structure due to differences in operator subjective judgment; on the other hand, empirical point layout methods are difficult to accurately focus on the key measurement areas of the atomization field, easily causing data blind spots or measurement redundancy. Therefore, it is urgent to establish a point layout method adapted to the characteristics of the nozzle structure to achieve efficient and accurate atomization field measurement. Summary of the Invention

[0006] The main objective of this invention is to propose a method for arranging measuring points in the atomization field of a fuel nozzle and a system for measuring atomization characteristics, in order to solve the aforementioned technical problems.

[0007] To achieve the above objectives, on the one hand, this invention proposes a method for arranging measuring points in the atomization field of a fuel nozzle, the steps of which include: S1. Identify the nozzle structure type and working state, including non-gas-liquid coupling state or gas-liquid coupling state; S2. Based on the identification results of step S1, select one of the following methods as the measurement point layout method: cross-line method, grid line method, or quadrant plus symmetry line method. S3. Set the step size between adjacent measuring points on the measuring section as the measuring point density; S4. Determine the boundary position of the atomization field based on the total particle concentration or effective diameter number measured in real time by PDPA. S5. Expand the boundary determined in step S4 by 2-3 measurement point steps to generate the final measurement point layout scheme.

[0008] Preferably, the classification of nozzle structure types in step S1 includes: Centrifugal nozzles, pneumatic atomizing nozzles, or direct-fire nozzles in non-gas-liquid coupling states; Centrifugal nozzle and vortex assembly, pneumatic atomizing nozzle and vortex assembly, or direct-fire nozzle air supply structure under gas-liquid coupling state.

[0009] Preferably, the implementation method of selecting the cross-line method in step S2 is as follows: The physical center of the nozzle is projected onto the measurement section as the origin of the coordinate system. Using the mutually perpendicular X-axis and Y-axis passing through the origin as reference lines, measuring points are symmetrically arranged along the reference line direction at a set step size.

[0010] Preferably, the implementation method of selecting quadrants and adding symmetry lines in step S2 is as follows: The measurement section is divided into four quadrants, and an unobstructed single quadrant is selected as the measurement area. With the equivalent center within the quadrant as the origin, at least three measurement lines are evenly distributed; One of the measurement lines passes through the origin and extends into the global atomization field, maintaining symmetry.

[0011] Preferably, the implementation method of selecting the grid line method in step S2 is as follows: The physical center of the nozzle is projected onto the measurement section as the origin of the coordinate system. A grid-like array of measuring points is formed by multiple equally spaced straight lines passing through the origin.

[0012] Preferably, in step S3, the rule for setting the density of measuring points is as follows: The step size control under non-gas-liquid coupling state is 2-3 mm; The step size can be increased to 5 mm in the gas-liquid coupling state.

[0013] Preferably, the criterion for determining the boundary of the atomization field in step S4 is: When the total particle concentration measurement is less than 1; or When the effective diameter measurement is less than 10.

[0014] Preferably, the boundary expansion operation in step S5 includes: The critical measurement points are defined as total particle concentration less than 1 or effective diameter number less than 10, and the locations of the critical measurement points are defined as the initial boundary points; the initial boundary is obtained by connecting multiple initial boundary points. The final boundary is formed by expanding outward by 2-3 measurement points along the direction of the initial boundary normal.

[0015] Preferably, when the nozzle is a direct-fire nozzle: A spatial coordinate system is established with the center of the nozzle of the direct-injection nozzle as the origin and the fuel injection direction as the Z-axis; The measurement points are laid out using a grid line method on the measurement section parallel to the YZ plane; If the atomization field is symmetrical about the fuel injection direction, only half of the atomization field is measured.

[0016] On the other hand, the present invention also proposes a fuel nozzle atomization characteristic measurement system, comprising: The Phase Shift Doppler Particle Size Analyzer (PDPA) includes a solid-state laser, a receiving probe, a photoelectric converter, and a signal processor. A three-dimensional electric moving probe is mechanically connected to the receiving probe and drives it to move in the XYZ directions; The control computer is configured to execute the above-described method for arranging measurement points in the fuel nozzle atomization field. The system acquires TPC and DVC parameters in real time through a signal processor and automatically performs boundary determination and expansion operations.

