A thermal fluid-structure coupling wind tunnel test system

Abstract

The application discloses a kind of hot fluid coupling wind tunnel test systems, comprising: support rod;Temperature field simulation component, temperature field simulation component includes heat insulation layer, heating element and shell, heat insulation layer is sleeved on the outside of support rod, shell is sleeved on the outside of heat insulation layer, heating element is arranged between heat insulation layer and shell;Insulating heat insulation element is connected to one end of temperature field simulation component;Force element is connected to the end of insulating heat insulation element away from temperature field simulation component;Temperature measuring element is arranged in shell;Power supply device is electrically connected with heating element;Control unit is electrically connected with heating element, temperature measuring element and power supply device respectively, and is used to control the heating power of heating element according to wind speed and temperature signal fed back by temperature measuring element.The system is simple in structure, easy to install and operate, can realize three-field coupling comprehensive simulation of temperature field, wind field and structure response in wind tunnel test, and provides a high-fidelity verification method for computational fluid dynamics method.

Description

Technical Field

[0001] This invention relates to the field of wind tunnel testing technology for engineering structures, and specifically to a thermal-fluid-structure interaction wind tunnel testing system. Background Technology

[0002] The solar thermal power plant's receiver tower is an engineering structure primarily driven by the power generation process. It converts solar energy, reflected and concentrated by heliostats at the top, into heat energy, which is then transferred to the working medium, such as molten salt. Therefore, the receiver tower's operating status directly affects the conversion and storage efficiency of solar energy. Currently, receiver towers are mainly hybrid structures consisting of a lower concrete structure and an upper steel structure, and this has become the preferred structural form for large-capacity receiver towers. However, this type of steel-concrete hybrid structure suffers from complex structural transitions, uneven mass and stiffness distribution, and heavy top loads, leading to significant wind-induced vibration effects. Controlling the structure's wind-induced vibration response has become a design challenge.

[0003] Existing standards and engineering applications focus on verifying the structural bearing capacity, deformation capacity, and collapse resistance, leaving many unresolved issues in wind-resistant design theory and methods. For example, current research typically studies the wind-induced response of heat-absorbing towers at room temperature through aeroelastic model wind tunnel tests, or establishes numerical wind tunnels for heat-absorbing tower structures based on computational fluid dynamics (CFD) technology and conducts fluid-structure interaction analysis. However, these studies all treat the heat-absorbing tower as a room-temperature structure and do not address the impact of ultra-high temperature (above 1000℃) conditions on the aerodynamic characteristics of the structure. In actual operation, the surface temperature of the collector at the top of the heat-absorbing tower can exceed 1000℃. When the collector surface is under ultra-high temperature conditions, it significantly alters the temperature field and flow characteristics of the surrounding air, thereby affecting the aerodynamic load and vibration response of the structure.

[0004] Furthermore, while existing research has focused on the aerodynamic loads and vibration responses of receiver tower collectors, it typically neglects the thermal radiation effect, making it difficult to accurately assess the wind loads and vibration responses of receiver towers under ultra-high temperature conditions. Most studies are based on steady-state wind fields, assuming the high-temperature temperature field remains constant. However, in reality, convective heat transfer caused by the wind field and the structure's own thermal radiation effects cause the temperature field to change with wind speed, and research in this area remains insufficient.

[0005] Therefore, there is an urgent need to develop a wind tunnel testing system capable of simulating thermal-fluid-structure interaction to fill the technological gap in multi-field coupled wind tunnel testing of heat-absorbing towers under ultra-high temperature conditions. Summary of the Invention

[0006] The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art and provide a thermal-fluid-structure coupling wind tunnel test system that is simple in structure, easy to install and operate, and can realize the comprehensive simulation of the three-field coupling (thermal-fluid-structure coupling) of temperature field, wind field and structural response in wind tunnel tests.

