Large-scale multi-type tornado simulation test device

Abstract

The invention relates to the technical field of tornado simulation tests, and discloses a large-scale multi-type tornado simulation test device which comprises a wind tunnel, an air suction system, guide vanes and a test platform. The wind tunnel comprises an upper cylinder and a lower cylinder, the diameter of the upper cylinder is smaller than that of the lower cylinder, the top of the lower cylinder is provided with a connecting port matched with the upper cylinder, the upper cylinder is movably arranged in the connecting port, a sealing strip is arranged between the upper cylinder and the connecting port, and the lower cylinder is provided with an air inlet; the air suction system is arranged at the top of the upper cylinder; the test platform is movably arranged at the bottom of the lower cylinder; and the guide vanes are arranged on the side wall of the lower cylinder in an angle-adjustable manner. The direction of airflow is controlled by changing the angles of the guide vanes, so that parameters such as the swirl ratio of tornado are changed; the upper cylinder can move relative to the lower cylinder to further adjust and change parameters of the tornado, so that different types of tornado simulation tests can be highly restored.

Description

Technical Field

[0001] The invention belongs to the technical field of tornado simulation test, and in particular relates to a large-scale multi-type tornado simulation test device. Background Art

[0002] According to the United Nations Tongji data, "About half of natural disasters are related to wind." A tornado is a small-scale extreme weather with a short duration and extremely strong destructive power. It is the most violent storm in nature. Because it is directly connected to the ground, it can cause severe damage to infrastructure, economic losses and even casualties. Especially when it is ravaged by a strong / super strong tornado, the disaster caused is often devastating. At present, people know very little about tornadoes. Its formation mechanism and flow characteristics are very complex. In addition, due to the characteristics of tornadoes such as short life cycle, strong suddenness and great harm, it is very difficult to observe them on the spot. In order to deal with the global problem of tornadoes, it is currently a more feasible way to use artificial simulation methods to study the wind field characteristics of tornadoes and their mechanism of action on infrastructure.

[0003] However, existing tornado simulation devices can generally only simulate one type of tornado, and due to their own limitations, the simulation devices are unable to simulate large tornadoes with large scales and strong destructive power in nature. Therefore, a simulation test device that can accurately and conveniently simulate tornadoes of various scales and types is needed to obtain the relationship between tornadoes of various types and specifications and their simulation devices, and to better obtain the aerodynamic characteristics of the tested object in various scales and types, especially large-scale tornado wind fields. Summary of the invention

[0004] The purpose of the present invention is to provide a large-scale multi-type tornado simulation test device, and its specific technical scheme is as follows:

[0005] A large-scale multi-type tornado simulation test device comprises a wind tunnel, an air suction system, guide vanes and a test platform; the wind tunnel comprises an upper cylinder and a lower cylinder, the diameter of the upper cylinder is smaller than the diameter of the lower cylinder, the top of the lower cylinder is provided with a connection port matching the upper cylinder, the upper cylinder is movably arranged in the connection port, a sealing strip is provided between the upper cylinder and the connection port, and an air inlet is provided on the lower cylinder; the air suction system is arranged at the top of the upper cylinder, and is used to connect the upper cylinder with the outside to form an air outlet and provide suction power; the test platform is movably arranged at the bottom of the lower cylinder; the guide vanes are arranged on the side wall of the lower cylinder in an angle-adjustable manner.

[0006] Preferably, it also includes a lifting mechanism, which is used to drive the upper cylinder to slide up and down along the connecting port relative to the lower cylinder.

[0007] Preferably, the test platform is arranged in the lower cylinder through a lifting mechanism and a movable guide rail, and the lifting device and the movable guide rail are used to change the relative position of the test platform with respect to the lower cylinder.

[0008] Preferably, a honeycomb mesh and an opening and closing mechanism through which the rising airflow can pass are further provided in the upper cylinder, and the opening and closing mechanism is used to adjust the diameter of the upper cylinder through which the rising airflow can pass.

[0009] Preferably, the guide vane is hinged to the side wall of the lower cylinder via a rotating shaft, and the rotating shaft is connected to a rotating mechanism to drive the rotating shaft and the guide vane to rotate.

[0010] Preferably, the number of the guide blades is no less than 25.

[0011] Preferably, the air suction system includes a plurality of turbine blowers, and each turbine blower is correspondingly provided with a fairing and an air outlet.

