CN205302771U - But reynolds experiment appearance of direct measurement pressure differential and velocity of flow - Google Patents
But reynolds experiment appearance of direct measurement pressure differential and velocity of flow Download PDFInfo
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Abstract
本实用新型涉及一种可直接测量压差和流速的雷诺实验仪，包括实验台、储水箱、恒压水箱和连接水管，储水箱设置在实验台下方，恒压水箱设置在储水箱上方，储水箱和恒压水箱之间相连通；实验台下方设有抽水机，与恒压水箱相连通；储水箱的一侧设有回水池，回水池与储水箱相连通；恒压水箱内设有溢流板，溢流板的一侧设有隔板，溢流板与隔板之间形成空间；隔板的一侧与溢流板相邻，另一侧设有示踪小水箱，恒压水箱一侧外部设有实验管，示踪小水箱与实验管相通；实验管上依次开设有第一测压孔、测速孔和尾阀，第一测压孔与压差计相连通，测速孔与毕托管相连通；本实用新型能够保持平稳水流，减少测量误差，减少使用实验辅助仪器。
The utility model relates to a Renault experimental instrument which can directly measure pressure difference and flow velocity, comprising an experimental bench, a water storage tank, a constant pressure water tank and connecting water pipes, the water storage tank is arranged under the experimental bench, the constant pressure water tank is arranged above the water storage tank, The water tank is connected to the constant pressure water tank; there is a water pump under the test bench, which is connected to the constant pressure water tank; there is a backwater pool on one side of the water storage tank, and the backwater pool is connected to the water storage tank; the constant pressure water tank is equipped with an overflow One side of the overflow plate is provided with a partition, and a space is formed between the overflow plate and the partition; one side of the partition is adjacent to the overflow plate, and the other side is provided with a tracer small water tank, and a constant pressure water tank There is an experimental tube on the outside of the side, and the tracer small water tank is connected with the experimental tube; the first pressure measuring hole, the velocity measuring hole and the tail valve are opened in sequence on the experimental tube, the first pressure measuring hole is connected with the differential pressure gauge, and the velocity measuring hole is connected with the end valve. The trusteeship is connected; the utility model can maintain a stable water flow, reduce measurement errors, and reduce the use of experimental auxiliary instruments.
Description
技术领域 technical field
本实用新型涉及一种可直接测量压差和流速的雷诺实验仪，属于一种流体力学实验教学装置。 The utility model relates to a Renault experimental instrument which can directly measure pressure difference and flow velocity, which belongs to a fluid mechanics experiment teaching device.
背景技术 Background technique
雷诺实验仪是一种用来观察层流和紊流流动特征及转变情况的一种装置，也用来测定层流和紊流两种流态的水头损失与断面平均流速之间的关系。 The Reynolds tester is a device used to observe the characteristics and transformation of laminar and turbulent flow, and also to measure the relationship between the head loss of laminar flow and turbulent flow and the cross-sectional average flow velocity.
目前实验室使用最广的是一种通过测量压差和流量来描述水头损失和断面平均流速关系的一种装置。这种装置在水箱中采用水泵通过上水管将水直接送到恒压水箱中，由于水泵工作状态不平稳导致水流上升时有脉动现象水流不平稳。与恒压水箱相连通的实验管上装有压差计，读数时需采用实验室直尺手动测量，具体步骤是将直尺贴近压差计并保持其与实验台垂直，并且读数时视线应始终与液面平行；根据能量守恒方程(位置水头+压力水头+速度水头＝常数)，可得水头损失＝压差计高度差；这样由于人为因素使测量误差增大。测量流速需要两人配合，在一人按下秒表的同时另一人用大烧杯在出水口处接水，结束计时的同时停止接水；通过测量烧杯中水的质量m，求出水的体积V(V＝m/a,其中a为水的密度通常取为1)，通过秒表上的时间t求出流量Q(Q＝V/t),在根据实验管的断面面积A求出断面平均流速v(v＝Q/A)；由于流体溅出烧杯以及两人操作不同步等原因同样使实验误差增大。可以看出，现有的技术加大了实验过程中的测量误差，同时还用到了直尺，烧杯，秒表等实验装置外的辅助仪器使实验变得复杂繁琐。 At present, the most widely used in the laboratory is a device that describes the relationship between the head loss and the average flow velocity of the section by measuring the pressure difference and flow rate. This device adopts water pump in the water tank to send water directly to the constant pressure water tank through the upper water pipe. Because the water pump is not in a stable working state, there is a pulsation phenomenon when the water flow rises and the water flow is not stable. The test pipe connected to the constant pressure water tank is equipped with a differential pressure gauge. When reading, it is necessary to use a laboratory ruler to measure manually. The