Gas-liquid coupling nozzle performance test system and method

Abstract

The invention relates to the technical field of nozzle performance testing, in particular to a gas-liquid coupling nozzle performance testing system and method. The test system comprises a fuel system, an air system, a vacuum test chamber and a parameter acquisition module. The fuel oil system is used for providing fuel oil with adjustable temperature and flow for the test piece; the air system is used for providing dry air with adjustable temperature and flow for the test piece; the vacuum test cabin is used for accommodating a test piece and adjusting the back pressure of an outlet of the test piece; and the parameter acquisition module is used for synchronously acquiring flow characteristic and atomization characteristic data. The experiment system can realize fuel oil heating and cooling adjustment and air heating and cooling adjustment at the same time, supports performance tests of a single-nozzle small-flow working condition and a gas-liquid coupling nozzle, and meets test requirements of different test pieces and different temperature-flow working conditions.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of nozzle performance test, in particular to a gas-liquid coupling nozzle performance test system and method. BACKGROUND

[0002] Fuel nozzle is a key component of aviation engines and other equipment, which forms a mixture by atomizing or vaporizing fuel to ensure stable combustion. The spray cone angle, flow characteristics, atomization characteristics and other parameters of the fuel nozzle under different temperature conditions (such as low temperature fuel and low temperature air) are the core indicators for evaluating ignition performance. Therefore, nozzle performance test is a necessary process for product quality assurance. At the same time, as a component that generates vortex to achieve uniform mixing with fuel and form an ignition source, the current integrated design and test of fuel nozzle and vortex finder have been widely applied in modern engines.

[0003] However, the existing nozzle test technology still has many deficiencies: For example, patent application CN117168817A discloses an aero-engine oil nozzle test system and method, which is mainly designed for flow test of oil nozzle and only has oil circulation and warming functions, without fuel warming and cooling functions, and cannot realize air temperature adjustment, which cannot meet the performance test requirements of fuel nozzle under different fuel and air temperature conditions.

[0004] For example, patent application CN114216672A discloses a nozzle atomization characteristic test system and method under air mixing state, which has fuel warming and cooling functions and air mixing system, but the air system can only adjust flow and pressure without air warming and cooling functions, and without air drying device, which cannot eliminate the influence of water in air, leading to icing problem of test piece under low temperature condition, affecting test accuracy.

[0005] The existing nozzle and vortex finder assembly atomization characteristic test is mostly carried out in non-restricted space (open), which cannot adjust the outlet back pressure of test piece, and is difficult to restore the working environment of nozzle and vortex finder in actual equipment, leading to large deviation between test data and actual working condition. SUMMARY

[0006] The present application aims to provide a gas-liquid coupling nozzle performance test system and method, which can realize accurate adjustment of different air temperature and fuel temperature conditions, meet the performance test requirements of single nozzle small flow condition and gas-liquid coupling nozzle, and realize vortex finder outlet back pressure adjustment through vacuum test cabin, avoid nozzle icing under low temperature condition, and ensure reliable test data.

[0007] To achieve the above object, in one aspect, the application provides a performance test system for a gas-liquid coupling nozzle, which comprises a fuel system, an air system, a vacuum test cabin and a parameter acquisition module; the fuel system is used to provide fuel with adjustable temperature and flow rate for a test piece; the air system is used to provide dry air with adjustable temperature and flow rate for the test piece; the vacuum test cabin is used to accommodate the test piece and adjust the outlet back pressure of the test piece; and the parameter acquisition module is used to synchronously acquire flow characteristic and atomization characteristic data.

[0008] Preferably, the fuel system comprises an oil storage tank, two parallel fuel pipelines arranged downstream of the oil storage tank, a fuel temperature increasing and decreasing device connected downstream of the two fuel pipelines, and two parallel test fuel supply branches arranged downstream of the fuel temperature increasing and decreasing device; the outlet ends of the test fuel supply branches are connected with the test piece in the vacuum test cabin; a main oil return pipeline is connected to the oil storage tank; the vacuum test cabin is connected with an oil-gas separator; the oil-gas separator is connected with the main oil return pipeline through a cooling oil return pipeline; an eighth hand valve and a cooler are sequentially arranged on the cooling oil return pipeline along the direction of oil flow; the oil-gas separator is connected with a silencer through a pipeline, and a tenth gas film valve is arranged on the pipeline; The air system comprises a vacuum pump set, a dryer, an air temperature increasing and decreasing pipeline and a mixing box; the vacuum pump set is connected with the vacuum test cabin; the dryer is arranged downstream of the air inlet end; the dryer is connected with the air temperature increasing and decreasing pipeline downstream; the air temperature increasing and decreasing pipeline is connected with the mixing box downstream; and the mixing box is connected with the vacuum test cabin downstream. The vacuum test cabin is provided with a fourth temperature measuring point, a sixth pressure measuring point and a gas discharge valve; the downstream of the gas discharge valve is connected to the silencer; the vacuum test cabin is circumferentially provided with an optical glass window, and an internal light source is arranged inside the vacuum test cabin. The parameter acquisition module comprises an industrial camera, a PDPA device, a PIV device and flow, pressure and temperature measuring points arranged on each pipeline.

[0009] Preferably, an oil filling port, a first oil filter, a first temperature measuring point, a breather valve, a vent valve, a liquid level meter and a nitrogen filling port are arranged on the oil storage tank; the oil filling port is communicated with the oil storage tank through the first oil filter; the first temperature measuring point is used to monitor the fuel temperature in the oil storage tank; the breather valve and the vent valve are used to stabilize the pressure of the oil storage tank; the liquid level meter is used for fuel volume measurement; the nitrogen filling port is used for supplementing nitrogen for fuel warming test; a pollution discharge port is arranged on the oil storage tank, and a fourteenth hand valve is arranged on the pollution discharge port.