[0012] Preferably, it also includes a control system, which is respectively connected to the lifting mechanism, the lifting mechanism, the opening and closing mechanism, the rotating mechanism and the turbine fan.

[0013] Preferably, the air suction system is vertically connected to the tornado cave body in an L-shape toward the outside of the cave body.

[0014] Preferably, the diameter of the upper cylinder is not less than 5 m, and the diameter of the lower cylinder is not less than 12 m.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] A large-scale multi-type tornado simulation test device includes a wind tunnel, a suction system, a guide vane and a test platform; the wind tunnel includes an upper cylinder and a lower cylinder, the diameter of the upper cylinder is smaller than the diameter of the lower cylinder, the top of the lower cylinder is provided with a connection port matching the upper cylinder, the upper cylinder is movably arranged in the connection port, a sealing strip is provided between the upper cylinder and the connection port, and an air inlet is provided on the lower cylinder; the suction system is arranged at the top of the upper cylinder; the test platform is movably arranged at the bottom of the lower cylinder; the guide vane is arranged on the side wall of the lower cylinder with an adjustable angle. The present invention controls the direction of the airflow by changing the angle of the guide vane, thereby changing the parameters such as the swirl ratio of the tornado; the upper cylinder can move relative to the lower cylinder to further adjust and change the parameters of the tornado, thereby realizing a highly restored tornado simulation test of different types.

[0017] Further features and advantages of the present invention will become apparent from the following detailed description of exemplary embodiments of the present invention with reference to the attached drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1It is a schematic diagram of the overall structure of the large-scale multi-type tornado simulation device of the present invention;

[0019] Figure 2 yes Figure 1 A top view schematic diagram of the device in use;

[0020] Figure 3 yes Figure 1 Structural diagram of the middle opening and closing mechanism and the honeycomb network assembly;

[0021] Figure 4 yes Figure 1 Schematic diagram of the structure of the middle guide vane.

[0022] In the figure: 1. wind tunnel, 1.1. upper cylinder, 1.2. lower cylinder, 1.3. air inlet, 1.4. air outlet, 1.5. honeycomb mesh, 1.6. opening and closing mechanism; 2. air suction system, 2.1. turbine fan; 3. guide vane, 3.1. rotating shaft; 4. test platform; 5. lifting mechanism; 6. test object. DETAILED DESCRIPTION

[0023] The embodiments of the present invention are described in detail below with reference to the accompanying drawings, but the present invention can be implemented in many different ways as defined and covered by the claims.

[0024] Example:

[0025] like Figure 1 The present embodiment provides a large-scale multi-type tornado simulation test device, including a wind tunnel 1, an air suction system 2, a guide vane 3 and a test platform 4; the wind tunnel 1 includes an upper cylinder 1.1 and a lower cylinder 1.2, the diameter of the upper cylinder 1.1 is smaller than the diameter of the lower cylinder 1.2, the top of the lower cylinder 1.2 is provided with a connecting port matching the upper cylinder 1.1, the upper cylinder 1.1 is movably arranged in the connecting port, and a sealing strip is provided between the upper cylinder 1.1 and the connecting port, the sealing strip is made of an aging-resistant, high and low temperature-resistant material, and adopts a "concave" design, which is used to tightly connect the upper cylinder 1.1 and the connecting port. The lower cylinder 1.2 is provided with an air inlet 1.3; the suction system 2 is arranged at the top of the upper cylinder 1.1, and is used to connect the upper cylinder 1.1 with the outside to form an air outlet 1.4 and provide suction power; the test platform 4 is movably arranged at the bottom of the lower cylinder 1.2; the guide blade 3 is arranged on the side wall of the lower cylinder 1.2 in an angle-adjustable manner.

[0026] The guide vanes are evenly arranged around the test platform, and the angle of air inflow can be controlled by changing the direction and angle of the guide vanes, thereby changing the parameters such as the swirl ratio of the tornado; and the upper cylinder can move up and down relative to the lower cylinder, and a guide rail is provided on the outer wall of the upper cylinder in the vertical direction, and a guide groove is also provided at the connection between the lower cylinder and the upper cylinder, which is used for the upper cylinder to move up and down along the lower cylinder. The sealing strip is arranged on the outside of the connection between the upper cylinder and the lower cylinder, which is used to ensure the sealing of the connection when the upper cylinder is raised and lowered in the lower cylinder, thereby ensuring the overall sealing of the wind tunnel formed by the upper cylinder and the lower cylinder. The parameters of the tornado can be further adjusted to achieve a highly restored tornado simulation test of different types.

