CAJ | 학술논문

桥梁防护中由于桥墩周围的绕流冲刷极其复杂，迄今对该绕流流态及其与河床冲刷关系的认识仍不完善。为了深入分析圆柱桥墩周围的三维水流结构及冲刷现象，利用Flow-3d三维模拟软件对不同流速下的圆柱绕流流态进行数值模拟并和模型实验对比另对圆柱桥墩周围的冲刷做了初步的模拟分析。结果表明，Flow-3d可以清楚地反映桥墩周围的水流流态并通过了模型实验结果验证。说明Flow-3d可以准确模拟单圆柱绕流并获得流场的三维瞬时流速和冲刷现象，本研究可为河床中桥墩附近的冲刷计算和防护设计提供重要的参考。
교량방호중유우교돈주위적요류충쇄겁기복잡，흘금대해요류류태급기여하상충쇄관계적인식잉불완선。위료심입분석원주교돈주위적삼유수류결구급충쇄현상，이용Flow-3d삼유모의연건대불동류속하적원주요류류태진행수치모의병화모형실험대비령대원주교돈주위적충쇄주료초보적모의분석。결과표명，Flow-3d가이청초지반영교돈주위적수류류태병통과료모형실험결과험증。설명Flow-3d가이준학모의단원주요류병획득류장적삼유순시류속화충쇄현상，본연구가위하상중교돈부근적충쇄계산화방호설계제공중요적삼고。
Due to the complexity of local scour and flow around cylindrical piers in the field of bridge protection ,flow patterns around bridge piers and their relationship with bed scours are still unknown .In order to analyze three‐dimensional flow structure around piers and scour phenomenon further ,the water flow at three velocities around a single cylinder is simulated by using Flow‐3D soft‐ware ,and the simulation results are compared with the model experiments .The sediment scour around a single pier is also simulated . The simulation results are well verified by the model experiments .The results indicate that Flow‐3d can be used to simulate the flow around a cylinder and obtain the three‐dimensional instantaneous velocity accurately .This study can provide valuable ideas for the bed scour calculation and protection design .