Modularized experiment equipment for wind tunnel wind ice experiment and use method thereof

Abstract

The invention belongs to the technical field of wind tunnel experiments, and particularly relates to modular experiment equipment for a wind tunnel wind ice experiment and a use method of the modular experiment equipment. The equipment comprises a basic module and a disassembly-assembly module, and power supply modules and a plurality of uniformly arranged spraying systems are arranged in the basic module and the disassembly-assembly module. The base modules are arranged on the two sides of the disassembly-assembly module, one base module is provided with a liquid nitrogen conveying pipeline and a liquid nitrogen storage chamber which are connected, the other base module is provided with a cooling water storage chamber and a cooling water conveying pipeline which are connected, and the outer layer of the liquid nitrogen conveying pipeline and the outer layer of the cooling water conveying pipeline are each provided with a thermal resistance layer. According to the invention, the dismounting-assembling module enables the experimental equipment to adapt to reduced scale models of different sizes; wherein the spraying system adopts a multi-nozzle and multi-angle spraying mode, so that liquid nitrogen and cooling water can cover the surface of the experimental model more uniformly; the equipment can control the spraying angle, flow and pressure in the using process, and different freezing effects can be simulated.

Description

Technical Field

[0001] The present invention relates to the technical field of wind tunnel experiments, and in particular to a modular experimental device for wind tunnel wind-ice experiments and a method for using the device. Background Art

[0002] Currently, the sizes of scale models used in wind tunnel tests are becoming increasingly diverse. Different research projects and testing requirements often require scale models of varying sizes. For example, experiments such as studying the icing characteristics of aircraft wings and analyzing the mechanical properties of power transmission lines under icing conditions have vastly different requirements for scale models. Traditional icing wind tunnels, with their relatively fixed wind field structures and experimental space, are difficult to flexibly adapt to the experimental requirements of models of varying sizes.

[0003] Chinese invention patent CN118090121A (publication date: May 28, 2024) discloses a large-scale icing wind tunnel. The invention is easy to operate, can significantly shorten the module replacement time, and effectively improve the efficiency and safety of wind tunnel tests. Chinese invention patent CN117782509A (publication date: March 29, 2024) discloses a fixed component of a replaceable test device for an icing wind tunnel. The invention can change the wind speed by replacing different mobile retractable pipes, meeting the demand for a larger wind speed control range, and can effectively ensure the structural stability and safety of the icing wind tunnel test device at high wind speeds. Although the above patents can replace some modules in the equipment, they do not solve the problem of adapting to scaled models of wind tunnel tests of different sizes.

[0004] Therefore, those skilled in the art urgently need to develop an icing test equipment that can flexibly adapt to wind tunnel test scale models of different sizes. Summary of the Invention

[0005] This application proposes a modular experimental device for wind tunnel wind-ice experiments and its use method. This device can adapt to experimental scale models of different sizes, effectively improving the adaptability and accuracy of wind tunnel experiments. The specific technical solution is described below.

[0006] A modular experimental device for wind tunnel wind-ice experiments includes two basic modules and a disassembly-assembly module. The basic modules are arranged on either side of the disassembly-assembly module. The disassembly-assembly module, as the core innovative part of the device, undertakes the key task of adapting to scale models of different sizes in wind tunnel experiments. It can be flexibly assembled and disassembled according to experimental requirements, thereby providing suitable experimental space for models of different sizes and greatly enhancing the versatility of the device.

[0007] Furthermore, one of the basic modules is provided with a connected liquid nitrogen transport pipeline and a liquid nitrogen storage chamber, and the other basic module is provided with a connected cooling water storage chamber and a cooling water transport pipeline. Each of the basic modules is provided with a number of evenly arranged spray systems, and the spray systems are connected to the liquid nitrogen transport pipeline or the cooling water transport pipeline. The liquid nitrogen storage chamber is used to store sufficient liquid nitrogen, and the liquid nitrogen transport pipeline is used to accurately transport the liquid nitrogen to the corresponding spray systems to provide the necessary low-temperature medium for simulating the low-temperature freezing environment. The cooling water storage chamber stores cooling water, and the cooling water transport pipeline is used to transport the cooling water to the corresponding spray systems to form an initial water film on the surface of the experimental model, which interacts with the liquid nitrogen to realize the freezing process. Each of the basic modules is provided with a power supply module to provide power support for the basic module.

