桥墩附近水流结构的三维数值模拟

Three-dimensional simulation of flow structures near bridge pier

运用标准k-ε模型和RNGk-ε模型、可实现k-ε模型对桥墩附近的水流情况进行了数值模拟。从自由水面的变化、平均流速等方面对模拟的结果进行了总结分析,并将3种模型的模拟结果与实测资料进行比较,结果表明RNG k-ε模型及可实现k-ε模型较好地模拟了桥墩附近的水流结构。

Features of flows near bridge pier are simulated by means of standard κ-ε model, RNG κ-ε model and realizable k-e model. The simulation result is analysed in terms of variation of water surface, average velocity and shape of tail vortex. A comparison of the simulation results of the three models with actual measurement results indicates that the RNG κ-ε model and realizable κ-ε model can well simulate the structure of flows near bridge pier.