百色水利枢纽溢流坝掺气减蚀研究

百色水利枢纽工程RCC主坝高130m，最大水头差102m，溢流坝最大单宽流量约166m^3／S，流速超过40m／s，采用宽尾墩加消力池联合消能，由于水头高，流速大，堰面气蚀问题突出，水流掺气是减灭气蚀的有效方法，通过分析其它工程掺气减蚀的经验，就百色水利枢纽大比例尺模型试验来研究百色掺气水流的特性，掺气减蚀效果的评估以及掺气坎的最佳布置。

Research on aeration cavitation-alleviation for spillway dam of Baise Multipurpose Dam Project

Baise Multipurpose Dam Project has a main dam of 130m in height. The maximum water drop is 102m. The discharge per unit width of spillway is approximately 166m~3/s, corresponding to a flow velocity over 40m/s. Even joint energy dissipation by tail-flaring piers and stilling pool is applied, cavitation on weir surface is still an outstanding problem due to high water head and flow velocity. Aeration in water flow is effective in alleviating and eliminating cavitation. Combined with the experience of various projects in applying aeration to alleviate cavitation, and based on the results of large-scale model test for Baise Multipurpose Dam Project, the author made a research on the characteristics of aerated flow, assessment of aeration erosion-alleviation effect as well as the optimum arrangement of aeration sill.