System for testing spray cone angle of nozzle in different oil supply temperature states

Abstract

The invention discloses a nozzle spray cone angle test system in different oil supply temperature states, which comprises a test measurement device, a control device and a control device, wherein the test measurement device is used for testing spray cone angles of a single spray nozzle and a single spray nozzle with a fuel header pipe at different fuel temperatures; and the test system has a function of performing complementary verification by manually acquiring nozzle spray cone angle data and photographing nozzle spray cone angle data by an optical camera. The nozzle spraying cone angle data obtained by manually operating the complementary verification measurement device and the nozzle spraying cone angle data obtained by shooting the optical camera are subjected to complementary verification, and the problem that the measurement data complementary verification of the nozzle spraying cone angle cannot be realized as only the camera is adopted to shoot the nozzle spraying cone angle is solved.

Description

Technical Field

[0001] The present invention relates to a nozzle spray cone angle test system under different fuel supply temperature conditions, belonging to the technical field of aero-engine tests. Background Art

[0002] The fuel nozzle is a key component of an aero-engine and plays an important role in determining the performance of the aero-engine. For the engine combustion chamber, the spray cone angle of the nozzle has a great influence on combustion chamber ignition, flame linking, liquid spray evaporation, fuel concentration distribution, etc. In the development of aero-engines, improving the design level of the nozzle and improving the atomization quality of the nozzle are one of the key technologies. Therefore, the importance of nozzle design and experimental research is becoming more and more prominent. Moreover, the fuel nozzle belongs to a precision part. Simply relying on theoretical design cannot guarantee the design performance, and it needs to be optimized and adjusted through continuous experiments to meet the requirements of engine development.

[0003] The prior art (see Chinese Patent Publication No. CN206020009U) only uses a camera to photograph the spray cone angle of the nozzle and cannot realize the complementary verification of the measurement data of the spray cone angle of the nozzle. Summary of the Invention

[0004] To solve the above technical problems, the present invention provides a nozzle spray cone angle test system under different fuel supply temperature conditions.

[0005] The present invention is achieved through the following technical solutions.

[0006] A nozzle spray cone angle test system under different fuel supply temperature conditions provided by the present invention includes:

[0007] An experimental system that realizes the experimental measurement and research on the spray cone angle of a single spray nozzle and a single nozzle with a fuel manifold under different fuel temperatures, and has the function of complementary verification of manually obtaining the nozzle spray cone angle data and the nozzle spray cone angle data taken by an optical camera.

[0008] The experimental system includes a test chamber, and there is a test piece tooling for installing a single nozzle or a nozzle with a fuel manifold on the test chamber;

[0009] A fuel subsystem that provides fuel with different oil temperatures, and the fuel subsystem is connected to a single nozzle or a nozzle with a fuel manifold.

[0010] The fuel subsystem includes a fuel tank for containing fuel, and a filter and a valve are installed at the outlet of the fuel tank;

[0011] The outlet of the fuel tank is connected in parallel with an adjustable air film control valve A, an adjustable air film control valve B, a variable frequency oil pump A, and a variable frequency oil pump B; the adjustable air film control valve A and the variable frequency oil pump A are a group, and the adjustable air film control valve B and the variable frequency oil pump B are a group;

[0012] The outlets of the regulating air film control valve A, regulating air film control valve B, variable-frequency oil pump A, and variable-frequency oil pump B are connected to a heat exchanger; the heat exchange port of the heat exchanger is connected to a fuel heating and cooling device through a heat-conducting oil pipe, and the fuel heating and cooling device heats the fuel to change the fuel temperature; the oil discharge outlet of the heat exchanger is connected in parallel to the test chamber through a main oil circuit and a secondary oil circuit in parallel, and is used to connect to a nozzle or a fuel manifold with a nozzle.

[0013] The bottom of the test chamber is connected to the oil tank return port through an oil pump.

[0014] The test chamber mainly consists of an atomization darkroom, an optical camera installation room, adjustable-brightness supplementary lights, a cylinder body, an adjustable blower, an oil mist separator, a manual cone angle measuring ruler, a rectifying net, and a test piece tooling.

[0015] The test piece tooling is installed at a position facing the center of the cylinder body; the inner wall surface of the atomization darkroom adopts a blackening process and is coated with an oil-repellent layer, and six adjustable-brightness supplementary lights are evenly distributed.

[0016] An optical camera of the fog cone optical analysis system is installed in the optical camera installation room; at the same time, there is a tempered glass coated with an oil-repellent layer at the front end of the optical camera in the optical camera installation room.

[0017] A rectifying net is arranged below the atomization darkroom.

