By adopting appropriate foundry techniques, the accuracy of dimension and shape were ensured. The surface quality and internal density of runner meet the requirements of design.
通过采用合理的铸造工艺，确保了其叶片型线尺寸精度、转轮表面质量及铸件内部的致密度满足了设计要求。
2
In this paper, the finite element method is used for the calculation of S1 streamline surface of Francis turbine runner with half vanes.
本文采用有限元法对带半叶片的混流式转轮的S1流面进行了流场计算。
3
The surface quality and molding efficiency of plastic parts are improved by hot-runner system and gas-assistance injection molding.