Combined atomization test device

Abstract

The invention discloses a combined atomization test device, which belongs to the technical field of fuel oil atomization, and comprises an experiment seat, a pressure stabilizing cavity, a pressure stabilizing device and a control device, the swirler is arranged on the experiment seat, and a gas channel communicated with the interior of the pressure stabilizing cavity is arranged on the swirler; the fuel oil nozzle is provided with an oil spraying opening corresponding to the swirler and is used for spraying atomized fuel oil, so that the atomized fuel oil and air flow at an outlet of an air inlet channel of the swirler are combined to form an oil mist field; the air inlet seat is communicated with the experiment seat, a disturbance suppression path is formed between the air inlet seat and the experiment seat, and the disturbance suppression path comprises at least two direction turning sections and is used for weakening airflow disturbance. The problem of instability caused by the fact that airflow directly enters a cyclone in a traditional test device is solved, and repeatability of a spray field in an atomization experiment is improved.

Description

Technical Field

[0001] This invention relates to the field of fuel atomization technology, specifically to a combined atomization test device. Background Technology

[0002] The fuel-air matching characteristics of the combustor head have a significant impact on the combustion stability, atomization uniformity, and emission performance of aero-engines. During combustor development, the combined atomization performance of the fuel nozzle and swirler is often tested to indirectly evaluate its combustion performance. Because the high-temperature, high-pressure environment inside the combustor makes direct observation of the flame morphology difficult, combined atomization testing has become a common method for simulating actual combustion conditions and verifying nozzle spray effectiveness.

[0003] In existing technologies, experimental setups typically employ a method of directly introducing an external air source into the cyclone separator to provide the inlet airflow. However, due to the relatively small inlet flow rate of a single cyclone separator, the directly introduced airflow is prone to velocity fluctuations and pressure disturbances after passing through a long pipeline, resulting in significant instability before entering the cyclone separator. Furthermore, minute pressure pulsations or external disturbances in the air source can be amplified within the pipeline, affecting the consistency of the airflow at the cyclone separator inlet. These disturbances fail to effectively reflect the impact of stable airflow on spray characteristics under real-world operating conditions, thus reducing the accuracy and repeatability of combined atomization test results. Summary of the Invention

[0004] This invention provides a combined atomization test device to solve the technical problem of poor stability of existing atomization test devices.

[0005] According to one aspect of the present invention, a combined atomization test apparatus is provided, comprising a test stand having a pressure stabilizing chamber; a cyclone separator disposed on the test stand, the cyclone separator having a gas passage communicating with the pressure stabilizing chamber; a fuel nozzle having a fuel injection port corresponding to the cyclone separator for injecting atomized fuel, so that the atomized fuel and the airflow at the outlet of the cyclone separator's air inlet passage combine to form an oil mist field; and an air inlet seat communicating with the test stand, a disturbance suppression path being formed between the air inlet seat and the test stand, the disturbance suppression path including at least two directional turning sections for weakening airflow disturbance.

[0006] Optionally, the air intake seat includes an air intake connector and an exhaust pipe. The air intake connector is provided with an air intake hole for connecting to an external air source, and the exhaust pipe is provided with an exhaust hole that connects the air intake hole and the pressure stabilizing chamber. The connection between the air intake hole and the exhaust hole is set at an angle to form a first direction turning section. The connection between the exhaust hole and the pressure stabilizing chamber is set at an angle to form a second direction turning section.

[0007] Optionally, the included angle between the first directional turning segment and the second directional turning segment is 90°.

[0008] Optionally, the air intake connector is provided with multiple air intake holes, which are radially distributed with the center line of the exhaust hole as the center.

[0009] Optionally, the air intake holes on the air intake connector are evenly distributed so that the included angle between adjacent air intake holes is consistent.

[0010] Optionally, the experimental stand includes a base and a cylinder connected by threads, a hydrocyclone is mounted on the base, and a hydrocyclone pressure ring is provided on the side of the hydrocyclone away from the base, the hydrocyclone pressure ring being clamped between the base and the cylinder.

