漕渡门桥航行水阻力和绕流场的数值预报

为了进行漕渡门桥水动力性能的研究，利用CFD（computational fluid dynamics）商用软件作为计算工具，用有限体积法离散控制方程，分别对带式和分置式漕渡门桥模型，在不同速度下航行时的水阻力和绕流场进行了数值求解。用重正化群k-ε湍流模型计算门桥壁面边界层流动，流体体积函数方法进行自由表面波形的数值追踪。计算结果与船舶拖曳水池阻力试验数据相比，具有良好的精度。该数值计算方法可作为研究门桥水动力性能方法的重要补充。

Numerical prediction of water -drags and flow fields for ferrying raft

By using CFD commercial sof tw are to inv estig ate the hydrody namic perfo rmance of the ferrying raf t s, the gov erning equatio ns w ere discreti zed in fini te vo lume metho d and a series o f numerical simulatio ns w ere ca rried out fo r f low fields and wa ter-drag s fo r tw o fer rying raf t models. The turbulence and f ree-surface motio n w ere simula ted by solving RN G ( renormali za tio n g roup) k-Xturbulence model a nd f luid v olume f raction equa tion respectively. And in the numerical simula tions tw o styles of raf t model w ere handled, i. e. , the ribbo n ra ft and multi-hull raf t. Compariso n of th e simulated result s wi th the ex perimental da ta show s that the simulated result s are credible. Th e numerical method ca n be the impo rtant complement to the study on ferrying raf t hydrodynamics