Novel gas-liquid mixed flow experimental device

Abstract

The invention belongs to the fluid dynamics apparatus technical field and relates to a novel gas-liquid mixed flow experimental device. An intermediate glass fiber tube and a downstream glass fiber tube are arranged between an upstream manhole and a downstream manhole as well as between the downstream manhole and a water reservoir respectively; the water reservoir is provided with a water return pipe; the water return pipe is communicated with the upstream manhole; a separation plate is arranged in the upstream manhole; the water return pipe is provided with a water pump and a flowmeter; the outlet of the upstream manhole is provided with a first valve; the inlet and outlet of the downstream manhole are provided with a second sluice valve and a third sluice valve respectively; and a pressure sensor and an ultrasonic wave height meter are arranged in each of the intermediate glass fiber tube, the upstream manhole and the downstream manhole; and a void ratio meter is arranged in the intermediate glass fiber tube. According to the novel gas-liquid mixed flow experimental device of the invention, different situations are fully considered, and experimental results have high accuracy and are closer to actual conditions.

Description

technical field [0001] The invention relates to the technical field of fluid mechanics devices, in particular to a novel gas-liquid mixed flow experimental device. Background technique [0002] Rainwater utilization has become an important issue in some water-deficient cities. The recycled rainwater can be used as an important source of living and production water, and the establishment of an underground rainwater storage system is an important rainwater recovery method; the rainwater storage system can store part of the rainstorm process. It can reduce the overflow of the drainage pipe network, and after the rainstorm, the collected rainwater can be pumped to the treatment station for treatment and reused. [0003] However, due to the large buried depth of the water storage main pipe, the gas in the system may not be discharged freely. At this time, the phenomenon of pressure oscillation and gas-liquid mixed flow shock will be inevitable. At present, the pipes in the drain...

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Problems solved by technology

[0003] However, due to the large buried depth of the water storage main pipe, the gas in the system may not be able to discharge freely, and at this time, the phenomenon of pressure oscillation and gas-liquid mixed flow impact will be inevitable

At present, the pipes in the drainage system are designed according to the unpressurized open channel flow, and the design flow is usually calculated based on a certain rainstorm return period; The change of pressure flow causes pressure oscillation in the system, so it is urgent to study the gas-liquid mixed flow and flow state transition in the drainage pipeline

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