【摘要】 在Mcnabb摆线桨计算模型的基础上,提出了基于LB动态失速模型的改进的气动力计算模型。该模型可以计入叶片分离流动和叶片翼型升阻特性的影响,从而提高摆线桨悬停状态下的气动力计算精度。将计算结果与悬停时不同条件下的摆线桨的实验结果和原计算模型进行了对比,结果表明,所提出的计算模型具备很高的计算精度,可以用于摆线桨悬停状态下的气动性能设计与分析。通过对计算结果的分析,揭示了摆线桨具备高气动效率的部分机理。更多还原

【Abstract】 An improved aerodynamics force computation model for cycloidal propellers based on Leishman-Beddoes(LB) dynamical stall model is presented in this paper.The blade element lift and drag can be evaluated with high accuracy and the effects of the separating flow are also involved with the LB model.The comparisons are made among the experimental data,the results from Mcnabb model and the results from presented model.The comparisons prove that the presented model is more accurate than Mcnabb model and can be applicable for cycoidal propeller performance evaluation under hovering status.Based on the analysis with the calculation results,some of the mechanisms about how the efficiency of cycloidal propeller could be improved are also revealed.更多还原