[0017] Due to the adoption of the above technical solution, the beneficial effects of the present invention are as follows: (1) The fuel nozzle atomization field measurement point arrangement method provided by this invention achieves a breakthrough in the integrity and authenticity of atomization field data. The point arrangement method is dynamically selected according to the nozzle type and status, eliminating the subjective bias of traditional experience-based point arrangement and ensuring the consistency of measurement schemes for the same nozzle structure. The total particle concentration (TPC) <1 or effective diameter number (DVC) <10 is used as the boundary standard to accurately locate the edge of the atomization field and avoid data blind spots or redundant measurements. With the critical measurement point as the initial boundary, the measurement point is expanded outward by 2-3 measurement point steps along the normal direction to capture the droplet size and velocity distribution at the edge, ensuring the integrity of the entire field data.

[0018] (2) The fuel nozzle atomization field measurement point arrangement method provided by this invention solves the limitations of existing PDPA measurement point arrangement methods that generally rely on experience or simple geometric symmetry principles. It proposes a scientific and systematic measurement point arrangement method and atomization field boundary discrimination standard. This method improves the effectiveness and authenticity of atomization field measurement and effectively fills the gap in the lack of fixed measurement point arrangement methods in this field, and has significant technical application value.

[0019] (3) The fuel nozzle atomization field measurement point arrangement method provided by this invention, through scientific planning of the measurement point location and correction of the measurement point arrangement in combination with PDPA data, significantly improves the measurement speed and data acquisition efficiency of PDPA under different nozzle structures and nozzle-vortex combination scenarios, providing more reliable technical support for atomization field characteristic analysis. The method of clarifying the atomization field measurement point arrangement for different nozzle structures and nozzle-vortex combination components enables PDPA to obtain useful data more accurately and efficiently when measuring the atomization field. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0021] Figure 1 The arrangement of the laser transmitter and receiver of the PDPA device on a three-dimensional coordinate frame; Figure 2 A schematic diagram of the layout of measuring points using the cross-line method; Figure 3 A schematic diagram of the layout of measuring points using the quadrant symmetry line method; Figure 4 This is a schematic diagram of the grid line method measurement point layout; Figure 5 This is a schematic diagram of the grid line method for arranging measuring points in the atomization field of a direct-fire nozzle. Detailed Implementation

[0022] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0023] On the one hand, this embodiment provides a method for arranging measuring points in the atomization field of a fuel injector, the steps of which include: S1. Identify the nozzle structure type and working state, including non-gas-liquid coupling state or gas-liquid coupling state; S2. Based on the identification results of step S1, select one of the following methods as the measurement point layout method: cross-line method, grid line method, or quadrant plus symmetry line method. S3. Set the step size between adjacent measuring points on the measuring section as the measuring point density; S4. Determine the boundary position of the atomization field based on the total particle concentration or effective diameter number measured in real time by PDPA. S5. Expand the boundary determined in step S4 by 2-3 measurement point steps to generate the final measurement point layout scheme.

[0024] The classification of nozzle structure types in step S1 includes: In non-gas-liquid coupling conditions, fuel nozzles can be classified into centrifugal nozzles, pneumatic atomizing nozzles, and direct-injection nozzles. Among these, atomization measurements of pneumatic atomizing nozzles and direct-injection nozzles in non-gas-liquid coupling conditions are rarely performed.

[0025] In the gas-liquid coupling state, the nozzle structure is divided into three types: centrifugal nozzle and vortex assembly, pneumatic atomizing nozzle and vortex generator assembly, and direct-shot nozzle.

[0026] Before conducting measurements, the specific nozzle structure type needs to be identified. Nozzle structure classifications are shown in Table 1: Table 1 Nozzle Structure Classification In step S2: The implementation method of the cross-line method is as follows: the physical center of the nozzle is projected onto the measurement section as the origin of the coordinate system; the X-axis and Y-axis, which are perpendicular to each other and pass through the origin, are used as reference lines, and the measurement points are arranged symmetrically along the reference line direction at a set step size.

[0027] The implementation method of the quadrant plus symmetry line method is as follows: the measurement section is divided into four quadrants, and an unobstructed single quadrant is selected as the measurement area; with the equivalent center in the quadrant as the origin, no less than 3 measurement lines are evenly distributed; one of the measurement lines passes through the origin and extends into the global atomization field to maintain symmetry.

[0028] The implementation method of the grid line method is as follows: the physical center of the nozzle is projected onto the measurement section as the origin of the coordinate system; multiple equally spaced straight lines passing through the origin are used to form a grid-like array of measurement points.

