【作者】 李国栋； 叶龙斌； 张迪； 陈刚；

【Author】 LI Guo-dong~1,YE Long-bin~1,ZHANG Di~1,,CHEN Gang~1,2 1 College of Water Resources and Hydroelectric Engineering,Xi’an University of Technology,xi’an 710048,china 2 Ankang University,Ankang 725000,China

【机构】 西安理工大学水利水电学院； 安康学院；

【摘要】 采用大涡数值模拟方法对有压泄洪弧形闸门突扩突跌段的水流特性进行了数值模拟研究。计算得到了水流的空腔长度、压力分布等水力特性,时均参数与实验结果吻合良好。通过对侧墙压力分布及脉动强度的分析发现,在侧墙水流冲击点的下游,最小瞬时压强会低于汽化压强,表明即使时均意义上侧墙不会发生空化,也有发生间歇性的空化的可能。更多还原

【Abstract】 by using the large eddy simulation technology,a numerical simulation study was conducted on hydraulic characteristics of a sudden lateral enlargement and bottom drop section in gate chamber with arch sluice.The results show that:the cavity length of the flow,pressure distribution and hydraulic characteristics,the mean parameters are consistent with the experiment parameter value.Through analysis of the side wall pressure distribution and pulse strength found,in the downstream of the side walls water impact point,the minimum instantaneous pressure will be lower than the vapors pressure,indicate that even if in time average the side wall won’t result cavitation,it is possible to occur intermittent cavitation.更多还原