Vortex moment map for unsteady incompressible viscous flows

Li, Juan; Wang, Yinan; Graham, J. M. R.; Zhao, Xiaowei

doi:10.1017/jfm.2020.145

Cited by 11 publications

(8 citation statements)

References 29 publications

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“…Although the aeroservoelastic model developed in this work has similar fidelity as an existing model using a linear vortex panel method (VPM) [31], it can be easily coupled with nonlinear aerodynamic models (e.g. the vortex force [32] and moment [33] map methods developed by us for load estimation in unsteady separating flows)…”

Section: Discussionmentioning

confidence: 99%

Model free adaptive control of large and flexible wind turbine rotors with controllable flaps

Wang²,

Zhao³

et al. 2021

Renewable Energy

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Section: Discussionmentioning

confidence: 99%

Model free adaptive control of large and flexible wind turbine rotors with controllable flaps

Wang²,

Zhao³

et al. 2021

Renewable Energy

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“…An extension to three-dimensional flows with application to a delta wing was later demonstrated by Li, Zhao & Graham (2020 b ), and the extension to the moment on an aerofoil was demonstrated by Li et al. (2020 a ). This was followed by the treatment of low Reynolds number flows in Li et al.…”

Section: Introductionmentioning

confidence: 92%

“…Moreover, the map provides a visual display of the force-producing and -reducing critical regions and directions. An extension to three-dimensional flows with application to a delta wing was later demonstrated by Li, Zhao & Graham (2020b), and the extension to the moment on an aerofoil was demonstrated by Li et al (2020a). This was followed by the treatment of low Reynolds number flows in Li et al (2021), extending the VFM method to more general cases for a wider range of Reynolds numbers (from O(10) to O(1 × 10 6 )) by adding the viscous-pressure force and skin-friction force contributions to the total force.…”

Section: Introductionmentioning

confidence: 98%

Vortex force map for incompressible multi-body flows with application to wing–flap configurations

Wang

Zhao²,

Graham³

et al. 2022

J. Fluid Mech.

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The vortex force map method for incompressible viscous flows with multiple bodies is derived in this work. The method breaks the fluid force into inertial, vortex-pressure, viscous-pressure and skin-friction components, and it could be used to analyse the fluid dynamic forces on individual bodies in a multi-body assembly. For the first time, we provide a graphical representation of the vortex-pressure force – the vortex force map – for individual bodies in a multi-body assembly. We have shown that the vortex force map in a multi-body set-up differs from single-bodied counterparts from modifications to their hypothetical potential through a nonlinear cross-coupling, and that the inertial and viscous-pressure contributions contain influences from other bodies explicitly. We then demonstrate the multi-body vortex force decomposition method with a wing–flap starting flow problem using computational fluid dynamics data, identifying the positive and negative force-generating critical regions or directions. It is found that the dominant force is the vortex-pressure force, and the force variation against time is closely related to the evolution of the vortex structures. Furthermore, we showed that the existence of another body significantly alters the force contribution roles of vortices in the flow.

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“…More recently, Li et al. (2020 a ) proposed the concept of vortex-moment maps for two dimensional bodies of arbitrary shape to analyse the contribution to the pitching moment from a given vortex in the flow field. In another recent work, a three-dimensional extension of the force-map approach was used by Li, Zhao & Graham (2020 b ) to gain insight into the effect of vortical structures on the unsteady force of a delta wing.…”

Section: Decomposition Of the Leading-edge Suction Parameter (Lesp )mentioning

confidence: 99%

Theoretical and experimental investigation of an unsteady airfoil in the presence of external flow disturbances

et al. 2021

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Vortex moment map for unsteady incompressible viscous flows

Cited by 11 publications

References 29 publications

Model free adaptive control of large and flexible wind turbine rotors with controllable flaps

Model free adaptive control of large and flexible wind turbine rotors with controllable flaps

Vortex force map for incompressible multi-body flows with application to wing–flap configurations

Theoretical and experimental investigation of an unsteady airfoil in the presence of external flow disturbances

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