[0029] Specifically, for centrifugal nozzles in non-gas-liquid coupled states, a measurement coordinate system is established by projecting the physical center of the nozzle onto the measurement cross section. Using this projection point (origin) as a reference, a cross-shaped line symmetrical about the XY axes is preferentially used as the basis for arranging the measurement point network. For single-path centrifugal nozzles, when constrained by the arrangement of the PDPA laser transmitter or receiver, or when the measurement area is obstructed, the system is divided into four quadrants according to the XY coordinates. A suitable quadrant is selected, and at least three measurement lines are evenly distributed in that quadrant, with the equivalent center as the origin, according to angles. One of these measurement lines must pass through the origin and maintain symmetry in the global atomization field. This is the quadrant plus symmetry line method.

[0030] For pneumatic atomizing nozzles and direct-fire nozzles in non-gas-liquid coupling states, a measurement coordinate system is established by projecting the physical center of the nozzle onto the measurement section. With this projection point as the origin, multiple equally spaced lines passing through the origin are arranged in a grid pattern. This is the grid line method.

[0031] For gas-liquid coupling, the measuring points of the centrifugal nozzle and vortex generator assembly should preferably be arranged using the grid line method. If conditions are limited, the quadrant plus symmetry line method can be used.

[0032] For gas-liquid coupling, the grid line method is preferred for arranging measurement points in the pneumatic atomizing nozzle and vortex generator assembly. If conditions are limited, the quadrant plus symmetry line method can be used to arrange measurement points.

[0033] For gas-liquid coupling conditions, the measuring points of the direct-fire nozzle are arranged using a grid line method.

[0034] The specific arrangement method described above is shown in Table 2.

[0035] Table 2 Nozzle measuring point arrangement method In step S3, the rule for setting the density of measuring points is as follows: the step size is controlled at 2-3 mm in the non-gas-liquid coupling state; the step size can be relaxed to 5 mm in the gas-liquid coupling state.

[0036] For different atomization field measurement locations, the atomization field boundary can be determined based on parameters such as Total Particle Concentration (TPC) and Diameter Valid Count (DVC) measured by PDPA. Generally, a TPC value less than 1 or a DVC value in single digits can be considered the boundary of the atomization field. Specifically, The specific boundary range should be determined by establishing a measurement coordinate system based on the projection of the nozzle's physical center onto the measurement section, and by measuring multiple different positions using PDPA to find the boundary. Generally, the atomization field of a single centrifugal nozzle can be considered as a near-circular distribution. In the gas-liquid coupling state, the centrifugal nozzle, pneumatic atomizing nozzle, and vortex generator assembly can also be considered as a near-circular distribution. In the gas-liquid coupling state, the atomization field of a direct-fire nozzle is an irregular shape, and its boundary can be appropriately relaxed to be considered as a square distribution.

[0037] Based on the nozzle structure, measuring point arrangement, measuring point density, atomization field boundary determination, and specific distribution method described above, the measuring point arrangement scheme can be determined. See Table 3 for the specific scheme.

[0038] Table 3 Nozzle measuring point layout scheme Combination Figure 1 The diagram shows the arrangement of the laser transmitter and receiver of the PDPA device on a three-dimensional coordinate frame. The actual arrangement can be adjusted according to measurement requirements, aiming to minimize obstruction of the field of view in front of the transmitting and receiving probes. Specific movement of measurement points must be achieved using the PDPA coordinate frame and its accompanying control software.

[0039] refer to Figure 2 As shown, for centrifugal nozzles in non-gas-liquid coupling states, a measurement coordinate system is established by projecting the physical center of the nozzle onto the measurement section at the required distance from the nozzle outlet. Using this projection point (origin) as the reference, the X and Y axes passing through the origin are preferentially used as crosshairs to arrange measurement points. The measurement point step size is controlled at 2-3 mm. For some larger atomization fields, the distance between measurement points should not exceed 5 mm. Simultaneously, the boundary of the atomization field should be determined based on TPC < 1 or DVC < 10 measured by PDPA at both ends of the crosshair. After clarifying the measurement point step size, measurement point arrangement method, and atomization field boundary, a measurement point arrangement scheme can be developed in the PDPA coordinate frame control software.