[0007] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: A thermal-fluid-structure interaction wind tunnel testing system, comprising: Support rod; A temperature field simulation component includes a heat insulation layer, a heating element, and a housing. The heat insulation layer is sleeved on the outside of the support rod, the housing is sleeved on the outside of the heat insulation layer, and the heating element is disposed between the heat insulation layer and the housing. An insulating and heat-resistant element is connected to one end of the temperature field simulation component; A force measuring element is connected to the end of the insulating and heat-insulating element away from the temperature field simulation component, and is used to measure the force and vibration response of the temperature field simulation component during wind tunnel testing. The temperature sensing element is disposed inside the housing; The power supply device is electrically connected to the heating element; The control unit is electrically connected to the heating element, the temperature measuring element, and the power supply device, respectively, and is used to control the heating power of the heating element according to the wind speed and the temperature signal fed back by the temperature measuring element.

[0008] As a further improvement to the above technical solution: the heating element includes multiple heating wires, which are arranged vertically and uniformly along the outer periphery of the insulation layer. The insulating heat insulation element is provided with a current-carrying wire, and each heating wire is connected in series through the current-carrying wire.

[0009] As a further improvement to the above technical solution: the heating element includes multiple sets of heating units, and each heating unit is connected in parallel with the others by wires. Each heating unit includes multiple heating wires.

[0010] As a further improvement to the above technical solution: the insulating and heat-insulating element is provided with a wire hole, and a positive wire and a negative wire are passed through the wire hole. One end of the positive wire is connected to the power supply device and the other end is connected to the heating unit. One end of the negative wire is connected to the power supply device and the other end is connected to the heating unit.

[0011] As a further improvement to the above technical solution: the insulating and heat-insulating element is an insulating and heat-insulating ceramic layer, used to isolate the temperature field simulation component and the force measuring element.

[0012] As a further improvement to the above technical solution: the temperature measuring element is an embedded thermocouple, the measuring end of the embedded thermocouple is embedded in the housing, and the output end of the embedded thermocouple is electrically connected to the control unit.

[0013] As a further improvement to the above technical solution: the outer periphery of the embedded thermocouple is fitted with an insulating and heat-insulating ceramic tube.

[0014] As a further improvement to the above technical solution, a fixing base is also included. The fixing base is located on the support rod and is connected to the end of the temperature field simulation component that is away from the insulating and heat-insulating element, so as to fix the temperature field simulation component.

[0015] As a further improvement to the above technical solution: the control unit is a PID controller, used to control the heating power of the heating element according to the wind speed and the temperature signal fed back by the temperature measuring element.

[0016] As a further improvement to the above technical solution: the heat insulation layer is made of ceramic fiber, aerogel material or rock wool; the outer shell is a metal shell.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. The thermal-fluid-structure interaction (TFI) wind tunnel testing system disclosed in this invention achieves comprehensive simulation of the three-field coupling (thermal-fluid-structure interaction) of temperature field, wind field, and structural response in wind tunnel tests through the cooperation of a support rod, a temperature field simulation component, an insulating element, a force measuring element, a temperature measuring element, a power supply device, and a control unit. The temperature field simulation component can actively heat the outer shell to simulate an ultra-high temperature field environment through a heating element, and can also block heat transfer to the support rod through a heat insulation layer to ensure that the support rod does not deform due to heat, thereby ensuring that the force measured by the force measuring element is a true representation of the aerodynamic force and wind vibration response. The control unit adjusts the heating power in real time according to the wind speed and the temperature signal fed back by the temperature measuring element, realizing dynamic adjustment of the temperature field according to the wind field changes. This overcomes the defect of the high-temperature temperature field remaining unchanged in traditional tests. This system has a simple structure, is easy to install and operate, and provides a high-fidelity verification method for computational fluid dynamics methods.

[0018] 2. The thermal-fluid-structure interaction wind tunnel test system disclosed in this invention further simulates the high-temperature field formed by solar radiation concentrated in the solar collector tower by using a high-temperature field generated by heating with electric heating wires, thus simulating the thermal boundary conditions of a real heat-absorbing tower collector. The uniformly vertically arranged electric heating wires enable a controllable and reproducible temperature field distribution on the outer shell surface, avoiding local overheating or uneven heating, and improving the reliability and repeatability of test data. Furthermore, the electric heating wires can be programmed into multiple heating units. By connecting multiple heating units in parallel, it is possible to ensure consistent current and uniform heating in each heating wire, while reducing the current and voltage drop of a single circuit. Even if a heating unit fails, the overall heating function is not affected, and the temperature regulation control is convenient.

