Large-scale model wind tunnel test device and debugging method thereof

Abstract

The invention relates to the technical field of wind tunnel tests, in particular to a large-scale model wind tunnel test device and a debugging method thereof. The scale model wind tunnel test device comprises a supporting device which comprises an upper supporting truss, a lower supporting truss and a plurality of supporting stand columns, the upper supporting truss and the lower supporting truss are composed of main beams and anchoring structures, the supporting stand columns are connected with the upper supporting truss and the lower supporting truss, and sliding rails are symmetrically arranged on the upper supporting truss and the lower supporting truss. The large-scale model is connected between the two sliding rails through a line spacing adjusting device and an inclination angle adjusting device, large-scale model assemblies are fixed to the upper end and the lower end of the large-scale model through detachable force transmission plates, and the force transmission plates are connected with a force measuring balance; the large-scale model is provided with a pressure measuring hole, and the scale ratio of the large-scale model is greater than 1: 20; a wind pressure sensor is arranged in the data acquisition device, the data acquisition device is connected with the pressure measuring hole of the large-scale model through a pressure measuring pipe, and wind pressure is transmitted to the wind pressure sensor of the data acquisition device through the pressure measuring pipe. The large-scale model wind tunnel test device and the debugging method thereof are convenient and fast to install and flexible to adjust.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of wind tunnel test of wind engineering, in particular, to a large-scale model wind tunnel test device and a debugging method thereof. BACKGROUND

[0002] Wind tunnel test is an important means to obtain the aerodynamic characteristics and flow field characteristics of structure in the field of wind engineering such as building engineering and bridge engineering. The number of extreme weather occurrences is also increasing, and special winds such as sudden tornadoes and downbursts also bring greater challenges to wind engineering. In order to simulate the real structure wind environment on the ground, the size of the wind tunnel test model and the simulation accuracy of the test environment are also continuously improved.

[0003] When the model size is increased, the test is performed at a large attack angle or in an array arrangement, the installation and fixation of the large-scale model in the wind tunnel become more complex and difficult, especially the existing domestic building wind tunnels are mainly rectangular sections, and the long side of the wind tunnel section is habitually used as the ground, and the short side of the wind tunnel section is habitually used as the wall, which makes it necessary to vertically place the model in order to meet the internal blockage ratio requirements of the wind tunnel during the design of the large-scale model wind tunnel test. The model is designed by the designers according to the specific parameters of the respective test sites, and the appropriate model parameters are selected. The wind tunnel test device that meets the vertical installation of the large-scale model also needs to have sufficient rigidity to ensure the reliability and accuracy of the wind tunnel test, and to avoid the aerodynamic test conditions as much as possible.

[0004] Therefore, how to arrange a large-scale model wind tunnel test device that is convenient and fast to install and flexible to adjust in a large-size section wind tunnel laboratory has become a problem to be solved in wind tunnel test. SUMMARY

[0005] The problem to be solved by the present application is to provide a large-scale model wind tunnel test device and a debugging method thereof, which are convenient and fast to install and flexible to adjust.

[0006] The technical scheme provided by the present application is as follows: a large-scale model wind tunnel test device, comprising: a support device comprising two groups of support trusses composed of a main beam and an anchoring structure, a plurality of support columns connecting the two groups of support trusses, and symmetrical slide rails on the two groups of support trusses; a large-scale model connected between the two slide rails through an inter-row spacing adjusting device and an inclination adjusting device, a large-scale model assembly fixed through detachable force transmission plates at the upper and lower ends of the large-scale model, and the force transmission plates connected with a force balance; the large-scale model is provided with a pressure measuring hole, and the scale ratio of the large-scale model is greater than 1:20; The data acquisition device is internally provided with a wind pressure sensor, the data acquisition device is connected with the pressure measuring hole of the large-scale model through the pressure measuring pipe, and the wind pressure is transmitted to the wind pressure sensor of the data acquisition device through the pressure measuring pipe.