specific steps are to put the ruler close to the differential pressure gauge and keep it perpendicular to the test bench. When reading, the line of sight should always be Parallel to the liquid surface; according to the energy conservation equation (position head + pressure head + velocity head = constant), it can be obtained that the head loss = the height difference of the differential pressure gauge; this will increase the measurement error due to human factors. Measuring the flow rate requires the cooperation of two people. When one person presses the stopwatch, the other person uses a large beaker to receive water at the water outlet, and stops receiving water when the timing ends; by measuring the mass m of the water in the beaker, the volume V( V=m/a, where a is the density of water and usually taken as 1), the flow Q (Q=V/t) is obtained by the time t on the stopwatch, and the cross-sectional average flow velocity v is obtained according to the cross-sectional area A of the experimental tube (v=Q/A); The experimental error is also increased due to reasons such as the fluid splashing out of the beaker and the asynchronous operation of the two people. It can be seen that the existing technology increases the measurement error during the experiment, and at the same time, auxiliary instruments outside the experimental device such as rulers, beakers, and stopwatches are used to make the experiment complicated and cumbersome.
实用新型内容 Utility model content
本实用新型提供一种可直接测量压差和流速的雷诺实验仪，能够保持平稳水流，减少测量误差，减少使用实验辅助仪器。 The utility model provides a Reynolds experimental instrument which can directly measure the pressure difference and the flow velocity, which can maintain a stable water flow, reduce measurement errors, and reduce the use of experimental auxiliary instruments.
本实用新型解决其技术问题所采用的技术方案是： The technical scheme that the utility model solves its technical problem adopts is:
一种可直接测量压差和流速的雷诺实验仪，所述可直接测量压差和流速的雷诺实验仪包括实验台、储水箱、恒压水箱和连接水管，所述储水箱设置在实验台下方，所述恒压水箱设置在储水箱上方，所述储水箱和恒压水箱之间通过连接水管相连通；所述实验台下方设有抽水机，所述抽水机通过上水管与恒压水箱相连通；所述储水箱的一侧设有回水池，所述回水池通过回水管与储水箱相连通；所述恒压水箱内设有溢流板，所述溢流板的一侧设有隔板，所述溢流板与隔板之间形成空间；所述隔板的一侧与溢流板相邻，其另一侧设有示踪小水箱，所述恒压水箱一侧外部设有实验管，所述示踪小水箱通过示踪水箱管道与实验管相通；所述实验管上依次开设有第一测压孔、测速孔和尾阀，所述第一测压孔与压差计相连通，测速孔与毕托管相连通，所述压差计与毕托管一侧均设有高程对比尺；所述实验管的一端与恒压水箱连通，其另一端与回水池中心处相对应； A Reynolds tester that can directly measure differential pressure and flow velocity, the Reynolds tester that can directly measure differential pressure and flow velocity includes a test bench, a water storage tank, a constant pressure water tank and connecting water pipes, and the water storage tank is arranged under the test bench , the constant pressure water tank is arranged above the water storage tank, and the water storage tank and the constant pressure water tank are connected through a connecting water pipe; a water pump is arranged below the test bench, and the water pump is connected with the constant pressure water tank through an upper water pipe; One side of the water storage tank is provided with a return pool, and the return pool is connected to the water storage tank through a return pipe; an overflow plate is provided in the constant pressure water tank, and a partition is provided on one side of the overflow plate. A space is formed between the overflow plate and the partition; one side of the partition is adjacent to the overflow plate, and a small tracer water tank is provided on the other side, and an experimental tube is provided outside one side of the constant pressure water tank. , the tracer small water tank communicates with the experimental pipe through the tracer water tank pipeline; the first pressure measurement hole, the velocity measurement hole and the tail valve are successively opened on the described experimental pipe, and the first pressure measurement hole is connected with the differential pressure gauge , the speed measuring hole is connected with the Pitot tube, and the differential pressure gauge is provided with an elevation contrast scale on one side of the Pitot tube; One end of the experimental tube is connected with the constant pressure water tank, and the other end is corresponding to the center of the return pool;
