A multi-channel adjustable jet system and adjustment method

Abstract

The present invention provides a multi-channel adjustable jet system and adjustment method, which relates to the technical field of multi-channel jet performance test and experiment, and solves the technical problems of gas source fluctuation, parameter instability and mutual coupling interference of parameters. The multi-channel adjustable jet system includes a gas source, a model nozzle, multiple jet channels, an exhaust channel, a jet adjustment component, an exhaust adjustment component, a temperature sensor and a pressure sensor. The jet channels are arranged in parallel and connected between the gas source and the model nozzle; the exhaust channel is connected to the gas source outlet side and is arranged in parallel with all the jet channels; the jet adjustment component is arranged on each jet channel; the exhaust adjustment component is arranged on the exhaust channel; the temperature sensor and the pressure sensor are installed at the inlet of the model nozzle. The present invention is used for jet simulation, and the same gas source pressure / flow is decoupled and adjusted in steps during operation, eliminating mutual interference while ensuring the stability of the gas source, and quickly achieving the required multi-channel jet state.

Description

Technical Field

[0001] The invention relates to the technical field of multi-channel jet performance testing, and in particular to a multi-channel adjustable jet system and a regulating method. Background Art

[0002] The multi-channel jet system is a simulated jet device used in aircraft jet performance test. The core component for generating multi-channel jet conditions is the jet generation regulating device. The jet generation regulating device is generated by the temperature and pressure regulating components installed on the effective gas source pipeline. The multi-channel jet parameters are achieved by adjusting the air supply pressure / flow and temperature using the jet generation regulating device. It is mostly used to build various jet testers, composite jet test benches and other test facilities. Accurate and effective control of the relevant parameters of each flow path can achieve the simulation of various jet conditions. The goal of the air supply pressure / flow regulation of the multi-channel jet system is to adjust the temperature and pressure parameters of multiple flow paths to the specified parameter values ​​in a relatively short period of time, and to maintain a continuous and uninterrupted stable jet state.

[0003] At present, there are mainly the following methods for adjusting parameters in multi-channel jet systems at home and abroad:

[0004] 1) According to the established parameter states of the multi-channel jet, a single independent air source is equipped to ensure a relatively stable air supply. The flow / pressure parameter adjustment range is single, and the cost of equipping each channel with an independent air source is difficult to effectively control; this method is suitable for large jet test benches with fewer channels and low jet volume changes.

[0005] 2) Use a single air supply pressure source to supply air to multi-channel jet pipelines at the same time, and connect to the jet channel pipeline through multiple regulating valves to complete different pressure adjustments. However, there is mutual coupling interference of parameters when each valve is adjusted at the same time, and the air source is mostly a screw air compressor unit. The air source itself has a loading and unloading process, which affects the stability of the air source. At the same time, the fluctuation of the air source will further couple with the regulating valve to form interference, the adjustment time is long, and the parameter deviation fluctuates greatly. It is suitable for medium-sized jet test benches with fewer channels.

[0006] 3) Use a single gas source for multi-channel jetting and add a suitable volume gas tank for each channel to stabilize the pressure, reduce the interference of gas source fluctuations, and independently adjust the multi-channel jetting. Because the volume of the gas tank increases with the jetting volume, the hardware site area required is larger, which is suitable for a multi-channel jetting test bench with a smaller flow rate.

[0007] The above methods all have the risk of gas source fluctuations affecting parameter stability. When a cost-saving single gas source is selected, there is also the problem of mutual coupling interference between the regulating valve parameters. Therefore, how to solve the gas source and coupling interference becomes the key to the success of the multi-channel jet test. Summary of the invention

[0008] The object of the present invention is to provide a multi-channel adjustable jet system and a regulating method to solve the technical problems of gas source fluctuation, parameter instability and mutual coupling interference of parameters existing in the prior art.

[0009] To achieve the above object, the present invention provides the following technical solutions:

[0010] The present invention provides a multi-channel adjustable jet system, comprising an air source, a model nozzle, a plurality of jet channels, an exhaust channel, a jet adjustment component, an exhaust adjustment component, a temperature sensor and a pressure sensor, wherein:

[0011] The jet flow channels are arranged in parallel and connected between the gas source and the model nozzle to form inner and outer ring jet simulations at the model nozzle;

[0012] The exhaust flow channel is connected to the gas source outlet side and is arranged in parallel with all the gas injection flow channels;

[0013] The jet adjustment assembly is arranged on each of the jet flow channels;

[0014] The drain regulating assembly is arranged on the drain flow channel;

[0015] The temperature sensor and the pressure sensor are installed at the inlet of the model nozzle.