[0007] In an embodiment, the support device further comprises two sets of guide plates symmetrically arranged on the aerodynamic surface of the two sets of support trusses and rigidly connected with the support trusses through fastening assemblies.

[0008] In an embodiment, the inclination adjusting device comprises a coaxially assembled disc connector, a base plate and a fixed guide column, one end of the fixed guide column is fixed on the force transmission plate, and the disc connector, the base plate and the row spacing adjusting device are arranged on the fixed guide column.

[0009] In an embodiment, a plurality of first bolt holes are arranged circumferentially on the disc connector, a plurality of second bolt holes are arranged on the base plate corresponding to the first bolt holes of the disc connector, the base plate and the disc connector are fixedly connected through bolts passing through the first bolt holes and the second bolt holes, the disc connector is rigidly connected with the force balance through fastening members, and the inclination is adjusted by rotating the disc connector to drive the large-scale model to rotate around the axis to a target angle and then locking the bolts.

[0010] In an embodiment, the first bolt holes and the second bolt holes are arranged at equal intervals in a ring shape.

[0011] In an embodiment, the row spacing adjusting device comprises an adjusting plate clamped in the sliding rail, a guide hole is arranged on the adjusting plate, the adjusting plate is arranged on the fixed guide column through the guide hole, and the adjusting plate and the base plate are connected through bolts.

[0012] In an embodiment, flange connection parts are formed at the horizontal ends of the adjusting plate, and the adjusting plate is fixed on the support truss by fastening members after being moved to a target position in the sliding rail. Alternatively, a lock structure or a welded interface is arranged at the horizontal ends of the adjusting plate, and the adjusting plate is fixed on the support truss after being moved to a target position in the sliding rail.

[0013] In an embodiment, the large-scale model comprises a plurality of model components, and the model components are fixedly connected in the vertical plane direction through buckle members.

[0014] In an embodiment, the support device is a steel structure.

[0015] Based on the same inventive concept, a debugging method for the large-scale model wind tunnel test device is also provided, which comprises the following steps: The large-scale model wind tunnel test device is built in the wind tunnel test section; The large-scale model is adjusted to the required row spacing and inclination angle for simulation test through the row spacing device and the inclination adjusting device. By changing the test wind speed in the wind tunnel test section, the surface wind pressure distribution and overall wind load of the large-scale model under different wind speeds were simulated. After obtaining the data, the wind was stopped and the test was paused. Repeat the previous step until all test conditions are completed.

[0016] Compared with existing technologies, the advantages of this invention are as follows: In the aforementioned large-scale model wind tunnel testing device, the large-scale model is connected and fixed to the support device, and the array spacing and installation tilt angle required for the test are set using the row spacing adjustment device and the tilt angle adjustment device to simulate the configuration of a real structural array. After completing a wind tunnel test with a specific spacing-tilt angle combination, the device can be quickly adjusted to the next set of test parameters, thereby efficiently completing wind tunnel tests of components of different specifications under various spacings and tilt angles. In addition, this device is also suitable for wind tunnel testing of prototype large-scale models, possessing wide applicability. During the test, the data acquisition system simultaneously monitors the overall wind load and surface wind pressure distribution of the large-scale model under the action of incoming wind. The obtained data is used to verify the reliability of the large-scale model structural system, providing a real and reliable basis for the design of components and support structures. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a first three-dimensional schematic diagram of the large-scale model wind tunnel test device of the present invention; Figure 2 for Figure 1 A magnified view of a portion at point A; Figure 3 for Figure 1 A magnified view of section B; Figure 4 This is a first three-dimensional schematic diagram of the large-scale model wind tunnel test device of Embodiment 1 of the present invention; Figure 5 This is a first three-dimensional schematic diagram of a large-scale model of Embodiment 1 of the present invention; Figure 6 This is a first three-dimensional schematic diagram of the large-scale model wind tunnel test device of Embodiment 2 of the present invention; Figure 7 This is a first three-dimensional schematic diagram of a large-scale model of Embodiment 2 of the present invention; Figure 8 This is a schematic diagram of the tilt angle adjustment device of the large-scale model wind tunnel test apparatus of the present invention.

