Multiphase flow vertical-type water hole with bi-directional flowing function

Abstract

The invention discloses a multiphase flow vertical-type water hole with a bi-directional flowing function. The multiphase flow vertical-type water hole comprises a power section, a backflow section, alower rectifying section, a lower diameter-variable section, a work section, an upper diameter-variable section, an upper rectifying section and an upper tank. In work, a second water pump is closed,a first water pump is started, a fluid in the water hole flows to the lower rectifying section, the lower diameter-variable section, the work section, the upper diameter-variable section and the upper rectifying sectionsequentially along the backflow section and then enters the upper tank for closed circulation; or the first water pump is closed, the second water is started, the fluid in the water hole flows to the upper rectifying section, the upper diameter-variable section, the work section, the lower diameter-variable section and the lower rectifying section sequentially along the upper tank and then enters the backflow section for closed circulation. According to the multiphase flow vertical-type water hole, the mode that the first water pump and the second water pump are arranged inparallel is adopted, the movement direction of the fluid is conveniently and rapidly converted; and water replenishing connecting pipes and particle solution connecting pipes are evenly distributed on the lower diameter-variable section and the upper diameter-variable section, the influences of flowing separation on the experimental result are prevented from water replenishment, and through adding of bubbles and particles, multiphase flowing is achieved.

Description

technical field [0001] The invention belongs to the technical field of fluid mechanics experiments, in particular, it relates to a multi-phase flow vertical water tunnel capable of bidirectional flow. Background technique [0002] More than 99% of flows in nature and engineering are multiphase flows. For multiphase flow problems, theoretical analysis results cannot be obtained, and experimental testing is the most reliable research method. Water tunnel is an important test system for multiphase flow experimental research, and the design and construction level of water tunnel directly affect the development of experimental research. [0003] At present, the water tunnels of universities, colleges and scientific research institutes usually adopt a horizontal structure arranged horizontally, which can only study the fluid characteristics of horizontal movement. The contraction section and the diffusion section of the traditional water tunnel have different structures, the flo...

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Problems solved by technology

The contraction section and the diffusion section of traditional water tunnels have different structures, the flow direction cannot be changed, it takes up a lot of space, and the investment cost is high, and only single-phase medium experiments can be carried out. For example, multiphase flow experiments usually require Using different structural forms will increase the input cost and bring difficulties to teaching and scientific research

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