Sebastian Willems
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View article: Aerodynamic interactions of blunt bodies free-flying in hypersonic flow
Aerodynamic interactions of blunt bodies free-flying in hypersonic flow Open
This paper takes a new look at how the aerodynamic interactions of multiple bodies in high-speed flow affect their motion behaviors. The influence of the body shape and orientation on aerodynamic and stability behavior in the case of shock…
View article: Selected results of the hypersonic flight experiment STORT
Selected results of the hypersonic flight experiment STORT Open
The three-stage rocket configuration of the hypersonic experiment STORT with several scientific payloads concerning hypersonic technologies was launched successfully from the Andøya Space launch site in northern Norway on 26th June 2022. T…
View article: Experiments on aerothermoelastic fluid–structure interaction in hypersonic flow
Experiments on aerothermoelastic fluid–structure interaction in hypersonic flow Open
Aerothermoelastic fluid-structure interaction (FSI) is a crucial problem in the design of supersonic and hypersonic vehicles, but modeling capabilities are in many cases quite limited. Insufficient treatment of FSI can limit design options…
View article: Shock interaction induced heat flux augmentation in hypersonic flows
Shock interaction induced heat flux augmentation in hypersonic flows Open
This paper gives a summary of dedicated experiments on the shock interaction induced heat flux augmentation, by means of tests carried out in the hypersonic wind tunnel H2K. The first test case is devoted to the shock boundary layer intera…
View article: Aerodynamics of inclined cylindrical bodies free-flying in a hypersonic flowfield
Aerodynamics of inclined cylindrical bodies free-flying in a hypersonic flowfield Open
The influence of the flight attitude on aerodynamic coefficients and static stability of cylindrical bodies in hypersonic flows is of interest in understanding the re/entry of space debris, meteoroid fragments, launch-vehicle stages and ot…
View article: Experiments on Aerothermal Supersonic Fluid-Structure Interaction
Experiments on Aerothermal Supersonic Fluid-Structure Interaction Open
Mastering aerothermal fluid-structure interaction (FSI) is crucial for the efficient and reliable design of future (reusable) launch vehicles. However, capabilities in this area are still quite limited. To address this issue, a multidiscip…
View article: Interactions between asteroid fragments during atmospheric entry
Interactions between asteroid fragments during atmospheric entry Open
The current work explores the interactions between asteroid fragments and the associated flow topology to motivate a physically consistent representation of the fragmentation process following a fragmentation event during atmospheric entry…
View article: Superposition Method for Force Estimations on Bodies in Supersonic and Hypersonic Flows
Superposition Method for Force Estimations on Bodies in Supersonic and Hypersonic Flows Open
Aerodynamic interactions of fragments of meteoroids and space debris during atmospheric entry influence the flight trajectories of the fragments and their strewn field on the Earth’s surface as well as the meteoroids’ airburst altitude and…
View article: Free transition on a slender cone in a quiet and a conventional wind tunnel and the effect of ultrasonically absorptive materials
Free transition on a slender cone in a quiet and a conventional wind tunnel and the effect of ultrasonically absorptive materials Open
Transition from laminar to turbulent hypersonic boundary layers is the topic of several research projects world-wide. Most experimental work is done in conventional wind tunnels, although their free stream turbulence does not match free fl…