达克曲克水电站溢洪道空化空蚀问题研究

国内首个成功运用通气减蚀措施避免泄水建筑物空蚀的工程是冯家山水库.与冯家山大坝一样,达克曲克水电站属中坝工程,最大坝高62.6m,有必要讨论表孔溢洪道泄槽空化空蚀问题.采用时启燧等提出的掺气挑坎临界坎高的经典算法以及空化空蚀相关规范,通过理论计算与实际分析表明:①在溢洪道泄槽段无需设置掺气挑坎；②在没有掺气减蚀措施的情况下,计算施工不平整度按要求控制可以有效避免空化空蚀.

Research on cavitation problem for spillway in ducky cheuck hydropower station

Fengjiashan Reservoir is the first engineering by successfully using measures of cavitation control by aeration to avoid the cavitation damage of water release structuree in China.The same as Fengjiashan dam,Ducky Cheuck hydropower station is the medium-sized engineering whose maximum dam height is 62.6 meters,so it is necessary to discuss the problem of cavitation and cavitation damage of the spillway chute.Used the classic algorithm put forward by Shi Qisui to calculate the critical ridge height of aerated bucket and the specification of cavitation damag,through theoretical calculation and the practical analysis,it shows that ① it is unnecessary to set up aerated bucket on the chute of spillway;②by controlling the construction irregularity according to the specification can effectively avoid cavitation and cavitation damag although in the case of no measures of cavitation control by aeration.