空气动力艇回转式推进装置的动力学特性

依据动力学特性设计一种新型空气动力艇回转式推进装置,通过简化流场模型和分析对称翼形受力计算空气螺旋桨推力和舵板受力,对比传统推进装置和回转式推进装置在不同转向角和螺旋桨转速条件下的动力学特性差异,并引入增值系数K对转向性能进行分析。研究结果表明:小偏转角下传统推进装置的推进和转向性能较好,但大偏转角下回转式推进装置的推进和转向性能要优于传统推进装置,且转速越高转角越大,其性能优势越明显。

Dynamic Characteristics of Rotary Propulsion Device for Airboat

A new rotary propelling device of airboat is designed according to the dynamic characteristics. Both driving force and steering force are calculated by simplifying the flow field model and introducing the method of force analysis on symmetrical wing. The differences of dynamic characteristics between traditional propulsion device and rotary propulsion device are compared under the different steering and propeller speed conditions. The increment coefficient K is introduced to evaluate their steering performance. The result shows that the propeller characteristics and steering performance of traditional propelling device is better than that of rotary propulsion device when deflection angle is small relatively. The latter shows some superior properties under the condition of high speed and large rotation angle. These advantages increase significantly with speed and rotation angle.