带升力风扇飞翼布局开口机翼气动特性研究
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摘要
为获得带升力风扇飞翼布局飞机因开口对机翼气动特性的影响规律,对平飞状态下开口机翼的气动特性进行三维气动仿真,分析升力系数、阻力系数和力矩系数随来流速度和迎角变化的特性。结果表明:随着来流速度增大,阻力和力矩呈上升趋势;来流速度一定时,随着迎角加大,升力系数增大,阻力系数先减小后增大;随着迎角增大,力矩系数先减小后增大再减小,且一直产生低头力矩。
In order to obtain the effect laws of the openings on the aerodynamic characteristics of the flying wing configuration aircraft with lift-fan,the three-dimensional aerodynamics characteristics simulation of the opening wing was proceeded in level flight condition,and the characteristics of lift coefficient,drag coefficient and moment coefficient changing with the flow velocity and angle of attacked were analyzed.Results show that the drag coefficient and moment coefficient are on the rise with the increasing of the velocity. Under the same flow velocity,with the increasing of angle of attack,the lift coefficients increase,the drag coefficients are decreased firstly and then increased; the moment coefficients are decreased firstly and then increased and decreased,and always produce down moment.
In order to obtain the effect laws of the openings on the aerodynamic characteristics of the flying wing configuration aircraft with lift-fan,the three-dimensional aerodynamics characteristics simulation of the opening wing was proceeded in level flight condition,and the characteristics of lift coefficient,drag coefficient and moment coefficient changing with the flow velocity and angle of attacked were analyzed.Results show that the drag coefficient and moment coefficient are on the rise with the increasing of the velocity. Under the same flow velocity,with the increasing of angle of attack,the lift coefficients increase,the drag coefficients are decreased firstly and then increased; the moment coefficients are decreased firstly and then increased and decreased,and always produce down moment.
引文
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[3]祝小平.考虑非线性影响的飞翼布局无人机多舵面分配方法研究[D].西安:西北工业大学,2014.
[4]马松辉,吴成富,陈怀民.飞翼飞机稳定性与操纵性研究[J].飞行力学,2006,24(3):17-21.
[5]李进涛.飞翼式高空长航时无人机飞行品质特性研究[D].西安:西北工业大学,2007.
[6]张彬乾,罗烈,陈真利,等.飞翼布局隐身翼型优化设计[J].航空学报,2014,35(4):957-967.
[7]李怡勇,沈怀柔,高飞.发展高空长航时无人机初探[J].飞航导弹,2005(8):16-20.
[8]李爱军,沈毅,章卫国.发展中的高空长航时无人机[J].航空科学技术,2001(2):34-36.
[9]郑志成,周洲.垂直起降飞机设计中升力风扇估算模型分析[J].飞行力学,2010,28(3):21-23.
[10]库罗奇金.垂直起落飞机设计原理[M].北京:国防工业出版社,1973:21-26.
[11]昌敏,周洲,郑志成.升力风扇垂直起降飞机过渡态总体参数分析[J].西北工业大学学报,2013,31(3):406-412.
[12]张炜,张引妮,蒋汉杰,等.带升力风扇飞翼布局无人机过渡飞行气动特性研究[J].航空工程进展,2014,5(2):193-200.
[13]林玉祥,王琦,李卫,等.带升力风扇飞翼布局飞机机翼开口处二维气动特性研究[J].南昌航空大学学报(自然科学版),2015,29(3):21-25.