模型试验中的阵发性不稳定流态及折冲流：李家峡水电站左底孔试验中的两个…

Model Test on Instable Flow and Oblique Flow

本文证实李家峡水电站左底孔不存在阵发性不稳定流态问题,模型上的这种不良流态是模拟条件引起的。文章分析了与折冲流有关的因素,如压差、压力和流速梯度以及渥奇面参数,进而提出了修改方案,基本解决了该孔存在的折冲流问题。

This paper proves that there is no instable flow in the bottom outlet works in Lijiaxia Hydroelectric station and the instable flow in the several models is caused by the modeling condition. The factors related to the oblique flow, such as pressure difference, pressure and velocity gradients and the parameter of Ogee surface are also analysed.