[0019] 3. The thermo-fluid-structure interaction wind tunnel testing system disclosed in this invention further enhances this feature by enabling the embedded thermocouple's measuring end to detect the shell temperature in real time and accurately, providing precise temperature feedback signals to the control unit and achieving closed-loop temperature control to ensure the shell temperature is precisely maintained within the target temperature range. By encasing the embedded thermocouple in an insulating ceramic tube, the signal transmission line of the thermocouple is thermally protected, preventing measurement errors or damage to the middle part of the thermocouple due to heat conduction in high-temperature environments, thus improving the accuracy of temperature measurement and long-term operational stability. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the thermal-fluid-structure interaction wind tunnel test system in this invention.

[0021] Figure 2 This is a longitudinal cross-sectional view of the temperature field simulation component of the thermal-fluid-structure interaction wind tunnel test system in this invention.

[0022] Figure 3 This is a cross-sectional view of the temperature field simulation component of the thermal-fluid-structure interaction wind tunnel test system in this invention.

[0023] Figure 4 This is a cross-sectional view of the insulation and heat-insulating element inside the thermal fluid-structure interaction wind tunnel test system of the present invention.

[0024] Figure 5 This is a schematic diagram of the embedded thermocouple in the thermal-fluid-structure interaction wind tunnel test system of the present invention.

[0025] The labels in the diagram represent: 1. Force measuring element; 2. Temperature field simulation component; 3. Insulating and heat-insulating element; 4. Support rod; 5. Outer shell; 6. Heating element; 61. Heating wire; 7. Heat insulation layer; 9. Current-carrying wire; 10. Wire hole; 11. Positive wire; 12. Negative wire; 13. Temperature measuring element; 131. Measuring end; 132. Output end; 133. Insulating and heat-insulating ceramic tube; 14. Fixing base; 15. Power supply device. Detailed Implementation

[0026] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0027] As shown in the specification and claims of this invention, unless the context clearly indicates otherwise, the words "a," "an," "an," and / or "the" are not specifically singular and may include plural forms. The terms "first," "second," and similar terms used in this invention do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Similarly, the terms "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. The terms "connected" or "linked" are not limited to physical or mechanical connections but may include electrical connections, whether direct or indirect.

[0028] like Figures 1 to 5 As shown, the thermal-fluid-structure interaction wind tunnel test system of this embodiment includes: Support rod 4 extends vertically and serves as the core support frame of the entire test system; Temperature field simulation component 2 includes a heat insulation layer 7, a heating element 6, and a housing 5. The heat insulation layer 7 is sleeved on the outside of the support rod 4, the housing 5 is sleeved on the outside of the heat insulation layer 7, and the heating element 6 is disposed between the heat insulation layer 7 and the housing 5. Insulating and heat-insulating element 3 is connected to one end of temperature field simulation component 2; Force measuring element 1 is connected to the end of insulating and heat-insulating element 3 away from temperature field simulation component 2, and is used to measure the force and vibration response of temperature field simulation component 2 during wind tunnel test; Temperature sensing element 13 is disposed inside housing 5 and is used to detect the temperature of housing 5; Power supply device 15 is electrically connected to heating element 6; The control unit (not shown in the figure) is electrically connected to the heating element 6, the temperature measuring element 13 and the power supply device 15 respectively, and is used to control the heating power of the heating element 6 according to the wind speed and the temperature signal fed back by the temperature measuring element 13.

