Control Of Lagrangian Coherent Structures At Stagnation And Separation Locations On Airfoils
Abstract
To develop and test a transformative flow control framework that is based on four inter-connected strands: Lagrangian Coherent Structure (LCS) theory, advanced flow control optimization, direct numerical simulation, and laboratory experiments. The team will seek to identify the sensitivity of control of separated and reattached (stagnation) material lines that are formed by fluid particles in their Lagrangian frame. These separating and reattaching LCS are very likely the best candidates for application of a control forcing, since Lagrangian analysis provides an unprecedented exact time behavior of the near wall separation and stagnation LCS. The LCS skeleton away from the near-wall provides a global flow description that connect with lift and drag characteristics of airfoils and wings. Moreover, the team seeks to design a feedback system with a hierarchy of input-output models, including actuator-to-pressure, pressure-to-LCS, and LCS-to-lift models.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Dec 05, 2016
- Source ID
- FA95501610392
Entities
People
- Geoff Spedding
Organizations
- Air Force Office of Scientific Research
- United States Air Force
- University of Southern California