[0040] refer to Figure 3 As shown, if the oil mist concentration is too high or there is probe obstruction, the measurement section is divided into four quadrants according to the XY coordinates. Select one suitable quadrant, take the equivalent center as the origin, and distribute no less than 3 measurement lines evenly in that quadrant according to the angle (two of which should be perpendicular, and the remaining measurement lines are evenly distributed in the middle of the two measurement lines according to the angle). One of the measurement lines (one of the mutually perpendicular measurement lines) must pass through the origin and maintain symmetry in the global atomization field to ensure the symmetry of the atomization measurement. The step size of the remaining measurement points and the boundary judgment are the same as the cross-line method.

[0041] refer to Figure 4The diagram illustrates the grid-line method for arranging measurement points. At a measurement cross-section at the required distance from the nozzle outlet, the physical center of the nozzle is projected onto this cross-section to establish a measurement coordinate system. Using this projection point (origin) as the reference, measurement points are arranged using grid lines. The measurement point step size is controlled at 2-3 mm. For some larger atomization fields, the distance between measurement points should not exceed 5 mm. Simultaneously, the boundary of the atomization field must be manually identified, using the measurement points' TPC < 1 or DVC < 10 as the criterion. Connecting multiple measurement points yields the preliminary atomization boundary. In actual experiments, the measurement points need to be appropriately widened by 2-3 points based on the preliminary atomization boundary to ensure the integrity of the atomization field measurement. After clarifying the measurement point step size, arrangement method, and atomization field boundary, a measurement point arrangement scheme can be developed in the PDPA coordinate frame control software. This method is applicable to pneumatic atomizing nozzles / direct-shot nozzles in non-gas-liquid coupling states and centrifugal nozzles / pneumatic atomizing nozzles in gas-liquid coupling states. (Reference) Figure 3 If the oil mist concentration is too high or the probe is blocked, the centrifugal nozzle / pneumatic atomizing nozzle in gas-liquid coupling state can use the quadrant plus symmetry line method to arrange the measurement points as described above. However, the atomization boundary still needs to be manually found and widened by 2 to 3 measurement points.

[0042] refer to Figure 5 For direct-injection nozzles in gas-liquid coupling state, with the nozzle as the origin of the XYZ coordinate system and the fuel injection direction as the Z-axis, the measurement section (parallel to the YZ section and meeting the required distance) is located at the required distance from the nozzle along the airflow direction (X-axis direction).

[0043] Measuring points are arranged using a grid, with a step size of 2-3 mm. For larger atomization fields, the distance between measuring points should not exceed 5 mm. The boundary of the atomization field must be manually determined, using a TPC < 1 or DVC < 10 measured by PDPA as the criterion. Connecting multiple measuring points yields the preliminary atomization boundary. In actual testing, the measuring points should be appropriately widened by 2-3 points based on the preliminary atomization boundary to ensure the completeness of the atomization field measurement. Due to the larger atomization of direct-injection nozzles, if the manually determined boundary exhibits symmetry relative to the fuel injection direction, testing can be conducted by collecting data from half of the atomization field.

[0044] In summary, for centrifugal nozzles in non-gas-liquid coupled states, the cross-line method is preferred; when constrained, the quadrant plus symmetry line method is used. For nozzles in gas-liquid coupled states, the grid line method is preferred; when constrained, the quadrant plus symmetry line method is used. The atomization field boundary is determined by TPC (Total Particle Concentration) < 1 or DVC (Diameter of Variable Capacity) < 10. The boundary shape is circular or an irregular shape / square, depending on the nozzle type. For direct-injection nozzles in gas-liquid coupled states, only the grid method can be used. If the atomization field is symmetrical with respect to the fuel injection direction, half of the atomization field can be collected during the test. In actual testing, after obtaining the preliminary atomization boundary, the measurement points should be appropriately widened by 2-3 points to ensure the completeness of the atomization field measurement. In addition, this embodiment also provides a fuel injector atomization characteristic measurement system, including: The Phase Shift Doppler Particle Size Analyzer (PDPA) includes a solid-state laser, a receiving probe, a photoelectric converter, and a signal processor. A three-dimensional electric moving probe is mechanically connected to the receiving probe and drives it to move in the XYZ directions; The control computer is configured to execute the fuel nozzle atomization field measurement point arrangement method as described in any one of claims 1 to 9; The system acquires TPC and DVC parameters in real time through a signal processor and automatically performs boundary determination and expansion operations.

