TURBULENT SEPARATION AND UNSTEADINESS IN COMPOUND SHOCK/BOUNDARY LAYER INTERACTIONS
Abstract
Shock-wave turbulent boundary layer interactions (SBLI) occur extensively on all hypersonic vehicles, and can substantially impair controllability, performance and structural health. SBLI are profoundly non-linear in nature: the strong swept interactions of interest in this proposal are characterized by three-dimensional (3D) separation, formation of vortical structures, flow distortion, unsteadiness in structurally sensitive frequency bands and extreme thermo-mechanical loads. Although much is known about nominally two-dimensional (2D) SBLI through extensive experimental and simulation campaigns, equivalent knowledge of 3D swept interactions remains lacking. Recent studies on open (or simple) swept interactions have revealed intriguing new insights that indicate a profoundly different dynamics. These effects are altered when SBLI are compounded i.e., when two simple 3D SBLI interact with each other, as expected when two swept shock generators are placed in close proximity to each other. The goal of the present effort is to examine the turbulent field associated with strong simple and compounded swept interactions, in the context of turbulence mechanisms, unsteadiness and fluid-structural interactions.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Apr 20, 2023
- Source ID
- FA95502210399
Entities
People
- Farrukh S. Alvi
Organizations
- Air Force Office of Scientific Research
- Florida State University
- United States Air Force