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仿昆虫扑翼微型飞行器设计参数对气动特性的影响分析

发表时间:2012-02-15  浏览量:1209  下载量:562
全部作者: 周超,吴江浩,郭静晗
作者单位: 北京航空航天大学交通科学与工程学院
摘 要: 采用计算流体力学方法研究仿昆虫扑翼的微型飞行器(micro air vehicle, MAV)翼的设计参数对气动特性的影响。结果表明:悬停时,扑翼迎角、拍动幅度和拍动频率对平均升力和瞬时阻力影响明显;反向改变扑翼迎角对平均阻力影响较大,可产生所需的推力或阻力实现前飞或后飞;增大扑翼翼型厚度、减小展弦比会减小气动力,但对平均阻力都几乎没影响;翻转运动的转轴位置对气动力的平均值影响不超过5%;前飞和上飞的气动力变化主要是由于有效迎角的改变所引起。在一定尺寸范围内,选择较大迎角、幅度和频率,采用较薄的大展弦比机翼,可获得较大的平均升力保持悬停。通过改变上下拍迎角,使其反向变化可控制飞行器的飞行状态;左右翼采用不同的参数可获得很好的控制力和力矩,用于横向控制。
关 键 词: 流体力学;微型飞行器;扑翼;气动特性
Title: Effect of design parameters to aerodynamic performance in insect-like flapping wing micro-air-vehicle
Author: ZHOU Chao, WU Jianghao, GUO Jinghan
Organization: School of Transportation Science and Engineering, Beihang University
Abstract: The effect of design parameters to aerodynamic performance in insect-like flapping wing micro air vehicle (MAV) is studied using computational fluid dynamics (CFD). It is shown that the effect of angle of attack in translation, flapping amplitude and frequency on average lift and transient drag of the wing is significant in hovering. The average drag is offected greatly by adversely changing the angle of attack which can generate drag or thrust for backward or forward flight. Increasing the airfoil thickness and decreasing the aspect ratio may decrease the aerodynamic forces, but they have little influence on average drag. The effect of the rotation axis position dosen�t exceed 5%. forward and upward flight could change the aerodynamic forces which is resulted from the change of effective angle of attack. Under a certain size range, the larger angle of attack, flapping amplitude and frequency, thinner airfoil with greater aspect ratio can generate greater lift to keep hovering. Adversely changing the angle of attack in upstroke and downstroke can control flight direction, lateral control can be operated by using different parameters in two wings.
Key words: fluid mechanics; micro air vehicle; flapping wing; aerodynamic performance
发表期数: 2012年2月第3期
引用格式: 周超,吴江浩,郭静晗. 仿昆虫扑翼微型飞行器设计参数对气动特性的影响分析[J]. 中国科技论文在线精品论文,2012,5(3):260-267.
 
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