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A Hybrid Model for Lift Response to Dynamic Actuation on a Stalled Airfoil

Author

Listed:
  • Xuanhong An

    (Department of Mechanical & Aerospace Engineering, Princeton University, Princeton, NJ 08544, USA)

  • David R. Williams

    (Department of Mechanical, Materials, and Aerospace Engineering, Illinois Institute of Technoogy, Chicago, IL 60616, USA)

  • Maziar S. Hemati

    (Department of Aerospace Engineering & Mechanics, University of Minnesota, Minneapolis, MN 55455, USA)

Abstract

The current research focuses on modeling the lift response due to dynamic (time-varying) “burst-type” actuation on a stalled airfoil. Here, the “burst-type” actuation refers to the synthetic jet (generated from the actuator) that is used for flow separation mitigation. Dynamic “burst-type” actuation exhibits two different characteristic dynamic behaviors within the system; namely, the high-frequency and low-frequency components. These characteristics introduce modeling challenges. In this paper, we propose a hybrid model composed of two individual sub-models, one for each of the two frequencies. The lift response due to high-frequency burst actuation is captured using a convolution model. The low-frequency component due to nonlinear burst-burst interactions is captured using a Wiener model, consisting of linear time-invariant dynamics and a static output nonlinearity. The hybrid model is validated using data from wind tunnel experiments.

Suggested Citation

  • Xuanhong An & David R. Williams & Maziar S. Hemati, 2020. "A Hybrid Model for Lift Response to Dynamic Actuation on a Stalled Airfoil," Energies, MDPI, vol. 13(4), pages 1-12, February.
    • Handle: RePEc:gam:jeners:v:13:y:2020:i:4:p:855-:d:321110
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