作为本实用新型的进一步优选，所述溢流板与隔板之间形成的空间内堆有玻璃球； As a further preference of the present utility model, glass balls are stacked in the space formed between the overflow plate and the partition;
作为本实用新型的进一步优选，所述上水管与恒压水箱的连通口设置在溢流板与隔板之间； As a further preference of the present utility model, the communication port between the upper water pipe and the constant pressure water tank is arranged between the overflow plate and the partition;
作为本实用新型的进一步优选，所述上水管上设有入水阀门； As a further preference of the present utility model, a water inlet valve is provided on the upper water pipe;
作为本实用新型的进一步优选，所述示踪小水箱内装有红色示踪剂，所述实验管与恒压水箱连接处设为喇叭形入口，所述喇叭形入口中心处设有针头； As a further preference of the present utility model, the tracer small water tank is equipped with a red tracer, and the connection between the experimental tube and the constant pressure water tank is set as a horn-shaped entrance, and a needle is provided at the center of the horn-shaped entrance;
作为本实用新型的进一步优选，所述毕托管上开设有第二测压孔，所述压差计与第二测压孔相连通；所述第二测压孔与喇叭形入口之间距离为65cm，所述第一测压孔与喇叭形入口之间距离为25cm，所述测速孔与第一测压孔之间距离为40cn； As a further preference of the present utility model, a second pressure measuring hole is provided on the Pitot tube, and the differential pressure gauge communicates with the second pressure measuring hole; the distance between the second pressure measuring hole and the trumpet-shaped inlet is 65cm, the distance between the first pressure measuring hole and the horn-shaped inlet is 25cm, and the distance between the speed measuring hole and the first pressure measuring hole is 40cm;
作为本实用新型的进一步优选，所述高程对比尺两侧均设有刻度，并均可沿压差计、毕托管进行移动。 As a further preference of the present utility model, scales are provided on both sides of the elevation contrast ruler, and both sides can move along the differential pressure gauge and the pit tube.
通过以上技术方案，相对于现有技术，本实用新型具有以下有益效果： Through the above technical solutions, compared with the prior art, the utility model has the following beneficial effects:
本实用新型通过在隔板与溢流板中堆叠圆形玻璃球可获得较平稳的水流；通过毕托管与压差计一侧压力计的读数的高度差即可求得流速(根据公式0.5mv2＝mgΔh)，从而减小人为测量产生的误差。通过在压差计和毕托管旁侧安装高程比对尺，可直接读出压差计和毕托管的读数，同样减少了人为测量产生的误差；通过上述的实用新型技术方案，不需使用实验室的辅助仪器，使实验简单化可操作性强。 The utility model can obtain a relatively stable water flow by stacking circular glass balls in the partition and the overflow plate; the flow velocity can be obtained through the height difference between the Pitot tube and the reading of the pressure gauge on one side of the differential pressure gauge (according to the formula 0.5mv 2 =mgΔh), so as to reduce the error caused by human measurement. By installing an elevation comparison ruler next to the differential pressure gauge and the Pitot tube, the readings of the differential pressure gauge and the Pitot tube can be directly read, which also reduces the error caused by artificial measurement; through the above-mentioned utility model technical scheme, no need to use the experimental The auxiliary equipment in the laboratory makes the experiment simple and operable.
附图说明 Description of drawings
下面结合附图和实施例对本实用新型进一步说明。 Below in conjunction with accompanying drawing and embodiment the utility model is further described.
图1是本实用新型的优选实施例的立体图； Fig. 1 is a perspective view of a preferred embodiment of the present utility model;
图中：1-实验台，2-储水箱，3-恒压水箱，4-抽水机，5-上水管，6-入水阀门，7-连接水管，8-回水池，9-回水管，10-溢流板，11-圆形玻璃球，12-隔板，13-示踪小水箱，14-示踪水箱管道，15-实验管，16-压差计，17-毕托管，18-高程对比尺，19-尾阀。 In the figure: 1-experimental platform, 2-water storage tank, 3-constant pressure water tank, 4-water pump, 5-upper water pipe, 6-water inlet valve, 7-connecting water pipe, 8-return water tank, 9-return water pipe, 10- Overflow plate, 11-circular glass ball, 12-partition, 13-tracer small water tank, 14-tracer water tank pipe, 15-experimental tube, 16-differential pressure gauge, 17-pitot tube, 18-elevation contrast Ruler, 19-tail valve.
