The unsteady free water sheet flow in the rotatingbucket of a Pelton turbine is a very complex flow that cannot be accurately simulated for lack of a numerical method.
冲击式水轮机水斗内非定常自由水膜的流动非常复杂,至今还没有足够精确的数值方法来模拟这种流动。
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A towed sweeper for the street in city is disclosed. The sweeping brushes on the sweeping drum are reversely rotating to sweep the garbage into garbage bucket.