Flow Physics and Control of 3-D Separation on Finite Span, Tapered and Swept Wings
Abstract
The proposed coordinated experimental-numerical-theoretical research project aims to achieve deeper physical understanding of separated flows over 3-D geometries. Focus will be placed on the formation and interaction of 3-D vortical structures over finite-span, swept, tapered and cantilevered wings. The dynamical evolution of these structures will be explored as a function of sweep, taper ratio and aspect ratio for a range of angles of attack and Reynolds numbers. Our objective is to further expand understanding of 3-D separation and wake instabilities resulting from complex wing configurations and thus complete current knowledge of flows around 3-D wings. The experiments will explore the conditions and mechanisms responsible for the formation of 3-D flow structures over a wide range of Reynolds numbers O(10-100,000). The numerical effort will perform high-fidelity parametric DNS and LES of the 3-D separated flows to analyze detailed dynamics of wake vortices and separation patterns. Simulated cases will be chosen in discussions with experimental and theoretical counterparts to provide maximum coverage of the parameter space and cross-verify among the three groups. State-of-the-art linear TriGlobal instability and resolvent analyses will be used to unravel, for the first time, global eigenmodes and resolvent modes of the wings. Analysis will also propose theoretically-founded flow control methodologies, which will be verified experimentally and numerically. Steady laminar and time-averaged mean turbulent flows will be analyzed at low and high Reynolds numbers, respectively. The randomized resolvent analysis and low-rank matrix approximation developed recently will be leveraged to analyze high Re-flows. The physical insights gained will provide extraordinary level of knowledge on the origin of complex 3-D structures and will support the development of enhanced physics-based flow control strategies to improve aerodynamic performance of current and future air vehicles.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Mar 07, 2023
- Source ID
- FA95502110174
Entities
People
- Michael Amitay
Organizations
- Air Force Office of Scientific Research
- Rensselaer Polytechnic Institute
- United States Air Force