一、根据效率决定可逆式机组叶轮的最优外径首先。从考虑叶轮损失着眼。原则上,可逆式机组总是按水泵叶轮要求设计的。由于叶片反向弯曲,故只有当叶轮作水泵运行而显示出可控相对流量及高效率μ_P 时,这种叶轮才可作水轮机运行,甚至在反向水流时也得到相当满意的效率μ_T。一般来说,μ_T 实际上大于μ_P。考 First, according to the efficiency of reversible impeller impeller optimal diameter First of all. Focus on impeller loss. In principle, reversing units are always designed as pump impellers. Since the blades are curved in the opposite direction, the impeller can operate as a turbine only when the impeller is operated as a pump and shows a controllable relative flow rate and a high efficiency μ_P, and even a very satisfactory efficiency μ_T is obtained even in the reverse flow. In general, μ_T is actually larger than μ_P. test