论文部分内容阅读
针对水电站变顶高尾水洞中恒定流条件下明满混合流的界面呈小范围的来回波动现象,采用无压隧洞充蓄度和气液两相流界面稳定理论分析该流态。结果表明,明满混合流界面处局部的水流不稳定段客观存在,但不可能形成全洞长明满流交替和滞气现象,且基于气液两相流界面稳定理论获得的计算值与试验值吻合,为变顶高尾水洞优化设计提供了理论和计算方法支撑。
Aiming at the phenomenon that the flow of the bright full mixed flow fluctuates in a small range under the condition of constant flow in a variable height tailrace tunnel of a hydropower station, the flow regime is analyzed by the theory of uncharged tunnel charge and the stability theory of gas-liquid two-phase flow. The results show that the instability of the local water flow at the interface of the Ming-Man mixing flow objectively exists, but it is impossible to form the full-flow alternation and gas-lag phenomenon in the full-borehole. Based on the calculated values and experimental results obtained from the stability theory of gas-liquid two- The results are in good agreement with each other, which provides theoretical and computational support for the optimal design of caving tail tunnel.