采用RNG k2E紊流模型结合动网格技术对某工程Y 型宽尾墩泄洪表孔弧形闸门开启过程进行了三维动态数 值模拟研究。分析了闸门开启总时间、堰顶水头及下游初始尾水深对反弧及消力池压强的影响; 定义了闸后水流的 三种流态; 分析了反弧及消力池三个区域压强特性。研究表明, 闸门开启总时间越小, 闸后水流滞后越明显, 冲击区 滞后最大压强越大; 闸门开启过程中, 冲击区最大压强与堰顶水头近似成线性关系; 且其与调节区平均压强差随着 下游尾水深度的增加而迅速减小。部分结果与试验数据吻合良好, 说明数值方法是可靠的, 可为水工闸门的合理运 行提供借鉴。

The RNG k2E turbulent model and dynamic mesh technolog y w ere applied to simulate the unsteady flow in the st illing basin of Y2shaped flar ing g ate pier dur ing the pro cess of r adial g ate opening . The effects of tot al g ate opening time, w ater head over weir, and initial downstream wat er depth o n the pressur es of anti2ar c and stilling basin w ere analy zed. Thr ee different flow patter ns w ere defined accor ding to differ ent g ate o pening velocit ies. The pressure char acter istics of anti2arc and st illing basin wer e o btained. The results show ed that ( 1) if the to tal g ate o pening time is sho rter, flow lagg ing behind the gate is more obvious and the lag ged maximum pressure is hig her in the impact zone; ( 2) ther e is a linear relationship betw een the max imum pressur e and water head in the impact zo ne dur ing the g ate o pening pro cess; and ( 3) the differ ence betw een the max imum pr essure in the impact zone and aver age pressur e in t he adjusting zone decreases w ith the incr easing o f dow nstr eam w ater depth. T he simulatio n results ag reed w ell w ith the ex per imental data, which sugg ested that t he numer ical simulatio n method is r eliable and can prov ide import ant r eference fo r the reasonable o perat ion of hy dr aulic gate.

衡阳市重点科学技术研究项目( 20142209523)