An experimental section of a teaching demonstration wind tunnel

Abstract

The present invention discloses an experimental section of a teaching demonstration wind tunnel, comprising a cave body, the cave body having openings at both ends, characterized in that it also comprises a through hole arranged on the cave body, an operating rod passing through the through hole, and a sealing device for sealing the through hole, the through hole being provided with an internal thread, and the sealing device being provided with an external thread used in conjunction with the internal thread of the through hole. The experimental section of the teaching demonstration wind tunnel of the present invention is provided with through holes respectively on two opposite sides of the cave body, so that a slender operating rod can be passed through the entire experimental section from the through hole, and the experimental model is controlled within the range of the experimental section by using the operating rod, so as to support models of different shapes, different materials, and different specifications to perform wind tunnel experiments and demonstrations of lift, drag, etc. The experimental section of the teaching demonstration wind tunnel of the present invention is small in size, simple in structure, low in cost, easy to disassemble and assemble, easy to move, simple to operate, and suitable for classroom environments.

Description

Technical Field

[0001] The invention belongs to the technical field of teaching demonstration wind tunnels, and in particular relates to an experimental section of a teaching demonstration wind tunnel. Background Art

[0002] There is a great demand for teaching wind tunnels in my country's education and talent training. However, the wind tunnel laboratories in Chinese universities have always been mainly used as experimental sites for national and provincial and ministerial vertical scientific research funds and major engineering projects. The users are mainly university teachers, master's and doctoral students, and other related scientific researchers. The effectiveness of experimental teaching in elementary schools, junior high schools, high schools, and undergraduates has basically not been brought into play, there is a lack of relatively systematic demonstrations, and there are few opportunities to participate in their use. Summary of the invention

[0003] The purpose of the present invention is to provide a teaching demonstration wind tunnel experimental section, which is suitable for classroom teaching demonstration, solves the problems existing in the prior art, and facilitates teachers to conduct demonstration experiments in the classroom. The device is small in size, simple in structure, low in cost, easy to disassemble and assemble, easy to move, simple to operate, and suitable for classroom environment.

[0004] In order to achieve the above object, the technical solution adopted by the present invention is:

[0005] An experimental section of a teaching demonstration wind tunnel includes a cave body with openings at both ends. The invention is characterized in that the experimental section also includes a through hole arranged on the cave body, a joystick passing through the through hole and a sealing device for sealing the through hole. The through hole is provided with an internal thread, and the sealing device is provided with an external thread used in conjunction with the internal thread of the through hole.

[0006] Furthermore, the through holes are arranged on the upper side and the lower side of the hole body, and the upper side and the lower side are each provided with a plurality of the through holes, the aperture of the through holes is 2-7 mm, and the upper side is parallel to the lower side.

[0007] Furthermore, the sealing device is a hollow tube with one end open, and the open end of the hollow tube is provided with an external thread that cooperates with the internal thread of the through hole.

[0008] Furthermore, the length of the hollow tube is 2-5 cm.

[0009] Furthermore, the through holes are arranged in pairs on the upper side surface and the lower side surface, respectively, and a plurality of pairs of the through holes are arranged on the upper side surface and the lower side surface, respectively.

[0010] Furthermore, the length of the joystick is 2-5 cm longer than the maximum straight-line distance from the through hole arranged on the upper side to the through hole arranged on the lower side.

[0011] Due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0012] 1. The experimental section of the teaching demonstration wind tunnel of the present invention is provided with through holes on two opposite sides of the tunnel body. Through the through holes provided on two opposite sides, a slender operating rod can be passed through the entire experimental section from the through holes, so that the operating rod can pass through the experimental model placed in the tunnel body and also provided with through holes. During the experiment, the experimental model is controlled within the range of the experimental section, and models of different shapes, different materials, different specifications, etc. are supported to perform wind tunnel experiments on lift, drag, etc.;

[0013] 2. In the experimental section of the teaching demonstration wind tunnel of the present invention, the through holes on each side are arranged in pairs, so that at least two operating rods can be inserted in each experiment. In this way, at least two operating rods can be used to support the model during the experiment, so as to avoid the model being supported by a single operating rod, and the model will not rotate inappropriately under the action of wind force, thereby interfering with the experiment;

[0014] 3. In the experimental section of the teaching demonstration wind tunnel of the present invention, a through-hole sealing device is provided on each through-hole to seal the through-hole, so as to prevent the airflow in and out of the through-hole from affecting the experimental results during the experiment. The through-hole sealing device is simple in design, easy to use and low in cost;

[0015] 4. In the experimental section of the teaching demonstration wind tunnel of the present invention, the through holes on each side are not only arranged in pairs, but also multiple pairs of through holes are arranged on each side. Generally, 5-10 pairs are arranged on each side, arranged in two rows. In this way, during the experiment, the operating rod can select through holes in different positions on the two sides, so that the operating rod forms different inclinations with the horizontal plane in the experimental section, so that the model can complete different experimental tests under the support of the operating rod.

[0016] 5. The experimental section of the teaching demonstration wind tunnel of the present invention is simple in design, and a mounting hole is provided on each side, so that it is convenient to form a wind tunnel for different purposes with other components of the wind tunnel according to the purpose of the experiment to conduct experiments.

[0017] shi BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a structural schematic diagram of a teaching demonstration wind tunnel experimental section of the present invention.

