An iced tunnel spray rake structure and method of use

Abstract

The application provides an icing wind tunnel spray rake structure and a use method thereof, and belongs to the technical field of icing wind tunnel tests. The spray rake structure comprises a rake body, the rake body is provided with a plurality of nozzle mounting positions; a nozzle is mounted on the nozzle mounting position; a pipeline assembly comprises two independent water supply pipelines and two independent gas supply pipelines; a plurality of on-off control members, each nozzle mounting position is provided with four on-off control members; a current-conducting member, the current-conducting member has a plurality of communication input ends and an output end, each input end is communicated with one of the pipelines of the pipeline assembly through one on-off control member, and the output end is communicated with the nozzle. The four on-off control members and the nozzle configuration adjustment can quickly switch between supercooled water icing cloud and supercooled large water droplet icing cloud, the spray rake body does not need to be replaced, the large-diameter nozzles do not need to occupy the nozzle mounting positions, all the nozzles can be installed with small-diameter nozzles, and the uniformity of the supercooled water icing cloud is improved.

Description

Technical Field

[0001] This invention relates to the field of icing wind tunnel testing technology, specifically to an icing wind tunnel spray rake structure and its usage method. Background Technology

[0002] In the fields of aerospace and meteorological research, icing wind tunnels are core facilities for studying aircraft icing characteristics. In order to realistically simulate complex weather conditions in nature, the spray system must be able to generate two key test environments: one is supercooled water icing clouds with small average particle size, and the other is supercooled large water droplet icing clouds containing large droplets.

[0003] Currently, a spray rake structure is generally used, which alternates between small-diameter nozzles and large-diameter nozzles. When it is necessary to form supercooled water icing clouds, the large-diameter nozzles are turned off, and only the small-diameter nozzles are used; when it is necessary to form supercooled large water droplet icing clouds, both types of nozzles are used simultaneously to form icing clouds. However, in small-sized icing wind tunnels, when forming small-diameter icing clouds, the presence of the large-diameter nozzles results in a large distance between the two small-diameter nozzles, leading to poor uniformity of the icing clouds. Summary of the Invention

[0004] The purpose of this application is to provide an icing wind tunnel spray rake structure and its usage method, thereby solving the aforementioned technical problems existing in the prior art.

[0005] This application is implemented as follows: In a first aspect, embodiments of this application provide an icing wind tunnel spray rake structure, including a rake body with multiple nozzle mounting positions; nozzles mounted at the nozzle mounting positions; a pipeline assembly including two independent water supply pipelines and two independent air supply pipelines; multiple on / off control components, with four on / off control components corresponding to each nozzle mounting position; and a manifold having a connected input end and an output end, with multiple input ends, each input end being connected to one of the pipelines in the pipeline assembly through an on / off control component, and the output end being connected to the nozzle.

[0006] Secondly, this application provides a method for using an icing wind tunnel spray rake structure. Using the spray rake structure provided in the first aspect embodiment, the method includes the following steps: installing nozzles of the corresponding specifications at the nozzle mounting positions; independently controlling the on / off control components of each nozzle mounting position to selectively introduce the corresponding medium into the manifold; adjusting the pressure of the water supply pipeline or air supply pipeline connected to the nozzles; starting the nozzles; and obtaining a mixed cloud with a preset particle size distribution.

[0007] The technical solution provided in this application can achieve the following beneficial effects: In this application, there are multiple nozzle mounting positions. Each nozzle mounting position can selectively install either large-diameter or small-diameter nozzles according to actual needs. The cooperation of four pipelines and on / off control components ensures that each nozzle can operate normally. There is no need to reserve a nozzle mounting position for a large-diameter nozzle. All nozzles can be installed with small-diameter nozzles, avoiding excessive spacing between small-diameter nozzles and significantly improving the uniformity of supercooled water icing mist. Furthermore, each nozzle mounting position is equipped with four on / off control components, each corresponding to one of the pipeline components. By adjusting the four on / off control components and the nozzle configuration, the switching between supercooled water icing mist and supercooled large water droplet icing mist can be quickly achieved without replacing the spray rake body, simplifying operation and improving test efficiency. In addition, the two water supply pipelines and two air supply pipelines are independent of each other. The on / off control components can control the on / off of the corresponding pipelines, realizing independent switching of water and air sources. In addition, the water pressure and air pressure can be flexibly set in both modes to adapt to the working requirements of different nozzles, ensuring the stability of mist generation and adapting to various working conditions, with high compatibility across multiple working conditions. Attached Figure Description

[0008] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments of the present invention or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0009] Figure 1 This is a schematic diagram of the overall structure of the spray rake structure provided in some embodiments of this application. Figure 1 ; Figure 2 This is a schematic diagram of the overall structure of the spray rake structure provided in some embodiments of this application. Figure 2 ; Figure 3 This is a cross-sectional view of a bus provided in some embodiments of this application.

