Switch-on type and continuous inflow type dual-purpose density current test device and method

Abstract

The invention discloses a switch-on type and continuous inflow type dual-purpose density current test device and method. The device comprises a water storage tank, a vacuum pump, a sediment suspensioninstrument, a flowmeter, a flow guide pipe, a drain pipe, a valve switch, a water tank, pulleys, a guide rod and a guide rail. The device also comprises scale lines and a cross calibration line. Thetest method of the switch-on type and continuous inflow type dual-purpose density current test device comprises the following steps: the test preparation process, the test process, the instrument arrangement process and the data processing and analysis process. The device has the advantages of novel design, simple structure, good integrity, wide applicability to working conditions and high test accuracy; the device can simulate the switch-on type and continuous inflow type density current flow process under the influence of different density current concentration, bed roughness and topographicabrupt change and the continuous inflow type density current movement process under different degrees of gate opening; and the test process is easy to operate, the test efficiency is high and the test design is flexible.

Description

technical field [0001] The invention relates to the field of hydraulic model tests of offshore engineering, in particular to a dual-purpose differential density flow test device and method of a gate-opening type and a continuous inflow type. Background technique [0002] Density flow, also known as density flow, is a phenomenon in which one of the fluids flows along the interface due to the difference in density, and does not globally mix with other fluids during the flow process. Density flow can be divided into two types according to the cause of density difference: component-driven density flow and particle-driven density flow. Component-driven hyperpycnal flow can be further divided into hyperpycnal flow formed by salinity differences and temperature differences, such as saltwater wedges in estuaries and warm drainage from power plants; particle-driven hyperpycnal flows often include submarine turbidity currents, muddy water hyperpycnal flows, etc. . [0003] Hyperpycn...

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Problems solved by technology

[0004] Among the published patent schemes, a variety of open-gate type density flow tank systems have been proposed at home and abroad, but there is still a lack of technical solutions for open-gate and continuous inflow dual-purpose density flow test devices; Most of the open-gate and continuous inflow tests have problems such as a large number of device model components, complex structures, and high test costs caused by the need to recreate the model in each test process; at the same time, in the existing model test design, there are few Consider research on the technical scheme of the hyperpycnal flow process device under the coupling effect of the gate opening, the density of the hyperpycnal flow, the roughness of the bed, and the sudden change of the terrain

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