STUDY OF SHOCK-WAVE/BOUNDARY-LAYER INTERACTION ON THE STORT CONFIGURATION
Abstract
Study of Shock-Wave/Boundary-Layer Interaction (SWBLI) is one of the design driver parameters for high speed flight vehicles. Maximum mean and fluctuating pressure levels and thermal loads that a structure is exposed to are generally found in regions of shock/boundary-layer and shock/shear-layer interaction and can effect vehicle and component geometry, structural integrity, material selection, fatigue life, the design of thermal protection systems, weight, and cost. Shock induced boundary layer transition can lead to heat flux amplification by a factor up to six. Furthermore shock wave boundary layer interaction may cause significant pressure fluctuation, which could create a risk to structures, which are exposed to such loads. Despite truly significant progress in computational infrastructure and measurement capabilities, peak heating in strong interaction regions and unsteady pressure loads cannot be predicted accurately. Limited understanding and modelling of physical processes are the main reasons of this shortcoming. Because of higher noise level in the free stream of conventional wind tunnels compared to the flight the boundary transition Reynolds number is below the flight transition Reynolds number. Hypersonic flight experiments are expensive and cannot be carried out frequently. Therefore their design and post flight analysis need to be performed very carefully using complementary tools, since each of the design tool has certain shortcomings. Therefore the application of the DLR CFD code TAU in comparison with well-established CFD tools of US universities on both ground experiments and STORT SWBLI experiment will allow much better physical understanding of the SWBLI induced aerothermal heating and reduction of design margins for future flight configurations.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Aug 11, 2021
- Source ID
- FA86552017038
Entities
People
- Ali Guelhan
Organizations
- Air Force Office of Scientific Research
- German Aerospace Center
- United States Air Force