[0029] This fluid-structure interaction (FSI) wind tunnel testing system, through the coordination of support rod 4, temperature field simulation component 2, insulation and heat insulation element 3, force measuring element 1, temperature measuring element 13, power supply device 15, and control unit, achieves comprehensive simulation of three-field coupling (thermal-fluid-structure interaction) of temperature field, wind field, and structural response in wind tunnel testing. The temperature field simulation component 2 can actively heat the outer shell 5 through heating element 6 to simulate an ultra-high temperature field environment, and also prevent heat transfer to support rod 4 through insulation layer 7, ensuring that support rod 4 does not deform due to heat, thereby guaranteeing that the force measured by force measuring element 1 reflects the actual aerodynamic force and wind vibration response. The control unit adjusts the heating power in real time based on wind speed and temperature signals fed back by temperature measuring element 13, achieving dynamic adjustment of the temperature field according to changes in the wind field. This overcomes the deficiency of traditional tests where the high-temperature temperature field remains constant. This system has a simple structure, is easy to install and operate, and provides a high-fidelity verification method for computational fluid dynamics. The wind speed is provided by the wind tunnel control system.

[0030] In this embodiment, the heating element 6 includes multiple heating wires 61, which are uniformly arranged vertically along the outer periphery of the insulation layer 7. A conductive wire 9 is provided inside the insulating insulation element 3, and the heating wires 61 are connected in series via the conductive wire 9. Specifically, the uniform heating of the temperature field simulation component 2 is achieved by the multiple heating wires 61 uniformly arranged vertically along the outer periphery of the insulation layer 7. The high-temperature field formed by the heating of the heating wires 61 simulates the high-temperature field formed by solar radiation concentrated in the heat collection tower. The uniformly arranged vertical heating wires 61 enable a controllable and reproducible temperature field distribution on the surface of the outer shell 5, avoiding local overheating or uneven heating, and improving the reliability and repeatability of the test data.

[0031] In this embodiment, the heating element 6 includes multiple heating units, which are connected in parallel to each other via wires. Each heating unit includes multiple heating wires 61, which are evenly arranged vertically along the outer periphery of the insulation layer 7. A current-carrying wire 9 is provided inside the insulating insulation element 3, and the heating wires 61 are connected in series via the current-carrying wire 9. The heating element 6 adopts a hybrid circuit structure of "first series, then parallel": multiple heating wires 61 are connected in series via the current-carrying wire 9 to form a heating unit, and multiple heating units are then connected in parallel to each other via wires and connected to the power supply device 15. This structure ensures that the current of each heating wire 61 is consistent, resulting in uniform heating. Simultaneously, the parallel design reduces the current and voltage drop of a single circuit segment. Even if a section of heating wire 61 fails, only that group stops working, while the remaining groups continue to operate normally, ensuring uninterrupted overall heating function and eliminating the need for test interruption. Furthermore, each group can be controlled independently. It should be noted that in other embodiments, the heating element 6 can also adopt the following alternative: it includes multiple heating wires 61, each heating wire 61 connected in series by a current-carrying wire 9. This scheme also uses the high-temperature field formed by the heating of the heating wires 61 to simulate the high-temperature field formed by solar radiation concentrated in the heat collection tower, simulating the thermal boundary conditions of a real heat-absorbing tower collector. The series connection of each heating wire 61 can ensure that the current in each heating wire 61 is consistent, thereby achieving uniform heating. At the same time, the series arrangement can generate a controllable and reproducible temperature field distribution on the surface of the outer shell 5, avoiding local overheating or uneven heating, and improving the reliability and repeatability of the test data.

[0032] Figure 4 To demonstrate the connection between the heating wire 61 in the temperature field simulation component 2 and the current-carrying wire 9 in the insulating and heat-insulating element 3, the heating wire 61 is specifically shown in... Figure 4 It is indicated by a dashed line. For example... Figure 4 As shown, the three heating wires 61 can be grouped together and connected in parallel; however, the specific grouping method can be determined according to the actual situation during implementation.