[0018] An adjustable blower with a built-in oil and gas separator is installed in the test chamber. The adjustable blower sucks the oil mist, and the fuel flows to the bottom of the test chamber and returns to the oil tank through the return oil circuit.

[0019] A complementary verification measurement device for manual operation is fixedly connected to the upper section of the test chamber.

[0020] The complementary verification measurement device includes a knife-edge ruler piece, a fixed bracket, a slider, a transmission rod, a bearing seat, a knife ruler, a pointer, and a dial.

[0021] The fixed bracket is fixedly connected to the test piece tooling and the upper section of the test chamber; the slider is fixed to the bottom surface of the fixed bracket, and the transmission rod can slide and rotate through the slider; the end of the transmission rod away from the slider can slide and rotate through and install the bearing seat, and the bearing seat is in a fixed state.

[0022] The dial is fixed to the bottom surface of the fixed bracket, a pointer is fixed on the transmission rod, the transmission rod penetrates through the dial, and the pointer contacts the dial.

[0023] The knife ruler is fixed to the end of the transmission rod, and the knife-edge ruler piece is controllably slidably installed on the knife ruler through a knob screw.

[0024] The beneficial effects of the present invention are as follows: The fuel heating and cooling device heats the fuel to change the fuel temperature; the operator operates the complementary verification measurement device to obtain the nozzle spray cone angle data, and then performs complementary verification with the nozzle spray cone angle data obtained by the optical camera, solving the problem that only using the camera to photograph the nozzle spray cone angle cannot achieve complementary verification of the measurement data of the nozzle spray cone angle. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is the distribution schematic diagram of the present invention;

[0026] Figure 2 is the front view distribution schematic diagram of the test chamber of the present invention;

[0027] Figure 3 is the top view distribution schematic diagram of the test chamber of the present invention;

[0028] Figure 4 is the front view distribution schematic diagram of the complementary verification measurement device of the present invention;

[0029] Figure 5 is the software processing interface diagram of the fog cone optical analysis system obtained by the test of the present invention;

[0030] In the figure: 1 - fuel tank; 3 - fuel heating and cooling device; 4 - regulating air film control valve A; 5 - variable frequency oil pump A; 6 - regulating air film control valve B; 7 - variable frequency oil pump B; 8 - oil pump; 9 - heat exchanger; 10 - test chamber; 11 - fog cone optical analysis system;

[0031] 12 - atomization darkroom; 13 - optical camera installation room; 14 - adjustable brightness supplementary light; 15 - cylinder body; 16 - adjustable fan; 17 - oil mist separator; 18 - manual cone angle measuring ruler; 19 - rectifying net; 20 - test piece tooling;

[0032] 21 - knife ruler piece; 22 - fixed bracket; 23 - slider; 24 - transmission rod; 25 - bearing seat; 26 - knife ruler; 27 - pointer; 28 - scale disk. DETAILED DESCRIPTION OF THE INVENTION

[0033] The technical solution of the present invention will be further described below, but the scope of protection is not limited thereto.

[0034] As Figures 1 to 5 shown.

[0035] A nozzle spray cone angle test system under different fuel supply temperature states of the present application includes:

[0036] A test chamber 10, on which a test piece tooling 20 is installed, and the test piece tooling 20 is installed with a single nozzle or a fuel manifold with a nozzle.

[0037] A fuel subsystem that supplies fuel with different oil temperatures to the nozzle, and the fuel subsystem is connected to the nozzle or the fuel manifold with a nozzle.

[0038] The fuel subsystem includes a fuel tank 1 that houses fuel, and a filter and a valve are installed at the outlet of the fuel tank 1;

[0039] The outlet of the fuel tank 1 is connected in parallel with an adjustable air film control valve A4, an adjustable air film control valve B6, a variable frequency oil pump A5, and a variable frequency oil pump B7; the adjustable air film control valve A4 and the variable frequency oil pump A5 are a group, and the adjustable air film control valve B6 and the variable frequency oil pump B7 are a group.

[0040] Valves are installed at the outlets of the adjustable air film control valve A4, the adjustable air film control valve B6, the variable frequency oil pump A5, and the variable frequency oil pump B7, and mass flow meters are installed at the inlets of the adjustable air film control valve A4, the adjustable air film control valve B6, the variable frequency oil pump A5, and the variable frequency oil pump B7; the outlets of the adjustable air film control valve A4, the adjustable air film control valve B6, the variable frequency oil pump A5, and the variable frequency oil pump B7 are connected to a heat exchanger 9.

[0041] The heat exchange port of the heat exchanger 9 is connected to a fuel heating and cooling device 3 through a heat conduction oil pipe, and the fuel heating and cooling device 3 heats the fuel to change the fuel temperature; the oil discharge outlet of the heat exchanger 9 is connected in parallel and extends to the test chamber 10 through a main oil path and a secondary oil path in parallel, and is used to be connected to the nozzle or the fuel manifold with a nozzle. Both the main oil path and the secondary oil path are connected to the fuel tank 1 through oil pipes.