[0019] Reference numeral: 1, large-scale model; 11, large-scale model; 12, pressure measuring hole; 13, pressure measuring pipe; 2, support device; 20, support truss; 21, support column; 22, sliding rail; 3, data acquisition device; 31, force balance; 4, flow guide plate; 5, row spacing adjusting device; 51, adjusting plate; 511, flange connection; 6, inclination adjusting device; 61, disc connector; 62, base plate; 611, first bolt hole; 612, second bolt hole; 63, fixed guide column; 7, force transmission plate. DETAILED DESCRIPTION

[0020] In order to facilitate the understanding of the present application, the following will be more fully and specifically described in conjunction with the drawings of the specification and the preferred embodiments, but the protection scope of the present application is not limited to the following specific embodiments.

[0021] Unless otherwise defined, all the professional terms used in the following have the same meaning as generally understood by those skilled in the art. The professional terms used in this paper are only for the purpose of describing specific embodiments and are not intended to limit the protection scope of the present application.

[0022] Unless otherwise specified, various raw materials, reagents, instruments and equipment used in the present application can be purchased from the market or can be prepared by existing methods.

[0023] Example 1 Please refer to Figures 1-8 The large-scale model wind tunnel test device of an embodiment includes a large-scale model 1, a data acquisition device 3 for measuring parameters of the large-scale model 1, a support device 2, a flow guide plate 4 installed on the support device, a row spacing adjusting device 5 for adjusting the large-scale model 1, an inclination adjusting device 6 for adjusting the large-scale model 1, and a force transmission plate 7 for bearing the large-scale model. Specifically, the support device 2 includes two sets of support trusses 20 composed of a main beam and an anchoring structure, a plurality of support columns 21 connecting the two sets of support trusses 20, and symmetrically arranged sliding rails 22 on the two sets of support trusses. The large-scale model is connected between the two sliding rails 22 through the row spacing adjusting device 5 and the inclination adjusting device 6, and the large-scale model 7 assembly is fixed at the upper and lower ends of the large-scale model 1 through detachable force transmission plates 7, which are connected with the force balance 31. The large-scale model 1 is provided with a pressure measuring hole 12, and the scale ratio of the large-scale model is greater than 1:20. The data acquisition device 3 is built-in with a wind pressure sensor, the data acquisition device 3 is connected with the pressure measuring hole 12 of the large-scale model 1 through the pressure measuring pipe 13, and the wind pressure is transmitted to the wind pressure sensor of the data acquisition device 3 through the pressure measuring pipe 13.

[0024] Specifically, in the present embodiment, the large-scale model is a photovoltaic panel model, which can be simulated by a large-scale model panel receiving solar radiation or directly by a large-scale model prototype. The row spacing adjustment device 3 is arranged opposite to the truss structure of the support device 2 to support both ends of the photovoltaic panel model. Thus, different types of photovoltaic panel models are used to test different types of photovoltaic simulation structures. Considering that the optimal range of the direct sunlight angle is -30°~30°. These photovoltaic panel models are fixed laterally between the two groups of support trusses 20 by the connecting device, and the row spacing adjustment device 5 and the inclination adjustment device 6 are used to achieve the required array spacing and installation inclination setting for the test, so as to simulate the configuration of the real photovoltaic array. After completing the wind tunnel test of a specific spacing-inclination combination, the device can be quickly adjusted to the next set of test parameters, so as to efficiently complete the wind tunnel test of different specifications of components under various spacings and inclinations.

[0025] Preferably, the support device 2 is used as the main bearing structure of the large-scale model, which is made of steel to provide structural stability.