[0033] The principle of temperature field simulation is explained as follows: In a real solar collector, surface heating originates from solar radiation. Numerous heliostats reflect and concentrate sunlight onto the collector surface, converting light energy into heat energy. This embodiment uses electrical energy to convert light energy into heat energy, which is equivalent in thermal effect: both use the surface of the outer shell 5 as the heated surface, forming a high-temperature field. The key is that this embodiment uses electrical energy instead of light energy as the heat source, and both are equivalent in thermal effect, using the surface of the outer shell 5 as the heated surface to form a high-temperature field. By controlling the heating power of the heating wire 61, the surface temperature of the outer shell 5 reaches a preset value to reproduce the thermal boundary conditions of a real solar collector in the experimental system. The arrangement density of the heating wire 61 matches the thickness of the outer shell 5, ensuring uniform heating without localized overheating. When the arrangement density of the heating wire 61 is high, the heat source density per unit area increases, suitable for thicker shells to compensate for temperature gradients along the heat conduction path; when the shell is thinner, a lower arrangement density can be used to avoid overheating.

[0034] In this embodiment, the insulating and heat-insulating element 3 is provided with a wire hole 10, through which a positive wire 11 and a negative wire 12 are threaded. One end of the positive wire 11 is connected to the power supply device 15, and the other end is connected to the heating unit. One end of the negative wire 12 is connected to the power supply device 15, and the other end is connected to the heating unit. Specifically, as shown... Figure 4 As shown, the positive wire 11 is connected to one end of the heating unit, and the negative wire 12 is connected to the other end of the heating unit. The structural design of the wire hole 10 provides a safe entry and exit channel for the positive wire 11 and the negative wire 12, preventing internal circuit failure due to high temperature, and avoiding short circuits or leakage inside the insulation and heat insulation element 3, thus improving the safety and reliability of the system. Multiple wire holes 10 can be provided to facilitate the connection of the corresponding positive wire 11 and negative wire 12 to the power supply device 15 after they extend out of the insulation and heat insulation element 3.

[0035] In this embodiment, the insulating and heat-insulating element 3 is an insulating and heat-insulating ceramic layer used to isolate the temperature field simulation component 2 and the force measuring element 1. Specifically, the insulating and heat-insulating element 3 is made of ceramic material so that it can isolate the heat transfer between the temperature field simulation component 2 and the force measuring element 1, and also protect the current-carrying wire 9, the positive wire 11 and the negative wire 12; its high-temperature insulation performance ensures that the internal wires work normally in high-temperature environments, prevents leakage and short circuits caused by high temperatures, and ensures the safety and stability of the power supply circuit.

[0036] In this embodiment, the temperature sensing element 13 is an embedded thermocouple. The measuring end 131 of the embedded thermocouple is embedded in the outer shell 5, and the output end 132 of the embedded thermocouple is electrically connected to the control unit. An insulating ceramic tube 133 is fitted around the periphery of the embedded thermocouple. Specifically, the measuring end 131 of the embedded thermocouple can detect the temperature of the outer shell 5 in real time and accurately, providing a precise temperature feedback signal to the control unit, realizing closed-loop temperature control, and ensuring that the temperature of the outer shell 5 is accurately maintained within the target temperature range. By fitting an insulating ceramic tube 133 around the periphery of the embedded thermocouple, the signal transmission line of the thermocouple is thermally protected, preventing measurement errors or damage to the middle part of the thermocouple due to heat conduction in a high-temperature environment, thereby improving the accuracy of temperature measurement and long-term operational stability.

[0037] In this embodiment, a fixing base 14 is also included. The fixing base 14 is located on the support rod 4 and is connected to the end of the temperature field simulation component 2 away from the insulating and heat-insulating element 3 for fixing the temperature field simulation component 2. Specifically, the fixing base 14 may be made of a high-temperature resistant material and cooperates with the insulating and heat-insulating element 3 to maintain a stable posture of the temperature field simulation component 2 during wind tunnel testing, preventing shaking or displacement due to high-speed airflow impact, and ensuring the accuracy and reliability of the measurement data of the force measuring element 1.