[0008] Furthermore, a power supply module is provided inside the disassembly-assembly module, and a circuit connection port is provided at the connection portion between the disassembly-assembly module and the basic module to ensure the overall power supply of the device.

[0009] Furthermore, each of the spray systems includes a shunt pipe, a controllable pressure spray head and a movable connection module; the shunt pipe and the controllable pressure spray head are connected via the movable connection module.

[0010] Furthermore, the controllable pressure spray head adopts a large-aperture nozzle and a multi-stage diversion hole design to prevent the liquid nitrogen from clogging the spray hole due to increased viscosity or ice crystals formed by impurities at low temperatures.

[0011] Furthermore, the diversion pipe is directly connected to the liquid nitrogen transport pipeline or the cooling water transport pipeline through a flange.

[0012] Furthermore, each of the diversion pipes is connected to a plurality of pressure-controllable sprinkler heads.

[0013] Furthermore, a thermal resistance layer is provided on the outside of the liquid nitrogen transport pipeline and the cooling water transport pipeline to ensure that the liquid nitrogen transport pipeline or the cooling water transport pipeline is not frozen and blocked during the experiment.

[0014] Furthermore, a delivery pipeline is provided in the disassembly-assembly module, and the delivery pipeline is connected to the liquid nitrogen delivery pipeline and the cooling water delivery pipeline through a flange.

[0015] Furthermore, the disassembly-assembly module is further provided with a plurality of spray systems connected to the delivery pipeline.

[0016] Furthermore, an adaptive module is provided in the movable connection module for changing the spray angle of the controllable pressure sprinkler head.

[0017] Furthermore, switches are provided on the liquid nitrogen transport pipeline and the cooling water transport pipeline.

[0018] A method for using a modular experimental device for a wind tunnel wind-ice experiment comprises the following steps:

[0019] Step S1: Assemble the experimental module according to the size of the experimental model;

[0020] Step S2: starting the cooling water transport pipeline and the spraying system connected thereto to spray cooling water mist onto the surface of the experimental model to form a water film;

[0021] Step S3: Start the liquid nitrogen transport pipeline and the spray system connected to it. Under the action of the wind field in the wind tunnel laboratory, the liquid nitrogen mist and the cooling water mist are fully combined to generate heat exchange. The wind field carries away the heat, causing the model to freeze during the wind tunnel experiment.

[0022] Furthermore, step S1 is specifically as follows: before conducting the wind tunnel wind-ice experiment, the experimenter needs to select and assemble appropriate experimental modules according to the specific size of the experimental model, and strictly and standardizedly connect the modules to ensure that the connection between the liquid nitrogen transport pipeline, the cooling water transport pipeline and the delivery pipeline is tight and leak-free, and at the same time ensure that the spray system is installed in place and the components are firmly connected.

[0023] Furthermore, step S2 specifically involves activating the cooling water delivery pipeline and the associated spray system after the experimental module is assembled. Under the influence of pipeline pressure, the cooling water is distributed through the diversion pipe to each pressure-controlled spray nozzle, spraying it evenly onto the experimental model surface in the form of a mist. As the spraying process continues, the cooling water mist gradually converges on the model surface, forming a uniform water film.

