Analysis on Flow Characteristics of Large-Diameter Sleeve Piston Valve Based on Simulated Altitude Test Facility
To accurately describe the variation law of velocity,pressure and flow resistance coefficient of the large-diameter sleeve piston valve,the influences of opening degree and pressure ratio on the flow characteristics of the sleeve piston valve were researched through Fluent software.The results show that velocity and pressure are symmetrically distributed along the axis of valve core;when the opening degree increases,the velocity of the axial jet pool area increases,the outlet velocity increases,and the velocity uniformity de-creases,the airflow pressure decreases at the throttle window,axial pressure tends to be uniform;the flow resistance coefficient first in-creases and then remains constant with the increasing of opening degree;when the pressure ratio increases,the inlet velocity first re-mains constant and then gradually decreases,and it has a critical pressure ratio,the velocity and pressure gradually tends to be uniform;the decrease of flow coefficient becomes more significant with the increasing of pressure ratio.
large-diameter sleeve piston valveflow characteristicsopening degreepressure ratio
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