Research on Resistance Characteristics and Detailed Flow Field of Eccentric Orifice Plate

抄録

Three dimensional numerical simulations and comparative analysis are conducted to study the resistance and detailed flow field of the eccentric orifice plate. The results show that: (1) For single-stage eccentric orifice plate, the increase of eccentricity has less influence on resistance coefficient, but as eccentricity increases, the disturbance intensifies when the fluid flows through orifice plate, and the parameters such as pressure, velocity, and turbulent kinetic energy varies more drastically. (2) The resistance coefficient of multi-stage eccentric orifice plate is greater than that of the multi-stage concentric orifice plate with the same interspace. And the resistance coefficient of multi-stage orifice plate increase gradually with the increase of eccentricity. (3) With greater eccentricity, the resistance coefficient of multi-stage orifice plate decreases slightly until stabilizes while interspace increases. With less eccentricity, the resistance coefficient of multi-stage orifice increases gradually until stabilizes.