Added masses computation for unconventional airships and aerostats through geometric shape evaluation and meshing

Tuveri, M, Ceruti, A and Marzocca, P 2014, 'Added masses computation for unconventional airships and aerostats through geometric shape evaluation and meshing', International Journal of Aeronautical and Space Sciences, vol. 15, no. 3, pp. 241-257.


Document type: Journal Article
Collection: Journal Articles

Title Added masses computation for unconventional airships and aerostats through geometric shape evaluation and meshing
Author(s) Tuveri, M
Ceruti, A
Marzocca, P
Year 2014
Journal name International Journal of Aeronautical and Space Sciences
Volume number 15
Issue number 3
Start page 241
End page 257
Total pages 17
Publisher Korean Society for Aeronautical and Space Sciences
Abstract The modern development in design of airships and aerostats has led to unconventional configurations quite different from the classical ellipsoidal and spherical ones. This new class of air-vehicles presents a mass-to-volume ratio that can be considered very similar to the density of the fluid displaced by the vehicle itself, and as a consequence, modeling and simulation should consider the added masses in the equations of motion. The concept of added masses deals with the inertia added to a system, since an accelerating or decelerating body moving into a fluid displaces a volume of the neighboring fluid. The aim of this paper is to provide designers with the added masses matrix for more than twenty Lighter Than Air vehicles with unconventional shapes. Starting from a CAD model of a given shape, by applying a panel-like method, its external surface is properly meshed, using triangular elements. The methodology has been validated by comparing results obtained with data available in literature for a known benchmark shape, and the inaccuracies of predictions agree with the typical precision required in conceptual design. For each configuration, a CAD model and a related added masses matrix are provided, with the purpose of assisting the practitioner in the design and flight simulation of modern airships and scientific balloons.
Subject Aerospace Engineering not elsewhere classified
Keyword(s) Added Masses
Panel Method
Lighter Than Air Vehicles
Airships
Aerostats
DOI - identifier 10.5139/IJASS.2014.15.3.241
Copyright notice © 2014 Korean Society for Aeronautical and Space Sciences
ISSN 2093-274X
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