A Simplified CFD Method to Partial Admission Fluid Force Estimation in Turbine

Almost all the steam turbin units run in off-design work conditions.Partial admission is adopted to avoid unreasonable losses but often reduce stability of high pressure turbine rotor.Many local faults and related research show that the unbalanced fluid forces due to partial admission has great impact on rotor stability.A novel CFD analysis method was presented based on some exists studies.The presented method can save great calculation resources with much higher accuracy than existed simiplification.The work offers a convenient tool for fluid force analyses on partial admission rotor system.