[0024] Furthermore, step S3 specifically includes: after a water film forms on the surface of the experimental model, activating the liquid nitrogen transport pipeline and the spray system connected thereto. Liquid nitrogen flows within the pipeline, is distributed through a shunt pipe to a controllable pressure spray head, and is sprayed out in the form of water mist. Under the influence of the wind field within the wind tunnel laboratory, the liquid nitrogen mist and the cooling water mist are fully mixed, and heat exchange rapidly occurs between the two. Due to the extremely low temperature of liquid nitrogen, the heat in the cooling water mist is absorbed by the liquid nitrogen, causing the temperature to drop sharply, gradually freezing the water film on the surface of the model into ice. This process not only promotes the full mixing of the liquid nitrogen mist and the cooling water mist, but also promptly removes the heat generated during the heat exchange process, maintaining the stability of the experimental environment and ensuring that the model can freeze as expected.

[0025] When the equipment is in use, the spray angle of the controllable pressure sprinkler head can be adjusted in real time during the freezing process according to the progress of the experiment, so that the liquid nitrogen and cooling water can always evenly cover the surface of the experimental model; secondly, by energizing the thermal resistor layer, the transport pipeline can be prevented from being blocked by ice during the experiment; at the same time, the experimenter can also adjust the controllable pressure sprinkler head and the movable connection module according to the experimental needs, flexibly changing the spray angle, flow rate and pressure to simulate different freezing effects, such as different freezing rates, ice layer growth forms, etc.

[0026] Compared with the existing technology, the advantages and effects of this application are as follows:

[0027] 1. The disassembly-assembly module of the present application can be assembled with appropriate experimental modules as needed, so that the experimental equipment can adapt to scaled models of different sizes, meet various experimental conditions, and improve the versatility of the equipment.

[0028] 2. The spray system of this application adopts a multi-nozzle, multi-angle spraying method, so that liquid nitrogen and cooling water can cover the surface of the experimental model more evenly; at the same time, by controlling the spray angle, spray flow, and pressure, different freezing effects are simulated, so that the growth morphology and freezing rate of the ice layer in the experiment are closer to the actual situation, providing more valuable reference data for freezing research.

[0029] 3. In this application, a thermal resistance layer is set on the outside of the liquid nitrogen transport pipeline and the cooling water transport pipeline to prevent the liquid nitrogen transport pipeline or the cooling water transport pipeline from being frozen and blocked during the experiment.

[0030] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application so that it can be implemented in accordance with the contents of the specification, and to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the following is a detailed description of the preferred embodiment of the present application in conjunction with the accompanying drawings.

[0031] Based on the detailed description of the specific embodiments of the present application in conjunction with the accompanying drawings below, those skilled in the art will become more aware of the above and other objects, advantages and features of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following is a brief introduction to the drawings required for the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present application. For those skilled in the art, other drawings can also be obtained based on these drawings without inventive work. In all drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn according to the actual scale.

[0033] in:

[0034] Figure 1 It is a front view of a modular experimental device for wind tunnel wind-ice experiments provided by the present application;

[0035] Figure 2 It is a rear view of a modular experimental device for wind tunnel wind-ice experiments provided by the present application;

[0036] Figure 3 It is a three-dimensional schematic diagram of a modular experimental device for wind tunnel wind-ice experiments provided by the present application;

[0037] Figure 4 This is a schematic diagram of a spray system of a modular experimental equipment for wind tunnel wind-ice experiments provided by this application.

[0038] Among them: 1. Basic module; 2. Liquid nitrogen transport pipeline; 3. Liquid nitrogen storage room; 4. Diversion pipe; 5. Controllable pressure sprinkler head; 6. Disassembly-assembly module; 7. Cooling water storage room; 8. Cooling water transport pipeline; 9. Active connection module; 10. Thermal resistor layer; 11. Power supply module. DETAILED DESCRIPTION

[0039] In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all of the embodiments. In the following description, specific details such as specific configurations and components are provided only to help fully understand the embodiments of the present application. Therefore, it should be clear to those skilled in the art that various changes and modifications can be made to the embodiments described herein without departing from the scope and spirit of the present application. In addition, for clarity and brevity, the description of known functions and structures has been omitted in the embodiments.

