采用VOF方法和RNGk-ε模型对X型宽尾墩三维紊流流场进行了数值模拟，利用隐式解法提高了计算速度，捕捉到了水气两相流场并完成了对流场紊流特征的正确模拟。模拟结果表明：该模拟与实测结果吻合良好，说明采用的数值模拟技术对于自由水面的模拟能力可以满足工程实践的需要。

Numerical simulation of threedimensional turbulent flow field of X-Shape flaring gate pier is conducted by adopting VOF method and RNGk-ε model in this paper. By employing implicit calculation method, the calculation speed is improved and the waterair two-phase flow field is captured, thus the turbulence characteristics of the flow field are successfully simulated. According to simulation result, the simulation data fits well with the actual measurement, which indicates that the numerical simulation adopted in this paper represents a satisfactory capability of simulating free water surface, and can meet the requirements of engineering practice.