A low-turbulence compact circulating water tunnel experimental device

Abstract

The invention discloses a low-turbulence compact circulating water tunnel experimental device, comprising a water tank (1), a centrifugal pump (7), and a porous plate (2) and a honeycomb screen (3) which are disposed in the water tank (1). The water tank (1) has a water inlet at the upper part and a water outlet at the lower part at the same side. The porous plate (2) is installed between the water inlet and the water outlet. The honeycomb screen (3) is installed at the water outlet, and has an outlet successively connected a contraction section (4), an experimental section (5) and an expansion section (6). The outlet of the expansion section (6) is connected to the inlet of the centrifugal pump (7). The outlet of the centrifugal pump (7) is successively connected with a backflow section(8), a round-to-square section (9) and a diverging section (10). The outlet of the diverging section (10) is connected to the water inlet of the water tank (1). The hydrodynamic design used by the invention greatly reduces the turbulence of a flow field in the experimental section. The whole experimental device has a compact structure, a small occupied space and low manufacturing cost, which greatly improves the applicability of the water tunnel experimental device.

Description

technical field [0001] The invention belongs to the field of hydrodynamic experiment research, in particular to a low-turbulence compact circulating water tunnel experimental device. Background technique [0002] In the field of research related to hydrodynamics, a water tunnel experimental device with good performance is the key equipment to obtain important flow laws and experimental results. There are two main structural forms of the water tunnel: one is the vertical water tunnel, the water flows from the steady flow section through the contraction section by gravity, and flows into the experimental section at a certain speed, also known as the gravity water tunnel; the other is the circulating water tunnel. The water flow is driven by the power equipment to flow through the stable section, the contraction section, the experimental section and other structures in turn, and through the return pipe to form a cycle. Due to the high construction cost and large space occupati...

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Problems solved by technology

Due to the high construction cost and large space occupation of vertical water tunnels, and the fact that the flow velocity in the experimental section changes with the water level, most existing water tunnels adopt a circular design

[0003] The advantages of the circulating water tunnel are high flow rate and large flow rate, but it is driven by power equipment, and it is difficult to eliminate the interference to the flow. Usually, the quality of the flow field in the experimental section is low

Existing circulating water tunnels often reduce water flow disturbance by designing complex rectification devices at the inlet or extending the outlet pipes of power equipment, which not only increases the occupied space of the water tunnel, but also dramatically increases the manufacturing cost. Reduced applicability of water tunnel experiment setup

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