Numerical analysis of free water sheet flow on Pelton buckets

摘要

A new algorithm of the animated cartoon method is introduced to numerically analyze the non-stationary free water sheet flow with moving boundary in the rotating Pelton buckets. The animated cartoon method offers how to discretize the real unsteady free sheet flow by a sequence of gradualy time shifting frames. In every frames, the distribution of the free water sheet flow with moving boundary in the bucket is computed Lagrangianly by integrating the various accelerations acting on the flow particles. Furthermore, the amount of spilt water at the cutout of bucket can be predicted as the important information for clarifying the scale effect of jet interference.