中文摘要：

为建立喷水推进船的自航试验模型,采用虚拟盘模型和重叠网格模型对装船后喷水推进器内的旋转叶轮进行数值计算,探讨了2种数值计算模型所得喷水推进船模船体的外流场及推进器流道内的轴向速度分布,并分析了喷水推进船模的流场特性.结果表明：2种模型的船体外流场计算结果基本一致,但两者的推进器内流场计算结果存在明显差别,且重叠网格模型的计算结果更接近真实叶轮状态;2种模型都能够模拟喷水推进船模内、外的流场特性,且对局部压力分布和船尾射流造成的兴波干扰效果的模拟结果均具有一致性.

英文摘要：

The virtual disk （VD） and overset （OS） models had been applied to the numerical simulation of impeller in waterjet which was installed on ship model in order to build numerical model for self-propulsion test. Research and discussions were mainly concentrated on the axial velocity distribution of hull flow field and internal flow field, and the flow field characteristics of waterjet propelled ship were analyzed. The re- sults revealed that the hull flow field coincided with each other for two models, but there was obvious difference in the internal flow field. Compared with the VD model, the OS model is more applicable to the actual state of the impeller. Both calculating models simulated the flow field characteristics of waterjet pro- pelled ship well. There was significant consistency both in the regularities of local pressure distribution and wave jamming effect caused by jet steam.