[0010] Preferably, the fuel system comprises a main fuel supply line; the fuel pipeline comprises a first fuel pipeline and a second fuel pipeline; the test fuel supply branch comprises a first test fuel supply branch and a second test fuel supply branch; the main fuel supply line is connected to the oil outlet of the oil tank; the end of the main fuel supply line is connected with two branch pipes, one of which forms the first fuel pipeline and the other of which forms the second fuel pipeline; a first hand valve and a first oil pump are installed on the main fuel supply line in sequence; a second hand valve, a second oil pump, a first check valve, a second oil filter and a second mass flow meter are installed on the first fuel pipeline in sequence; a fifth hand valve, a third oil pump, a second check valve, a third oil filter and a third mass flow meter are installed on the second fuel pipeline in sequence; a fourth hand valve is installed on the first test fuel supply branch; a seventh hand valve is installed on the second test fuel supply branch; the first oil pump is used to provide pre-pump positive pressure for the second oil pump and the third oil pump, and the second oil pump and the third oil pump are both variable frequency oil pumps.

[0011] Preferably, a first pressure relief oil line is connected to the main fuel supply line, and a first gas film valve and a first safety valve are arranged in parallel on the first pressure relief oil line; the first pressure relief oil line is connected to the main oil return pipe, and the connection part of the first pressure relief oil line and the main fuel supply line is located on the downstream side of the first oil pump. A second pressure relief oil line is connected to the first fuel pipeline, and a second safety valve and a second gas film valve are arranged in parallel on the second pressure relief oil line; the second pressure relief oil line is connected to the main oil return pipe, and the connection part of the second pressure relief oil line and the first fuel pipeline is located on the downstream side of the second oil pump. A third pressure relief oil line is connected to the second fuel pipeline, and a third gas film valve and a third safety valve are arranged in parallel on the third pressure relief oil line; the third pressure relief oil line is connected to the main oil return pipe, and the connection part of the third pressure relief oil line and the second fuel pipeline is located on the downstream side of the third oil pump. A first adjusting oil line is connected to the first test fuel supply branch, and a first mass flow meter, a third hand valve and a fifth gas film valve are installed on the first adjusting oil line in sequence along the direction of oil flow; the outlet end of the first adjusting oil line is connected to the cooling oil return pipe. A second adjusting oil line is connected to the second test fuel supply branch, and a fourth mass flow meter, a sixth hand valve and a sixth gas film valve are installed on the second adjusting oil line in sequence along the direction of oil flow; the outlet end of the second adjusting oil line is connected to the cooling oil return pipe. The connection parts of the first adjusting oil line and the second adjusting oil line and the cooling oil return pipe are located between the eighth hand valve and the cooler.

[0012] Preferably, the fuel heating and cooling device uses silicone oil as the heat exchange medium, and the fuel heating and cooling range of the fuel heating and cooling device is -47-130℃.

[0013] Preferably, the air heating and cooling pipeline comprises an air heating branch, an air cooling branch and a normal-temperature air pipeline arranged in parallel. The ninth hand valve and the heater are arranged in sequence along the airflow direction on the air heating branch. The tenth hand valve and the air wave machine are arranged in sequence along the airflow direction on the air cooling branch. The eleventh hand valve and the eleventh air film valve are arranged in sequence along the airflow direction on the normal-temperature air pipeline. The inlet ends of the air heating branch, the air cooling branch and the normal-temperature air pipeline are connected in parallel and then connected with the dryer, and the outlet ends are connected in parallel and then connected with the mixing box.

[0014] Preferably, an electric gate valve is arranged on the pipeline between the dryer and the air source, a first pressure relief air pipe is connected between the electric gate valve and the dryer, a seventh air film valve is installed on the first pressure relief air pipe, and the first pressure relief air pipe is connected to the muffler.

[0015] Preferably, a ninth air film valve and an air inlet metering pipeline are installed in sequence on the pipeline between the mixing box and the vacuum test chamber, the air inlet metering pipeline comprises a first branch and a second branch arranged in parallel, a twelfth hand valve and a first air flow meter are connected in sequence on the first branch, a thirteenth hand valve and a second air flow meter are connected in sequence on the second branch, a second pressure relief air pipe is connected between the mixing box and the ninth air film valve, an eighth air film valve is installed on the second pressure relief air pipe, the second pressure relief air pipe is connected to the muffler, and a fourth air film valve is arranged on the pipeline between the vacuum pump group and the vacuum test chamber.

[0016] In the second aspect, the application further provides a performance test method of a gas-liquid coupling nozzle, which uses the test system and comprises the following steps. S1, system preparation: filling the oil storage tank with test oil, vacuumizing by the vacuum pump group to adjust the initial pressure of the vacuum test chamber, and starting the dryer; S2, fuel working condition adjustment: selecting single or double oil path oil supply, starting the fuel heating and cooling device, adjusting the fuel temperature and flow, and supplying oil to the test piece; S3, air working condition adjustment: starting the air heating and cooling pipeline according to the requirement, adjusting the air temperature and flow, and inputting into the test chamber; S4, back pressure adjustment: making the outlet back pressure of the test piece meet the standard; S5, parameter acquisition: collecting atomization characteristic data by the industrial camera, the PDPA equipment and the PIV equipment, and synchronously recording the flow, pressure and temperature data; S6, end of test: close all parts, clean up the system of residual medium.

[0017] By adopting the technical scheme, the application has the following beneficial effects: (1) wide working condition coverage: simultaneously realizing fuel temperature increase and air temperature increase adjustment, supporting single-nozzle small-flow working condition and gas-liquid coupled nozzle performance test, and meeting the test requirements of different test pieces and different temperature-flow working conditions.

