中文摘要：

针对有压洞内洞塞式消能工附近局部流动，分析研究了水流紊动特点，应用三维RNG k-e紊流模型，利用物理模型试验资料对其计算结果进行了验证，利用模型对洞塞式消能工引起的水头损失进行计算分析，分析结果表明，当洞塞段相对长度从很小开始增加时，水头损失系数呈现先急剧降低而后明显增加，最后缓慢线性增加的趋势；在有压洞半径一定的情况下，洞塞段过流半径的变化比洞塞段过流长度的变化对水头损失系数影响更为明显，可为洞塞式消能工的设计提供相关参考依据。

英文摘要：

In the case of the plug energy dissipater flow, the characteristic of turbulence is studied firstly, then 3-D RNG k-E mathematical model and the calculation program are established and verified properly by the physical model test data. Based on the computational results of mathematical model, the head loss of plug energy dissipater flow is analyzed and generalized, showing that the head loss coefficient reducs rapidly, then increases evidently and finally increases according to linearity relation, when the ratio of plug section length to plug section radius increases from small value. According to the same radius of pressure tunnel, the head loss coefficient is affected by a variety of plug section radius more than that of plug section length, which can give reference to the design of plug energy dissipater.