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Vertical pressurized temperature adjustable experimental water tunnel

A temperature adjustment and experiment technology, applied in the field of hydrodynamic experiment technology research, can solve problems such as inability to simulate temperature, and achieve the effects of simple support frame, reduced floor space, and easy processing

Active Publication Date: 2019-05-07
NANJING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] At present, in research institutes and colleges and universities, most of the fluid experiments are carried out in open water tunnels, that is to say, the upper liquid surface is in contact with the outside air. This kind of water tunnel can meet the needs of experiments such as floating on the water surface and diving near the water surface. , but it cannot simulate deep seawater and uniform incoming flow field with variable temperature and Reynolds number

Method used

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  • Vertical pressurized temperature adjustable experimental water tunnel
  • Vertical pressurized temperature adjustable experimental water tunnel
  • Vertical pressurized temperature adjustable experimental water tunnel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Such as figure 1 and figure 2 As shown, the total height of the vertical pressurized temperature-adjustable experimental water tunnel is 2160.8mm, and the total length is 5407mm, including the first elbow 1, the diverging section 3, the experimental section, the contracting section 7, the vortex breaking and rectifying section 8, and the second bend Head 10, third elbow 11, temperature regulating section 13, fourth elbow 18, temperature regulating device and power unit, wherein the first elbow 1, the second elbow 10, the third elbow 11 and the fourth elbow 18 all form a 90° corner, and the two ends of the first elbow are fixedly connected to the divergent section 3 and the fourth elbow 18 through flanges respectively, and a vertically upward water injection port 2 is arranged on the upper part, which can also be used as a pressure relief valve. A valve is installed on the water injection port, and the specific dimensions of the first elbow are as follows: image 3 As...

Embodiment 2

[0037] In this embodiment, on the basis of Embodiment 1, a CCD is installed on the outer frame of the experimental section to monitor the evolution of the flow field around the experimental section, and a stress sensor is installed to detect the deformation and force of the model.

Embodiment 3

[0039] In this embodiment, on the basis of Embodiment 2, flow field structure measurement and hydrodynamic parameter measurement systems such as multi-component stress balance, laser Doppler velocimetry (LDV) and particle image velocimetry (PIV) are added to the water tunnel. Steps:

[0040] When operating, first connect the various parts as shown in the figure, and fill the gap with polytetrafluoroethylene gaskets to prevent water leakage when connecting, install the bracket and the model body to be tested on the bracket in the experimental section, such as a submarine model , and select the required shape and size of the experimental section according to the requirements, close the drain valve, and inject water into the water injection port on the upper side. You can add a suitable proportion of sodium chloride or copper sulfate in the water to prepare a weak electrolyte solution according to your needs, or you can add it to the model body. Potassium permanganate is injected...

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Abstract

The present invention discloses a vertical pressure-bearing temperature-controllable experimental water tunnel. The vertical pressure-bearing temperature-controllable experimental water tunnel comprises a first bend, a diverging section, an experimental section, a contraction section, a vortex break-down and rectifying section, a second bend, a third bend, a temperature adjusting section and a fourth bend which are connected with one another sequentially so as to form a closed experimental water tunnel; the vertical pressure-bearing temperature-controllable experimental water tunnel further comprises a temperature adjusting device and a power device; the central axis of the experimental section is coaxial with the central axes of the horizontal sections of the first bend and the second bend; the temperature adjusting device is connected with the experimental water tunnel through a temperature adjusting opening arranged on the temperature adjusting section; the driving device comprises a driving motor and a propeller; the driving motor is connected with a propeller through a coupling; the coupling passes through a through hole formed in the fourth bend so as to arrange the driving motor at the external side of the fourth bend; the propeller is arranged in the temperature adjusting section; and the rotation central shaft of the blades of the propeller, the shaft of the motor and the central axis of the temperature adjusting section are coaxial. The water tunnel of the invention is easy to disassemble and move. With the water tunnel of the invention adopted, flow fields of different temperature, water depths, pressures and flow rates can be simulated.

Description

technical field [0001] The invention relates to the research field of hydrodynamic experiment technology, and specifically relates to a vertical water tunnel experiment system capable of adjusting temperature and pressure and simulating deep water ocean environment. Background technique [0002] The experimental water tunnel system with adjustable temperature and pressure can simulate the fluid flow state of the ocean environment within a certain range to conduct electromagnetic fluid propulsion and drag reduction control experiments. The electromagnetic fluid pressure and temperature can be adjusted according to requirements in the experiment. [0003] In the field of research related to fluid mechanics, water tunnels with good performance are the key technical means to obtain important experimental research results. Many important fluid flow laws (such as turbulent flow phenomena, vortex street evolution) are first obtained through experimental research. For example, peop...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01M10/00
CPCG01M10/00
Inventor 刘宗凯周本谋黄亚冬崔珂
Owner NANJING UNIV OF SCI & TECH