[0038] In this embodiment, the control unit is a PID controller, used to control the heating power of the heating element 6 based on the wind speed and the temperature signal fed back by the temperature measuring element 13. Specifically, the PID controller is an industrial automation controller based on proportional (P), integral (I), and derivative (D) control algorithms. Its control principle is existing technology and will not be elaborated here. This embodiment preferably uses a PID temperature-wind speed controller, which monitors the structural temperature through an embedded thermocouple and uses the PID temperature-wind speed controller to regulate the temperature field as it changes with the wind field and the influence of thermal radiation. The PID control algorithm adjusts the heating power of the heating element 6 in real time based on the wind speed and the temperature signal fed back by the temperature measuring element 13, realistically simulating the dynamic temperature field change characteristics of the actual heat-absorbing tower's heat collection section under natural wind conditions.

[0039] In this embodiment, the insulation layer 7 is made of ceramic fiber, aerogel material, or rock wool; the outer shell 5 is a metal shell. Specifically, the insulation layer 7 utilizes the low thermal conductivity and high temperature resistance of the above materials to effectively block the high-temperature heat generated by the heating element 6 from being transferred to the support rod 4, ensuring that the support rod 4 does not undergo thermal deformation under ultra-high temperature conditions. The outer shell 5 is set as a metal shell, and the metal shell adopts a thin-walled structure with the same proportion and thermal expansion characteristics as the actual heat collection section, which realistically simulates the aerodynamic load and wind vibration response of the outer layer of the actual heat absorption tower heat collection section when subjected to wind and temperature fields.

[0040] The workflow of this system is as follows: Step 1: Start the wind tunnel and adjust the wind speed to the predetermined value. The wind tunnel control system transmits the wind speed signal to the PID controller in real time.

[0041] Step 2: Power is supplied to the heating element 6 through the power supply device 15, causing the heating wire 61 to start heating and heat the outer shell 5. During the heating process, the embedded thermocouple monitors the temperature of the outer shell 5 in real time and feeds the temperature signal back to the PID controller.

[0042] Step 3: The PID controller calculates the required heating power adjustment based on the deviation between the preset target temperature and the actual temperature fed back by the embedded thermocouple, combined with the current wind speed, and outputs a control signal to the power supply device 15 to adjust the voltage or current output by the power supply device 15 to the heating element 6, so that the temperature of the outer shell 5 rises rapidly and stabilizes within the target temperature range.

[0043] Step 4: Activate force measuring element 1. After the temperature of the outer casing 5 stabilizes, begin collecting force data and vibration response data of the temperature field simulation component 2 under the action of wind tunnel airflow. The measurement data of force measuring element 1 is recorded in real time through the data acquisition system.

[0044] Step 5: Record the measurement data of force measuring element 1 under different wind speeds and target temperatures as a basis for comparative analysis of aerodynamic load and wind vibration response, and use it to verify and calibrate the computational fluid dynamics (CFD) simulation model.

[0045] Through the above workflow, this system can simultaneously simulate the coupling effect of ultra-high temperature field, wind field and structural response in a wind tunnel test environment, providing an effective test method for studying the aerodynamic load and wind vibration response of the heat-collecting section of the heat-absorbing tower under real ultra-high temperature service conditions.

[0046] In summary, the thermal-fluid-structure interaction wind tunnel testing system provided by this invention has the following advantages: First, this system actively heats the outer shell 5 through the heating element 6 in the temperature field simulation component 2 to simulate the ultra-high temperature field, and combines the heat insulation layer 7 to block the heat transfer to the support rod 4. In the wind tunnel test, it realizes the synchronous simulation of the three-field coupling (thermal-fluid-solid coupling) of temperature field, wind field and structural response, filling the technical gap of multi-field coupling wind tunnel test of heat absorption tower under ultra-high temperature conditions.

[0047] Secondly, this system detects the temperature of the outer shell 5 in real time through the temperature sensing element 13, and dynamically adjusts the heating power according to the wind speed and temperature feedback signals through the control unit, realizing real-time control of the temperature field as the wind field changes. This overcomes the defect of the high temperature field remaining unchanged in traditional tests, and can truly simulate the dynamic characteristics of the temperature field of the actual heat-absorbing tower heat collection section under natural wind field conditions.

[0048] Third, the system has a simple structure and is easy to install and operate. Through the force measuring element 1, it can simultaneously collect the force data and vibration response data of the temperature field simulation component 2 under the conditions of thermo-fluid-solid multi-field coupling, providing a high-fidelity verification means for computational fluid dynamics methods.

