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1·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。

2·Investment cast and ceram cast are best technology for the fabrication blade and bucket of small turbine.

采用熔模、陶瓷型铸造工艺来制造小型水轮机叶片和水斗是一种最佳的选择。

3·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。