全方向推进器在复杂流场中的水动力性能研究

全方向推进器是一种新型的推进操纵装置，它可以通过在桨叶的旋转过程中周期性的改变叶片螺距角来产生任意方向的力。全方向推进器可以替代槽道推进器，从而使水下航行器更加轻量化、小型化，改善水下航行器的结构性能与内部布置。它将在海洋工程领域里得到广泛应用。 全方向推进器工作在复杂海洋环境中，易受到不规则海流及旋涡的影响。如何适应复杂的海洋流场，有效的控制叶片螺距角的变化规律来实现水下航行器的前进、后退、偏航、俯仰、悬停、 转弯、升降等动作，是全方向推进器必须面对的问题，也是带有前瞻性的课题。全方向推进器在复杂流场中的水动力性能研究是解决该问题的基础。 本项目拟采用粒子图像测速技术（PIV）与CFD技术相结合的方法来建立横向来流、斜向来流及轴向非均匀来流中的全方向推进器流场精确模拟与水动力性能预报方法，对复杂流场中全方向推 进器的水动力性能进行研究，为解决全方向推进器在复杂流场中的操控问题奠定

Variable Vector Propeller is a new-type thruster, which can be used to provide forces on any direction by control pitch angle periodically. By using this type of propeller, it certainly seems to be able to reduce propellers and consequently to contribute to the compactness and the light weight of ROV.It will be used widely in the field of marine engineering. Variable Vector Propeller works in the complex marine environment and it's vulnerable to the impact of irregular currents and vortices.It's an important problem to be solved when we make research on the variable vector propeller that how to control the blade pitch angle effectively to make the AUV forward, back, yaw, pitch, hover, turn, lift, etc. in the complex marine environment, which is also a forward-looking topic. To solve the problem,we should make research on the hydrodynamic performace of the variable vector propeller in complex flow field firstly. In this project,the method for the accurate simulation of the flow field and hydrodynamic performance prediction of variable vector propeller in tranverse flow,oblique flow and axial non-uniform flow will be studied by the way of combining particle image velocimetry (PIV) and CFD technology. The hydrodynamic performace of the variable vector propeller will be studied to lay a foundation for the manipulation in complex flow field.