[0018] (2) high test environment restoration degree: the test piece outlet back pressure can be accurately adjusted through the vacuum test cabin and the air along-path air film valve, the air inlet state of the nozzle and the vortex component in the actual equipment is restored to the maximum extent, and the test data deviation is reduced.

[0019] (3) strong low-temperature test reliability: the vacuum test cabin is designed, the fuel atomized by the nozzle does not directly contact the atmosphere, the air system is arranged with a dryer to remove air moisture, the whole system avoids the mixing of water in the fuel to the maximum extent, ensures that the nozzle test piece does not freeze in the low-temperature air environment, and ensures the reliability of the nozzle test data acquisition.

[0020] (4) comprehensive and synchronous data acquisition: the parameter acquisition module can synchronously acquire flow characteristic and atomization characteristic data, and provide complete data support for nozzle performance optimization.

[0021] (5) the fuel and air bypass position requirements of the test system can ensure that the fuel and air flow conditions are small, the oil tank does not need to be pre-cooled, and low enough fuel and air temperatures are obtained, the along-path loss is reduced to the maximum extent, and cost reduction and efficiency increase are realized.

[0022] (6) the test piece outlet of the prior art is designed as an open type, the back pressure is atmospheric pressure, and cannot be adjusted. The closed test cabin is designed in the application, the air film valve opening degree of the air release path and the air film valve opening degree along the air flow are jointly adjusted, the test piece back pressure in the test cabin can be adjusted, and the actual air inlet state of the nozzle and the vortex component is restored to the maximum extent. BRIEF DESCRIPTION OF DRAWINGS

[0023] In order to more clearly illustrate the technical schemes in the embodiments of the application or the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the application, and other drawings can be obtained by those skilled in the art without creative labor on the basis of the drawings shown.

[0024] Figure 1 The test system schematic diagram provided by the application.

[0025] BRIEF DESCRIPTION OF DRAWINGS: 1, oil storage tank; 2, first temperature measuring point; 3, oil filling port; 4, first oil filter; 5, nitrogen filling port; 6, breather valve; 7, emptying valve; 8, fourth oil filter; 9, third check valve; 10, cooler; 11, seventh pressure measuring point; 12, eighth temperature measuring point; 13, eighth hand valve; 14, oil gas separator; 15, tenth gas film valve; 16, muffler; 17, vacuum pump group; 18, ninth temperature measuring point; 19, fourth gas film valve; 20, second temperature measuring point; 21, fourth pressure measuring point; 22, first mass flowmeter; 23, third hand valve; 24, fifth gas film valve; 25, tenth temperature measuring point; 26, eighth pressure measuring point; 27, first accumulator; 28, second mass flowmeter; 29, second oil filter; 30, first check valve; 31, sixth temperature measuring point; 32, second pressure measuring point; 33, second safety valve; 34, second gas film valve; 35, liquid level meter; 36, fourteenth hand valve; 37, first hand valve; 38, ninth pressure measuring point; 39, eleventh temperature measuring point; 40, first gas film valve; 41, first safety valve; 42, first oil pump; 43, first pressure measuring point; 44, fifth temperature measuring point; 45, second hand valve; 46, second oil pump; 47, third gas film valve; 48, third pressure measuring point; 49, seventh temperature measuring point; 50, second check valve; 51, third oil filter; 52, third mass flowmeter; 53, tenth pressure measuring point; 54, twelfth temperature measuring point; 55, sixth hand valve; 56, sixth gas film valve; 57, fourth hand valve; 58, fourth temperature measuring point; 59, sixth pressure measuring point; 60, air release valve; 61, vacuum test chamber; 62, third temperature measuring point; 63, fifth pressure measuring point; 64, seventh hand valve; 65, fourth mass flowmeter; 66, fuel oil heating and cooling device; 67, second accumulator; 68, eleventh gas film valve; 69, eleventh hand valve; 70, third oil pump; 71, third safety valve; 72, fifth hand valve; 73, eleventh pressure measuring point; 74, thirteenth temperature measuring point; 75, electric gate valve; 76, dryer; 77, twelfth pressure measuring point; 78, fourteenth temperature measuring point; 79, tenth hand valve; 80, air wave machine; 81, thirteenth pressure measuring point; 82, fifteenth temperature measuring point; 83, ninth gas film valve; 84, twelfth hand valve; 85, first air flowmeter; 86, sixteenth temperature measuring point; 87, fourteenth pressure measuring point; 88, second air flowmeter; 89, thirteenth hand valve; 90, eighth gas film valve; 91, mixing tank; 92, seventeenth temperature measuring point; 93, fifteenth pressure measuring point; 94, warmer; 95, ninth hand valve; 96, seventh gas film valve; 97, main oil return pipe; 98, cooling oil return pipe; 99, first pressure relief oil path; 100, second pressure relief oil path; 101, third pressure relief oil path; 102, first regulating oil path; 103, second regulating oil path; 104, first pressure relief gas pipe; 105, air inlet metering pipe; 106, second pressure relief gas pipe. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0027] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present application are only used to explain the relative positional relationship, movement condition, etc. between components in a certain posture (as shown in the drawings), and if the certain posture changes, the directional indications also change accordingly.

[0028] In addition, the description of “first”, “second” and the like in the present application is only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features defined as “first”, “second” can explicitly or implicitly include at least one of the features. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the realization of a person of ordinary skill in the art, and when the combination of technical solutions contradicts each other or cannot be realized, it should be considered that the combination of technical solutions does not exist, and is not within the protection scope of the present application.

[0029] In combination with Figure 1 In the first aspect, the embodiment provides a gas-liquid coupling nozzle performance test system, which comprises a fuel system, an air system, a vacuum test cabin 61 and a parameter acquisition module.

