What is it about?

The article explains a control theory named geometric control theory that is useful in the analysis of nonlinear systems. This theory is then applied to an oscillating airfoil undergoing dynamic stall to check if the oscillating motion of the airfoil affects the lift and drag forces it experiences.

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Why is it important?

Although oscillating wings have been studied for years, there is a lack of theoretical theories that help us understand the conditions in which this oscillating motion leads to an increase or decrease of the aerodynamic forces.

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This page is a summary of: Geometric control analysis of the unsteady aerodynamics of a pitching–plunging airfoil in dynamic stall, Physics of Fluids, March 2024, American Institute of Physics,
DOI: 10.1063/5.0190449.
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