Abstract
High pressure water abrasive jet nozzle is key part of the particles acceleration. The diameter of nozzle has important effect for jet fluid. Through experiment and simulation explore the relationship between nozzle diameter and jet fluid cutting capacity. The result indicate: ①the cut depth and broad reduced in linearly relationship with the diameter of the jet nozzle. ②In same pressure, decrease the nozzle diameter will reduce the cutting ratio energy; ③The acceleration and attenuation of the nozzle axial flow in different diameters are basically consistent, The smaller nozzle diameter, The flow acceleration will slower, the attenuation will faster, the is velocity core segment will shorter and the cutting ability will lower;Consider from energy consumption, cutting efficiency and other factors, for common material cutting the nozzle preferred diameter is: 0.6~1.0mm, it’s unfavourable to select the 0.2mm diameter
Highlights
High pressure water jet technology is a new technique in latest half century, which broad used in cutting, broken and washing
The cutting depth of the former is about 1/3 of the latter, when cutting the copper plate, it is only 1/6.When the nozzle diameter is less than 0.2mm, the cutting ability of the jet is very low
When the nozzle diameter is reduced to 0.2mm, the boundary layer of jet flow increases the influence of particles
Summary
High pressure water jet technology is a new technique in latest half century, which broad used in cutting, broken and washing. The technique separate with pure water jet and abrasive jet .The nozzle is generation part of AWJ, it’s important in abrasive particle acceleration. The nozzle’s diameter has deep effect on Jet power and jet machining quality. The article researches the relationship between nozzle diameter and cutting capacity
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