吊舱式CRP推进系统理论设计研究

采用螺旋桨旋涡理论和低阶速度势面元法对吊舱式CRP进行适伴流设计。在吊舱给定的前提下对前后桨进行升力线设计和升力面修正,吊舱与前后桨之间的相互影响通过诱导速度来考虑,且诱导速度作为伴流的一部分,并采用面元法进行非定常水动力性能预报。通过实例设计分析可知:在设计进速条件下,采用该方法设计的吊舱式CRP系统与设计的单桨相比,其效率可提高8.533%,设计吊舱式CRP尾流周向诱导速度明显小于单桨时的速度。

Theoretical Design Investigation about CRP Podded Propulsor

The propeller vortex theory and low order surface panel method are adopted to design the CRP podded propulsor in wake. The forward and rear propellers are designed using lifting line and lifting surface theories respectively. The interaction among the front propeller, the rear propeller and the pod unit is considered through induced velocities which is considered as part of wake field, and the surface panel method is used to have unsteady hydrodynamic performance predictions. The analysis of an instance shows: the propulsive efficiency of the designed CRP podded propulsor increases by 8.533% comparing with the designed single propeller, and the tangential induced velocities produced by the designed CRP podded propulsor are obviously smaller than those by the single propeller.