Abstract: A novel type of vertical vacuum degasifier,mainly comprising the feeding unit,vacuum degassing chamber,relay storage tank,self-sealing discharge and control units,was developed for industrial production of wind turbine blades with epoxy resin.The flow fields in the gas/liquid separation zone of vacuum chamber were mathematically modeled,theoretically analyzed and numerically simulated with ANSYS Fluent for design optimization.The influence of the inlet geometry on the degasification of epoxy resin was investigated.The simulated results show that the inlet dip-angle has a major impact.To be specific,an increase of the inlet dip-angle significantly enhances the cavitation and improves the initial crushing of epoxy resin.The prototyped vacuum degasifier,constructed based on the design optimization,has been successfully operating in production line with satisfactory results.