[0026] Preferably, in order to avoid the interference of the support device 2 with the incoming flow wind during the test in the wind tunnel test section, the opposite aerodynamic surface of the support device 2 is provided with a flow guide plate 4 to ensure that the wind can quickly pass through the large-scale model 1. More preferably, the working surface of the flow guide plate 4 is polished to reach the standard of aerodynamic smooth surface, and the installation flatness error thereof is controlled within a reasonable range.

[0027] Preferably, the inclination adjustment device 6 comprises a coaxially assembled disc connector 61, a base plate 62 and a fixed guide column 63, one end of the fixed guide column 63 is fixed on the force transmission plate 7, and the disc connector 61, the base plate 62 and the row spacing adjustment device 5 are arranged on the fixed guide column 63.

[0028] In an embodiment, a plurality of first bolt holes 611 are arranged circumferentially on the disc connector 61, a plurality of second bolt holes 612 are arranged on the base plate 62 corresponding to the first bolt holes 611 of the disc connector 61, the disc connector 61 and the base plate 62 are fixed by bolts passing through the first bolt holes 611 and the second bolt holes 612, the disc connector 61 is rigidly connected with the force measuring balance 31 by fasteners, and the inclination adjustment is realized by rotating the disc connector 61 to rotate the large-scale model 1 to the target angle and then locking the bolts.

[0029] Preferably, the first bolt holes 611 and the second bolt holes 612 are arranged in an equidistant annular manner.

[0030] Specifically, in an embodiment, the row spacing adjustment device 5 is detachably assembled on the support truss 20 through the slide rail 22, and the continuous adjustment of the row spacing of the large-scale model array is realized by the axial displacement of the slide rail 22.

[0031] Specifically, the row spacing adjusting device 5 comprises an adjusting plate 51 clamped in the slide rail 22, the adjusting plate 51 is provided with a guide hole, the adjusting plate 51 is arranged on the fixed guide column 63 through the guide hole, and the adjusting plate 51 is connected with the bottom plate 62 through bolts.

[0032] In an embodiment, flange connecting portions 511 are formed at the horizontal two ends of the adjusting plate 51, and the adjusting plate 51 is fixed on the support truss 20 by using fasteners after being moved to a target position in the slide rail 22. Alternatively, the horizontal two ends of the adjusting plate 51 are provided with a lock structure or a welded interface, and the adjusting plate 51 is fixed on the support truss 20 after being moved to a target position in the slide rail 22. Of course, other connection modes can also be used, which are not described one by one.

[0033] Embodiment 2 Based on the same inventive concept, the application also provides a large-scale model wind tunnel test device for measuring aerodynamic force coefficients and wind pressure distribution of a bridge segment model. Compared with embodiment 1, the large-scale model wind tunnel test device in embodiment 2 remains consistent in the overall architecture, and the main difference lies in that the large-scale model 1 used in embodiment 2 is a bridge segment model suitable for testing the aerodynamic characteristics of a bridge. By replacing the bridge segment model with different types, the stress state of various bridge structures in a specific wind field environment can be simulated, and then key test data such as the aerodynamic force coefficients and surface wind pressure distribution characteristics of the bridge segment can be obtained, thereby realizing the special research on the wind-induced vibration characteristics of the bridge.

[0034] Embodiment 3 The debugging method of the large-scale model wind tunnel test device in an embodiment comprises the following steps: S10, the large-scale model wind tunnel test device is built in the wind tunnel test section; S20, the large-scale model is adjusted to the required row spacing and inclination angle for simulation test by using the row spacing device and the inclination angle adjusting device; S30, the surface wind pressure distribution and the overall wind load of the large-scale model under different wind speeds are simulated by changing the test wind speed in the wind tunnel test section, the test is stopped after the data of this time is obtained; S40, repeat the previous step until all test conditions are completed.

[0035] In this embodiment, the row spacing and the inclination angle of the large-scale model 1 are adjusted, and the wind is turned on again after the adjustment of the working condition is completed, until the working condition is completed. By analyzing and processing the data under different working conditions, the overall wind load and the surface wind pressure distribution of the large-scale model 1 can be obtained.

