摘要
结合溪洛渡工程下游河道消能防冲物理模型试验,将物理模型试验与数值模型相结合,建立复合模型,并应用该模型对多股水舌进入复杂天然河道后的流场结构进行模拟,计算结果表明多股水舌进入下游复杂河道的流场结构受河道复杂几何形状影响较大,河道复杂的几何形状对水舌两侧或上下游侧回流区和两岸侧螺旋流的对称性影响较大,螺旋流输运长度较常规水垫塘情况的短;根据计算得到的流场,对下游河道冲刷特性进行了预测与分析。计算中三维的自由面模拟直接采用物理模型实测结果进行。复合模型模拟的结果和实验结果吻合良好,表明在实际的工程问题研究中,该方法能够有效地解决单纯依靠物理模型不易解决的复杂地形条件和复杂入流边界条件的三维复杂问题。
The numerical simulation method was integrated with physical model test forming a hybrid model to simulate the flow field in river downstream of the Xiluodu Project plunged by four jets discharged from the spillways. The velocity distribution of the upstream cross section and the free water surface in the river section to be studied were obtained from the model test. The k-ε turbulence model was adopted to numerically simulate the flow field and the SIMPLEC method was applied to calculate the pressure and flow velocity field. The results show that the calculated flow fields are in good agreement with the model test data. The proposed model is also used to predict the erosion of the riverbed.
出处
《水利学报》
EI
CSCD
北大核心
2006年第4期471-479,共9页
Journal of Hydraulic Engineering
基金
教育部跨世纪优秀人才培养计划基金资助
关键词
溪洛渡
复合模型
紊流模型
冲刷特性
多股水舌
hybrid model
physical model test
numerical simulation
k-ε turbulence model
multiplejets
flow field in river
erosion