[0027] When the turbine fan in the suction system rotates, an upward airflow is generated in the wind tunnel body composed of two nested cylinder structures consisting of upper and lower cylinders. The air passes between the guide vanes arranged in combination outside the lower cylinder, and then is guided into the interior of the wind tunnel body, and finally passes through the suction system at the top of the wind tunnel body. By changing the angle of the guide vanes and the strength of the suction system, the radial and tangential velocities of the airflow change. When the air reaches the gap between the guide vanes, rotating air is formed on the test platform inside the lower cylinder, and then lifted up by the suction system to form a raised cylindrical posture. Then, the turbine fan in the suction system allows the air to pass and recirculate.

[0028] In addition, reference Figure 2 , by using a scaled model, i.e., test object 6, under the action of a tornado in a tornado simulation device, a simulation test is conducted on the aerodynamic characteristics of the infrastructure structure by simulating a tornado that is realistically restored to the actual infrastructure structure, thereby realizing a wind tunnel test method and device for the aerodynamic characteristics of the infrastructure structure under the action of a tornado with a high degree of restoration and realism. The data collected will help to understand the interaction between the tornado and the test object and how the structure is destroyed - this will help researchers to formulate relevant structural loads and disaster prevention and mitigation standards to improve the safety of structures (such as buildings, etc.).

[0029] It also includes a lifting mechanism, which is used to drive the upper cylinder 1.1 to slide up and down along the connecting port relative to the lower cylinder 1.2.

[0030] The test platform 4 is arranged in the lower cylinder through a lifting mechanism 5 and a movable guide rail, and the lifting device and the movable guide rail are used for lifting and translating the test platform 4 relative to the lower cylinder.

[0031] The lifting mechanism 5 supports and lifts the test platform through hydraulic pipelines, and can also support it by setting a unique supporting structure. A spherical hinge shaft is set at the connection part between the lifting mechanism 5 and the test platform to deflect the test platform in multiple directions and adjust the posture of the test platform.

[0032] The power of the suction system and the structural arrangement of the guide vanes as well as the tested structural model are customized for each specific test. The tested structural model is placed on the tornado test platform. Different terrains can be added to the test platform to consider the impact of terrain on wind effects. Different heights can also be generated by raising or lowering the test platform. The use of guide rails to translate the test platform in the lower cylinder can simulate a moving tornado.

[0033] refer to Figure 3 The upper cylinder 1.1 is also provided with a honeycomb net 1.5 through which the rising airflow can pass and an opening and closing mechanism 1.6, and the opening and closing mechanism 1.6 is used to adjust the diameter of the upper cylinder 1.1 through which the rising airflow can pass. The structure of the honeycomb net is a hexagonal hole structure in the middle, and completely fills the entire upper cylinder. Through the diameter of the opening and closing mechanism, the diameter of the airflow actually passing through the upper cylinder can be controlled, which is equivalent to changing the diameter of the entire upper cylinder, making it easier to control the tornado parameters and form different types of tornadoes.

[0034] refer to Figure 4 The guide vane 3 is hinged to the side wall of the lower cylinder 1.2 through a rotating shaft, and the rotating shaft is connected to a rotating mechanism, and the rotating mechanism is used to drive the rotating shaft and the guide vane 3 to rotate. The rotating mechanism drives the rotating shaft and the guide vane to rotate together, avoiding the complicated steps of adjusting the guide vane separately and reducing the error of manual adjustment.

[0035] The number of the guide vanes 3 is not less than 25. In order to adjust and simulate large-scale and multi-type tornadoes with higher precision, more than 25 guide vanes are set, the adjustment is more precise, the response is quick, and the parameters such as the tornado swirl ratio can be adjusted in a wider range.