[0036] The debugging method of the large-scale model wind tunnel test device greatly improves the efficiency, enhances the flexibility, and ensures the safety of the operation. The key pain points in the large-scale model wind tunnel test are effectively solved, real and reliable multi-working-condition wind dynamic test data can be obtained, and the method has been implemented in multiple projects.

[0037] The above is only an embodiment of the present application and is not used to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A large scale model wind tunnel test apparatus, characterized by, The utility model relates to a large scale model wind tunnel test device, which comprises a support device, a large scale model, a data acquisition device and a force balance. The support device comprises two groups of support trusses composed of main beams and anchoring structures, a plurality of support columns connecting the two groups of support trusses, and slide rails symmetrically arranged on the two groups of support trusses. The large scale model is connected between the two slide rails through a row spacing adjusting device and an inclination adjusting device, and is fixed on the large scale model assembly at the upper and lower ends of the large scale model through detachable force transmission plates connected with the force balance. The large scale model is provided with pressure measuring holes, and the scale ratio of the large scale model is greater than 1:

20.

2. The large scale model wind tunnel testing apparatus of claim 1, wherein, The data acquisition device is provided with an air pressure sensor, and the data acquisition device is connected with the pressure measuring holes of the large scale model through a pressure measuring pipe.

3. The large scale model wind tunnel testing apparatus of claim 1, wherein, The support device further comprises two groups of guide plates symmetrically arranged on the aerodynamic surfaces of the two groups of support trusses and rigidly connected with the support trusses through fastening assemblies.

4. The large scale model wind tunnel testing apparatus of claim 3, wherein, The inclination adjusting device comprises a coaxially assembled disc connecting piece, a base plate and a fixed guide column, one end of the fixed guide column is fixed on the force transmission plate, and the disc connecting piece, the base plate and the row spacing adjusting device are arranged on the fixed guide column.

5. The large scale model wind tunnel testing apparatus of claim 4, wherein, A plurality of first bolt holes are formed in the circumferential direction of the disc connecting piece, a plurality of second bolt holes are formed in the base plate corresponding to the first bolt holes of the disc connecting piece, the base plate and the disc connecting piece are fixedly connected through bolts passing through the first bolt holes and the second bolt holes, the disc connecting piece is rigidly connected with the force balance through fasteners, and the inclination is adjusted by rotating the disc connecting piece to drive the large scale model to rotate around the axis to the target angle and then locking the bolts.

6. The large scale model wind tunnel testing apparatus of claim 3, wherein, The first bolt holes and the second bolt holes are arranged at equal intervals in a ring shape.

7. The large scale model wind tunnel testing apparatus of claim 6, wherein, The row spacing adjusting device comprises an adjusting plate clamped in the slide rail, the adjusting plate is provided with guide holes, the adjusting plate is arranged on the fixed guide column through the guide holes, and the adjusting plate and the base plate are connected through bolts. The horizontal ends of the adjusting plate form flange connecting parts, and the adjusting plate is fixed on the support truss after being moved to the target position in the slide rail through fasteners, 8. The large scale model wind tunnel testing apparatus of claim 1, wherein, Or, the horizontal ends of the adjusting plate are provided with lock structures or welded interfaces, and the adjusting plate is fixed on the support truss after being moved to the target position in the slide rail.

9. The large scale model wind tunnel testing apparatus of claim 1, wherein, The large scale model comprises a plurality of model assemblies, and the model assemblies are fixedly connected in the vertical plane direction through buckle pieces. The support device is a steel structure.

10. A debugging method of the large scale model wind tunnel test device according to any one of claims 1-9, comprising: building the large scale model wind tunnel test device in the wind tunnel test section; adjusting the large scale model to the required row spacing and inclination through the row spacing device and the inclination adjusting device; simulating the surface air pressure distribution and the overall wind load of the large scale model under different wind speeds by changing the test wind speed in the wind tunnel test section, stopping the test after obtaining the data of this time, and stopping the test; repeating the above steps until all test conditions are completed.

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