[0030] The fuel system is used to provide test pieces with fuel of adjustable temperature and flow.

[0031] The air system is used to provide test pieces with dry air of adjustable temperature and flow.

[0032] The vacuum test cabin 61 is used to accommodate test pieces and adjust the outlet back pressure of the test pieces.

[0033] The parameter acquisition module is used to synchronously acquire flow characteristic and atomization characteristic data.

[0034] Specifically, the fuel system comprises an oil storage tank 1, two parallel fuel pipelines (such as Figure 1The two fuel pipelines downstream are connected to a fuel heating and cooling device 66, and the fuel heating and cooling device 66 downstream is provided with two parallel test oil supply branches; the outlet end of the test oil supply branch is connected to the test piece in the vacuum test chamber 61; a main oil return pipe 97 is connected to the oil tank 1, and a third one-way valve 9 and a fourth oil filter 8 are sequentially arranged on the main oil return pipe 97 along the direction of oil flow. The vacuum test chamber 61 is connected to an oil-gas separator 14, and an air blower is connected to the oil-gas separator 14; the oil-gas separator 14 and the main oil return pipe 97 are connected through a cooling oil return pipe 98; an eighth hand valve 13 and a cooler 10 are sequentially arranged on the cooling oil return pipe 98 along the direction of oil flow. A seventh pressure measuring point 11 and an eighth temperature measuring point 12 are arranged on the cooling oil return pipe 98, and the seventh pressure measuring point 11 and the eighth temperature measuring point 12 are located at a position close to the upstream side of the cooler 10.

[0035] The oil-gas separator 14 is connected to a muffler 16 through a pipeline, and a tenth gas film valve 15 is arranged on the pipeline.

[0036] The air system comprises a vacuum pump group 17, a dryer 76, an air heating and cooling pipeline, and a mixing box 91, the vacuum pump group 17 is connected to the vacuum test chamber 61, the dryer 76 is arranged downstream of the air source inlet end, the downstream of the dryer 76 is connected to the air heating and cooling pipeline, the downstream of the air heating and cooling pipeline is connected to the mixing box 91, and the downstream of the mixing box 91 is connected to the vacuum test chamber 61.

[0037] The vacuum test chamber 61 is provided with a fourth temperature measuring point 58, a sixth pressure measuring point 59, and a gas discharge valve 60, and the downstream of the gas discharge valve 60 is connected to the muffler 16; the vacuum test chamber 61 is circumferentially provided with an optical glass window, and a light source is arranged inside.

[0038] The parameter acquisition module comprises an industrial camera, a PDPA device, a PIV device, and flow, pressure, and temperature measuring points arranged on each pipeline.

[0039] Further, an oil filling port 3, a first oil filter 4, a first temperature measuring point 2, a breather valve 6, an emptying valve 7, a liquid level meter 35, and a nitrogen filling port 5 are arranged on the oil tank 1. The oil filling port 3 is communicated with the oil tank 1 through the first oil filter 4. The oil tank 1 is filled with test oil through the oil filling port 3 and the oil filter 4, and the test oil allows various media such as aviation kerosene and lubricating oil to be injected according to test requirements.

[0040] The first temperature measuring point 2 is used to monitor the fuel temperature in the oil tank 1 in real time, to ensure that the fuel temperature is within the range of 5-45℃, and if the temperature exceeds the limit, the system will trigger an alarm, and the fuel heating and cooling device 66 will automatically start a negative feedback cycle. In this embodiment, the fuel heating and cooling device 66 uses silicone oil as the heat exchange medium, and the fuel heating and cooling range of the fuel heating and cooling device 66 is -47-130℃.

[0041] The breather valve 6 and the emptying valve 7 at the top of the oil tank 1 are used to stabilize the oil tank pressure; the liquid level gauge 35 is used for fuel volume measurement; and the nitrogen filling port 5 is used for fuel warming test nitrogen supplement to ensure test safety. A blowdown port is provided on the oil tank 1, and a fourteenth hand valve 36 is provided on the blowdown port. When the oil tank 1 is cleaned, the dirt in the oil tank 1 can be discharged through the blowdown port.

[0042] Further, as shown in Figure 1 The fuel system includes a main oil supply line; the fuel pipeline includes a first fuel pipeline and a second fuel pipeline; and the test oil supply branch line includes a first test oil supply branch line and a second test oil supply branch line.

[0043] The main oil supply line is connected to the oil outlet of the oil tank 1; and the end of the main oil supply line is connected to two branch pipes, one of which forms the first fuel pipeline, and the other of which forms the second fuel pipeline.

[0044] A first hand valve 37 and a first oil pump 42 are installed in sequence on the main oil supply line; and a ninth pressure measuring point 38 and an eleventh temperature measuring point 39 are provided between the first hand valve 37 and the first oil pump 42 on the main oil supply line. The first hand valve 37 is opened or closed as needed to realize oil supply / shutoff control of the oil line.

[0045] A second hand valve 45, a second oil pump 46, a first check valve 30, a second oil filter 29, a second mass flow meter 28, and a first accumulator 27 are installed in sequence on the first fuel pipeline; and a second pressure measuring point 32 and a sixth temperature measuring point 31 are provided between the second oil pump 46 and the first check valve 30.

[0046] A fifth hand valve 72, a third oil pump 70, a second check valve 50, a third oil filter 51, a third mass flow meter 52, and a second accumulator 67 are installed in sequence on the second fuel pipeline; and a third pressure measuring point 48 and a seventh temperature measuring point 49 are provided between the third oil pump 70 and the second check valve 50.

