Laminar-to-Turbulence Transition in Hypersonic Boundary Layers: Model Interactions and Sensitivities to Mean-Flow Distortions
Abstract
The objective of this research is to provide the first assessment of modal interactions in hypersonic boundary layers in order to predict and explain its physics and ultimately to effectively delay transition onset. Turbulence first appears in the transition zone in localized patches known as turbulent spots. These isolated regions will be identified, isolated, and studied in detail in order to delineate their contribution to the excessive heat transfer and skin friction rates observed in the transition zone. This effort aims to concentrate on the following four focus areas: 1) Mode interactions, energy diffraction and transition, 2) Modal sensitivity to mean-flow distortion and transition delay, 3) Time-dependent mean-flow modulation to stabilize the boundary layer, and 4) The dynamical and structural characteristics of non-equilibrium turbulent spots.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Apr 08, 2016
- Source ID
- FA95501610103
Entities
People
- Tamer A. Zaki
Organizations
- Air Force Office of Scientific Research
- Johns Hopkins University
- United States Air Force