[0011] Optionally, a static pressure measuring seat is provided at the end of the cylinder away from the base, and a pressure measuring hole communicating with the pressure stabilizing chamber is opened on the static pressure measuring seat.

[0012] Optionally, the height of the centerline of the exhaust port from the base is H, and the diameter of the pressure regulating chamber is D, satisfying 2D. <H<3D。

[0013] Optionally, the fuel nozzle is mounted on the cylinder, with the end face of the cylinder fitting against the upper end face of the cyclone separator pressure ring to define the relative position of the fuel nozzle and the cyclone separator.

[0014] Optionally, the distance between the outlet end face of the cyclone separator's air inlet channel and the lower end face of the base is S, and satisfies 0.5mm. <S<1mm。

[0015] In summary, this application includes at least one of the following beneficial technical effects: This design cleverly guides the airflow through multiple directional changes before it enters the cyclone separator by establishing a disturbance suppression path with at least two directional turning sections between the air inlet and the experimental base. This effectively weakens the highly turbulent airflow that would otherwise be directly introduced from the outside. Specifically, the airflow first undergoes a first directional turn after converging through multiple air inlets, entering the exhaust channel to form an initial buffer. It then undergoes a second turn before entering the pressure stabilizing chamber. During this process, airflow disturbances are dispersed and dissipated multiple times, resulting in a stable, uniform, and slow airflow within the pressure stabilizing chamber. The cyclone separator draws air from this pressure stabilizing chamber, thus obtaining a stable, low-disturbance intake airflow. This structure avoids the instability problems caused by the direct entry of airflow into the cyclone separator in traditional experimental setups, improves the repeatability of the spray field in atomization experiments, and effectively ensures the accuracy of nozzle and cyclone separator combination atomization performance testing.

[0016] In addition to the objectives, features, and advantages described above, the present invention has other objectives, features, and advantages. The invention will now be described in further detail with reference to the figures. Attached Figure Description

[0017] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings: Figure 1 This is a schematic diagram of the combined atomization test device of the present invention; Figure 2 This is a schematic diagram of the cylindrical structure of the present invention; Figure 3 This is a cross-sectional view of the air intake seat of the present invention; Figure 4 for Figure 3 A sectional view along the middle AA; Figure 5 This is a schematic diagram of the base structure of the present invention; Figure 6 This is a cross-sectional view of the cyclone separator pressure ring of the present invention; Figure 7 This is a schematic diagram of the hydrocyclone pressure ring structure of the present invention.

[0018] Legend: 10. Cylinder body; 101. Pressure stabilizing chamber; 11. Nozzle mounting seat; 12. External thread; 13. Pressure measuring hole; 14. Inlet seat mounting hole; 15. Hexagonal head; 16. Static pressure seat mounting hole; 20. Base; 21. Fixed mounting hole; 22. Cyclone mounting hole; 23. Support plane; 24. Internal thread; 30. Cyclone pressure ring; 301. Inlet passage; 31. Upper end face; 32. Positioning boss; 33. Clamping surface; 34. Bottom surface; 40. Inlet seat; 41. Inlet connector; 411. Inlet hole; 42. Exhaust pipe; 421. Exhaust hole; 50. Static pressure measuring seat; 60. Cyclone; 70. Fuel nozzle. Detailed Implementation

[0019] The embodiments of the present invention will be described in detail below with reference to the accompanying drawings. However, the present invention can be implemented in many different ways as defined and covered below.

[0020] The following is in conjunction with the appendix Figure 1-7 This application will be described in further detail.

[0021] This application discloses a combined atomization test device.

[0022] Reference Figure 1The combined atomization test apparatus includes a test stand, a cyclone separator 60, a fuel nozzle 70, and an air inlet seat 40. The test stand has a pressure stabilizing chamber 101. The cyclone separator 60 is mounted on the test stand and has a gas channel communicating with the pressure stabilizing chamber 101. The fuel nozzle 70 has an injection port corresponding to the cyclone separator 60 for injecting atomized fuel, so that the atomized fuel and the airflow at the outlet of the gas channel of the cyclone separator 60 combine to form an oil mist field. The air inlet seat 40 is connected to the test stand, and a disturbance suppression path is formed between the air inlet seat 40 and the test stand. The disturbance suppression path includes at least two directional turning sections to weaken airflow disturbance.