[0049] While the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the invention. Any person skilled in the art can make many possible variations and modifications to the technical solutions of the present invention, or modify them into equivalent embodiments, without departing from the scope of the present invention. Therefore, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention, without departing from the scope of the present invention, should fall within the protection scope of the present invention.

Claims

1. A thermal-fluid-structure interaction wind tunnel testing system, characterized in that, include: Support rod (4); Temperature field simulation component (2), the temperature field simulation component (2) includes a heat insulation layer (7), a heating element (6) and a shell (5), the heat insulation layer (7) is sleeved on the outside of the support rod (4), the shell (5) is sleeved on the outside of the heat insulation layer (7), and the heating element (6) is disposed between the heat insulation layer (7) and the shell (5); An insulating and heat-insulating element (3) is connected to one end of the temperature field simulation component (2); A force measuring element (1) is connected to the end of the insulating and heat-insulating element (3) away from the temperature field simulation component (2) and is used to measure the force and vibration response of the temperature field simulation component (2) during the wind tunnel test. Temperature sensing element (13) is disposed inside the housing (5); The power supply device (15) is electrically connected to the heating element (6); The control unit is electrically connected to the heating element (6), the temperature measuring element (13) and the power supply device (15) respectively, and is used to control the heating power of the heating element (6) according to the wind speed and the temperature signal fed back by the temperature measuring element (13).

2. The thermal-fluid-structure interaction wind tunnel test system according to claim 1, characterized in that: The heating element (6) includes multiple heating wires (61), which are arranged vertically and uniformly along the outer periphery of the heat insulation layer (7). The insulating heat insulation element (3) is provided with a power-conducting wire (9), and each heating wire (61) is connected in series through the power-conducting wire (9).

3. The thermal-fluid-structure interaction wind tunnel test system according to claim 2, characterized in that: The heating element (6) includes multiple sets of heating units, and each heating unit is connected in parallel with the others by wires. Each heating unit includes multiple heating wires (61).

4. The thermal-fluid-structure interaction wind tunnel testing system according to claim 3, characterized in that: The insulating and heat-insulating element (3) is provided with a wire hole (10), and a positive wire (11) and a negative wire (12) are inserted into the wire hole (10). One end of the positive wire (11) is connected to the power supply device (15), and the other end is connected to the heating unit. One end of the negative wire (12) is connected to the power supply device (15), and the other end is connected to the heating unit.

5. The thermal-fluid-structure interaction wind tunnel testing system according to claim 4, characterized in that: The insulating and heat-insulating element (3) is an insulating and heat-insulating ceramic layer used to isolate the temperature field simulation component (2) and the force measuring element (1).

6. The thermal-fluid-structure interaction wind tunnel testing system according to any one of claims 1 to 5, characterized in that: The temperature measuring element (13) is an embedded thermocouple. The measuring end (131) of the embedded thermocouple is embedded in the outer shell (5), and the output end (132) of the embedded thermocouple is electrically connected to the control unit.

7. The thermal-fluid-structure interaction wind tunnel testing system according to claim 6, characterized in that: The embedded thermocouple is surrounded by an insulating ceramic tube (133).

8. The thermal-fluid-structure interaction wind tunnel testing system according to any one of claims 1 to 5, characterized in that: It also includes a fixing seat (14), which is located on the support rod (4) and connected to the end of the temperature field simulation component (2) away from the insulating heat insulation element (3) for fixing the temperature field simulation component (2).

9. The thermal-fluid-structure interaction wind tunnel testing system according to any one of claims 1 to 5, characterized in that: The control unit is a PID controller, used to control the heating power of the heating element (6) according to the wind speed and the temperature signal fed back by the temperature measuring element (13).

10. The thermal-fluid-structure interaction wind tunnel testing system according to any one of claims 1 to 5, characterized in that: The heat insulation layer (7) is made of ceramic fiber, aerogel material or rock wool; the outer shell (5) is a metal shell.

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