Method for Measuring Air Bubble Filtration Characteristics of Separation Mesh

Abstract

The invention discloses a method for measuring air bubble filtration characteristics of a separation wire mesh. The present invention conducts the test in a circulating water tank. The circulating water tank system provides a uniform horizontal flow for the test section of the water tank to drive the movement of the bubbles in the horizontal direction through the rectification of the contraction section, and the rotating water tank flow regulating valve controls the liquid in the water tank. Flow speed, so that the bubbles rise under the action of buoyancy and have a controllable horizontal movement speed to impact the separation screen. The plane of the separation screen is perpendicular to the main flow direction and can move; The bubble generation system upstream of the net is generated; high-speed cameras and uniform light sources are installed on both sides of the water tank test section, and the boundary and movement trajectory of the bubbles are captured at high speed by using the shadow method, and then the bubble scale, impact velocity, rising velocity, and separation wire are obtained. Volume fraction of air bubbles before and after the mesh. The measurement mode of the method of the invention is simple and effective, and can be adapted to the measurement of different separated wire mesh objects.

Description

technical field [0001] The invention relates to a method for measuring air bubble filtration characteristics by separating wire mesh. Background technique [0002] Gas-liquid separation technology is widely used in petroleum, hydraulic engineering, fluid machinery and other fields. By setting up a gas-liquid separation device, it can effectively reduce the adverse effects of gas in the liquid on the facility and improve the working efficiency of the machine. Especially in fluid machinery, the gas-liquid separation technology can significantly improve the self-priming capacity of pre-filled self-priming pump products such as self-priming centrifugal pumps and vortex pumps, and shorten the self-priming time. Since the liquid in the volute of the pump body is continuously crushed by the cascade, the air-water mixture generated by the stirring and mixing of the liquid and the air under the high-speed rotation of the impeller cannot completely discharge the air from the outlet pi...

AI Technical Summary

Problems solved by technology

However, in practical applications, the rising speed of the bubbles during the movement is not only in the vertical direction, but the force exerted by the bubbles or the liquid flow on the bubbles increases the complexity of the study of the bubble motion characteristics.

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