[0040] It should be understood that references throughout this specification to "one embodiment" or "this embodiment" mean that a particular feature, structure, or characteristic associated with the embodiment is included in at least one embodiment of the present application. Therefore, the appearance of "one embodiment" or "this embodiment" throughout this specification does not necessarily refer to the same embodiment. Furthermore, these particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

[0041] In addition, the present application may repeat reference numerals and / or letters in different examples. This repetition is for the purpose of simplicity and clarity and does not in itself indicate the relationship between the various embodiments and / or settings discussed.

[0042] The term "and / or" in this article is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can mean: A exists alone, B exists alone, and A and B exist at the same time. The term " / and" in this article describes another type of association object relationship, indicating that there can be two relationships. For example, A / and B can mean: A exists alone, and A and B exist alone. In addition, the character " / " in this article generally indicates that the related objects before and after are in an "or" relationship.

[0043] The term "at least one" in this article is merely a description of the association relationship between associated objects, indicating that three relationships may exist. For example, at least one of A and B can mean: A exists alone, A and B exist at the same time, and B exists alone.

[0044] It should also be noted that, in this document, relational terms such as first and second are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "include," "comprises," or any other variations thereof are intended to cover non-exclusive inclusion.

[0045] Example 1

[0046] This embodiment introduces a modular experimental device for wind tunnel wind ice experiment. Figure 1 , see the rear view Figure 2 , see the stereogram Figure 3 The device includes a basic module 1 and a disassembly-assembly module 6. There are two basic modules 1, which are respectively arranged on both sides of the disassembly-assembly module 6. The disassembly-assembly module 6 is used to adapt to scale models of different sizes in wind tunnel experiments.

[0047] Preferably, one of the basic modules 1 is provided with a connected liquid nitrogen transport pipeline 2 and a liquid nitrogen storage chamber 3, and the other basic module 1 is provided with a connected cooling water storage chamber 7 and a cooling water transport pipeline 8, and each of the basic modules 1 is provided with a plurality of evenly arranged spray systems, and the spray systems are connected to the liquid nitrogen transport pipeline 2 or the cooling water transport pipeline 8, and a thermal resistor layer 10 is provided on the outside of the liquid nitrogen transport pipeline 2 or the cooling water transport pipeline 8, and a power supply module 11 is provided inside the basic module.

[0048] Preferably, a delivery pipeline is provided in the disassembly-assembly module 6 , and the delivery pipeline is connected to the liquid nitrogen delivery pipeline 2 and the cooling water delivery pipeline 8 through a flange.

[0049] Preferably, the disassembly-assembly module 6 is further provided with a power supply module 11 and several spray systems connected to the delivery pipelines.

[0050] Preferably, switches are provided on the liquid nitrogen transport pipeline 2 and the cooling water transport pipeline 8.

[0051] In this embodiment, the basic module 1 on the left side of the disassembly-assembly module 6 transports liquid nitrogen from left to right and sprays liquid nitrogen mist, and the basic module 1 on the right side transports cooling water from right to left and sprays cooling water mist.

[0052] The technical effects achieved by this embodiment are as follows: by providing a disassembly-assembly module, this embodiment can assemble appropriate experimental modules as needed, so that the experimental equipment can adapt to scaled models of different sizes to meet various experimental conditions; the flange connection method has the characteristics of good sealing and convenient disassembly and assembly, which can effectively prevent liquid leakage and facilitate equipment maintenance and inspection; this embodiment also provides a thermal resistance layer for power-on heating, which can ensure that the transportation pipeline will not be blocked by ice.

[0053] Example 2

[0054] Based on Example 1, this example further introduces a spray system for a modular experimental device for wind tunnel wind ice experiment. Figure 4 .

[0055] Preferably, each of the spray systems includes a shunt pipe 4 , a pressure-controlled spray head 5 and a movable connection module 9 ; the shunt pipe 4 and the pressure-controlled spray head 5 are connected via the movable connection module 9 .