[0047] A fourth hand valve 57 is installed on the first test oil supply branch line; a tenth temperature measuring point 25 and an eighth pressure measuring point 26 are provided between the fourth hand valve 57 and the fuel heating and cooling device 66; and a second temperature measuring point 20 and a fourth pressure measuring point 21 are provided between the fourth hand valve 57 and the vacuum test chamber 61.

[0048] A seventh hand valve 64 is installed on the second test oil supply branch, and a tenth pressure measuring point 53 and a twelfth temperature measuring point 54 are arranged between the seventh hand valve 64 and a fuel temperature raising device 66; a third temperature measuring point 62 and a fifth pressure measuring point 63 are arranged between the seventh hand valve 64 and the vacuum test chamber 61.

[0049] The first oil pump 42 is used to provide a pre-pumping positive pressure for a second oil pump 46 and a third oil pump 70, and the second oil pump 46 and the third oil pump 70 are both variable frequency oil pumps.

[0050] The first fuel pipeline and the second fuel pipeline with different fuel flow ranges are arranged, and appropriate metering devices are arranged respectively to meet the test requirements of different fuel flow.

[0051] When the single oil pipeline works, one of the fuel pipelines is opened according to the test flow requirement, that is, the second hand valve 45 and the fourth hand valve 57 are opened at the same time, and the fifth hand valve 72 and the seventh hand valve 64 are closed. Or the second hand valve 45 and the fourth hand valve 57 are closed at the same time, and the fifth hand valve 72 and the seventh hand valve 64 are opened.

[0052] When the double oil pipeline works, the second hand valve 45, the fourth hand valve 57, the fifth hand valve 72 and the seventh hand valve 64 are opened at the same time.

[0053] In combination Figure 1 As shown in the drawings, the first pressure relief oil pipeline 99 is connected to the main oil supply pipeline, the first gas film valve 40 and the first safety valve 41 are arranged in parallel on the first pressure relief oil pipeline 99; the first pressure relief oil pipeline 99 is connected to the main oil return pipeline 97, the first pressure measuring point 43 and the fifth temperature measuring point 44 are arranged on the main oil supply pipeline, and the first pressure measuring point 43 is arranged between the first oil pump 42 and the first pressure measuring point 43.

[0054] The second pressure relief oil pipeline 100 is connected to the first fuel pipeline, the second safety valve 33 and the second gas film valve 34 are arranged in parallel on the second pressure relief oil pipeline 100; the second pressure relief oil pipeline 100 is connected to the main oil return pipeline 97, and the connection part of the second pressure relief oil pipeline 100 and the first fuel pipeline is located on the downstream side of the second oil pump 46.

[0055] The third pressure relief oil pipeline 101 is connected to the second fuel pipeline, the third gas film valve 47 and the third safety valve 71 are arranged in parallel on the third pressure relief oil pipeline 101; the third pressure relief oil pipeline 101 is connected to the main oil return pipeline 97, and the connection part of the third pressure relief oil pipeline 101 and the second fuel pipeline is located on the downstream side of the third oil pump 70.

[0056] A first regulating oil passage 102 is connected to the first test oil supply branch, and a first mass flow meter 22, a third hand valve 23, and a fifth gas film valve 24 are sequentially arranged on the first regulating oil passage 102 in the direction of oil flow. An outlet end of the first regulating oil passage 102 is connected to the cooling return oil pipe 98. The connection position of the first regulating oil passage 102 to the first test oil supply branch is arranged at a position on the upstream side of the fourth hand valve 57.

[0057] A second regulating oil passage 103 is connected to the second test oil supply branch, and a fourth mass flow meter 65, a sixth hand valve 55, and a sixth gas film valve 56 are sequentially arranged on the second regulating oil passage 103 in the direction of oil flow. An outlet end of the second regulating oil passage 103 is connected to the cooling return oil pipe 98. The connection position of the second regulating oil passage 103 to the second test oil supply branch is arranged at a position on the upstream side of the seventh hand valve 64.

[0058] The connection positions of the first regulating oil passage 102 and the second regulating oil passage 103 to the cooling return oil pipe 98 are between the eighth hand valve 13 and the cooler 10.

[0059] By adopting the above structure, the first oil pump 42, the second oil pump 46, and the third oil pump 70 are respectively correspondingly arranged with the first safety valve 41, the second safety valve 33, and the third safety valve 71 to ensure that the oil passage is not over-pressured.

[0060] The flow rate of the oil passage is adjusted by adjusting the opening degrees of the first gas film valve 40, the second gas film valve 34, and the third gas film valve 47 and the rotation speeds of the first oil pump 42, the second oil pump 46, and the third oil pump 70.

[0061] The first pressure measuring point 43, the second pressure measuring point 32, and the third pressure measuring point 48 and the fifth temperature measuring point 44, the sixth temperature measuring point 31, and the seventh temperature measuring point 49 are respectively arranged after the first oil pump 42, the second oil pump 46, and the third oil pump 70 to measure the oil pressure and the oil temperature at the outlets of the respective oil pumps.

[0062] During the test, the flow direction of the fuel is as follows: The fuel flows through the first check valve 30 / second check valve 50, the second oil filter 29 / third oil filter 51, the second mass flow meter 28 / third mass flow meter 52, the first accumulator 27 / second accumulator 67, the fuel heating and cooling device 66, the fourth hand valve 57 / seventh hand valve 64 in sequence, supplies the test piece in the vacuum test chamber 61 with fuel, realizes oil-gas separation through the oil-gas separator 14, enters the cooling return oil pipe 98 through the eighth hand valve 13, and flows back to the fuel tank 1 through the cooler 10 after being cooled. In the single-nozzle performance test without air mixing, the air blower needs to be turned on to suck oil mist.

