Numerical Simulations on Flow Field Structure and Free Surface Behavior of ADS Windowless Target

Free surface flow is one of the most important parts in the studies of windowless target in Acceleration Driven System（ADS）. CFD simulations were performed in order to investigate the hydraulic behaviors of the free surface flow in the optimal structure of windowless target designed by Shanghai Jiao Tong University. Volume of fluid（VOF） method and large eddy simulation（LES） were applied in transient calculations on FLUENT platform at Re=35,000~80,000. The simulation results achieve the variation characteristics of free surface stability, free surface width, vortex structure, vortex stagnation length and pressure along conical channel with the increase of Re.