非常规水轮机导水部件出口流动的研究

Study on Outlet Flow of Water-leading Part in Non-conventional Water Turbine

根据非常规水轮机的特点及设计要点,对导水部件及其出口至转轮前的流动模型进行研究,并通过数值计算和性能试验加以验证。研究结果表明:对于非常规径流式水轮机采用流道式导水部件能够明显降低相对水力损失,非对称的斜切管嘴形流道会使出流方向发生偏转,本文研究对象的偏转角可取为射流扩散角,建立的流动模型与实际流动基本一致。所得研究结果为非常规径流式水轮机设计提供了参考依据。

Design and characteristics of non-conventional water turbine was Summarized, and the research focusing on building the flow model inside its water-leading part and from the outlet of the water-leading part to the impeller has been done. The results indicated that the radial water- leading part could greatly reduce the hydraulic losses in non-conventional water turbine~ the outlet flow of water-leading part was deflected by using the asymmetrical beveling nose flow channel, and the deflection angle was defined by the diffusion angle of jet flow, which proved to agree well with the real flow. The results were also validated by the numerical simulation and performance experiments. It is beneficial for other researchers in designing non-conventional water turbines.