[0010] In the diagram: 100-rake body, 200-nozzle, 310-water supply pipeline, 320-air supply pipeline, 400-on / off control component, 500-manifold component, 510-water confluence channel, 520-air confluence channel, 530-buffer equalization chamber. Detailed Implementation

[0011] The following description provides many different embodiments or examples for implementing various features of the invention. The elements and arrangements described in the specific examples below are only for concise expression of the invention and are merely examples, not intended to limit the invention.

[0012] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be described in detail below. Obviously, the described embodiments are merely some embodiments of this invention, and not all embodiments. Based on the embodiments of this invention, all other implementation methods obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0013] This application provides an embodiment of an icing wind tunnel spray rake structure, which can be referred to as follows. Figure 1 and Figure 2 As shown, the system includes a rake body 100, nozzles 200, piping assembly, on / off control components 400, and a manifold 500. The rake body 100 is the main structure of the spray rake, and it has multiple nozzle mounting positions where the nozzles 200 are installed. "Nozzle 200" is a general term; in actual use, large-diameter or small-diameter nozzles can be selected for installation at these positions according to specific needs. The piping assembly includes two independent water supply lines 310 and two independent air supply lines 320. These four lines are independent, and the media they transport do not affect each other. There are multiple on / off control components 400, with four on / off control components 400 corresponding to each nozzle mounting position. The manifold 500 has connected input and output ends. There are multiple input ends, each connected to one of the pipes in the piping assembly via an on / off control component 400. The output end is connected to the nozzle 200.

[0014] The medium transported in the pipeline assembly can enter the manifold 500 through its input end and then enter the nozzle 200 through its output end, facilitating the normal operation of the nozzle 200. The on / off control unit 400 can control whether the medium can flow into the manifold 500 by opening or closing it.

[0015] In the embodiments provided in this application, there are multiple nozzle mounting positions. Each nozzle mounting position can selectively install large-diameter nozzles or small-diameter nozzles according to actual needs. The cooperation of four pipelines and on / off control components 400 ensures that each nozzle 200 can operate normally. The spray rake as a whole does not need to retain large-diameter nozzles occupying nozzle mounting positions. All nozzles 200 can be equipped with small-diameter nozzles, thereby avoiding excessive spacing between small-diameter nozzles and significantly improving the uniformity of the supercooled water freezing cloud.

[0016] Furthermore, each nozzle mounting position is equipped with four on / off control components 400, each corresponding to one of the pipelines in the pipeline assembly. By adjusting the configuration of the four on / off control components 400 and the nozzle 200, the supercooled water freezing cloud and supercooled large water droplet freezing cloud can be quickly switched without replacing the spray rake body, simplifying operation and improving efficiency.

[0017] In addition, the two water supply lines 310 and the two gas supply lines 320 are independent of each other. The on / off control unit 400 can control the on / off of the corresponding lines, realize independent switching of water and gas sources, and the water pressure and gas pressure can be flexibly set in both modes to adapt to the working requirements of different nozzles 200, ensure the stability of cloud and fog generation, and adapt to various working conditions, with high compatibility with multiple working conditions.

[0018] The nozzle 200 is detachably connected to the nozzle mounting position, allowing the operator to quickly change the type of nozzle 200. Preferably, a positioning structure can be provided between the nozzle 200 and the nozzle mounting position to prevent the nozzle 200 from rotating relative to the nozzle mounting position, forcibly locking the spray angle of the nozzle 200, eliminating angular deviations caused by manual replacement of the nozzle 200, and ensuring the consistency of the array fog field.

[0019] The on / off control element 400 can be a miniature switching valve, which independently switches the water / gas supply source and controls the start / stop of the nozzle 200 by opening and closing the miniature switching valve. When the on / off control element 400 is open, the pipeline and the manifold 500 are connected, and the medium in the pipeline is delivered to the manifold 500 and then to the nozzle 200; when the on / off control element 400 is closed, the pipeline and the manifold 500 are cut off, and no medium is delivered. The four on / off control elements 400 can control whether four pipelines are connected to the manifold 500 and whether the medium in the pipeline is delivered to the nozzle 200.

[0020] This application embodiment also provides a method of using an icing wind tunnel spray rake structure. The specific method of using the spray rake structure provided in the above embodiment includes the following steps: Install the corresponding nozzle 200 at the nozzle mounting position. First, determine the type of cloud or mist to be generated, and then install the corresponding nozzle 200. After the nozzle 200 is installed, proceed to the next step.

