Added Masses of generic shape bodies interacting with external walls
| Autor: | Giovanni Carbone, Guillaume Martinat, Jean-Luc Harion, Dominique Farcy |
|---|---|
| Přispěvatelé: | FLYING WHALES, Laboratoire de Mécanique des Fluides de Lille – Kampé de Fériet - UMR 9014 (LMFL), Centrale Lille-ONERA-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Arts et Métiers Sciences et Technologies, HESAM Université (HESAM)-HESAM Université (HESAM), Ecole nationale supérieure Mines-Télécom Lille Douai (IMT Lille Douai), Institut Mines-Télécom [Paris] (IMT), Laboratoire de Mécanique des Fluides de Lille – Kampé de Fériet (LMFL), Ecole Centrale de Lille-ONERA-École Nationale Supérieure d'Arts et Métiers (ENSAM), Arts et Métiers Sciences et Technologies, HESAM Université (HESAM)-HESAM Université (HESAM)-Arts et Métiers Sciences et Technologies, HESAM Université (HESAM)-HESAM Université (HESAM)-Université de Lille-Centre National de la Recherche Scientifique (CNRS), IMT Lille Douai, Institut Mines-Télécom [Paris] (IMT)-Institut Mines-Télécom [Paris] (IMT), HESAM Université - Communauté d'universités et d'établissements Hautes écoles Sorbonne Arts et métiers université (HESAM)-HESAM Université - Communauté d'universités et d'établissements Hautes écoles Sorbonne Arts et métiers université (HESAM) |
| Rok vydání: | 2019 |
| Předmět: |
[PHYS]Physics [physics]
Physics Surface (mathematics) 0209 industrial biotechnology DIRIGEABLES Inertial frame of reference Discretization MASSE AJOUTÉE Aerospace Engineering 02 engineering and technology Mechanics 01 natural sciences 010305 fluids & plasmas [SPI]Engineering Sciences [physics] Matrix (mathematics) 020901 industrial engineering & automation ADDED MASSES AIRSHIPS Volume (thermodynamics) Approximation error Simple (abstract algebra) 0103 physical sciences BOUNDARY ELEMENT METHOD Boundary element method EXTERNAL WALL INTERACTION |
| Zdroj: | Aerospace Science and Technology Aerospace Science and Technology, Elsevier, 2019, 90, pp.70-84. ⟨10.1016/j.ast.2019.04.035⟩ Aerospace Science and Technology, 2019, 90, pp.70-84. ⟨10.1016/j.ast.2019.04.035⟩ |
| ISSN: | 1270-9638 |
| DOI: | 10.1016/j.ast.2019.04.035 |
| Popis: | International audience; The aim of this paper is to propose an efficient method to evaluate the Added Masses of generic shape bodies in infinite fluid or in the proximity of external walls. The Added Masses (AM) are the result of the inertial reaction of the fluid in response to an accelerated movement of a body immersed in it. The AM effects are more evident when the body density is similar to that of the surrounding fluid, as in the case of airships. In the takeoff or landing phases, the proximity to the ground causes an increase in the Added Masses that must be correctly estimated to properly size the airship controls. In our method, the calculation of the Added Masses matrix is carried out by the Boundary Element Method (BEM). To verify the accuracy of the results, the study cases are based on simple shapes, whose Added Masses are well known. The analyses in infinite fluid and in the presence of a flat wall are carried out. Numerical results are compared to the theoretical values found in literature. The calculated Added Masses are intrinsically dependent on the mesh definition and the relative error, referred to the theoretical values, depends on the surface and volume discretiza-tion. In the case of interaction between geometries with complex shapes, the influence on the Added Masses is very difficult to predict without a numerical approach. The method proposed gives a good compromise in terms of quality of results and computational cost. |
| Databáze: | OpenAIRE |
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