[0042] The oil return port of the fuel tank 1 is connected to the bottom of the test chamber 10 through an oil pump 8 to form an oil return path; the fuel sprayed by the nozzle can be pumped back into the fuel tank 1 through the oil pump 8 at the bottom of the test chamber 10.

[0043] The test chamber 10 mainly consists of an atomization darkroom 12, an optical camera installation room 13, an adjustable brightness fill light 14, a cylinder 15, an adjustable fan 16, an oil mist separator 17, a manual cone angle measuring ruler 18, a rectifying net 19, and a test piece tooling 20.

[0044] At the installation position of the test piece tooling 20 facing the center of the cylinder 15, a single nozzle can also be installed to carry out atomization tests.

[0045] The inner wall surface of the atomization darkroom 12 adopts a blackening process and is coated with an oil-repellent layer. At the same time, six adjustable brightness fill lights 14 are evenly distributed, and the fill lights 14 are used to supplement light for the fog cone during the test.

[0046] The optical camera installation room 13 is equipped with an optical camera of a fog cone optical analysis system 11; at the same time, the optical camera installation room 13 at the front end of the optical camera uses tempered glass coated with an oil-repellent layer to physically isolate the camera from the oil mist, and the oil-repellent layer is used to prevent the oil mist from adhering to the outer wall surface of the glass.

[0047] Considering the oil mist accumulation in the atomizing darkroom 12 during the test, a rectifying net 19 is arranged below the atomizing darkroom for primary oil mist separation and suction airflow rectification.

[0048] The test cabin 10 is equipped with an adjustable fan 16 with an oil-gas separator 17. The adjustable fan 16 sucks the oil mist, and the fuel flows to the bottom of the test cabin 10 and returns to the fuel tank through the oil return line to ensure that the fog cone photos taken by the optical camera are not interfered by the oil mist and thus affect the fog cone measurement results; the pictures taken by the optical camera are transmitted to the computer to calculate the fog cone angle through the software provided by the fog cone optical analysis system; the optical camera continuously takes multiple fog cone photos or records spray videos. If the fog cone photos or video screenshots cannot clearly show the outline of the fog cone, the light brightness can be adjusted through the adjustable brightness fill light 14 to improve the picture quality.

[0049] A complementary verification measuring device for manual operation is fixedly connected to the upper section of the test chamber 10. The nozzle spray cone angle data obtained by manual operation of the complementary verification measuring device is used for complementary verification with the nozzle spray cone angle data obtained by the optical camera, which solves the problem that the nozzle spray cone angle measurement data cannot be complementary verified by only using the camera to shoot the nozzle spray cone angle.

[0050] The complementary verification measuring device comprises a knife ruler piece 21, a fixed bracket 22, a slide block 23, a transmission rod 24, a bearing seat 25, a knife ruler 26, a pointer 27, and a dial 28.

[0051] The fixed bracket 22 is connected and fixed to the test piece tooling 20 and the upper section of the test chamber 10; the slider 23 is fixed to the bottom surface of the fixed bracket 22, and the transmission rod 24 can slide and rotate through the slider 23; the end of the transmission rod 24 away from the slider 23 can slide and rotate through the installation bearing seat 25, and the bearing seat 25 is in a fixed state.

[0052] The dial 28 is fixed to the bottom surface of the fixed bracket 22, and a pointer 27 is fixed to the transmission rod 24. The transmission rod 24 passes through the dial 28, and the pointer 27 contacts the dial 28. When the transmission rod 24 rotates with the pointer 27, the pointer 27 can manually read the changing cone angle range data indicated by the pointer 27 on the dial 28.

[0053] The ruler 26 is fixed to the end of the transmission rod 24, and the ruler piece 21 is controllably slidably mounted on the ruler 26 by means of a knob screw. The ruler piece 21 slides on the ruler 26 to correspond to different heights of the spray cone angle of the nozzle. The transmission rod 24 with the ruler piece 21 can measure the spray cone angle range tangent to the spray edge line.

Claims

1. A nozzle spray cone angle test system under different fuel supply temperature conditions, characterized in that, Including: An experimental system that realizes the experimental measurement and research on the spray cone angle of a single injection nozzle and a single nozzle with a fuel manifold at different fuel temperatures, and has the function of complementary verification by manually obtaining the nozzle spray cone angle data and taking the nozzle spray cone angle data with an optical camera.

