关键词: 卧螺离心机, 压力场, 数值模拟

Abstract: Decanter centrifuges have been widely used for the separation of solid-liquid mixtures with high solid concentration. The real-time monitoring of the flow field inside the centrifuge is believed to be difficult because of its complexity in structure and closed operation at high speed of rotation. RNG k-ε turbulent model and MRF method based on the FLUENT software of computational fluid dynamic technology were used in this research to simulate the pressure field in the centrifuge. Results showed that the differences between simulated and theoretical hydraulic pressure caused by the lag of liquid rotation increased with increase in rotational speed. The static pressure and dynamical pressure increased with radius，and the gradient of static pressure was greater than that of dynamical pressure. The static pressure increased along the drum axis from the inlet to liquid discharge port，while the dynamical pressure decreased gradually. It could be used as guidance for researching the performance of decanter centrifuges.

Key words: decanter centrifuge, pressure field, numerical simulation