船舶伴流场对螺旋桨的效率、空泡、噪音及激振力起着十分重要的作用。目前对于螺旋桨实效伴流主要通过螺旋桨自航试验和敞水模型试验结果计算而来，也有通过经验公式估算求取。由于模型试验存在着尺度效应、结果换算误差大，以及需要大量的人力、财力、物力及时间，而经验估算方法存在适用范围窄、估算结果偏差较大的问题，因而，建立一套基于粘流理论结合势流理论的实效伴流准确预报方法将是非常必要、且有实际应用意义的。 本项目建立的基于粘流与势流理论耦合方法求取实效伴流场研究方法以及标称伴流场向实效伴流场转换方法将为螺旋桨的适伴流设计以及空泡、噪声等性能的模型试验提供一套比较合理且准确的实效伴流分布；同时，为船舶伴流场研究工作的进一步开展提供技术支撑。

Ship wake plays a very important role on the efficiency, cavitation, noise and exciting force of propeller. By now, effective wake was calculated by self-propulsion test and propeller open-water test, or by empirical formula. Because model test has scale effect, which contributes a great conversion error and cost a lot of manual labor, time, financial and material capabilities, and empirical estimation methods only can be applied in a narrow field and its results has a large deviations. So it is very important and significant to build a method based on viscous theory and potential flow theory to predict effective wake. The method based on viscous theory and potential flow theory and the measure how to convert nominal wake to effective wake were built in this project that can provide a reasonable and accurate distribution of effective wake to the design of wake-adapted propeller and the model test of cavitation and noise; on the same time, it can provide technical support for the further research of ship wake.