弹性变形对柔性飞艇气动特性的影响

设计加工具有相同几何外形的刚性飞艇模型和可变内压的柔性飞艇模型,并进行了低速风洞实验。研究了内压变化对柔性模型阻力和俯仰力矩特性的影响,比较了柔性模型和刚性模型气动特性的差异。实验结果表明,随着内压的增加柔性模型的阻力呈下降趋势;对于具有相同几何外形的柔性和刚性模型,柔性模型的阻力明显大于刚性模型;刚性模型的尾翼对俯仰力矩的影响较大。

Effect of elastic deformation on aerodynamic characteristics of the flexible airship

Two airship models having the same geometry outline,one is rigid and the other is flexible,were tested in the low-speed wind tunnel.The influence of the internal pressure change on drag and pitching moment characteristics was investigated,and the difference of aerodynamic characteristics for both models was compared.It is shown that aerodynamic drag of the flexible model presents a downward trend with the increase of internal pressure,and the aerodynamic drag of the flexible model is greater than the rigid one.As well,the empennages of the rigid model have greater impact on pitching moment than the flexible one.