[0056] Preferably, the diversion pipe 4 is directly connected to the liquid nitrogen transport pipeline 2 or the cooling water transport pipeline 8 via a flange.

[0057] Preferably, each of the diversion pipes 4 is connected to a plurality of controllable pressure spray heads 5 .

[0058] Preferably, the controllable pressure spray head 5 adopts a large-aperture nozzle and a multi-stage diversion hole design, and is also provided with a control module connected to an external control system, which can control the spray flow and spray pressure to prevent liquid nitrogen from forming ice crystals due to increased viscosity or impurities at low temperatures, thereby clogging the spray hole.

[0059] Preferably, the movable connection module 9 is provided with an adaptive module and a control module connected to an external control system, for changing the spray angle of the controllable pressure sprinkler head 5 .

[0060] The technical effect achieved by this embodiment is as follows: the spray system of this embodiment adopts a multi-nozzle, multi-angle spraying method, so that liquid nitrogen and cooling water can more evenly cover the surface of the experimental model; at the same time, by controlling the spray angle, flow rate, and pressure, different freezing effects can be simulated.

[0061] Example 3

[0062] Based on Examples 1-2, this example further introduces a method for using a modular experimental device for wind tunnel wind-ice experiments:

[0063] Step S1: Assemble the experimental module according to the size of the experimental model;

[0064] Step S2: Start the cooling water transport pipeline 8 and the spraying system connected thereto to spray cooling water mist on the surface of the experimental model to form a water film;

[0065] Step S3: Start the liquid nitrogen transport pipeline 2 and the spray system connected to it. Under the action of the wind field in the wind tunnel laboratory, the liquid nitrogen mist and the cooling water mist are fully combined to generate heat exchange. The wind field takes away the heat, causing the model to freeze during the wind tunnel experiment.

[0066] Preferably, step S1 is specifically as follows: before conducting the wind tunnel wind-ice experiment, the experimenter needs to select and assemble appropriate experimental modules according to the specific size of the experimental model, and strictly and standardizedly connect the modules to ensure that the connection between the liquid nitrogen transport pipeline, the cooling water transport pipeline and the delivery pipeline is tight and leak-free, and at the same time ensure that the spray system is installed in place and the components are firmly connected.

[0067] Preferably, step S2 specifically includes: after completing the assembly of the experimental module, activating the cooling water delivery pipeline and the connected spray system. At this point, the cooling water, under the influence of pipeline pressure, is distributed through the diversion pipe to each pressure-controlled spray nozzle, and evenly sprayed onto the surface of the experimental model in the form of water mist. As the spraying process continues, the cooling water mist gradually converges on the surface of the model, forming a uniform water film.

[0068] Preferably, step S3 specifically includes: after a water film forms on the surface of the experimental model, starting the liquid nitrogen transport pipeline and the spray system connected thereto. The liquid nitrogen flows in the pipeline, is distributed to the controllable pressure spray head through the shunt pipe, and is sprayed out in the form of water mist; under the influence of the wind field in the wind tunnel laboratory, the liquid nitrogen mist and the cooling water mist are fully mixed, and heat exchange occurs rapidly between the two. Due to the extremely low temperature of the liquid nitrogen, the heat in the cooling water mist is absorbed by the liquid nitrogen, and the temperature drops sharply, causing the water film on the surface of the model to gradually freeze into ice. This process not only promotes the full mixing of the liquid nitrogen mist and the cooling water mist, but also promptly removes the heat generated during the heat exchange process, maintaining the stability of the experimental environment and ensuring that the model can be frozen in the expected manner.

[0069] When conducting experiments using the equipment of this embodiment, the adaptive module within the movable connection module 9 will change the connection form of the movable connection module 9 according to the progress of the experiment during the freezing process, thereby changing the spray angle of the controllable pressure spray head 5, so that the liquid nitrogen and cooling water can always evenly cover the surface of the experimental model; the experimenter can also adjust the controllable pressure spray head 5 and the movable connection module 9 in real time by operating the external control system according to the progress of the experiment, flexibly changing the spray angle, flow rate and pressure to simulate different freezing effects, such as different freezing rates, ice layer growth forms, etc.; in addition, by energizing the thermal resistor layer, the transportation pipeline can be prevented from being blocked by ice during the experiment.