[0016] As a further improvement of the present invention, the emptying regulating assembly includes a second control valve and a second self-operated pressure reducing valve which are arranged in sequence.

[0017] As a further improvement of the present invention, the exhaust adjustment assembly also includes a second muffler connected to the outlet side of the second self-operated pressure reducing valve.

[0018] As a further improvement of the present invention, it also includes a bypass flow channel, one end of which is connected to the inlet side of the second control valve, and the other end is connected to the outlet side of the second self-operated pressure reducing valve, and a safety valve is arranged on the bypass flow channel.

[0019] As a further improvement of the present invention, the jet adjustment assembly includes a switch butterfly valve, a flow meter, a first self-operated pressure reducing valve, a first control valve, a pipeline heater and a first muffler which are arranged in sequence.

[0020] As a further improvement of the present invention, the flow meter is a medium flow meter.

[0021] As a further improvement of the present invention, the pipeline heater is a superheating heater.

[0022] As a further improvement of the present invention, the second control valve is a pressure control valve.

[0023] As a further improvement of the present invention, the first control valve is a pressure and flow control valve.

[0024] As a further improvement of the present invention, the air source is a centrifugal air compressor.

[0025] The present invention provides a regulation method, based on the multi-channel adjustable jet system, comprising the following steps:

[0026] Step S1, presetting the jet target value and the adjustment logic information between the jet adjustment component and the exhaust adjustment component in the control module part of the multi-channel adjustable jet system;

[0027] Step S2, initial adjustment: open the gas source, form a partial pipe resistance load through the first self-operated pressure reducing valve in the jet adjustment assembly, and when the pipe resistance load initially approaches the jet target value interval specified by each jet flow channel, adjust the first regulating valve again to make the jet parameter value meet the specified target value required by the test;

[0028] Step S3, closed-loop adjustment: After step S2 is completed, when the test state needs to be changed to adjust the target value, the multi-channel adjustable jet system performs real-time closed-loop control adjustment according to the adjustment logic information preset in step S1, so that the jet parameter value in the jet flow channel follows the target value in real time;

[0029] Step S4: When the multi-channel adjustable jet system is in low-load operation, the excess gas generated by the gas source is discharged through the exhaust channel.

[0030] Compared with the prior art, the present invention has the following beneficial effects:

[0031] The multi-channel adjustable jet system provided by the present invention is a multi-channel adjustable jet system that can eliminate air source interference and solve adjustment coupling interference at the same time. By setting an emptying channel and an emptying adjustment component, and the second control valve in the emptying channel and the air source pressure have a closed-loop control relationship, the system can always maintain operation at the rated output pressure / flow of the centrifugal air compressor. Since the working principle of the centrifugal air compressor does not have a loading and unloading process, and the output is relatively stable under the rated working state, the first self-operated pressure reducing valve in the jet channel is used to further play a role in stabilizing the pressure, so that the problem of air source stability can be effectively solved without the need for an air storage tank, and the multi-channel jet pressure / flow and temperature rapid response can be achieved. In addition, the jet system has the characteristics of simple composition, convenient parameter adjustment, stable and reliable operation, high degree of automation, and good safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0033] Figure 1 It is a process principle diagram of the multi-channel adjustable jet system of the present invention.

[0034] In the figure, 1, switch butterfly valve; 2, flow meter; 3, first self-operated pressure reducing valve; 4, first control valve; 5, pipeline heater; 6, first muffler; 7, second control valve; 8, second self-operated pressure reducing valve; 9, safety valve; 10, second muffler; 11, model nozzle; 12, air source. DETAILED DESCRIPTION

[0035] To make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be described in detail below. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other implementation methods obtained by ordinary technicians in this field without creative work belong to the scope of protection of the present invention.

[0036] like Figure 1 As shown, the present invention provides a multi-channel adjustable jet system, including an air source 12, a model nozzle 11, a plurality of jet channels, an exhaust channel, a jet adjustment component, an exhaust adjustment component, a temperature sensor and a pressure sensor, wherein:

[0037] The jet flow channels are arranged in parallel and connected between the gas source 12 and the model nozzle 11 to form inner and outer ring jet simulations at the model nozzle 11;

[0038] The exhaust flow channel is connected to the outlet side of the gas source 12 and is arranged in parallel with all the gas injection flow channels;

[0039] The jet adjustment assembly is arranged on each jet flow channel;

[0040] The drain regulating assembly is arranged on the drain flow passage;

[0041] The temperature sensor and the pressure sensor are installed at the inlet of the model nozzle 11.

