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本文在原型观测和模型试验的基础上,就白山重力拱坝溢流高孔掺气减蚀设施的通气孔尺寸,水流挟气能力和水舌下空腔压降的缩尺影响进行了讨论,同时给出了一种由系列模型推算原型需气量的方法。此外,本文还介绍了白山重力拱坝高孔首次过流的观测资料,并与模型试验进行了比较,初步说明了上述研究成果基本上为工程设计提供了较为可靠的依据,本文的研宄方法及研究成果为进一步研究大跌坎式掺气减蚀设施的设计方法和减蚀效果积累了一定的经验,对类似工程的设计、研究有一定的参考价值。
On the basis of prototype observation and model test, this paper discusses the scale effect of aeration pore size, water entrapment ability and pressure drop of water under the tongue of Baishan gravity arch dam with overflow holes. At the same time, a method of estimating the prototype air demand from a series of models is given. In addition, this paper also introduced the observational data of Baishan gravity arch dam high-aperture overcurrent for the first time, and compared with the model test. It proves that the above research results basically provide a reliable basis for engineering design. In this paper, And research results have accumulated some experience for further research on design methods and erosion mitigation effects of plunge erosion and cavitation erosion reduction facilities and have certain reference value for the design and research of similar projects.