[0063] The first adjusting oil path 102 and the second adjusting oil path 103 are arranged at the inlet of the vacuum test chamber 61 respectively. The inlet end of the first adjusting oil path 102 is arranged at a position 100 mm in front of the fourth hand valve 57, and the inlet end of the second adjusting oil path 103 is arranged at a position 100 mm in front of the seventh hand valve 64. The first adjusting oil path 102 and the second adjusting oil path 103 are controlled by the third hand valve 23 and the sixth hand valve 55, the fuel flow of the adjusting oil path is controlled by the opening degree of the fifth gas film valve 24 and the sixth gas film valve 56, and the oil is returned to the oil tank 1 through the cooler 10, the one-way valve 9 and the oil filter 8. In the test, the third hand valve 23 and the sixth hand valve 55 are opened, and the fourth hand valve 57 and the seventh hand valve 64 are closed, so that the fuel path is circulated, and the fuel in the oil tank can be heated or cooled to a suitable temperature.

[0064] The fuel temperature state adjusting mode under the small flow condition is as follows: The fuel flow demand of the nozzle performance test is small, usually below 15 kg / h. Under the small flow condition, the heat loss of the pipeline along the way is fast, and the fuel heating and cooling device needs to consider the heat loss of the pipeline along the way before the inlet of the test piece. In the test, the fuel is heated as much as possible in the fuel heating and cooling device, the fuel heat in the pipeline is increased, the fuel is branched before entering the test piece, the target flow is obtained by adjusting the opening degree of the fifth gas film valve 24 and the sixth gas film valve 56, and the length of the pipeline under the small flow condition is shortened as much as possible.

[0065] Combined with Figure 1 As shown in the figure, in the embodiment, the air heating and cooling pipeline includes an air heating branch, an air cooling branch and a normal temperature air pipeline which are arranged in parallel.

[0066] The ninth hand valve 95 and the heater 94 are arranged on the air heating branch in sequence along the airflow direction, and the fifteenth pressure measuring point 93 and the seventeenth temperature measuring point 92 are further arranged after the heater 94.

[0067] The tenth hand valve 79 and the air wave machine 80 are arranged on the air cooling branch in sequence along the airflow direction, and the thirteenth pressure measuring point 81 and the fifteenth temperature measuring point 82 are further arranged after the air wave machine 80.

[0068] The eleventh hand valve 69 and the eleventh gas film valve 68 are arranged on the normal temperature air pipeline in sequence along the airflow direction.

[0069] The inlet ends of the air heating branch, the air cooling branch and the normal temperature air pipeline are connected with the dryer 76 in parallel, and the outlet ends are connected with the mixing box 91 in parallel.

[0070] The pipeline between the dryer 76 and the air source is provided with an electric gate valve 75, and the electric gate valve 75 is provided with an eleventh pressure measuring point 73 and a thirteenth temperature measuring point 74 in sequence; a first pressure relief air pipe 104 is connected to the pipeline between the electric gate valve 75 and the dryer 76; a seventh air film valve 96 is installed on the first pressure relief air pipe 104; and the first pressure relief air pipe 104 is connected to the muffler 16. The dryer 76 and the air heating and cooling pipeline are provided with a twelfth pressure measuring point 77 and a fourteenth temperature measuring point 78.

[0071] A ninth air film valve 83 and an air inlet metering pipeline 105 are sequentially installed on the pipeline between the mixing box 91 and the vacuum test cabin 61, and a fourteenth pressure measuring point 87 and a sixteenth temperature measuring point 86 are arranged between the air inlet metering pipeline 105 and the vacuum test cabin 61.

[0072] The air inlet metering pipeline 105 comprises a first branch and a second branch arranged in parallel; a twelfth hand valve 84 and a first air flow meter 85 are sequentially connected in series on the first branch; and a thirteenth hand valve 89 and a second air flow meter 88 are sequentially connected in series on the second branch.

[0073] A second pressure relief air pipe 106 is connected to the pipeline between the mixing box 91 and the ninth air film valve 83, and an eighth air film valve 90 is installed on the second pressure relief air pipe 106; the second pressure relief air pipe 106 is connected to the muffler 16; and the inlet end of the second pressure relief air pipe 106 is located before the ninth air film valve 83.

[0074] A fourth air film valve 19 is arranged on the pipeline between the vacuum pump set 17 and the vacuum test cabin 61.

[0075] The vacuum test cabin 61 is evacuated by the vacuum pump set 17, and the temperature measuring point 58 and the pressure measuring point 59 are used to monitor the temperature and pressure of the test cabin in real time. The electric gate valve 75 controls the on-off of the air source, and the air flow enters the air heating and cooling pipeline after passing through the dryer 76. Specifically: When the air is heated, the ninth hand valve 95 and the heater 94 are opened.

[0076] When the air is cooled, the tenth hand valve 79 and the air wave machine 80 are opened.

[0077] The eleventh hand valve 69 is opened, the opening degree of the eleventh air film valve 68 is adjusted to control the normal temperature gas flow, the air with heating and cooling enters the mixing box 91, the opening degrees of the ninth air film valve 83 and the eighth air film valve 90 are adjusted to obtain the target flow, and then the air enters the vacuum test cabin 61 to supply air for the test piece, the oil and gas are separated through the oil and gas separator 14, the air enters the muffler 16 through the tenth air film valve 15 and is discharged into the atmosphere. The muffler 16 is used to reduce the exhaust noise In the test, according to the test state flow, one of the twelfth hand valve 84 and the thirteenth hand valve 89 is selected to open, corresponding to the first air flow meter 85 and the second air flow meter 88 to realize air flow metering.

[0078] The vacuum test cabin 61 is provided with four large optical glass windows in the circumferential direction, and a light source is arranged inside, the light source intensity can be adjusted, the nozzle atomization cone angle is shot by an industrial camera, and the cone angle data acquisition is realized. Through laser transmission, the PDPA and PIV optical diagnosis technologies are used to realize the nozzle atomization parameter acquisition.