具体实施方式 detailed description
现在结合附图对本实用新型作进一步详细的说明。这些附图均为简化的示意图，仅以示意方式说明本实用新型的基本结构，因此其仅显示与本实用新型有关的构成。 Now in conjunction with accompanying drawing, the utility model is described in further detail. These drawings are all simplified schematic diagrams, and only schematically illustrate the basic structure of the utility model, so they only show the configurations related to the utility model.
如图1所示，本实用新型的一种可直接测量压差和流速的雷诺实验仪，包括实验台1、储水箱2、恒压水箱3和连接水管7，所述储水箱2设置在实验台1下方，所述恒压水箱3设置在储水箱2上方，所述储水箱2和恒压水箱3之间通过连接水管7相连通；所述实验台1下方设有抽水机4，所述抽水机4通过上水管5与恒压水箱3相连通；所述储水箱2的一侧设有回水池8，所述回水池8通过回水管9与储水箱2相连通；所述恒压水箱3内设有溢流板10，所述溢流板10的一侧设有隔板12，所述溢流板10与隔板12之间形成空间；所述隔板12的一侧与溢流板10相邻，其另一侧设有示踪小水箱13，所述恒压水箱3一侧外部设有实验管15，所述示踪小水箱13通过示踪水箱管道14与实验管15相通；所述实验管15上依次开设有第一测压孔、测速孔和尾阀19，所述第一测压孔与压差计16相连通，测速孔与毕托管17相连通，所述压差计16与毕托管17一侧均设有高程对比尺18；所述实验管15的一端与恒压水箱3连通，其另一端与回水池8中心处相对应； As shown in Figure 1, a kind of Reynolds experiment instrument that can directly measure differential pressure and flow velocity of the present utility model comprises experiment platform 1, water storage tank 2, constant pressure water tank 3 and connecting water pipe 7, and described water storage tank 2 is arranged on the experiment Below the platform 1, the constant pressure water tank 3 is arranged above the water storage tank 2, and the water storage tank 2 and the constant pressure water tank 3 are connected through a connecting water pipe 7; a water pump 4 is arranged below the test bench 1, and the water pump 4 communicate with the constant pressure water tank 3 through the upper water pipe 5; a return pool 8 is provided on one side of the water storage tank 2, and the return pool 8 communicates with the water storage tank 2 through the return water pipe 9; the constant pressure water tank 3 An overflow plate 10 is provided, and one side of the overflow plate 10 is provided with a dividing plate 12, and a space is formed between the overflowing plate 10 and the dividing plate 12; Adjacent, its other side is provided with tracer small water tank 13, and described constant pressure water tank 3 one sides are provided with experiment pipe 15, and described tracer small water tank 13 communicates with experiment pipe 15 by tracer water tank pipeline 14; The first pressure measuring hole, the speed measuring hole and the tail valve 19 are successively opened on the test tube 15, the first pressure measuring hole communicates with the differential pressure gauge 16, the velocity measuring hole communicates with the Pitot tube 17, and the differential pressure gauge 16 and Pitot tube 17 sides are all provided with elevation contrast ruler 18; One end of described experiment pipe 15 is communicated with constant pressure water tank 3, and its other end is corresponding with return pool 8 centers;
作为本实用新型的进一步优选，所述溢流板10与隔板12之间形成的空间内堆有玻璃球，可使恒压水箱3中水流保持平稳； As a further preference of the present utility model, glass balls are stacked in the space formed between the overflow plate 10 and the partition 12, so that the water flow in the constant pressure water tank 3 can be kept stable;
作为本实用新型的进一步优选，所述上水管5与恒压水箱3的连通口设置在溢流板10与隔板12之间； As a further preference of the present utility model, the communication port between the upper water pipe 5 and the constant pressure water tank 3 is arranged between the overflow plate 10 and the partition plate 12;
