李天娥, 孙晓颖, 武岳, 王长国. 平流层飞艇气动阻力的参数分析[J]. 工程力学, 2019, 36(1): 248-256. DOI: 10.6052/j.issn.1000-4750.2017.11.0814
引用本文: 李天娥, 孙晓颖, 武岳, 王长国. 平流层飞艇气动阻力的参数分析[J]. 工程力学, 2019, 36(1): 248-256. DOI: 10.6052/j.issn.1000-4750.2017.11.0814
LI Tian-e, SUN Xiao-ying, WU Yue, WANG Chang-guo. PARAMETER ANALYSIS OF AERODYNAMIC DRAG FORCE IN STRATOSPHERIC AIRSHIP[J]. Engineering Mechanics, 2019, 36(1): 248-256. DOI: 10.6052/j.issn.1000-4750.2017.11.0814
Citation: LI Tian-e, SUN Xiao-ying, WU Yue, WANG Chang-guo. PARAMETER ANALYSIS OF AERODYNAMIC DRAG FORCE IN STRATOSPHERIC AIRSHIP[J]. Engineering Mechanics, 2019, 36(1): 248-256. DOI: 10.6052/j.issn.1000-4750.2017.11.0814

平流层飞艇气动阻力的参数分析

PARAMETER ANALYSIS OF AERODYNAMIC DRAG FORCE IN STRATOSPHERIC AIRSHIP

  • 摘要: 为了研究环境参数及外形布局对平流层飞艇气动阻力的影响,在验证CFD数值模拟方法的基础上,从气动阻力包括压差阻力与摩擦阻力的角度探讨了风速、动力粘度系数、空气密度、Re数、长细比及尾翼对飞艇气动阻力的影响规律及机理。结果表明:气动阻力系数随风速与空气密度的增加而减小,随动力粘度系数的增加而增加;气动阻力系数随Re数减小的趋势,取决于摩擦阻力系数随Re数的减小趋势;随长细比的增加,摩擦阻力系数呈现增加趋势,但气动阻力系数呈现先减小后增加的趋势;尾翼对气动阻力系数的影响主要体现在压差阻力系数的改变。

     

    Abstract: To explore the influence of environmental parameters and shape layout on the aerodynamic drag force of a stratospheric airship, the parameters of wind velocity, dynamic viscosity coefficient, air density, Re, slenderness ratio and fins were studied based on the verified CFD numerical simulation method. And the influencing rule and mechanism of all the above parameters on aerodynamic drag forces were investigated by the constituent parts of aerodynamic drag forces that are differential pressure drag forces and frictional drag forces. The analytical results indicate that the aerodynamic drag force coefficient decreases as the increase of wind velocity and air density but increases as the increase of dynamic viscosity coefficient. The decreasing trend of the aerodynamic drag force coefficient as the Re depends on the decreasing trend of the frictional drag force coefficient. As the slenderness ratio increases, the frictional drag force coefficient appears an increase trend, but the aerodynamic drag force coefficient decreases at first and then increases. The effect of the fins on the aerodynamic drag force coefficient is mainly reflected in the change of the differential pressure drag force coefficient.

     

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