압력보정형 온도조절밸브의 유동특성 연구

Pressure compensating temperature control valve (TCV) is one of the important control devices which are used to constantly maintain the temperature of working fluid in power and chemical plants. the ratio of piston and hole diameters is one of the main design parameters of TCV. So ttis needs to be investigated to improve the function of control of temperature and void fraction. In this study. we investigate the flow and operating characteristics by numerical and experimental methods. The governing equations are derived from making using of three-dimensional Navier-Stokes with the standard R-e turbulence model and SIMPLE algorithm. Using a commercial code, PHOENICS, pressure and flow fields in TCV are calculated with different port areas for cold and hot water passage. To estimate the reliability of numerical results, the inlet and outlet pressures and the ratio of two exit flow rates are compared with experimental results. Also, we prepared some results of visualization of piston location as well as ratio of flow rates.