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灯泡贯流式水轮机有可调节开度的活动导叶和转轮叶片,活动导叶安装角α_G与转轮叶片安装角(?)_R的组合有无限多种。本文目的在于:通过CFD(计算流体力学)能够于设计阶段预测α_G和(?)_R的最佳组合(即协联工况角),以最大程度提高设计的水力性能及特性。论文使用速度矢量、欧拉能量因子、压能因子和总能因子等讨论活动导叶、转轮、尾水管的内部流动状况,阐明协联工况下转轮开度(?)_(Rcam)对最佳的活动导叶开度α_(Gcam)的影响,提出基于转轮叶片入口相对流动角预测协联工况下活动导叶最优开度的机理及方法。推导提出的预测式可用于CFD解析结果也可用于设计初期时使用,研究成果可为转轮优化设计提供可靠的技术支持。
Bulb turbine with adjustable opening of the guide vane and rotor blades, movable vane mounting angle α_G and rotor blade mounting angle (?) _ R combination of unlimited variety. The purpose of this paper is to predict the best combination of α_G and (?) _R (ie, the joint operating angle) at design stage with CFD (Computational Fluid Dynamics) to maximize the hydraulic properties and characteristics of the design. In this paper, the internal flow conditions of guide vanes, runner and draft tube are discussed by using velocity vector, Euler energy factor, pressure energy factor and total energy factor, and the relationship between the runner opening (Rcam) The optimum guide vane opening α_ (Gcam) is proposed to predict the optimum opening of the guide vane under the condition of the co-operating condition based on the relative flow angle of the inlet of the rotor vane. Derivation of the proposed prediction can be used for CFD analysis results can also be used for the initial design, the research results for the optimal design of the rotor to provide reliable technical support.