水动推进力及其应用

Hydrodynamic propulsion and its application

考虑到三维效应和重力影响,提出研究设置导流槽的船底在水面滑行激起的流场以及作用在槽和船底浸湿面上的水动力。该导流槽的顶部曲面前低后高,对船底基面形成倾角。运用严谨的数学物理方法解决问题,求得描绘三维流场状况的解析函数,由此获得船艇前进时出现在槽顶部曲面上推船艇前进的水动推进力和向上的水动升力定量值的解析表述式。将船底浸湿面设计成设置导流槽的外形,建成实船试航,通过卫星跟踪的GPS系统实测获得的数据证明了水动推进力的存在,且它随着航速的提高而迅速增大,于是船速以及稳定性、安全性均得以大幅提高。实船设计时,可通过合理调整表述式中的物理参数,设计建造整体性能远优于常规船艇的实船。

Taking account of the 3-D effect and the gravity impact,this paper studies the flow field which has been activated when the ship bottom with blast groove slides on the water surface and the hydrodynamic of the wetted surface of the ship bottom. The top curved surface of the blast groove is higher in fore and is lower in aft, which forms an obliquity against the bottom baseplane. The rigorous methods in mathematical physics are applied to work out the analytic function describing the 3-D flow field in order to obtain the hydrodynamic propulsive force,which appears on the top curved surface of the groove when the ship moves forward,and the quantificational analytic expression for the hydrodynamic lift. The wetted surface of the ship bottom is designed to be able to set blast groove, and the ship trails are build to prove the existences of the hydrodynamic propulsive force through the data obtaining from the satellite tracking GPS system. It augments rapidly along with the increasing ship speed,so the ship speed,stability and security all are improved greatly. In terms of the ship design,the overall design and construct performance surpasses the regular ship by rationally adjusting the physical parameters in the expressions.