This paper employs two standard CFD calculation models(KCS and KVLCC)and a DTMB 5415 hull to analyze the influences of mesh types and mesh numbers on the ship flow calculation. The re⁃sults show that the hex-mesh model is more applicable for a CFD user to calculate the ship flow under re⁃strictive conditions. Also,to improve the accuracy of numerical prediction,a new approach is proposed that defines the ship heaving before the calculation,and some verification of the method is performed. Fi⁃nally,comparative analysis involving two ships’flow is conducted through the ANSYS CFX,which further validates the proposed model.% 以 KCS 和 KVLCC 为对象标定 CFD 计算模型，然后以 DTMB 5415为对象开展网格类型及规模对计算的影响分析，提出在计算条件受限的情况下，宜采用六面体网格开展船舶绕流数值预报。为提高数值预报的计算精度，提出预先给定升沉的船舶绕流数值预报的建议，并对该技术进行了验证性计算。最后，采用两条船开展了对比计算，进一步说明了所采用方法的可行性。
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