[0019] Figure 2 A schematic diagram of a structure in which an operating rod is inserted into a teaching demonstration wind tunnel experimental section of the present invention and a sealing device is installed

[0020] Figure 3 The schematic diagram of the structure of inserting the operating rod and removing the sealing device in a teaching demonstration wind tunnel experimental section of the present invention is

[0021] Figure 4 This is an enlarged view of part A of the figure.

[0022] Figure numerals: 1-hole body, 11-upper side, 12-lower side, 2-through hole, 3-operating rod, 4-sealing device. DETAILED DESCRIPTION

[0023] The specific implementation of the present invention will be described in more detail below in conjunction with the schematic diagram. The advantages and features of the present invention will become clearer from the following description and claims. It should be noted that the drawings are all in a very simplified form and are not in exact proportions, and are only used to facilitate and clearly assist in explaining the purpose of the embodiments of the present invention.

[0024] Reference Figure 1-4 The present invention provides an experimental section of a teaching demonstration wind tunnel, comprising a cave body (1), the cave body (1) being open at both ends and being made of a transparent material, such as an acrylic plate. The experimental section of the teaching demonstration wind tunnel also comprises a through hole (2) arranged on the cave body (1), a joystick (3) passing through the through hole (2), and a sealing device (4) sealing the through hole (2), the through hole (2) being provided with an internal thread, and the sealing device (4) being provided with an external thread used in conjunction with the internal thread of the through hole (2). The through holes (2) are respectively arranged on the upper side surface (11) and the lower side surface (12) of two opposite side surfaces of the cave body (1), and the through holes (2) on each surface are arranged in pairs of two, and a plurality of pairs can be arranged on both the upper side surface (11) and the lower side surface (12) as needed. The experimental section of the teaching demonstration wind tunnel also includes an operating rod (3) passing through the through hole (2), and a through hole sealing device (4) for sealing the through hole (2). The sealing device (4) is connected to the through hole (2) by a thread, and the through hole (2) is provided with an internal thread. The sealing device (4) is a hollow tube with an open end, and the open end of the hollow tube has an external thread used in conjunction with the internal thread of the through hole (2). The other end of the hollow tube is a closed blind end. During the experiment, all the through holes (2) are sealed with the sealing device (4) to prevent the airflow in and out of the through hole (2) during the experiment from affecting the experimental results. The length of the hollow tube should not be too long, and is preferably within the range of 2-5 cm. When in use, after the experimental section of a teaching demonstration wind tunnel of the present invention is installed with other components of the wind tunnel, a group of through holes (2) are selected from the upper side (11) and the lower side (12) according to the requirements of the experiment, and then the sealing device (4), i.e. the hollow tube with external threads, on the through holes (2) is unscrewed and removed, and two operating rods (3) are respectively extended from a pair of through holes (2) on the upper side (11) into the interior of the cave body (1), and then the two operating rods (3) are passed through the pre-set holes on the experimental model and finally passed out from a group of through holes (2) on the lower side (12). At this time, the opened through holes (2) on the upper side (11) and the lower side (12) are sealed with the sealing device (4), i.e. the hollow tube with external threads, and then the fan is turned on to carry out the corresponding wind tunnel experiment.

[0025] The through holes (2) are arranged in pairs on the upper side surface (11) and the lower side surface (12) of the two opposite side surfaces of the hole body (1). A plurality of pairs of through holes (2) can be arranged on each side as required, for example, 5 to 10 pairs can be arranged on each side and arranged in two rows. In this way, during the experiment, the operating rod (3) can be selected to pass through the through holes (2) at different positions on the two sides, so that the operating rod (3) forms different inclinations with the horizontal plane in the experimental section, so that the model can complete different experimental tests under the support of the operating rod (3).

Claims

1. An experimental section of a wind tunnel for teaching demonstration, comprising a tunnel body (1), the tunnel body (1) being open at both ends, characterized in that It also comprises a through hole (2) arranged on the hole body (1), a control rod (3) passing through the through hole (2) and a sealing device (4) for sealing the through hole (2), the through hole (2) being provided with an internal thread, and the sealing device (4) being provided with an external thread for use with the internal thread of the through hole (2); The through holes (2) are arranged on the upper side surface (11) and the lower side surface (12) of the hole body (1); the upper side surface (11) and the lower side surface (12) are both provided with a plurality of the through holes (2); the aperture of the through holes (2) is 2-7 mm; the upper side surface (11) is parallel to the lower side surface (12); The sealing device (4) is a hollow tube with one end open, and the open end of the hollow tube is provided with an external thread that cooperates with the internal thread of the through hole (2); The hole body (1) is made of transparent material.

2. The experimental section of a teaching demonstration wind tunnel as described in claim 1, wherein the length of the hollow tube is 2-5 cm.

3. An experimental section of a teaching demonstration wind tunnel as described in claim 1, wherein the through holes (2) are arranged in pairs on the upper side surface (11) and the lower side surface (12), and a plurality of pairs of the through holes (2) are arranged on the upper side surface (11) and the lower side surface (12).

4. An experimental section of a teaching demonstration wind tunnel as claimed in any one of claims 1 to 3, wherein the length of the joystick (3) is 2-5 cm longer than the maximum straight-line distance from the through hole (2) arranged on the upper side (11) to the through hole (2) arranged on the lower side (12).

Images