[0042] The invention also includes a control module, which is implemented by programming using products in the prior art. The control module can preset parameters, and preset the jet target value and the adjustment parameters of the jet adjustment component and the exhaust adjustment component that need to be controlled when different target values ​​are reached. Therefore, in actual use, the real-time parameter information transmitted by the temperature sensor and the pressure sensor can be compared with the adjustment parameters of the corresponding adjustment components with different target values, and timely adjustments can be made. Therefore, the real-time jet parameters of each flow channel form a closed-loop control loop with the corresponding sensor of the jet outlet, thereby realizing a closed-loop adjustment function.

[0043] It should be noted here that Figure 1 As shown, an embodiment of setting two jet flow channels is schematically illustrated. The two jet flow channels are respectively connected to the inner cavity and the outer cavity of the model nozzle 11, so that inner and outer ring jets are formed at the model nozzle 11.

[0044] As an optional embodiment of the present invention, the exhaust regulating assembly includes a second control valve 7 and a second self-operated pressure reducing valve 8 which are arranged in sequence.

[0045] As an optional embodiment of the present invention, the exhaust adjustment assembly further includes a second muffler 10 connected to the outlet side of the second self-operated pressure reducing valve 8 .

[0046] It also includes a bypass flow channel, one end of which is connected to the inlet side of the second control valve 7, and the other end is connected to the outlet side of the second self-operated pressure reducing valve 8, and a safety valve 9 is arranged on the bypass flow channel.

[0047] Furthermore, the jet adjustment component includes a switch butterfly valve 1, a flow meter 2, a first self-operated pressure reducing valve 3, a first control valve 4, a pipeline heater 5 and a first muffler 6 which are arranged in sequence.

[0048] The flow meter 2 is a medium flow meter 2 .

[0049] The pipeline heater 5 is a superheating heater, which can achieve rapid heating with a heating speed of 3K / s.

[0050] The second control valve 7 is a pressure control valve.

[0051] The first control valve 4 is a pressure and flow control valve.

[0052] The air source 12 is a centrifugal air compressor.

[0053] It should be noted that the control valves in the present invention are all regulating valves with adjustable parameters.

[0054] The multi-channel adjustable jet system provided by the present invention is a multi-channel adjustable jet system that can eliminate the interference of the air source 12 and solve the adjustment coupling interference at the same time. By setting the emptying channel and the emptying adjustment component, and the second control valve 7 in the emptying channel and the air source 12 pressure have a closed-loop control relationship, it can always maintain the operation at the rated output pressure / flow of the centrifugal air compressor. Because the working principle of the centrifugal air compressor does not have a loading and unloading process, and the output is relatively stable under the rated working state, it cooperates with the first self-operated pressure reducing valve 3 in the jet channel to further play a role in stabilizing the pressure, so that the problem of the stability of the air source 12 can be effectively solved without the need for an air storage tank, and the multi-channel jet pressure / flow and temperature can be achieved. Rapid response, and this jet system also has the characteristics of simple composition, convenient parameter adjustment, stable and reliable operation, high degree of automation, and good safety.

[0055] The present invention provides a regulation method based on a multi-channel adjustable jet system, comprising the following steps:

[0056] Step S1, presetting the jet target value and the adjustment logic information between the jet adjustment component and the exhaust adjustment component in the control module part of the multi-channel adjustable jet system;

[0057] Step S2, initial adjustment: open the gas source 12, form a partial pipe resistance load through the first self-operated pressure reducing valve 3 in the jet adjustment assembly, and when the pipe resistance load initially approaches the jet target value interval specified by each jet flow channel, adjust the first regulating valve again to make the jet parameter value meet the specified target value required by the test;

[0058] Step S3, closed-loop adjustment: After step S2 is completed, when it is necessary to change the test state to adjust the target value, the multi-channel adjustable jet system performs real-time closed-loop control adjustment according to the adjustment logic information preset in step S1, so that the jet parameter value in the jet flow channel follows the target value in real time.

[0059] Step S4: When the multi-channel adjustable jet system is in low-load operation, the excess gas generated by the gas source 12 is discharged through the exhaust channel.

