关键词: 调压室, 长连接管, 三维流场数值模拟, 流量系数

Abstract: A throttled surge tank is arranged downstream of a pumped storage power station, and the tailrace tunnel is connected with the connecting pipe through a bifurcated pipe and a bend. The layout pattern is special and the flow condition is complex. Considering the complexity of layout and the actual situation of engineering construction, this paper studies the flow regime and flow coefficient at the bottom of throttled surge tank with typical layout. The variation laws of flow velocity distribution, pressure distribution and coefficients of inflow and outflow at the bottom of throttled surge tank in different layout schemes are obtained.

Key words: surge tank, long connecting pipe, three-dimensional flow field numerical simulation, flow coefficient