Numerical Simulation of CFD for Steam Ejector and Effect of NXP on Its Performance

Based on the calculation method summed up by Sokolov with theory and experience, this paper designs the relevant structural parameters of the steam ejector and establishes a two-dimensional CFD(Computational Fluid Dynamics) model of the steam ejector. Then, the numerical simulation software FLUENT is used to study the influence of NXP (Nozzle Exit Position) on the performance of the injector and the optimum NXP is obtained. The results show that the remaining structural parameters are kept unchanged, and only Nozzle Exit Position is changed, that has an optimal value. At this time, the injection coefficient of the injector is optimal, and the injection coefficient can be improved accordingly.