[0079] In the second aspect, the embodiment provides a gas-liquid coupling nozzle performance test method, and the test system is used, and the method comprises the following steps: S1, system preparation: adding test oil to the oil storage tank 1, vacuumizing and adjusting the initial pressure of the vacuum test cabin 61 by the vacuum pump set 17, and starting the drying machine 76; S2, fuel working condition adjustment: selecting single or double oil supply, opening the fuel heating and cooling device 66, adjusting the fuel temperature and flow, and supplying oil to the test piece; S3, air working condition adjustment: according to the requirement, opening the air heating and cooling pipeline, adjusting the air temperature and flow, and inputting into the test cabin; S4, back pressure adjustment: jointly adjusting the air release valve 60 and the eighth gas film valve 90 and the ninth gas film valve 83, so that the outlet back pressure of the test piece meets the standard; S5, parameter acquisition: the industrial camera, the PDPA equipment and the PIV equipment collect the atomization characteristic data, and the flow, pressure and temperature data are recorded synchronously; S6, test end: closing the fourth hand valve 57, the seventh hand valve 64, the second hand valve 45 and the fifth hand valve 72, stopping the first oil pump 42, the second oil pump 46, the third oil pump 70 and the vacuum pump set 17, closing the electric gate valve 75 and the heater 94, releasing the pressure of the oil storage tank 1, and cleaning the residual lubricating oil of the system.

[0080] The above only describes the preferred embodiments of the present application, and does not limit the patent range of the present application, and any equivalent structural transformation made according to the inventive concept of the present application, or direct / indirect application in other related technical fields is included in the patent protection range of the present application.

Claims

1. A gas-liquid coupling nozzle performance test system, characterized in that, The fuel system, the air system, a vacuum test chamber (61) and a parameter acquisition module are comprised. The fuel system is used for providing the test piece with fuel with adjustable temperature and flow rate. The air system is used for providing the test piece with dry air with adjustable temperature and flow rate. The vacuum test chamber (61) is used for accommodating the test piece and adjusting the outlet back pressure of the test piece. The parameter acquisition module is used for synchronously acquiring flow characteristic and atomization characteristic data.

2. The performance test system of a gas-liquid coupled nozzle according to claim 1, characterized in that: The fuel system comprises an oil storage tank (1), two parallel fuel pipelines arranged downstream of the oil storage tank (1), a fuel heating and cooling device (66) connected downstream of the two fuel pipelines, and two parallel test fuel supply branches arranged downstream of the fuel heating and cooling device (66); the outlet ends of the test fuel supply branches are connected with the test piece in the vacuum test chamber (61); a main oil return pipeline (97) is connected to the oil storage tank (1); the vacuum test chamber (61) is connected with an oil-gas separator (14); the oil-gas separator (14) and the main oil return pipeline (97) are connected through a cooling oil return pipeline (98); an eighth hand valve (13) and a cooler (10) are sequentially arranged on the cooling oil return pipeline (98) along the direction of oil flow; the oil-gas separator (14) is connected with a silencer (16) through a pipeline, and a tenth gas film valve (15) is arranged on the pipeline; The air system comprises a vacuum pump group (17), a drying machine (76), an air heating and cooling pipeline and a mixing box (91); the vacuum pump group (17) is connected with the vacuum test chamber (61); the drying machine (76) is arranged downstream of the air inlet end of an air source; the air heating and cooling pipeline is connected downstream of the drying machine (76); the mixing box (91) is connected downstream of the air heating and cooling pipeline; the mixing box (91) is connected downstream with the vacuum test chamber (61); The vacuum test chamber (61) is provided with a fourth temperature measuring point (58), a sixth pressure measuring point (59) and a gas discharge valve (60); the downstream of the gas discharge valve (60) is connected to the silencer (16); the vacuum test chamber (61) is circumferentially provided with an optical glass window, and an optical light source is arranged inside the vacuum test chamber (61); The parameter acquisition module comprises an industrial camera, a PDPA device, a PIV device and flow, pressure and temperature measuring points arranged on each pipeline.

3. The performance test system of a gas-liquid coupled nozzle according to claim 2, characterized in that: An oil filling port (3), a first oil filter (4), a first temperature measuring point (2), a breathing valve (6), an emptying valve (7), a liquid level meter (35) and a nitrogen filling port (5) are arranged on the oil storage tank (1); The oil filling port (3) is in communication with the oil storage tank (1) through the first oil filter (4); The first temperature measuring point (2) is used for monitoring the fuel temperature in the oil storage tank (1); The breathing valve (6) and the emptying valve (7) are used for stabilizing the pressure of the oil storage tank (1); The liquid level meter (35) is used for fuel volume measurement; The nitrogen filling port (5) is used for supplementing nitrogen for fuel heating test; A pollution discharge port is arranged on the oil storage tank (1), and a fourteenth hand valve (36) is arranged on the pollution discharge port.

4. The performance test system of a gas-liquid coupled nozzle according to claim 2, characterized in that: The fuel system comprises a main fuel supply line; the fuel pipeline comprises a first fuel pipeline and a second fuel pipeline; the test fuel supply branch line comprises a first test fuel supply branch line and a second test fuel supply branch line; The main fuel supply line is connected to the oil outlet of the oil tank (1); the end of the main fuel supply line is connected to two branch pipes, one of which forms the first fuel pipeline and the other of which forms the second fuel pipeline; A first hand valve (37) and a first oil pump (42) are sequentially installed on the main fuel supply line; A second hand valve (45), a second oil pump (46), a first check valve (30), a second oil filter (29) and a second mass flow meter (28) are sequentially installed on the first fuel pipeline; A fifth hand valve (72), a third oil pump (70), a second check valve (50), a third oil filter (51) and a third mass flow meter (52) are sequentially installed on the second fuel pipeline; A fourth hand valve (57) is installed on the first test fuel supply branch line; A seventh hand valve (64) is installed on the second test fuel supply branch line; The first oil pump (42) is used to provide pre-pump positive pressure for the second oil pump (46) and the third oil pump (70), and the second oil pump (46) and the third oil pump (70) are both variable frequency oil pumps.

