关键词: 管柱式, 离心分离, 数值模拟, 气液两相流

Abstract: In mechanical vapor recompression system,gas-liquid separation is needed before the steam produced in evaporator sucked into the compressor. In consideration of compactness and segregational stability,gas-liquid cylindrical cyclone(GLCC)is applied for this operation. Structure parameter design and Fluent numerical calculation show that,separation effect is significantly influenced by the size of overflow pipe and underflow pipe. Gas volume fraction and liquid volume fraction could be 1 with overflow pipe diameter of 50mm and underflow pipe diameter of 40mm. Proved the moving laws of the outer vortex and inner vortex existed in GLCC,which rotate in the same direction and move in the opposite direction. Compared to one single inlet,separation process could be more steady by the application of double inlets,appropriately increasing cyclone diameter could decrease the pressure drop and shorten the distance between pure gas phase zone and pure liquid phase zone,improve the separation performance.

Key words: column, centrifugation, numerical simulation, gas-liquid flow