作为本实用新型的进一步优选，所述上水管5上设有入水阀门6； As a further preference of the present utility model, a water inlet valve 6 is provided on the upper water pipe 5;
作为本实用新型的进一步优选，所述示踪小水箱13内装有红色示踪剂，所述实验管15与恒压水箱3连接处设为喇叭形入口，所述喇叭形入口中心处设有针头； As a further preference of the present utility model, the tracer small water tank 13 is equipped with a red tracer, and the connection between the experimental tube 15 and the constant pressure water tank 3 is set as a trumpet-shaped entrance, and a needle is provided at the center of the trumpet-shaped entrance. ;
作为本实用新型的进一步优选，所述毕托管17上开设有第二测压孔，所述压差计16与第二测压孔相连通；所述第二测压孔与喇叭形入口之间距离为65cm，所述第一测压孔与喇叭形入口之间距离为25cm，所述测速孔与第一测压孔之间距离为40cn； As a further preference of the present utility model, a second pressure measuring hole is provided on the Pitot tube 17, and the differential pressure gauge 16 communicates with the second pressure measuring hole; The distance is 65cm, the distance between the first pressure measuring hole and the horn-shaped inlet is 25cm, and the distance between the velocity measuring hole and the first pressure measuring hole is 40cm;
作为本实用新型的进一步优选，所述高程对比尺18两侧均设有刻度，并均可沿压差计16、毕托管17进行移动。 As a further preference of the present utility model, both sides of the elevation contrast ruler 18 are provided with scales, and both sides can move along the differential pressure gauge 16 and the pit tube 17 .
尾阀19用来调节水流大小，使实验管15中水流形成不同的流态；打开入水阀门6，抽水机4就不断的从储水箱2中抽水至恒压水箱3中，使得恒压水箱3中水的液面保持在一定高度并处于溢流状态，溢流的水通过连接水管7流到水箱中。 The tail valve 19 is used to adjust the size of the water flow, so that the water flow in the test tube 15 forms different flow states; when the water inlet valve 6 is opened, the water pump 4 will continuously pump water from the water storage tank 2 to the constant pressure water tank 3, so that the water in the constant pressure water tank 3 The liquid level of water is kept at a certain height and is in overflowing state, and the overflowing water flows in the water tank by connecting water pipe 7.
示踪小水箱13中的红色示踪剂通过示踪水箱管道14和出口端的针头流经恒压水箱3右侧的喇叭形入口到实验管15中，用来显示实验管15中水的流态。恒压水箱3由于水的高度保持一定故为恒定水压，实验管15中一段时间后会形成稳定水流，压差计16中液面会形成稳定高度差。移动高程比对尺至尺子刻度与压差计16凹液面相切，压差计16液面高程差即为沿程水头损失hf。毕托管17与压差计16右侧压力计的读数的高度差为Δh，根据公式0.5mv2＝mgΔh可求得流速v；进行多组测量，最终画出沿程水头损失hf与水流速度v的关系图。 The red tracer in the tracer small water tank 13 flows through the trumpet-shaped inlet on the right side of the constant pressure water tank 3 through the tracer water tank pipe 14 and the needle at the outlet end into the test tube 15 to display the flow state of the water in the test tube 15 . The constant pressure water tank 3 is constant water pressure because the height of the water remains constant, and a stable water flow can be formed after a period of time in the test tube 15, and the liquid level in the differential pressure gauge 16 can form a stable height difference. Move the height comparison ruler to the scale of the ruler to be tangent to the concave liquid surface of the differential pressure gauge 16, and the difference in elevation of the liquid surface of the differential pressure gauge 16 is the head loss hf along the way. The height difference between the Pitot tube 17 and the pressure gauge on the right side of the differential pressure gauge 16 is Δh, and the flow velocity v can be obtained according to the formula 0.5mv 2 = mgΔh; multiple sets of measurements are carried out, and finally the water head loss hf and the water flow velocity v along the way are drawn relationship diagram.