5. The performance test system of the gas-liquid coupling nozzle according to claim 4, characterized in that: A first pressure relief oil line (99) is connected to the main fuel supply line, and a first gas film valve (40) and a first safety valve (41) are arranged in parallel on the first pressure relief oil line (99); the first pressure relief oil line (99) is connected to the main oil return pipe (97), and the connection part of the first pressure relief oil line (99) and the main fuel supply line is located on the downstream side of the first oil pump (42); A second pressure relief oil line (100) is connected to the first fuel pipeline, and a second safety valve (33) and a second gas film valve (34) are arranged in parallel on the second pressure relief oil line (100); the second pressure relief oil line (100) is connected to the main oil return pipe (97), and the connection part of the second pressure relief oil line (100) and the first fuel pipeline is located on the downstream side of the second oil pump (46); A third pressure relief oil line (101) is connected to the second fuel pipeline, and a third gas film valve (47) and a third safety valve (71) are arranged in parallel on the third pressure relief oil line (101); the third pressure relief oil line (101) is connected to the main oil return pipe (97), and the connection part of the third pressure relief oil line (101) and the second fuel pipeline is located on the downstream side of the third oil pump (70); A first adjusting oil line (102) is connected to the first test fuel supply branch line, and a first mass flow meter (22), a third hand valve (23) and a fifth gas film valve (24) are sequentially installed on the first adjusting oil line (102) along the direction of oil flow; the outlet end of the first adjusting oil line (102) is connected to the cooling oil return pipe (98); A second regulating oil path (103) is connected to the second test oil supply branch, and a fourth mass flow meter (65), a sixth hand valve (55) and a sixth gas film valve (56) are sequentially arranged on the second regulating oil path (103) in the direction of oil flow; and an outlet end of the second regulating oil path (103) is connected to the cooling return oil pipe (98); The connection positions of the first regulating oil path (102) and the second regulating oil path (103) with the cooling return oil pipe (98) are between the eighth hand valve (13) and the cooler (10).

6. The performance test system of a gas-liquid coupled nozzle according to claim 2, characterized in that: The fuel heating and cooling device (66) uses silicone oil as the heat exchange medium, and the fuel heating and cooling range of the fuel heating and cooling device (66) is -47-130°C.

7. The performance test system of a gas-liquid coupling nozzle according to claim 2, characterized in that: The air heating and cooling pipeline comprises an air heating branch, an air cooling branch and a normal-temperature air pipeline which are connected in parallel; The air heating branch is sequentially provided with a ninth hand valve (95) and a heater (94) in the direction of air flow; The air cooling branch is sequentially provided with a tenth hand valve (79) and an air wave machine (80) in the direction of air flow; The normal-temperature air pipeline is sequentially provided with an eleventh hand valve (69) and an eleventh gas film valve (68) in the direction of air flow; The inlet ends of the air heating branch, the air cooling branch and the normal-temperature air pipeline are connected to the dryer (76) in parallel, and the outlet ends thereof are connected to the mixing box (91) in parallel.

8. The performance test system for gas-liquid coupling nozzle according to claim 2, characterized in that: An electric gate valve (75) is arranged on the pipeline between the dryer (76) and the air source, a first pressure relief air pipe (104) is connected to the pipeline between the electric gate valve (75) and the dryer (76), a seventh gas film valve (96) is arranged on the first pressure relief air pipe (104), and the first pressure relief air pipe (104) is connected to the silencer (16).

9. The performance test system for a gas-liquid coupling nozzle according to claim 2, characterized in that: A ninth gas film valve (83) and an air inlet metering pipeline (105) are sequentially arranged on the pipeline between the mixing box (91) and the vacuum test chamber (61), and the air inlet metering pipeline (105) comprises a first branch and a second branch which are connected in parallel; The first branch is sequentially connected in series with a twelfth hand valve (84) and a first air flow meter (85); The second branch is sequentially connected in series with a thirteenth hand valve (89) and a second air flow meter (88); A second pressure relief air pipe (106) is connected to the pipeline between the mixing box (91) and the ninth gas film valve (83), an eighth gas film valve (90) is arranged on the second pressure relief air pipe (106), and the second pressure relief air pipe (106) is connected to the silencer (16); A fourth gas film valve (19) is arranged on the pipeline between the vacuum pump group (17) and the vacuum test chamber (61).

10. A method of testing the performance of a gas-liquid coupling nozzle, characterized by: The test system of claim 2 comprises the following steps: S1, system preparation: filling the test oil into the oil storage tank (1), adjusting the initial pressure of the vacuum test chamber (61) by vacuumizing through the vacuum pump group (17), and starting the dryer (76); S2, fuel condition adjustment: select single or double oil supply, open fuel heating and cooling device (66), adjust fuel temperature and flow, supply fuel to the test piece; S3, air condition adjustment: according to the demand, open air heating and cooling pipeline, adjust air temperature and flow, and input into the test cabin; S4, back pressure adjustment: make the outlet back pressure of the test piece reach the standard; S5, parameter collection: industrial camera, PDPA equipment and PIV equipment collect atomization characteristic data, and synchronously record flow, pressure and temperature data; S6, test end: close each part, clean the residual medium in the system.

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