微型飞行器气动力估算研究

【作者】 朱标；

【导师】 宋文萍；

【作者基本信息】 西北工业大学 ， 流体力学， 2005， 硕士

【摘要】 微型飞行器(MAVs)是飞行器发展的一个新的方向,由于微型飞行器在民用和军用领域内潜在的应用价值,世界范围内正呈现出微型飞行器研究的热潮。 本文是在势流理论的基础上,使用非定常涡格法分别对微型扑翼飞行器和固定翼飞行器进行了气动性能的计算,分析了平均迎角、最大俯仰角、最大扑动角、减缩频率等参数对微型飞行器的气动特性的影响。本文主要进行了以下几个方面的工作: 1.推导了非定常涡格法的计算公式,编制了估算程序。 2.研究了各运动参数对扑翼的气动性能的影响,为扑翼型微型飞行器的进一步设计研究打下了基础。 3.初步研究了固定翼型微型飞行器的气动性能,探讨了螺旋桨滑流对微型飞行器气动性能的影响。 本文的计算结果与分析表明,本文所使用的方法是正确的,所得到的结果是可靠的;得出的结论对以后微型飞行器的初期设计具有一定的指导意义。更多还原

【Abstract】 MAVs represent a newly developing direction of aircraft, because MAVs have some special roles both in civil and military applications, so many of researchers devote to this field all over the world.In this thesis, on the basis of theory of potential flow, employed UVLM(unsteady vortex-lattice method) to study the aerodynamic characteristics of flapping wing and fixed wing. The factors which affect on the aerodynamic characteristics are analyzed. The main work of this dissertation is as follows:1. Equations of UVLM are derived, and the computational program based on these equations is programmed.2. Some parameters are studied on the aerodynamic characteristics of flapping wing, these results supply some references to the future researches of flapping wing MAV.3. The effects of propeller slipstream on aerodynamic characteristics of fixed wing are also investigated.As the computational results are in good agreement with reference data, so the method applied in this dissertation is correct and reliable, conclusions of this paper can supply some qualitative instructions to MAVs research.更多还原