[0023] The combined atomization test apparatus mounts a cyclone separator 60 on a test stand equipped with a pressure stabilizing chamber 101. Fuel nozzles 70 spray atomized fuel directly into the cyclone separator 60, allowing the atomized fuel particles from the injector to fully mix with the stable airflow at the outlet of the cyclone separator 60, creating a uniform and visible fuel mist field to simulate the fuel-air mixture in a combustion chamber. The intake seat 40, connected to the test stand, provides an external air source to the pressure stabilizing chamber 101. A disturbance suppression path with at least two directional turning sections is established between the two, significantly reducing velocity fluctuations and pressure disturbances in the airflow entering the pressure stabilizing chamber 101 after multiple turns, ensuring greater stability of the airflow before entering the cyclone separator 60. The pressure stabilizing chamber 101 further buffers the airflow, providing a uniform and stable inlet airflow to the cyclone separator 60. The disturbance suppression path, through its structure, physically suppresses airflow disturbances in space, avoiding the turbulence and impact fluctuations caused by traditional straight-through pipes, thus improving the stability of combined atomization and the accuracy of test results.

[0024] Reference Figure 2 Specifically, the experimental stand is provided with an air inlet mounting hole 14, and the air inlet seat 40 is installed in the air inlet mounting hole 14. The size of the air inlet mounting hole 14 is precisely matched with the interface shape of the air inlet seat 40, and it can be fixed by welding, threaded connection or screw fastening. Preferably, the air inlet mounting hole 14 and the air inlet seat 40 are sealed together by argon arc welding to ensure airtightness and avoid airflow leakage or local pressure loss.

[0025] Reference Figure 1 and Figure 3In one embodiment, the air inlet 40 includes an air inlet connector 41 and an exhaust pipe 42. The air inlet connector 41 has an air inlet hole 411 for connecting to an external air source. The exhaust pipe 42 is connected to the air inlet connector 41, and an exhaust hole 421 is provided inside the exhaust pipe 42, which connects the air inlet hole 411 to the pressure stabilizing chamber 101 of the experimental base. Structurally, the connection between the air inlet hole 411 and the exhaust hole 421 is set at an angle, thereby forming a first directional turning section, causing the airflow entering from the outside to undergo a first directional turning in its flow path. The end of the exhaust pipe 42 is connected to the pressure stabilizing chamber 101 inside the experimental base, and an angle is also set between the exhaust hole 421 and the pressure stabilizing chamber 101, thereby forming a second directional turning section. By setting two angled structures, the airflow undergoes two consecutive turning paths before entering the pressure stabilizing chamber 101, which effectively extends the flow path, destroys the high-speed disturbance structure, and reduces flow velocity pulsation. This helps to establish a uniform and stable pressure field in the pressure stabilizing chamber 101, providing a more consistent intake airflow for the subsequent cyclone separator 60.

[0026] In other embodiments, the number of directional turning segments in the disturbance suppression path can be adjusted according to the stability of the intake air source, the requirements of airflow uniformity under test conditions, and the structural space of the device. When there are strong periodic pulsations in the external air supply system or large fluctuations in the air source pressure, three or more directional turning segments can be set in the intake path to further improve the rectification effect of the airflow before entering the pressure stabilizing chamber 101. This structure can be achieved by sequentially setting multiple angled connection points, so that the airflow turns multiple times in different directions before entering the pressure stabilizing chamber 101, extending the flow path and increasing the energy dissipation area in the physical path, thereby enhancing the disturbance suppression effect.

