Leung, Jordan, Wong, Jamie, Weymouth, Gabriel and Rival, David (2018) Modelling transverse gusts using pitching, plunging and surging airfoil motions. AIAA Journal. (doi:10.2514/1.J056961).
Abstract
Three model-motions were developed to replicate the aerodynamic response of a transverse gust. These motions included a pure-plunging and two three degree-of-freedom motions that approximated the angle-of-attack distribution produced by the gust. Using inviscid models and viscous flow simulations, the response of the gust and model-motions were compared as a function of the non-dimensional reduced frequency. The inviscid model was found to overestimate the influence of the rotational added-mass in the three degree-of-freedom motions. In contrast, the viscous flow simulations showed that the two primary sources of discrepancy between the gust and model-motions lie in the non-linear angle-of-attack distribution caused by the gust, and the wake development during the model-motions. Flow simulations showed that all three motions experienced greater than 90% agreement in lift for gusts with reduced frequencies less than 0.5, indicating that under this reduced frequency: 1) the effect of the gust convection is minimal; and 2) a pure-plunging motion may suffice for modelling gusts. However, at higher reduced frequencies the pure-plunging motion experiences greater than 10% worse agreement than the three degree-of-freedom motions. Overall, the motions provide a good approximation with greater than 90% accuracy in lift for gusts of reduced frequencies less than k = 0.75.
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- Faculties (pre 2018 reorg) > Faculty of Engineering and the Environment (pre 2018 reorg) > Southampton Marine & Maritime Institute (pre 2018 reorg)
- Faculties (pre 2018 reorg) > Faculty of Engineering and the Environment (pre 2018 reorg) > Civil Maritime & Env. Eng & Sci Unit (pre 2018 reorg) > Fluid Structure Interactions Group (pre 2018 reorg)
Current Faculties > Faculty of Engineering and Physical Sciences > School of Engineering > Civil, Maritime and Environmental Engineering > Civil Maritime & Env. Eng & Sci Unit (pre 2018 reorg) > Fluid Structure Interactions Group (pre 2018 reorg)
Civil, Maritime and Environmental Engineering > Civil Maritime & Env. Eng & Sci Unit (pre 2018 reorg) > Fluid Structure Interactions Group (pre 2018 reorg)
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