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1·Cavitation theory does not belong to Pelton turbine.

空化理论不属于水斗式水轮机。

2·This characteristic of Pelton turbine is apt to take the risk to predict the hydraulic performance of prototype from model.

冲击式水轮机试验表明：真机效率均低于模型效率，这种反常的趋势容易引起从模型试验结果预测真机性能的风险性。

3·The unsteady free water sheet flow in the rotating bucket 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。

4·In the beginning of this paper, the current status and achievements in the research field of Pelton turbine are introduced respectively by means of pipe flow, free jet and bucket flow.

本文在首先介绍了冲击式水轮机内部流动中管内流、自由射流以及水斗绕流等方面的研究现状和进展。