摘要
采用RNG k-ε紊流数学模型,研究了在中闸室具有突扩突跌型出口的情况下,下游泄洪洞渥奇曲线段的水力特性。在不同水流佛氏数的情况下,重点研究了中闸室长度对渥奇曲线段水力特性的影响,最终获取得到水流流态、水翅强度及空腔形态等的变化规律。在出闸水流弗氏数一定时,中闸室长度对突扩突跌型掺气坎后的掺气水流具有较大影响,具体表现为:当闸室长度较短时,底部与侧向掺气空腔均较短且空腔积水严重,水体底部掺气不明显;当闸室长度相对较长时,侧墙水翅强度较大,水流流态容易恶化。
RNGk-ε turbulence model is employed to study the hydraulic characteristics in the spillway tunnel downstream ogee segment when the middle gate chamber is with the sudden lateral expansion and vertical drop export. The research is mainly focused on the effect of the middle gate chamber length on the hydraulic characteristics with different Froude numbers in the ogee segment, and the flow regime is obtained, the strength of water-wing and the cavity shape of change rule finally. The length of chamber in spillway tunnel are the main factors influencing the aerated flow when the Froude number is certain. Resuhs show that ： when the length of chamber is relatively short, the cavity length on lateral and bottom are short, the cavity effusion is serious, and the mixed gas at the bottom is not obvious, when the length of chamber is relatively long, the intensity of water wing is larger, the flow regime is easy to deteriorate.
作者
王会杰
马继禹
马旭东
张永清
杨克君
WANG Hui -jie MA Ji -yu MA Xu -dong ZHANG Yong-qing YANG Ke -jun(State Key Laboratory of Hydraulics and Mountain River Engineering, Siehuan University, Chengdu 610065, China College of Water Resources and Hydropower, Siehuan University, Chengdu 610065, China Bohai Oil Harbor Engineering and Construction Co., Ltd., Tianjin 300452, China PowerChina Chengdu Engineering Corporation Limited, Chengdu 610072, China)
出处
《中国农村水利水电》
北大核心
2017年第2期182-185,共4页
China Rural Water and Hydropower
关键词
泄洪洞
闸室长度
掺气水流
数值模拟
spillway tunnel
length of chamber
aerated flow
numerical simulation