[0070] The foregoing description is merely a preferred embodiment of the present invention and does not limit the scope of protection of the present invention. The present invention is susceptible to various modifications and variations. Any changes, modifications, substitutions, integrations, and parameter changes to these embodiments that fall within the spirit and principles of the present invention are within the scope of protection of the claims of the present invention.

Claims

1. A modular experimental device for wind tunnel wind and ice experiments, characterized in that: It comprises a basic module (1) and a disassembly-assembly module (6), wherein there are two basic modules (1) which are respectively arranged on both sides of the disassembly-assembly module (6).

2. The modular experimental equipment for wind tunnel wind-ice experiments according to claim 1, characterized in that: One of the basic modules (1) is provided with a liquid nitrogen transport pipeline (2) and a liquid nitrogen storage chamber (3) connected thereto, and the other basic module (1) is provided with a cooling water storage chamber (7) and a cooling water transport pipeline (8) connected thereto. Each basic module (1) is provided with a power supply module (11) and a plurality of evenly arranged spray systems inside. The spray systems are connected to the liquid nitrogen transport pipeline (2) or the cooling water transport pipeline (8), and the outer layers of the liquid nitrogen transport pipeline (2) and the cooling water transport pipeline (8) are provided with a thermal resistance layer (10).

3. The modular experimental equipment for wind tunnel wind-ice experiments according to claim 2, characterized in that: Each of the spray systems comprises a diversion pipe (4), a pressure-controlled spray head (5) and a movable connection module (9); The diversion pipe (4) is connected to the controllable pressure spray head (5) via a movable connection module (9).

4. A modular experimental device for wind tunnel wind-ice experiments according to any one of claims 2 or 3, characterized in that: The diversion pipe (4) is directly connected to the liquid nitrogen transport pipeline (2) or the cooling water transport pipeline (8) via a flange.

5. The modular experimental equipment for wind tunnel wind-ice experiments according to claim 3, characterized in that: Each of the diversion pipes (4) is connected to a plurality of pressure-controllable spray heads (5).

6. The modular experimental equipment for wind tunnel wind-ice experiments according to claim 5, characterized in that: The controllable pressure spray head (5) adopts a large-aperture nozzle and a multi-stage diversion hole design.

7. The modular experimental equipment for wind tunnel wind-ice experiments according to claim 2, characterized in that: A delivery pipeline is provided in the disassembly-assembly module (6), and the delivery pipeline is connected to the liquid nitrogen delivery pipeline (2) and the cooling water delivery pipeline (8) via a flange.

8. The modular experimental equipment for wind tunnel wind-ice experiments according to claim 7, characterized in that: The disassembly-assembly module (6) is further provided with a power supply module (11) and a plurality of spray systems connected to the delivery pipeline.

9. The modular experimental equipment for wind tunnel wind-ice experiments according to claim 3, characterized in that: An adaptive module is provided in the movable connection module (9) for changing the spray angle of the controllable pressure spray head (5).

10. A method for using a modular experimental device for wind tunnel wind-ice experiments according to any one of claims 1 to 9, characterized in that: The following steps are involved: Step S1: Assemble the experimental module according to the size of the experimental model; Step S2: starting the cooling water transport pipeline (8) and the spraying system connected thereto to spray cooling water mist on the surface of the experimental model to form a water film; Step S3: Start the liquid nitrogen transport pipeline (2) and the spray system connected thereto. Under the action of the wind field in the wind tunnel laboratory, the liquid nitrogen mist and the cooling water mist are fully combined to generate heat exchange. The wind field takes away the heat, causing the model to freeze during the wind tunnel experiment.

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