The Effects of Freestream and Kinematic Perturbations on Oscillating Wings at Low Reynolds Numbers
Abstract
While flying in outdoor conditions crafts will be required to not only perform robustly when encountering variations in ambient flows (gusts) but also be capable of producing rapid changes in aerodynamic forces during voluntary aerial maneuvers. Our knowledge of the receptivity of unsteady flow occurring over dynamically stalling wings to freestream-induced perturbations remains limited yet the likelihood of such interactions is high due to the iniquitousness of wind unsteadiness in the outdoor environment across all atmospheric regimes. This project focuses on the effects of pitch perturbations on a rotating wing by systematically varying the initial pitch angle, the amplitude of oscillations, and the duration of perturbation. The effects are analyzed by comparing the force coefficients and the flow structure over the wing. The power transfer from the fluid to the wing is also computed using the torque measurements. In chapter 2, we report on streamline penetration, velocity error and consequences of fluid-structure interaction solver based on the immersed boundary method and the lattice Boltzmann method (IB-LBM). This work contributes to a high-fidelity numerical framework developed to study the effects of freestream and kinematic perturbations on oscillating wings.
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 18, 2023
- Accession Number
- AD1226920
Entities
People
- Qiuxiang Huang
- Shantanu S. Bhat
- Sridhar Ravi
Organizations
- University of New South Wales