船舶CFD不确定度分析及ITTC临时规程的初步应用

Uncertainty analysis in ship CFD and the primary application of ITTC procedures

该文在学习和消化国际船模水池会议(ITTC)的CFD(计算流体力学)不确定度分析临时规程的基础上,对潜艇标模SUBOFF光体的黏性绕流场进行了数值计算,应用ITTC临时规程对数值结果的不确定度进行了分析实践。通过实践,作者体会到:ITTC方法提供了一种比较直接、可靠的途径,不需更改求解器,相对容易实施;但是,目前ITTC的临时规程还只适合于简单对象,对复杂对象,实施上有较大的难度;为了更好地进行CFD不确定度分析,较多的实践经验是必不可少的。

The ITTC （ International Towing Tank Conference） temporary procedure for the CFD （ computational fluid dynamics） uncertainty analysis is reviewed in this paper. Aiming at the numerical results of the viscous flow around a benchmark submarine model （SUBOFF body）, the CFD uncertainties are analyzed by using the ITTC procedure. With the primary practice of the procedure, we may realize that： the ITTC procedure is quite direct and reliable, need not any modification to the solver and is easy to practise. But the current procedure is only appropriate for the objects with simpler configuration but is very difficult to be used for the complicated configurations. More experiences are needed for better performing CFD uncertainty analysis.