双叶片推进器及其性能分析

Propeller Double Blades and its Perforcemance Analysis

提出了一种新型的流体推进器—双叶片推进器,通过对叶片的运动学和流体动力的分析,建立了该推进器性能参数的计算方法。对结构参数相同的两种推进器进行了性能分析研究,研究结果表明,双叶片推进器提高了主推力的稳定性,侧向推力小且变化较平稳,理论推进效率较高。

A new type of liquid propeller-double-blade propeller is discovered and its performance parameters are derived by means of kinematics analysis of the blade and loads applied on the blades.An example is given for comparing the performance parameters of the double-blade propeller with a single-blade propeller's in the same mechanism size using the derived equations.The results demonstrate that the propulsion force of the double-blade propeller is increased in frequency but decreased in fluctuation,and the lateral force is reduced in magnitude but increased in frequency,and the propulsion efficiency in theory is about 66%.