[0027] In one embodiment, to enhance the rectification effect of the disturbance suppression path, a first directional turning section and a second directional turning section are included. The included angle of both turning sections is designed to be 90°, meaning that the airflow changes vertically at each turning point. First, compared to acute or obtuse angle turning points, 90° turning points can achieve a more significant change in flow direction within a limited structural space, effectively disrupting the original flow inertia structure of the airflow, causing strong directional deflection and turbulent diffusion of high-speed air masses, which helps to weaken pulsations and balance the velocity gradient. Second, the 90° angle structure is simple to manufacture and has high assembly precision, and can be easily implemented using common structures such as standard pipe fittings and right-angle elbows, greatly improving the repeatability and maintainability of the device. In addition, the double 90° turning design has the advantage of symmetry. The first turning section unifies the multiple radially converging airflows into longitudinal flow, while the second turning section converts the longitudinal airflow into the stabilizing chamber 101 laterally, thereby forming an "S-shaped" or "L-shaped" disturbance dissipation trajectory on the flow path. This layout maximizes the path length of airflow in a limited space while avoiding the shock waves, eddies, or sound waves that are common in straight-through channels.

[0028] Reference Figure 4 In one embodiment, to ensure efficient convergence and uniform distribution of external air after entering the air inlet connector 41, multiple air inlets 411 are provided inside the air inlet connector 41, and the air inlets 411 are radially distributed around the center line of the exhaust port 421. The multiple air inlets 411 introduce gas into the air inlet connector 41 from different circumferential directions, achieving symmetrical convergence at the inlet of the exhaust port 421. This effectively avoids the problems of flow deviation, vortex, or local high flow velocity that may be caused by unilateral air supply, ensuring the symmetry of the flow field of the incoming airflow. At the same time, the radial arrangement of the air inlets 411 allows for multi-angle and multi-directional air supply pipeline connections outside the air inlet connector 41, improving the installation adaptability of the overall device and making it suitable for space-constrained or multi-source air supply scenarios.

[0029] To further optimize the airflow convergence characteristics in the intake path, the multiple intake holes 411 on the intake connector 41 are not only radially distributed but also uniformly arranged along the circumference of the intake connector 41. That is, each intake hole 411 is symmetrically distributed with respect to the central axis of the exhaust hole 421, and the included angle between adjacent intake holes 411 is consistent. This structure ensures that airflows introduced from different directions converge synchronously within the connector cavity, and the airflow tends to be balanced at the geometric center, forming a symmetrical and stable pre-flow field. For example, in a configuration with three intake holes 411, the included angle between any two adjacent intake holes 411 is 120°; if four intake holes 411 are used, the included angle is 90°; in a six-hole configuration, it is 60°, and so on. The consistent angle arrangement can effectively avoid intake flow deviation or the generation of local high-velocity jets, maintaining the flow stability of the convergence area within the intake connector 41.

[0030] Reference Figure 5 and Figure 6 In one embodiment, the experimental stand consists of a base 20 and a cylindrical body 10, which are connected by threads to form an assembly. The cylindrical body 10 has external threads 12 on its exterior, and the base 20 has corresponding internal threads 24 on its inner wall. The two are screwed together to form a detachable connection. For ease of operation, the end of the cylindrical body 10 away from the base 20 has a hexagonal head 15 structure, which allows the cylindrical body 10 to be screwed into the base 20 by applying force with a tool, achieving quick tightening.

[0031] During assembly, the hydrocyclone 60 is first installed in the hydrocyclone mounting hole 22 of the base 20. A hydrocyclone clamping ring 30 is installed above the hydrocyclone 60 to fix the hydrocyclone 60 in the base 20. After the cylinder 10 is screwed into the base 20 through the external thread 12 and tightened to the designated position, the flat surface of the lower end face of the cylinder 10 presses against the upper end face 31 of the hydrocyclone clamping ring 30, and the bottom surface 34 of the hydrocyclone clamping ring 30 is in close contact with the support plane 23 of the base 20, forming a stable double-sided clamping structure. This structure not only ensures that the hydrocyclone 60 does not move axially during operation, but also effectively improves the sealing performance of the device.

[0032] To further enhance the positioning accuracy of the hydrocyclone 60 in the radial and rotational directions, the hydrocyclone pressure ring 30 presses the hydrocyclone 60 tightly through the pressing surface 33, and positions it by engaging with the corresponding boss on the hydrocyclone 60 through the positioning boss 32. The positioning boss 32 and the corresponding positioning groove or engaging boss on the hydrocyclone 60 achieve nested engagement, so that the hydrocyclone pressure ring 30 is clamped between the base 20 and the cylinder 10, preventing the hydrocyclone 60 from rotating or shifting during the test due to airflow disturbance or installation error.

