基于K-epsilon模型的某大跨度渡槽桥梁风流数值模拟

摘要:

采用流体力学计算软件ANSYS Fluent，建立某大跨度渡槽桥梁的三维湍流模型。为提高大跨度渡槽桥梁风流模拟的精确度，将Standard k-ε模型作为标准分析模型，验证另外两种修正后的两方程湍流模型（RNG k-ε模型、Realizable k-ε模型）的风流模拟效果。其中RNG k-ε模型和Realizable k-ε模型风流数值模拟均有良好的适用性，且对应不同分析工况选取不同的分析模型能够提高模拟的精确度。

Abstract:

The three-dimensional turbulence model of long-span aqueduct bridge is established by using the hydrodynamics calculation software ANSYS Fluent. In order to improve the accuracy of wind flow simulation of long-span aqueduct bridge, Standard K- ε model is used as the standard analytical model to verify the other two modified two equation turbulence models (RNG K- ε Model, Realizable K- ε Model). Where RNG K- ε Model and Realizable K- ε The numerical simulation of model air flow has good applicability, and selecting different analysis models corresponding to different analysis conditions can improve the accuracy of simulation.