[0021] The on / off control element 400 of each nozzle mounting position independently controls the selective introduction of the corresponding medium into the manifold 500. For nozzles 200 of different specifications, the on / off control elements 400 of different pipelines in the connecting pipeline assembly selectively open and close, thereby controlling whether the medium in the corresponding pipeline can flow into the manifold 500 and thus into the nozzle 200. Even if different specifications of nozzles 200 are installed on the spray rake, only the on / off control element 400 needs to be controlled to introduce the appropriate medium into the nozzle 200, ensuring the normal operation of the nozzle 200.

[0022] Adjust the pressure of the water supply line 310 or the air supply line 320 connected to the nozzle 200, start the nozzle 200, and obtain a mixed cloud with a preset particle size distribution. Determine the pressure of the water supply line 310 and the air supply line 320 according to the required cloud, and deliver the medium at the appropriate pressure to the corresponding nozzle 200, thereby obtaining a mixed cloud with a preset particle size distribution.

[0023] In some specific embodiments, the nozzle 200 includes a small-diameter nozzle and a large-diameter nozzle, and either the small-diameter nozzle or the large-diameter nozzle can be detachably installed at any nozzle mounting position.

[0024] Small-diameter nozzles refer to atomizing nozzles 200 that can atomize water supply into a cloud of supercooled water droplets with small and uniform particle size under icing wind tunnel spraying conditions. The nozzles spray out droplets with small particle size and are mainly used to form supercooled water icing clouds that meet the requirements of conventional icing tests.

[0025] Large-diameter nozzles refer to atomizing nozzles 200 that, under the same spraying conditions, produce droplet sizes that are significantly larger than those produced by small-diameter nozzles. They are mainly used in conjunction with small-diameter nozzles to jointly form supercooled large-droplet icing clouds that meet the requirements of large-droplet icing tests.

[0026] Depending on the type of nozzle 200 installed in the spray rake structure, the spray rake has two working modes: supercooled water mode and supercooled large water droplet mode.

[0027] With the spray rake structure in subcooled water mode, small-diameter nozzles are installed at each nozzle mounting position.

[0028] When the spray rake structure is in supercooled large droplet mode, every three adjacent nozzle mounting positions form a group, and the three nozzle mounting positions in the same group alternately install small-diameter nozzles and large-diameter nozzles. This can be either a small-diameter nozzle in the middle with large-diameter nozzles on both sides, or a large-diameter nozzle in the middle with small-diameter nozzles on both sides. For vertical / horizontal rows of nozzle mounting positions, the pattern of small-diameter nozzles in the middle and large-diameter nozzles in the middle can alternate.

[0029] When the spray rake structure is in subcooled water mode, all nozzles installed on the spray rake are small-diameter nozzles. In actual use of the spray rake structure, among the four on / off control components 400 corresponding to each nozzle mounting position, one on / off control component 400 connected to the water supply line 310 is open, and the other on / off control component 400 is closed; one on / off control component 400 connected to the air supply line 320 is open, and the other on / off control component 400 is closed. That is, each nozzle 200 is only connected to one water supply line 310 and one air supply line 320, and is disconnected from the remaining water supply line 310 and air supply line 320.

[0030] Alternatively, all four on / off control elements 400 are turned on, and the corresponding nozzle 200 at the nozzle mounting position is connected to all four pipes in the pipe assembly. At the same time, the pressure of the two water supply pipes 310 is the same, and the pressure of the two air supply pipes 320 is the same. In this way, when one water supply pipe 320 fails during the cloud and fog generation process, the other water supply pipe 320 can be quickly used as a replacement.

[0031] The spray rake structure provided in this application embodiment has a flexible working mode and can adapt to different working conditions. Specifically, depending on the site conditions, separate water supply pipeline 310 and air supply pipeline 320 can be selected for independent water and air supply, or two water supply pipelines 310 and two air supply pipelines 320 can be selected for coordinated water and air supply under the same pressure. This improves the adaptability and flexibility of the spray system while ensuring the uniformity of the fog.

[0032] The two water supply lines 310 and the two air supply lines 320 can operate independently. If one of the water supply lines 310 or the air supply line 320 fails, the system can quickly switch to the other line to maintain spraying operations, avoiding test termination due to a single line failure. This ensures continuous and stable operation of the icing wind tunnel test, significantly improving system reliability. Moreover, the coordinated operation of the two lines under the same pressure enhances spray stability. When the water pressure of the two water supply lines 310 and the air pressure of the two air supply lines 320 are kept consistent, synchronous water and air supply can be achieved, further improving the flow rate stability and cloud uniformity of the small-diameter spray, meeting the high-precision test requirements for supercooled water icing clouds.