[0033] In this embodiment, the fuel nozzle 70 is installed on the side wall of the cylinder 10, specifically within a pre-set nozzle mounting seat 11. The nozzle mounting seat 11 and the cylinder 10 are integrally machined to ensure a precise alignment between the nozzle orifice and the cyclone separator 60. To ensure a stable and consistent depth of nozzle insertion into the cyclone separator 60, the end face of the cylinder 10 and the upper end face 31 of the cyclone separator pressure ring 30 are fitted together during assembly, forming a clear structural positioning reference.

[0034] During assembly, the cylinder 10 is screwed into the base 20 via threads. As the threads gradually tighten, the end face of the cylinder 10 presses against the upper end face 31 of the hydrocyclone pressure ring 30 until a contact is formed. This contact surface not only achieves the clamping of the hydrocyclone pressure ring 30 and the stable clamping of the hydrocyclone 60, but also serves to limit the assembly depth. That is, the screwing depth of the cylinder 10 is determined by the contact position between its end face and the upper end face 31 of the pressure ring, thus ensuring that the position of the cylinder 10 remains consistent during each assembly. Since the nozzle mounting seat 11 is a fixed structure on the cylinder 10, its height relative to the lower end face of the cylinder 10 is constant. Therefore, by controlling the depth of the cylinder 10 screwed into the base 20, the axial distance of the fuel nozzle 70 nozzle orifice relative to the hydrocyclone 60 is indirectly controlled. The depth of the nozzle insertion into the hydrocyclone 60 is determined by this relative position, enabling high repeatability and precision in installation positioning. This structural design avoids relying on manual measurement of insertion depth or additional limiting mechanisms, significantly improving the consistency of spray position and the repeatability of the oil mist field during the test.

[0035] In this embodiment, a ring-shaped mounting flange is provided at the lower part of the base 20 of the experimental stand to fix the entire combined atomization test device to the test platform. Several mounting holes 21 are evenly distributed on the mounting flange, allowing for mechanical connection to the test platform via bolts or screws, thus achieving stable installation and precise positioning of the device.

[0036] Reference Figure 1In one embodiment, to further optimize the diffusion effect of airflow after entering the pressure stabilizing chamber 101 from the exhaust port 421, the height of the centerline of the exhaust port 421 relative to the base 20 is set to H, and the inner diameter of the pressure stabilizing chamber 101 is D, satisfying the parameter relationship: 2D < H < 3D. This height setting scheme is based on a comprehensive trade-off between the airflow diffusion path, the volume of the pressure stabilizing chamber 101, and the airflow uniformity.

[0037] Specifically, after the airflow undergoes two directional turning points, it enters the pressure-stabilizing chamber 101 through the exhaust port 421. If H is too small, meaning the exhaust port 421 is too close to the cyclone separator 60, the airflow will directly enter the gas channel of the cyclone separator 60 without sufficient diffusion. This may lead to excessively high local airflow velocity and concentrated direction, resulting in phenomena such as jetting and turbulence, affecting the atomization effect. Conversely, if H is set too large, the volume of the pressure-stabilizing chamber 101 increases. Although this can further mitigate airflow disturbance, it will lead to a lengthy structure, delayed response, and an increased overall size of the device. Through experimental verification and flow simulation analysis, H is optimally set between 2 and 3 times the diameter D of the pressure-stabilizing chamber 101, balancing sufficient airflow diffusion with structural compactness. Within this range, the airflow space above the exhaust port 421 is sufficient to form a stable buffer zone, allowing the gas to achieve a high degree of velocity uniformity and pressure consistency before entering the cyclone separator 60, which is beneficial for forming a symmetrical and stable oil mist field.

[0038] To minimize spatial interference during the atomization and spraying process, the distance between the outlet end of the gas channel of the cyclone separator 60 and the lower end face of the base 20 is limited in the device structure. Specifically, a gap S is provided between the outlet end face of the gas channel of the cyclone separator 60 and the lower end face of the base 20, and it is made to meet the parameter range: 0.5mm < S < 1mm.

