Water tank device for simulating dynamic characteristics of water in open channel, and operation method

Abstract

The invention discloses a water tank device for simulating the dynamic characteristics of water in an open channel, and an operation method, and belongs to the field of environmental fluid mechanics.According to the invention, an adjustable motor drives a rotating wheel at the bottom of a water tank to generate the shear force so as to drive a water flow in a tank to move, so that the flow rate in the tank is increased from the bottom layer to the surface layer of the tank, wherein the characteristics of the vertical flow rate of a natural river channel are met. Meanwhile, in order to weakenthe unequal characteristics of the secondary flow and the flow rate of the water tank in the radial direction, a straight-channel section is arranged in the water tank, and a linear flow path is increased. As a result, the flow rate tends to be uniform along the transverse distribution direction. The device disclosed by the invention not only can be applied to the research on the water flow and hydrodynamic characteristics, but also can be applied to related mechanism tests such as water quality and water environment. The invention has the technical advantages that the water tank is fixed, andthe water flow is driven by the rotating wheel at the bottom of the water tank to move. Therefore, the characteristics of the vertical flow rate of the natural river channel are better met. The device is simple in structure and control system, low in cost and high in operability.

Description

Technical field [0001] The invention belongs to the field of environmental fluid mechanics, and more specifically, relates to a water tank device and an operation method for simulating the hydrodynamic characteristics of an open channel. Background technique [0002] In recent decades, the study of sediments in water bodies has always been a subject of common concern for environmental sciences and water conservancy sciences. The study of the impact of external dynamic disturbances on sediments mainly adopts two types of methods: field observation and indoor simulation. Due to the strong randomness and uncontrollability of conditions such as wind, waves and currents, field observations often produce relatively large systematic errors and impose relatively large limitations on theoretical analysis. Therefore, they are generally only used for investigation and verification research. At present, relevant theoretical research based on dynamic mechanism is often carried out by indoor s...

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Problems solved by technology

At present, most of the existing annular tanks are used to study the sediments under the influence of wind-induced currents in lakes. For example, the Chinese patent 201320818449.X published on May 28, 2014, the driving device is located on the surface of the water body, and the part of the device in contact with the water body is relatively small. , under the same power condition, the flow rate of the water flow formed is small, and the efficiency of the motor is not high

Another example is the Chinese patent 201710356492.1 with a publication date of September 29, 2017, which discloses a simulation device and method for environmental and ecological hydraulic flow rate tests. Its flow rate generating device consists of a frequency converter, a frequency conversion motor, a nylon plastic rod, an umbrella It consists of a gear set, a plastic marine propeller, and a horizontal bearing. The propeller is set parallel to the water surface. In this simulation method, the flow velocity on the plane where the propeller is located is high and other places are relatively small, and the water flow structure is quite different from the natural river.

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