A globe valve is one of devices which control mass flow rate. In nuclear powerplants, it is usually used for high pressure drop over 100 bar. To attain the high pressure drop, trim in a valve should be designed elaborately to avoid the occurrence of l...
A globe valve is one of devices which control mass flow rate. In nuclear powerplants, it is usually used for high pressure drop over 100 bar. To attain the high pressure drop, trim in a valve should be designed elaborately to avoid the occurrence of local cavitation in a valve. Trim for high-pressure drop is classified into two types of pressure control and velocity control. This work is focused on design of trim with velocity-control type. Suitable geometry or shape of trim is pursued numerically, which should satisfy two conditions of high-pressure drop and suppression of local cavitation phenomenon. For operating conditions of actual powerplants, flow characteristics and cavitation area are examined numerically. Several trim geometries are proposed as candidates for trim with velocity-control type.