[0033] When the spray rake structure is in the supercooled large droplet mode, large-diameter nozzles and small-diameter nozzles are installed on the spray rake. Every three adjacent nozzle installation positions form a group, and small-diameter nozzles and large-diameter nozzles are alternately installed in the three nozzle installation positions in the same group.

[0034] The on / off control 400 connecting the large-diameter nozzle to one of the water supply lines 310 and the air supply line 320 is open, while the other on / off control 400s connected to the large-diameter nozzle are closed. Medium is supplied to the large-diameter nozzle only through the open on / off control 400. Similarly, the on / off control 400 connecting the small-diameter nozzle to the other air supply line 320 and the water supply line 310 is open, while the other on / off control 400s connected to the small-diameter nozzle are closed. Medium is supplied to the small-diameter nozzle only through the open on / off control 400.

[0035] The large-diameter nozzle is connected to one of the water supply lines 310 and 320, while the small-diameter nozzle is connected to the other two water supply lines 310 and 320. The water supply lines 310 and 320 corresponding to the two types of nozzles 200 can be controlled independently. By setting different water and air pressures, the optimal working pressures for the small-diameter and large-diameter nozzles can be matched respectively, ensuring that both types of nozzles 200 are in an ideal atomization state and improving the generation quality of supercooled large water droplet icing fog.

[0036] Furthermore, the small-diameter nozzle and the large-diameter nozzle are controlled independently in separate zones without interfering with each other. The water supply pipeline 310 and the air supply pipeline 320 corresponding to the small-diameter nozzle and the large-diameter nozzle are different and independent of each other, which can stably achieve the coordinated spraying of clouds and fog of the two particle sizes and meet the particle size ratio requirements of supercooled large water droplet freezing clouds and fog.

[0037] Furthermore, when switching to the supercooled large droplet mode, there is no need to replace the spray rake body or rearrange the pipeline. Simply by alternately installing the nozzles 200 and adjusting the on / off control component 400, supercooled large droplet icing clouds that meet the test standards can be quickly formed. The test switching efficiency is high and the applicability is strong. By using dual independent main supply pipelines, the drawback of the traditional structure where nozzles of different sizes 200 must share a set of pressure parameters is solved. This achieves asymmetric pressure control of nozzles 200 with different particle sizes in the same space, greatly improving the realism of complex meteorological environment simulation.

[0038] In some preferred embodiments of this application, in the spray rake structure, the manifold 500 includes independent water confluence channel 510 and air confluence channel 520, as can be referred to Figure 3 As shown, the water confluence channel 510 is connected to the two input ends of the two water supply pipes 310, the gas confluence channel 520 is connected to the two input ends of the two gas supply pipes 320, and the water confluence channel 510 and the gas confluence channel 520 are each connected to one of the output ends.

[0039] Two water supply pipelines 310 are connected to the water confluence channel 510, and two gas supply pipelines 320 are connected to the gas confluence channel 520. The two water supply pipelines and two gas supply pipelines are concentrated and converged in their respective confluence channels, simplifying the fluid transport path and achieving a high degree of structural integration. Furthermore, it effectively prevents high-pressure gas from flowing back into the water system, ensuring the stability of the pressure of each medium.

[0040] In some preferred embodiments, reference Figure 3As shown, both the water confluence channel 510 and the gas confluence channel 520 include a buffer equalization chamber 530. The buffer equalization chamber 530 is located on the input path of its corresponding two input ends, and the flow cross-sectional area of ​​the buffer equalization chamber 530 is larger than the flow cross-sectional area of ​​other areas of its corresponding gas confluence channel 520 or water confluence channel 510. That is, for the water confluence channel 510, water medium enters the water confluence channel 510 from its input end, the water from the two input ends merges through the buffer equalization chamber 530, and finally exits from the output end. For the gas confluence channel 520, gas medium enters the gas confluence channel 520 from its input end, the gas from the two input ends merges through the buffer equalization chamber 530, and finally exits from the output end.

[0041] The design of the buffer equalization chamber 530 effectively absorbs the fluid shock and pressure pulsation generated by the on / off control component 400 and the miniature solenoid valve at the moment of opening / closing by increasing the local flow cross-sectional area. This ensures that the spray particle size will not change drastically during the switching process and that the spray will not splash or drip at the moment of switching.

