船舶喷水推进技术发展

  目的  喷水推进船舶的阻力性能与常规船舶有着很大的不同，喷水推进器流道的存在会改变船舶尾部流场，对船舶阻力性能有着很大的影响。  方法  以FA1型三体船为计算模型，利用CFD软件STAR-CCM+，将喷水推进器流道看作附体，对比研究安装不同进流角喷水推进器流道前后船舶尾部流场变化。通过对比流道表面压力分布、船体流线的变化，阐述船舶阻力以及阻力成分产生变化的机理。  结果  结果表明：STAR-CCM+可以实现对于船舶阻力性能的预报；喷水推进器进水流道的安装会增大船舶阻力，主要为压差阻力的增大。  结论  对进水流道倾角的优化可以增进喷水推进船舶的阻力性能。

The development on technology of water jet propulsion for ship

The waterjet duct can change the flow field of the stern, and it has a great influence on the resistance performance of the ship. The resistance performance of marine vehicles driven by waterjets is very different from that of conventional ships, so it is meaningful to study the changes to the resistance performance of the ship. We used the CFD software STAR-CCM +, treated the waterjet duct as the appendage and compared the change of the flow field in the stern after the installation of the waterjet duct at different angles. We described the change mechanism of the ship's resistance and resistance components by comparing the change in pressure distribution of the waterjet duct's surface and the flow field around the hull. The results show that STAR-CCM+ can realize the prediction of ship resistance performance because the simulation results achieved perfect accuracy, and it is gradually becoming the development direction of the resistance performance prediction of marine vehicles driven by waterjets. The installation of the waterjet duct will increase the resistance of the ship, which is mainly due to the increase of pressure resistance. In addition, the resistance performance of a ship driven by waterjets can be improved by the optimization of the waterjet duct's angle.