Utilize este identificador para referenciar este registo: http://hdl.handle.net/10400.6/3623
Título: Numerical study of ground vortex formation
Autor: Maneta, M. Alexandre
Orientador: Barata, J. M. M.
Data de Defesa: 2009
Resumo: It is well known that under certain conditions, a tornado-like vortex is formed between an air inlet and a nearby solid wall. When a gas-turbine engine is operated / manoeuvred near a ground plane at static or near-static conditions, a strong vortex is often observed to form between the ground and the inlet. This so called inlet vortex (or ground vortex) can cause severe operational difficulties. With CFD tools, the ground vortex phenomenon has been simulated on a 1/1th scale model. Calculations have been performed under cross-wind ground vortice mode of formation. The effect of the height of the intake to the ground and the effect of the cross-flow velocity have been studied in term of velocities and turbulent kinetic energy, after which the study of the appearance and location of the vortice have been made. The cross-flow test showed the formation of one vortice at an upstream location. The study of the effect of cross-flow velocity and the effect of the height of the intake showed that are fulcral parameters for the appearance and strength of the vortice.
URI: http://hdl.handle.net/10400.6/3623
Designação: Dissertação apresentada à Universidade da Beira Interior para a obtenção do grau de mestre em Engenharia Aeronáutica
Aparece nas colecções:FE - DCA | Dissertações de Mestrado e Teses de Doutoramento

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