[0036] The air suction system 2 includes a plurality of turbine fans 2.1, and each turbine fan 2.1 is correspondingly provided with a fairing and an air outlet 1.4. Each turbine fan is composed of a plurality of separate axial flow fans and servo motors. The axial flow fans rotate under the drive of the servo motors to generate axial airflows, and the airflows flow out from bottom to top. The servo motors are used to control the speed of the axial flow fans, thereby controlling the flow rate and flow of the tornado. Moreover, by setting up a plurality of groups of turbine fans, which can be controlled individually, the working number and working speed of the turbine fans can be controlled in a larger range from small to large, and a large range of adjustment of the flow speed of the tornado can be achieved, so as to facilitate the simulation of more different types of tornadoes and large-scale tornadoes.

[0037] In this embodiment, a control system is also included, and the control system is connected to the lifting mechanism, the lifting mechanism 5, the opening and closing mechanism 1.6, the rotating mechanism and the turbine fan 2.1 respectively. The control system can accurately control the above structures. It is convenient to accurately generate tornadoes with various parameters, so as to conduct physical simulation experiments related to tornadoes, and can also reduce energy losses during system operation through precise control.

[0038] The air suction system 2 is connected to the upper cylinder in an L-shape.

[0039] The diameter of the upper cylinder 1.1 is not less than 5 m, and the diameter of the lower cylinder 1.2 is not less than 12 m. Through the above arrangement, a tornado with greater strength and range can be formed.

[0040] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A large-scale multi-type tornado simulation test device, characterized in that: It comprises a wind tunnel (1), an air suction system (2), a guide vane (3) and a test platform (4); The wind tunnel (1) comprises an upper cylinder (1.1) and a lower cylinder (1.2); the diameter of the upper cylinder (1.1) is smaller than that of the lower cylinder (1.2); a connection port matching the upper cylinder (1.1) is provided at the top of the lower cylinder (1.2); the upper cylinder (1.1) is movably arranged in the connection port; a sealing strip is provided between the upper cylinder (1.1) and the connection port; and an air inlet (1.3) is provided on the lower cylinder (1.2); The air suction system (2) is arranged at the top of the upper cylinder (1.1) and is used to connect the upper cylinder (1.1) with the outside to form an air outlet (1.4) and provide air suction power; The test platform (4) is movably arranged in the lower cylinder (1.2); The guide blades (3) are arranged on the side wall of the lower cylinder (1.2) in an angle-adjustable manner.

2. A large-scale multi-type tornado simulation test device according to claim 1, characterized in that: It also comprises a lifting mechanism, which is used to drive the upper cylinder (1.1) to slide up and down along the connecting port relative to the lower cylinder (1.2).

3. A large-scale multi-type tornado simulation test device according to claim 2, characterized in that: The test platform (4) is movably arranged in the lower cylinder via a lifting mechanism (5) and a movable guide rail, and the lifting mechanism and the movable guide rail are used for lifting and lowering and translating the test platform (4) relative to the lower cylinder.

4. A large-scale multi-type tornado simulation test device according to claim 3, characterized in that: The upper cylinder (1.1) is also provided with a honeycomb net (1.5) through which the rising airflow can pass and an opening and closing mechanism (1.6), wherein the opening and closing mechanism (1.6) is used to adjust the diameter of the upper cylinder (1.1) through which the rising airflow can pass.

5. A large-scale multi-type tornado simulation test device according to claim 4, characterized in that: The guide vane (3) is hinged to the side wall of the lower cylinder (1.2) via a rotating shaft, and the rotating shaft is connected to a rotating mechanism, and the rotating mechanism is used to drive the rotating shaft and the guide vane (3) to rotate.

6. A large-scale multi-type tornado simulation test device according to claim 5, characterized in that: The number of the guide blades (3) is no less than 25.

7. A large-scale multi-type tornado simulation test device according to claim 6, characterized in that: The air suction system (2) comprises a plurality of turbine fans (2.1), and each turbine fan (2.1) is correspondingly provided with a fairing and an air outlet (1.4).

8. A large-scale multi-type tornado simulation test device according to claim 7, characterized in that: It also comprises a control system, which is respectively connected to the lifting mechanism, the lifting mechanism (5), the opening and closing mechanism (1.6), the rotating mechanism and the turbine fan (2.1).

9. A large-scale multi-type tornado simulation test device according to claim 1, characterized in that: The air suction system (2) is connected to the upper cylinder in an L-shape.

10. The large-scale multi-type tornado simulation test device according to claim 1, characterized in that: The diameter of the upper cylinder (1.1) is not less than 5m, and the diameter of the lower cylinder (1.2) is not less than 12m.

Images