两种运动方式的直翼推进器水动力性能比较

Comparison of Hydrodynamic Performance of Cycloidal Propeller with Two Motion Modes

关键词:  直翼推进器  非定常摆动  定常回转  水动力性能  脉动分析

Key words:  Cycloidal propeller  Unsteady oscillation  Steady rotation  Hydrodynamic performance  Pulsation analysis

摘要:

针对直翼推进器在不同运动方式下水动力性能的变化，进行直翼推进器的非定常摆动运动方式（VSP）与定常回转运动方式（KBP）的理论研究，分别实现了推进器叶片随公转运动的同时进行匀速自转或变速自转的多叶片耦合运动。结合VSP实际应用的翼型与KBP特殊运动特性决定的翼型进行对比分析，在充分发挥VSP水动力性能的基础上，运用CFD方法对采用两种自转运动方式以及不同翼型的直翼推进器敞水状态下的水动力特性进行比较，并对不同运动方式过程中推进器整体与单叶片的水动力脉动特征进行对比分析，总结了非定常摆动与定常回转运动形式中的水动力性能差异。

Abstract:

In view of the changes in the hydrodynamic performance of the cycloidal propeller under different motion modes， the theoretical study of the unsteady oscillating motion mode （VSP） and the steady rotational motion mode （KBP） of the cycloidal propeller was carried out， the multi-blade coupling motion of the propeller blades moving with the revolution at a constant speed or at a variable speed is realized respectively. Combining the airfoil actually applied by VSP and the airfoil determined by KBP’s special kinematic characteristics for comparative analysis， on the basis of giving full play to the hydrodynamic performance of VSP， the CFD method was used to compare the hydrodynamic characteristics of the cycloidal propeller with two rotation modes and different airfoil in the open water state， and the hydrodynamic pulsation characteristics of the propeller as a whole and the single blade during different motion modes are compared and analyzed， and the difference in hydrodynamic performance between the unsteady swing and the steady slewing motion are summarized.