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为了求解水泵水轮机转轮内部的双向流动,提出了基于全三维转轮叶片设计模型的叶型渐近方法。该方法从水轮机方向设计目标叶型,并得到水轮机方向流场。再利用设计程序,从水泵流动方向设计叶型,用单纯形加速法控制速度矩分布变量,使得该叶型逐步逼近目标叶型,并得到水泵方向的流场,即得到同一叶型的双向流场。根据计算出的流场可以预估转轮的双向能量性能与气蚀性能。对一高水头水泵水轮机进行了设计计算,结果表明,该方法是可行的。
In order to solve the bi-directional flow in the pump turbine runner, a leaf-type asymptotic method based on the design model of the full three-dimensional rotor blade was proposed. The method designs the target airfoil from the direction of the turbine and obtains the flow field in the direction of the turbine. Then the design program is used to design the blade type from the flow direction of the pump and control the distribution of the velocity moment by the simplex acceleration method so that the blade type gradually approaches the target type and obtains the flow field in the pump direction, field. Based on the calculated flow field, the bi-directional energy performance and cavitation performance of the runner can be estimated. The design and calculation of a high head pump turbine shows that this method is feasible.