2. The nozzle spray cone angle test system under different fuel supply temperature states according to claim 1, wherein: The experimental system includes an experimental chamber (10), and there is a test piece tooling (20) for installing a single nozzle or a fuel manifold with a nozzle on the experimental chamber (10); A fuel subsystem that provides fuel at different oil temperatures, and the fuel subsystem is connected to a single nozzle or a fuel manifold with a nozzle.

3. The nozzle spray cone angle test system under different fuel supply temperature states according to claim 2, wherein: The fuel subsystem includes a fuel tank (1) for containing fuel, and a filter and a valve are installed at the outlet of the fuel tank (1); The outlet of the fuel tank (1) is connected in parallel with an adjustable air film control valve A (4), an adjustable air film control valve B (6), a variable frequency oil pump A (5), and a variable frequency oil pump B (7); the adjustable air film control valve A (4) and the variable frequency oil pump A (5) are a group, and the adjustable air film control valve B (6) and the variable frequency oil pump B (7) are a group; The outlets of the adjustable air film control valve A (4), the adjustable air film control valve B (6), the variable frequency oil pump A (5), and the variable frequency oil pump B (7) are connected to a heat exchanger (9); the heat exchange port of the heat exchanger (9) is connected to a fuel heating and cooling device (3) through a heat conduction oil pipe, and the fuel heating and cooling device (3) heats the fuel to change the fuel temperature; the oil discharge outlet of the heat exchanger (9) is connected in parallel and extends to the experimental chamber (10) through a main oil circuit and a secondary oil circuit for connecting to a nozzle or a fuel manifold with a nozzle; The bottom of the experimental chamber (10) is connected to the oil return port of the fuel tank (1) through an oil pump (8).

4. The nozzle spray cone angle test system under different fuel supply temperature states according to claim 3, wherein: The experimental chamber (10) mainly consists of an atomization darkroom (12), an optical camera installation room (13), an adjustable brightness supplementary light (14), a cylinder body (15), an adjustable fan (16), an oil mist separator (17), a manual cone angle measuring ruler (18), a rectifying net (19), and a test piece tooling (20).

5. The nozzle spray cone angle test system under different fuel supply temperature states according to claim 4, wherein: The experimental chamber (10) mainly consists of an atomization darkroom (12), an optical camera installation room (13), an adjustable brightness supplementary light (14), a cylinder body (15), an adjustable fan (16), an oil mist separator (17), a manual cone angle measuring ruler (18), a rectifying net (19), and a test piece tooling (20). The installation position of the test piece tooling (20) is opposite to the center of the cylinder body (15); the inner wall surface of the atomization darkroom (12) adopts a blackening process and is coated with an oil-repellent layer, and six adjustable brightness supplementary lights (14) are evenly distributed; An optical camera of a fog cone optical analysis system (11) is installed in the optical camera installation room (13); there is tempered glass with an oil-repellent layer at the front end of the optical camera in the optical camera installation room (13); A rectifying net (19) is arranged below the atomization darkroom.

6. The nozzle spray cone angle test system under different fuel supply temperature states according to claim 5, characterized in that: An adjustable fan (16) with a built-in oil and gas separator (17) is installed in the experimental chamber (10), and the adjustable fan (16) sucks the oil mist, and the fuel flows to the bottom of the experimental chamber (10) and returns to the fuel tank through the oil return circuit.

7. The nozzle spray cone angle test system under different fuel supply temperature states according to claim 2 or 3, characterized in that: A complementary verification measurement device for manual operation is fixedly connected to the upper section of the experimental chamber (10).

8. The nozzle spray cone angle test system under different fuel supply temperature states according to claim 7, wherein: The complementary verification measuring device includes a knife-edge piece (21), a fixed bracket (22), a slider (23), a transmission rod (24), a bearing seat (25), a knife-edge ruler (26), a pointer (27), and a dial (28).

9. The nozzle spray cone angle test system under different fuel supply temperature states according to claim 8, characterized in that: The fixed bracket (22) is fixedly connected to the test piece tooling (20) and the upper section of the test chamber (10); the slider (23) is fixed to the bottom surface of the fixed bracket (22), and the transmission rod (24) is slidably and rotatably penetrated through the slider (23); the end of the transmission rod (24) away from the slider (23) is slidably and rotatably penetrated through and installed in the bearing seat (25), and the bearing seat (25) is in a fixed state; The dial (28) is fixed to the bottom surface of the fixed bracket (22), the pointer (27) is fixed on the transmission rod (24), the transmission rod (24) penetrates through the dial (28), and the pointer (27) contacts the dial (28); The knife-edge ruler (26) is fixed to the end of the transmission rod (24), and the knife-edge piece (21) is controllably slidably installed on the knife-edge ruler (26) through a knob screw.

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