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Notes on aerodynamic forces on airship hullsFor a first approximation the air flow around the airship hull is assumed to obey the laws of perfect (i.e. free from viscosity) incompressible fluid. The flow is further assumed to be free from vortices (or rotational motion of the fluid). These assumptions lead to very great simplifications of the formulae used but necessarily imply an imperfect picture of the actual conditions. The value of the results depends therefore upon the magnitude of the forces produced by the disturbances in the flow caused by viscosity with the consequent production of vortices in the fluid. If these are small in comparison with the forces due to the assumed irrotational perfect fluid flow the results will give a good picture of the actual conditions of an airship in flight.
Document ID
19930080922
Acquisition Source
Legacy CDMS
Document Type
Other
Authors
Tuckerman, L B (Bureau of Standards)
Date Acquired
September 6, 2013
Publication Date
March 1, 1923
Report/Patent Number
NACA-TN-129
Accession Number
93R10212
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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