[0039] The setting of this gap has several important functions: First, the outlet end face of the cyclone separator 60 is the starting point for spray formation, and the spatial boundary conditions between the atomized oil and gas ejected and the surrounding environment directly affect the expansion morphology and symmetry of the oil mist field. If the outlet end is too close to the lower end face of the base 20, i.e., S is too small, the spray will be affected by reflection, interference, or flow field contraction of the base 20 structure, resulting in flow deviation, backflow, or local enrichment of the oil mist field, thus affecting the accuracy of experimental observation and data acquisition. On the other hand, if S is set too large, it may cause the spray to diffuse too quickly, with unclear boundaries, increasing the uncertainty of the experimental space and reducing the structural compactness.

[0040] In one embodiment, to achieve real-time monitoring and control of the airflow pressure state inside the pressure stabilizing chamber 101, a static pressure seat mounting hole 16 is provided at the end of the cylinder 10 away from the base 20, and a static pressure measuring seat 50 is installed in the static pressure seat mounting hole 16. The static pressure measuring seat 50 is fixedly connected to the cylinder 10 by welding, threading, or interference fit to ensure structural strength and airtightness. The static pressure measuring seat 50 has a pressure measuring hole 13 inside that communicates with the pressure stabilizing chamber 101, used to guide the gas pressure inside the chamber to the measuring interface.

[0041] The pressure measuring port 13 penetrates the static pressure measuring base 50 and has an external connection port for connecting to an external pressure sensor or digital pressure gauge, thereby enabling accurate measurement of the static pressure inside the pressure stabilizing chamber 101. The acquired static pressure data can be used to evaluate the effectiveness of reducing inlet path disturbances, determine the stability of the cyclone separator 60's inlet state, and also for closed-loop control or dynamic adjustment of spray pressure conditions. This static pressure measurement structure is located at the upper end of the cylinder 10, away from the airflow inlet and cyclone separator 60 outlet areas, avoiding interference from high-speed flow regions on the pressure measurement results, while ensuring that the measured data reflects the overall average pressure level of the pressure stabilizing chamber 101. The size and orientation of the pressure measuring port 13 can be optimized as needed to ensure sensitive pressure response, high measurement accuracy, and no introduction of new disturbance sources.

[0042] Reference Figure 7In one embodiment, the hydrocyclone clamping ring 30 not only clamps the hydrocyclone 60 axially in the experimental base but also guides airflow into the hydrocyclone 60. Specifically, the hydrocyclone clamping ring 30 has four air inlet channels 301, which are evenly distributed circumferentially to guide airflow from the pressure stabilizing chamber 101 into the air inlet channels 301 of the hydrocyclone 60. The air inlet channels 301 are arranged symmetrically in a circle, spaced 90 degrees apart, forming an equidistant arrangement. The advantage of this structural design is that it can supply airflow to the hydrocyclone 60 from multiple directions, avoiding the problem of airflow concentration on one side leading to airflow deviation or uneven swirling, thereby ensuring that the rotating airflow field formed in the hydrocyclone 60 is symmetrical and stable. Each air inlet channel 301 penetrates the thickness of the hydrocyclone clamping ring 30 and is directly connected to the air inlet of the hydrocyclone 60 below it, so that the stable airflow in the pressure stabilizing chamber 101 can be evenly distributed to the inlet of the hydrocyclone 60. During the experiment, the cyclone separator 60 generates a high-speed rotating airflow using this annular air intake method, which, after atomizing the fuel injected by the nozzle, forms a stable oil mist field. The principle of this scheme is as follows: Based on precise control of the relative position of the fuel nozzle 70 and the cyclone separator 60, the airflow path structure is optimized to effectively reduce intake disturbances and ensure a stable airflow supply, thereby improving the realism and data reliability of the combined atomization test. Specifically, the device introduces an external air source through the intake seat 40 and sets up a disturbance suppression path with two 90° angles, causing the airflow to undergo two directional changes before entering the pressure stabilizing chamber 101, significantly reducing flow velocity fluctuations and pulsation interference. After further diffusion and homogenization in the pressure stabilizing chamber 101, the airflow enters the cyclone separator 60 through four circumferentially distributed channels, forming a stable and symmetrical swirling air field. The fuel injector is inserted into the cyclone separator 60, and the insertion depth is precisely controlled by structural limits, allowing the fuel atomized particles to fully couple with the stable swirling airflow to form an oil mist field. Meanwhile, the cylinder 10 and the base 20 are connected by threads, and the end face is pressed to tighten the cyclone separator pressure ring 30 to ensure assembly accuracy and sealing. In conjunction with the static pressure measuring structure located on the top of the cylinder 10, real-time monitoring of the air intake status can be achieved. The overall structure is synergistically optimized in terms of pneumatics, assembly, positioning and test data control, achieving highly repeatable and consistent spray characteristic tests.