本实用新型通过在隔板12与溢流板10中堆叠圆形玻璃球11可获得较平稳的水流；通过毕托管17与压差计16一侧压力计的读数的高度差即可求得流速(根据公式0.5mv2＝mgΔh)，从而减小人为测量产生的误差。通过在压差计16和毕托管17旁侧安装高程比对尺，可直接读出压差计16和毕托管17的读数，同样减少了人为测量产生的误差；通过上述的实用新型技术方案，不需使用实验室的辅助仪器，使实验简单化可操作性强。 The utility model can obtain a relatively stable water flow by stacking circular glass balls 11 in the partition 12 and the overflow plate 10; the flow velocity can be obtained by the height difference between the readings of the pressure gauge on one side of the pit tube 17 and the differential pressure gauge 16 (According to the formula 0.5mv 2 =mgΔh), thereby reducing the error caused by human measurement. By installing an elevation comparison ruler on the side of the differential pressure gauge 16 and the Pitot tube 17, the readings of the differential pressure gauge 16 and the Pitot tube 17 can be directly read, which also reduces the error caused by artificial measurement; through the above-mentioned utility model technical scheme, There is no need to use auxiliary instruments in the laboratory, which makes the experiment simple and operable.
本技术领域技术人员可以理解，除非另外定义，这里使用的所有术语(包括技术术语和科学术语)具有与本申请所属领域中的普通技术人员的一般理解相同的意义。还应该理解的是，诸如通用字典中定义的那些术语应该被理解为具有与现有技术的上下文中的意义一致的意义，并且除非像这里一样定义，不会用理想化或过于正式的含义来解释。 Those skilled in the art can understand that, unless otherwise defined, all terms (including technical terms and scientific terms) used herein have the same meaning as commonly understood by those of ordinary skill in the art to which this application belongs. It should also be understood that terms such as those defined in commonly used dictionaries should be understood to have a meaning consistent with the meaning in the context of the prior art, and will not be interpreted in an idealized or overly formal sense unless defined as herein Explanation.
本申请中所述的“和/或”的含义指的是各自单独存在或两者同时存在的情况均包括在内。 The meaning of "and/or" in this application means that each exists alone or both exist simultaneously.
本申请中所述的“连接”的含义可以是部件之间的直接连接也可以是部件间通过其它部件的间接连接。 The meaning of "connection" in this application may be a direct connection between components or an indirect connection between components through other components.
以上述依据本实用新型的理想实施例为启示，通过上述的说明内容，相关工作人员完全可以在不偏离本项实用新型技术思想的范围内，进行多样的变更以及修改。本项实用新型的技术性范围并不局限于说明书上的内容，必须要根据权利要求范围来确定其技术性范围。 Inspired by the above ideal embodiment according to the utility model, through the above description content, relevant staff can completely make various changes and modifications within the scope of not deviating from the technical idea of the utility model. The technical scope of this utility model is not limited to the content in the description, but must be determined according to the scope of the claims.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107247156A (en) * | 2017-07-31 | 2017-10-13 | 长江大学 | A kind of flow rate measuring device and implementation based on pressure sensitive |
| CN108847097A (en) * | 2018-04-27 | 2018-11-20 | 吴爱兵 | A kind of physics teaching water flow measurement device |
| CN110274634A (en) * | 2019-07-22 | 2019-09-24 | 上海勘测设计研究院有限公司 | A kind of water quantity and quality measuring device for Underwater Emission mouth |
| CN111862740A (en) * | 2020-07-02 | 2020-10-30 | 桂林理工大学 | Remotely shareable Renault experimental platform |
| CN114067643A (en) * | 2021-11-17 | 2022-02-18 | 安徽师范大学 | Hydrodynamics comprehensive experiment device |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107247156A (en) * | 2017-07-31 | 2017-10-13 | 长江大学 | A kind of flow rate measuring device and implementation based on pressure sensitive |
| CN107247156B (en) * | 2017-07-31 | 2023-09-12 | 长江大学 | Implementation method for flow velocity measurement based on pressure sensing |
| CN108847097A (en) * | 2018-04-27 | 2018-11-20 | 吴爱兵 | A kind of physics teaching water flow measurement device |
| CN110274634A (en) * | 2019-07-22 | 2019-09-24 | 上海勘测设计研究院有限公司 | A kind of water quantity and quality measuring device for Underwater Emission mouth |
| CN111862740A (en) * | 2020-07-02 | 2020-10-30 | 桂林理工大学 | Remotely shareable Renault experimental platform |
| CN114067643A (en) * | 2021-11-17 | 2022-02-18 | 安徽师范大学 | Hydrodynamics comprehensive experiment device |
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