[0060] Embodiment 1:

[0061] In the present embodiment, a multi-channel adjustable jet system is provided, which includes an air source 12, a first and a second self-operated pressure reducing valve, a first and a second control valve, a flow meter, a safety valve, a temperature sensor, a pressure sensor, a pipeline heater, a first and a second muffler, and related pipelines. The air source 12 uses a centrifugal air compressor with a very small fluctuation in the rated working state as the jet air source 12 to ensure the stability of the air source 12. By adding an emptying flow channel and a second self-operated pressure reducing valve, a second control valve, a bypass pipeline and a safety valve on the emptying flow channel, and a second muffler, the centrifugal air compressor is always kept in a rated output state with stable output. The second control valve pressure regulating valve on the emptying flow channel The interlocking pressure sensor forms a closed-loop control circuit, which is connected to the second self-operated pressure reducing valve after pressure regulation by the second control valve. The outlet of the second self-operated pressure reducing valve is connected to the second silencer of the pipeline. The gas after silencing by the second silencer is discharged to the atmosphere. Taking the two-way test flow channel system as an example, a specific description is given. The gas source outlet pipeline is divided into three routes and is respectively connected to the first flow channel, the second flow channel and the exhaust flow channel. Among them, the first flow channel and the second flow channel are firstly connected to the first self-operated pressure reducing valve, and the outlet is connected to the first control valve, and then enter the high-temperature section to connect to the pipeline heater, and the outlet of the pipeline heater is connected to the first silencer of the high-temperature resistant pipeline, and then the corresponding first flow channel and second flow channel interfaces are connected to the model nozzle or test piece.

[0062] During the test, the switch butterfly valve 1 of each flow channel is opened, and the medium passes through the mass flow meter 2, and then the first self-operated pressure reducing valve 3 is used for pressure stabilization and pressure reduction. After that, the first control valve 4 of each flow channel pressure / flow is used for closed-loop control adjustment, and the parameters are set to the target value. Then, the temperature is adjusted to the target temperature through the pipe heater 5 equipped in each flow channel, and finally, it flows through the first muffler 6 for noise reduction, and the gas that meets the experimental parameter requirements is connected to the model nozzle 11 / test piece for multi-channel jet experiment. This process realizes the task of multi-channel jet temperature and pressure regulation, and completes the decoupling regulation of pressure / flow in multiple channels. While completing the above decoupling regulation, the excess gas is adjusted by the second control valve 7 in the emptying flow channel, and then connected to the second self-operated pressure reducing valve 8 for pressure reduction, so that the wind pressure of the gas to be emptied is slightly higher than the atmospheric pressure. This is mainly used to reduce the noise pollution at the factory boundary. The air after pressure reduction is connected to the second muffler 10 for further noise reduction, and finally emptied to the atmosphere. At this time, the test can be started immediately, the test state can be continuously maintained stable, and the test results are highly reliable.

[0063] The decoupling method of the above-mentioned multi-channel adjustable jet system is that the first step is to form a partial pipe resistance load through the first self-operated pressure reducing valve in the multi-channel, initially approach the specified pressure / flow interval of each channel, and then through the pressure / flow regulating valve (that is, the first control valve), the pressure / flow parameter value meets the specified value of the test requirement. At this time, each channel parameter forms a closed-loop control loop with the corresponding sensor of the jet outlet. Through the above settings, when the air flow pressure / flow provided by the gas source 12 is sufficient, due to the effect of the second self-operated pressure reducing valve, a regulating valve with a small adjustable ratio can be selected. Since the small adjustable ratio has high adjustment accuracy, the jet parameter accuracy can be guaranteed to be high and the cost is low. At the same time, when the test state is changed (the regulating valve is activated), the regulating valve adopts a closed-loop control method to follow the target value in real time. This can eliminate the system error to the maximum extent to ensure the adjustment effect. The excess gas is vented through the emptying channel to ensure that the pressure / flow parameters of each channel do not interfere with each other when the pressure / flow of the gas source 12 is sufficient.

[0064] The adjustment process of the above-mentioned flow channel regulating valves is to adjust each flow channel separately. Under the premise of using a single gas source, coupling interference is likely to occur. However, since a first self-operated pressure reducing valve is arranged in front of each flow channel regulating valve, the pressure after the valve can be set close to the target value, and then the pressure is accurately adjusted by the regulating valve, so that the upstream pressure change range is limited when the regulating valve is actuated, and the pressure in front of the valve will not change widely in a short period of time. The pressure in front of the pressure reducing valve is always continuously stable, thereby avoiding the continuous turbulence (coupling) of the pressure / flow in each flow channel.