[0045] The above description is merely a preferred embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural transformations made using the contents of the present invention's specification and drawings under the inventive concept of the present invention, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. A method for arranging measuring points in the atomization field of a fuel nozzle, characterized in that the steps include: include: S1. Identify the nozzle structure type and working state, including non-gas-liquid coupling state or gas-liquid coupling state; S2. Based on the identification results of step S1, select one of the following methods as the measurement point layout method: cross-line method, grid line method, or quadrant plus symmetry line method. S3. Set the step size between adjacent measuring points on the measuring section as the measuring point density; S4. Determine the boundary position of the atomization field based on the total particle concentration or effective diameter number measured in real time by PDPA. S5. Expand the boundary determined in step S4 by 2-3 measurement point steps to generate the final measurement point layout scheme.

2. The method for arranging measuring points in the atomization field of a fuel nozzle as described in claim 1, characterized in that, The classification of nozzle structure types in step S1 includes: Centrifugal nozzles, pneumatic atomizing nozzles, or direct-fire nozzles in non-gas-liquid coupling states; Centrifugal nozzle and vortex assembly, pneumatic atomizing nozzle and vortex assembly, or direct-fire nozzle air supply structure under gas-liquid coupling state.

3. The method for arranging measuring points in the atomization field of a fuel nozzle as described in claim 1, characterized in that, The implementation method of the cross-line method selected in step S2 is as follows: The physical center of the nozzle is projected onto the measurement section as the origin of the coordinate system. Using the mutually perpendicular X-axis and Y-axis passing through the origin as reference lines, measuring points are symmetrically arranged along the reference line direction at a set step size.

4. The method for arranging measuring points in the atomization field of a fuel nozzle as described in claim 1, characterized in that, The implementation method of selecting the quadrant plus symmetry line method in step S2 is as follows: The measurement section is divided into four quadrants, and an unobstructed single quadrant is selected as the measurement area. With the equivalent center within the quadrant as the origin, at least three measurement lines are evenly distributed; One of the measurement lines passes through the origin and extends into the global atomization field, maintaining symmetry.

5. The method for arranging measuring points in the atomization field of a fuel nozzle as described in claim 1, characterized in that, The implementation method of the grid line method selected in step S2 is as follows: The physical center of the nozzle is projected onto the measurement section as the origin of the coordinate system. A grid-like array of measuring points is formed by multiple equally spaced straight lines passing through the origin.

6. The method for arranging measuring points in the atomization field of a fuel nozzle as described in claim 1, characterized in that, In step S3, the rule for setting the density of measuring points is as follows: The step size control under non-gas-liquid coupling state is 2-3 mm; The step size can be increased to 5 mm in the gas-liquid coupling state.

7. The method for arranging measuring points in the atomization field of a fuel nozzle as described in claim 1, characterized in that, The criteria for determining the boundary of the atomization field in step S4 are as follows: When the total particle concentration measurement is less than 1; or When the effective diameter measurement is less than 10.

8. The method for arranging measuring points in the atomization field of a fuel nozzle as described in claim 7, characterized in that, The boundary expansion operation in step S5 includes: The critical measurement points are defined as total particle concentration less than 1 or effective diameter number less than 10, and the locations of the critical measurement points are defined as the initial boundary points; the initial boundary is obtained by connecting multiple initial boundary points. The final boundary is formed by expanding outward by 2-3 measurement points along the direction of the initial boundary normal.

9. The method for arranging measuring points in the atomization field of a fuel nozzle as described in claim 1, characterized in that, When the nozzle is a direct-fire nozzle: A spatial coordinate system is established with the center of the nozzle of the direct-injection nozzle as the origin and the fuel injection direction as the Z-axis; The measurement points are laid out using a grid line method on the measurement section parallel to the YZ plane; If the atomization field is symmetrical about the fuel injection direction, only half of the atomization field is measured.

10. A fuel nozzle atomization characteristic measurement system, characterized in that, include: The Phase Shift Doppler Particle Size Analyzer (PDPA) includes a solid-state laser, a receiving probe, a photoelectric converter, and a signal processor. A three-dimensional electric moving probe is mechanically connected to the receiving probe and drives it to move in the XYZ directions; The control computer is configured to execute the fuel nozzle atomization field measurement point arrangement method as described in any one of claims 1 to 9; The system acquires TPC and DVC parameters in real time through a signal processor and automatically performs boundary determination and expansion operations.

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