导流洞改作水电站尾水洞过渡过程明满流机理

阐述导流洞发作水电站尾水洞的特点及过渡过程中明满意流的转换过程：总结前人研究成果并超越常规计算假定约束，考虑这类明满流特有的初始状态和条件的影响，对洞内载留空气和进、排气过程作了分析和处理，建立了数学模型。

STUDY ON MECHANISM OF FREE SURFACE PRESSURIZED FLOWS IN TRANSFORMING DIVERSION TUNNEL INTO HYDROPOWER TAILRACE TUNNEL

This paper describes the distinguished features of transforming the diversion tunnel into the hydropower tailrace tunnel and the conversing process of the free surface pressurized flows. Basing upon the achievements and breakthroughs, their restrictive assumptions of the former, we considered the effects of the particular initial state and boundary conditions, analysed the trapped air bubbles, dealt with the process of air suction and exhaust in the diversion tunnel, then established a mathematic model. According to the result of computations and hydraulic model tests, the cause of both high positive and negative pressures produced by the free surface pressurized flows is explained, and the mechanism of the flows expounded. These studies lay theoretical foundations for this kind of engineering problems and scientific study.