Characterization of Aerodynamic Forces on Wings in Plunge Maneuvers

Moriche, Manuel; Sedky, Girguis; Jones, Anya R.; Flores, Oscar; García-Villalba, Manuel

doi:10.2514/1.j059689

Cited by 10 publications

(8 citation statements)

References 35 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The bodies are discretized using layers of Lagrangian points, with a spacing between the points defined following the recommendations given in Uhlmann (2005). A validation of such an approach for the simulations of thin plates can be found in Moriche et al (2021). For each simulation t/T = 0.025 r/C, ensuring CFL = U max t/ r < 0.2 (where U max is the maximum flow velocity in the domain).…”

Section: Discussionmentioning

confidence: 99%

Flow interaction of three-dimensional self-propelled flexible plates in tandem

2021

View full text Add to dashboard Cite

Tandem configurations of two self-propelled flexible flappers of finite span are explored by means of numerical simulations. The same sinusoidal vertical motion is imposed on the leading edge of both flappers, but with a phase shift ( $\phi$ ). In addition, a vertical offset, $H$ , is prescribed between the flappers. The configurations that emerge are characterized in terms of their hydrodynamic performance and topology. The flappers reach a stable configuration with a constant mean propulsive speed and a mean equilibrium horizontal distance. Depending on $H$ and $\phi$ , two different tandem configurations are observed, namely compact and regular configurations. The performance of the upstream flapper (i.e. the leader) is virtually equal to the performance of an isolated flapper, except in the compact configuration, where the close interaction with the downstream flapper (i.e. the follower) results in higher power requirements and propulsive speed than an isolated flapper. Conversely, the follower's performance is significantly affected by the wake of the leader in both regular and compact configurations. The analysis of the flow shows that the follower's performance is influenced by the interaction with the vertical jet induced by the vortex rings shed by the leader. This interaction can be beneficial or detrimental for the follower's performance, depending on the alignment of the jet velocity with the follower's vertical motion. Finally, a qualitative prediction of the performance of a hypothetical follower is presented. The model is semi-empirical, and it uses the flow field of an isolated flapper.

show abstract

Section: Discussionmentioning

confidence: 99%

Flow interaction of three-dimensional self-propelled flexible plates in tandem

2021

View full text Add to dashboard Cite

show abstract

“…For further details on the immersed boundary method described above, the reader is referred to Uhlmann [12]. This algorithm has been implemented in a flow solver called TUCAN, which has been successfully used for the simulation of rigid-bodies with prescribed kinematics [40,41,42,43,44,45]. Likewise, the free motion of a single-rigid body immersed in a fluid has been also successfully simulated [46,47], using the coupling method presented in Uhlmann [12].…”

Section: Flow Solvermentioning

confidence: 99%

Fluid-structure interaction of multi-body systems: Methodology and applications

Arranz,

Martínez-Muriel,

Flores

et al. 2022

Preprint

Self Cite

View full text Add to dashboard Cite

We present a method for computing fluid-structure interaction problems for multi-body systems. The fluid flow equations are solved using a fractional-step method with the immersed boundary method proposed by Uhlmann [J. Comput Phys. 209 (2005) 448]. The equations of the rigid bodies are solved using recursive algorithms proposed by Felis [Auton. Robot 41 (2017) 495]. The two systems of equations are weakly coupled, so that the resulting method is cost-effective. The accuracy of the method is demonstrated by comparison with two-and three-dimensional cases from the literature: the flapping of a flexible airfoil, the self-propulsion of a plunging flexible plate, and the flapping of a flag in a free stream. As an illustration of the capabilities of the proposed method, two three-dimensional bio-inspired applications are presented: an extension to three dimensions of the plunging flexible plate and a simple model of spider ballooning.

show abstract

“…In this work we employ the direct forcing formulation proposed by Uhlmann [45]. TUCAN has been successfully used for the simulation of aerodynamic flows, both in two- [46,47] and three-dimensions [48,49,50,51,52,53,54].…”

Section: Computational Set-upmentioning

confidence: 99%

Numerical simulation of flow over flapping wings in tandem: wingspan effects

Jurado,

Arranz,

Flores

et al. 2022

Preprint

Self Cite

View full text Add to dashboard Cite

We report direct numerical simulations of a pair of wings in horizontal tandem configuration, to analyze the effect of their aspect ratio on the flow and the aerodynamic performance of the system. The wings are immersed in a uniform free-stream at Reynolds number Re = 1000, and they undergo heaving and pitching oscillation with Strouhal number St = 0.7. The aspect ratios of forewing and hindwing vary between 2 and 4. The aerodynamic performance of the system is dictated by the interaction between the trailing edge vortex (TEV) shed by the forewing and the induced leading edge vortex formed on the hindwing. The aerodynamic performance of the forewing is similar to that of an isolated wing irrespective of the aspect ratio of the hindwing, with a small modulating effect produced by the forewing-hindwing interactions. On the other hand, the aerodynamic performance of the hindwing is clearly affected by the interaction with the forewing's TEV. Tandem configurations with a larger aspect ratio on the forewing than on the hindwing result in a quasi-two-dimensional flow structure on the latter. This yields an 8% increase in the time-averaged thrust coefficient of the hindwing, with no change in its propulsive efficiency.

show abstract

Characterization of Aerodynamic Forces on Wings in Plunge Maneuvers

Abstract: to initiate your request. See also AIAA Rights and Permissions www.aiaa.org/randp.

Cited by 10 publications

References 35 publications

Flow interaction of three-dimensional self-propelled flexible plates in tandem

Flow interaction of three-dimensional self-propelled flexible plates in tandem

Fluid-structure interaction of multi-body systems: Methodology and applications

Numerical simulation of flow over flapping wings in tandem: wingspan effects

Contact Info

Product

Resources

About