[0065] When the pressure / flow control devices of the above-mentioned flow channels are working, an emptying flow channel is provided, and the second control valve in the emptying flow channel and the gas source pressure sensor form a closed-loop control circuit. When the pressure / flow regulating valves of each flow channel are working, the rise / fall of the gas source pressure prompts the opening of the second control valve in the emptying flow channel to change to stabilize the gas source pressure, so that the incoming flow pressure is always kept within a stable range, thereby eliminating the interference of gas source fluctuations. Each flow channel pipeline is equipped with an independent pipeline heater to meet the respective jet temperature requirements and achieve the purpose of regulating the medium temperature. After the system runs stably, an effective multi-flow channel jet state is formed, the system works continuously and stably, and the test parameters are reliable;

[0066] The jet system of the present invention has a simple principle, no special parts, is easy to process, and occupies a small space for device implementation; it can realize the function of rapid response of multi-channel jet equipment parameters, further simplifying the test method of multi-channel jet and further expanding the test range.

[0067] First of all, it should be explained here that “inward” refers to the direction toward the center of the accommodating space, and “outward” refers to the direction away from the center of the accommodating space.

[0068] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate directions or positional relationships based on the attached Figure 1 The orientation or positional relationship shown is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0069] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0070] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0071] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0072] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0073] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A multi-channel adjustable jet system, characterized in that: It includes an air source, a model nozzle, a plurality of jet flow channels, an exhaust flow channel, a jet adjustment component, an exhaust adjustment component, a temperature sensor and a pressure sensor, wherein: The jet flow channels are arranged in parallel and connected between the gas source and the model nozzle to form inner and outer ring jet simulations at the model nozzle; The exhaust flow channel is connected to the gas source outlet side and is arranged in parallel with all the gas injection flow channels; The jet adjustment assembly is arranged on each of the jet flow channels; The drain regulating assembly is arranged on the drain flow channel; The temperature sensor and the pressure sensor are installed at the inlet of the model nozzle; The emptying regulating assembly comprises a second control valve and a second self-operated pressure reducing valve which are arranged in sequence; The jet adjustment assembly comprises a switch butterfly valve, a flow meter, a first self-operated pressure reducing valve, a first control valve, a pipeline heater and a first muffler which are arranged in sequence.

2. The multi-channel adjustable jet system according to claim 1, characterized in that: The exhaust adjustment assembly also includes a second muffler connected to the outlet side of the second self-operated pressure reducing valve.

3. The multi-channel adjustable jet system according to claim 1, characterized in that: It also includes a bypass flow channel, one end of which is connected to the inlet side of the second control valve, and the other end is connected to the outlet side of the second self-operated pressure reducing valve, and a safety valve is arranged on the bypass flow channel.

4. The multi-channel adjustable jet system according to claim 1, characterized in that: The flow meter is a medium flow meter.

5. The multi-channel adjustable jet system according to claim 1, characterized in that: The pipeline heater is a superheating heater.

6. The multi-channel adjustable jet system according to claim 1, characterized in that: The second control valve is a pressure control valve.

7. The multi-channel adjustable jet system according to claim 1, characterized in that: The first control valve is a pressure and flow control valve.

8. A method of regulation, characterized in that: The multi-channel adjustable jet system according to any one of claims 1 to 7 comprises the following steps: Step S1, presetting the jet target value and the adjustment logic information between the jet adjustment component and the exhaust adjustment component in the control module part of the multi-channel adjustable jet system; Step S2, initial adjustment: open the gas source, form a partial pipe resistance load through the first self-operated pressure reducing valve in the jet adjustment assembly, and when the pipe resistance load initially approaches the jet target value interval specified by each jet flow channel, adjust the first regulating valve again to make the jet parameter value meet the specified target value required by the test; Step S3, closed-loop adjustment: After step S2 is completed, when the test state needs to be changed to adjust the target value, the multi-channel adjustable jet system performs real-time closed-loop control adjustment according to the adjustment logic information preset in step S1, so that the jet parameter value in the jet flow channel follows the target value in real time; Step S4: When the multi-channel adjustable jet system is in low-load operation, the excess gas generated by the gas source is discharged through the exhaust channel.

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