本文以喷水推进船为研究对象，采用数值计算方法计算不同缩尺比喷水推进系统的水动力性能。通过比较不同缩尺比喷水推进进出口的速度场和出口不均匀度，认为在缩尺比较大时，缩尺比对喷水推进进出口速度场影响较小。将模型尺度推力换算成实型推力时，引入无因次系数C，该系数会随着缩尺比的增加而不断增加。通过计算不同缩尺比喷水推进泵的C值，可以拟合出一条曲线，通过拟合出的曲线可以求出实泵的C值，最终可以将模型喷泵产生的推力通过相似换算得到实泵产生的推力。这对喷水推进装置的设计和喷水推进船的快速性预报具有重要的指导意义。
A water jet propulsion ship is studied in this paper, adopting numerical calculation method to solve its hydrodynamic performance of different similar ratio. It is found that similar ratio has little effect on the inlet and outlet velocity field of water jet propulsion ship, by comparing the velocity field of different similar ratio water jet propulsion ship. A dimensionless coefficient C is applied, when model pump thrust is converted into the actual pump thrust. And C increases with the increase of similar ratio. A curve can be fitted according to different C, then C of actual pump can be gotten. Finnally, the model pump thrust is converted into actual pump, which has important guiding signifiance for pump design and water jet propulsion ship velocity forcasting.
2021,43(6): 53-56 收稿日期：2020-09-07
DOI：10.3404/j.issn.1672-7649.2021.06.010
分类号：TH137
作者简介：汲国瑞(1990-)，硕士，工程师，研究方向为喷水推进
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