[0043] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A combined atomization test device, characterized by, include: The experimental stand has a pressure stabilizing chamber (101); A hydrocyclone (60) is provided on the experimental stand, and the hydrocyclone (60) is provided with a gas channel communicating with the pressure stabilizing chamber (101); A fuel nozzle (70) is set on the experimental stand. The fuel nozzle (70) has an injection port corresponding to the cyclone separator (60) for injecting atomized fuel, so that the atomized fuel and the gas flow at the outlet of the gas channel of the cyclone separator (60) combine to form an oil mist field. The air intake seat (40) is connected to the pressure stabilizing chamber (101) of the test seat. A disturbance suppression path is formed between the air intake seat (40) and the test seat. The disturbance suppression path includes at least two directional turning segments for weakening airflow disturbance.

2. The combined atomization test apparatus according to claim 1, characterized in that: The air intake seat (40) includes an air intake connector (41) and an exhaust pipe (42). The air intake connector (41) is provided with an air intake hole (411) for connecting to an external air source, and the exhaust pipe (42) is provided with an exhaust hole (421) that connects the air intake hole (411) and the pressure stabilizing chamber (101). The air inlet (411) and the exhaust port (421) are set at an angle to form a first direction turning section; the exhaust port (421) and the pressure stabilizing chamber (101) are set at an angle to form a second direction turning section.

3. The combined atomization test apparatus according to claim 2, characterized in that: The angle between the first and second directional turning segments is 90°.

4. The combined atomization test apparatus according to claim 3, characterized in that: The air inlet connector (41) is provided with multiple air inlets (411), which are radially distributed with the center line of the exhaust port (421) as the center.

5. The combined atomization test apparatus according to claim 4, characterized in that: The air inlets (411) on the air inlet connector (41) are evenly distributed so that the included angle between adjacent air inlets (411) is consistent.

6. The combined atomization test apparatus according to claim 1, characterized in that: The experimental stand includes a base (20) and a cylinder (10) connected by threads. A hydrocyclone (60) is mounted on the base (20). A hydrocyclone clamping ring (30) is provided on the side of the hydrocyclone (60) away from the base (20). The hydrocyclone clamping ring (30) is clamped between the base (20) and the cylinder (10) and is used to press the hydrocyclone (60) onto the base (20).

7. The combined atomization test apparatus according to claim 6, characterized in that: The fuel nozzle (70) is installed on the side wall of the cylinder (10) and is bent so that its injection port faces the cyclone (60). The end face of the cylinder (10) is in contact with the upper end face (31) of the cyclone pressure ring (30) to limit the relative position of the fuel nozzle (70) and the cyclone (60).

8. The combined atomization test apparatus according to claim 7, characterized in that: The centerline of the exhaust port (421) is at a height of H from the base (20), and the diameter of the pressure stabilizing chamber (101) is D, satisfying 2D. <H<3D。 9. The combined atomization test apparatus according to claim 8, characterized in that: A static pressure measuring seat (50) is provided at one end of the cylinder (10) away from the base (20), and a pressure measuring hole (13) communicating with the pressure stabilizing chamber (101) is provided on the static pressure measuring seat (50).

10. The combined atomization test apparatus according to claim 1, characterized in that: The distance between the outlet end face of the gas passage of the cyclone separator (60) and the lower end face of the base (20) is S, and satisfies 0.5mm. <S<1mm。

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