Structure Improvement of Swirl Sleeve Valves and Study of Flow Field Cavitation
Through taking DN 2000 large diameter sleeve valve as the research object,the straight flow sleeve within the valve was developed into a spiral flow one.Through using the Fluent simulation to analyze both pressure and streamline of the sleeve valve with different openings,the influence of two different sleeve structures on the flow field characteristics of the regulating valve was investigated and the cavitation phenomenon in the valve was compared.The results show that,as for the given pressure difference of 0.8 MPa,the medium passing through the straight groove sleeve valve generates cavitation in the outlet section of the pipe wall and the medium passing through the spiral sleeve valve runs in a spiral shape and generates cavitation in the center of the pipeline and both gas phase and cavitation strength generated in the rotary sleeve valve are smaller than that in the straight groove sleeve valve.The spiral sleeve valve has a certain anti-cavitation ability than the straight groove sleeve valve,which can prevent the cavitation damage to valve parts and pipe wall.
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