[0042] In some embodiments, the water supply pipeline 310 and the gas supply pipeline 320 are arranged side by side, and the on / off control component 400 is installed perpendicular to the axis of either the water supply pipeline 310 or the gas supply pipeline 320. The on / off control component 400 connected to the water supply pipeline 310 is perpendicular to the axis of the water supply pipeline 310, and the on / off control component 400 connected to the gas supply pipeline 320 is perpendicular to the axis of the gas supply pipeline 320. The side-by-side arrangement of the pipelines improves space utilization and facilitates wiring layout.

[0043] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0044] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in the present invention should be included within the scope of protection of the present invention.

Claims

1. A spray rake structure for an icing wind tunnel, characterized in that, include: The rake body (100) is provided with multiple nozzle mounting positions; A nozzle (200) is mounted at the nozzle mounting position; Piping assembly, the piping assembly including two independent water supply pipes (310) and two gas supply pipes (320). Multiple on / off control elements (400), with four on / off control elements (400) corresponding to each of the nozzle mounting positions. A manifold (500) has a connected input end and an output end. There are multiple input ends, each of which is connected to one of the pipelines in the pipeline assembly through an on / off control element (400). The output end is connected to the nozzle (200). The manifold (500) includes an independent water confluence channel (510) and a gas confluence channel (520). The water confluence channel (510) is connected to the two input ends of the two water supply pipelines (310), the gas confluence channel (520) is connected to the two input ends of the two gas supply pipelines (320), and the water confluence channel (510) and the gas confluence channel (520) are each connected to one of the output ends. The nozzle (200) includes a small-diameter nozzle and a large-diameter nozzle, and either the small-diameter nozzle or the large-diameter nozzle can be detachably installed at any of the nozzle mounting positions.

2. The icing wind tunnel spray rake structure according to claim 1, characterized in that, Both the water confluence channel (510) and the gas confluence channel (520) include a buffer equalization chamber (530). The buffer equalization chamber (530) is located on the input path of its two corresponding input ends. The flow cross-sectional area of ​​the buffer equalization chamber (530) is larger than the flow cross-sectional area of ​​other areas of its corresponding gas confluence channel (520) or water confluence channel (510).

3. The icing wind tunnel spray rake structure according to claim 1, characterized in that, The water supply pipeline (310) and the gas supply pipeline (320) are arranged side by side, and the on / off control component (400) is installed perpendicular to the axial direction of the water supply pipeline (310) or the gas supply pipeline (320).

4. The icing wind tunnel spray rake structure according to claim 1, characterized in that, The spray rake structure has a subcooled water mode, and each of the nozzle mounting positions is equipped with a small-diameter nozzle.

5. The icing wind tunnel spray rake structure according to claim 1, characterized in that, The spray rake structure has a supercooled large water droplet mode. Each group of three adjacent nozzle mounting positions is a set, and the small-diameter nozzle and the large-diameter nozzle are alternately installed in the three nozzle mounting positions in the same group.

6. A method of using an icing wind tunnel spray rake structure, characterized in that, The method of using the spray rake structure according to any one of claims 1-5 includes the following steps: Install the nozzle of the corresponding specification (200) at the nozzle mounting position. Independent on / off control unit (400) for each nozzle mounting position to selectively introduce the corresponding medium into the manifold (500). Adjust the pressure of the water supply pipeline (310) or air supply pipeline (320) connected to the nozzle (200), start the nozzle (200), and obtain a mixed cloud with a preset particle size distribution.

7. The method of using the icing wind tunnel spray rake structure according to claim 6, characterized in that, When the spray rake structure is in subcooled water mode, small-diameter nozzles are installed at each nozzle mounting position. Among the four on / off control components (400) corresponding to each nozzle mounting position, one of the on / off control components (400) connected to the water supply pipeline (310) is open and the other on / off control component (400) is closed. One of the on / off control components (400) connected to the air supply pipeline (320) is open and the other on / off control component (400) is closed, or all four on / off control components (400) are open. The pressure of the two water supply pipelines (310) is the same, and the pressure of the two air supply pipelines (320) is the same.

8. The method of using the icing wind tunnel spray rake structure according to claim 6, characterized in that, When the spray rake structure is in the supercooled large droplet mode, each group of three adjacent nozzle mounting positions is a group, and small-diameter nozzles and large-diameter nozzles are alternately installed in the three nozzle mounting positions in the same group. The on / off control (400) connected to one of the air supply lines (320) and the water supply line (310) of the large-diameter nozzle is turned on, and the other on / off control (400) connected to the large-diameter nozzle is turned off. The on / off control (400) connected to the other air supply line (320) and the water supply line (310) of the small-diameter nozzle is turned on, and the other on / off control (400) connected to the small-diameter nozzle is turned off.

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