On the aerodynamic parameter model of the stratospheric airship

In this paper the existing aerodynamic parameter models for airships are compared and investigated. Generally the aerodynamic parameter models come into two categories and the difference between the two categories is significant. One aerodynamic parameter model is mostly adopted by American scholars while the other model is mostly focused by airship researchers from Russia. However, both of the two models have some unreasonable aspects. For example, the model that mostly adopted by American scholars, is constructed based on the research results which was given by Munk. Though the results given by Munk is correct, the construction of this model does not totally harmonize with the results. On the other hand, the core idea for the other model is that, viscous and non-viscous aerodynamic parts constitute the aerodynamic of airships. Nonviscous aerodynamic part is given by Lamb´s research results, and the viscous aerodynamic part can be obtained by the detailed experiment data. Particularly, the non-viscous and the viscous parts can overlap. In this point, the model that focused by Russian researchers can be improved if the overlapped part can be revealed further. Hence this paper proposes a novel aerodynamic parameter model for airships based on the Russian model by further investigating how the non-viscous and viscous aerodynamic parts overlap.