A real-time monitoring device for near-wall effect of multiphase flow

Abstract

The invention discloses a multi-phase flow near-wall effect real-time monitoring device. The device comprises an abrasive grain flow storage tank, an image particle observation system, a passageway observation device, a pressure meter, a flow meter, a ball valve, an abrasive grain stirring pump, an air pump, an air faucet and pipelines. The abrasive grain stirring pump is connected with the ball valve through the pipeline in a sealed mode, and the ball valve is adjusted to control the flow of an outlet of the abrasive grain stirring pump. The pressure meter and the flow meter are connected with an outlet of the ball valve and an inlet of the passageway observation device respectively through the pipelines in a sealed mode, and the air faucet is connected with an outlet of the air pump and connected with the passageway observation device through an air pipe. The passageway observation device is connected with an inlet of the abrasive grain flow storage tank through a guide pipe in a sealed mode, an outlet of the abrasive grain flow storage tank is connected with an inlet of the abrasive grain stirring pump in a sealed mode, and abrasive grain flow internal circulation is formed. A laser transmitter and a CCD high-speed camera in the image particle observation system are used for shooting motion characteristics and wall effects of multi-phase abrasive grain flow in a passageway near-wall region, and therefore experimental data of the multi-phase abrasive grain flow wall cutting mechanism is visually acquired.

Description

technical field [0001] The invention relates to the field of ultra-precision polishing processing, and more specifically, relates to a real-time monitoring device for multiphase flow near-wall effects. Background technique [0002] In the field of fluid polishing, although the traditional liquid-solid, gas-liquid two-phase flow can effectively polish complex curved surfaces, its polishing efficiency is low, and it is difficult to form an effective method for realizing large-scale and large-area polishing. In the process of multiphase flow research, it is found that under the action of some external excitation, abrasive particle flow will generate air bubbles (cavitation cells) inside, and the air bubbles will also move with the movement of the fluid. When the air bubbles touch the rigid Objects, such as abrasive grains and workpiece walls, collapse due to the destruction of the stable potential field conditions in which they exist. The energy generated by the bubble collaps...

AI Technical Summary

Problems solved by technology

At present, the research on the motion characteristics of gas-liquid-solid multiphase abrasive particle flow near the wall is mainly based on simulation, which lacks intuitive and authentic first-hand data.

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