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Activity title

Hypersonic Boundary-Layer Transition Prediction

Activity Reference

AVT-240

Panel

Applied Vehicle Technology

Security Classification

NATO UNCLASSIFIED

Status

Active

Activity type

RTG

Start date

2015

End date

2017

Keywords

Boundary Layer, Experiment, Hypersonics, Simulation, Transition

Background

Hypersonic vehicles offer large potentials for improvement in warfighting, since high speed increases survivability, offers a response to counter-stealth technology, and makes them natural for attack of time-critical targets, and for missile defense. Transition is critical to the successful design of these vehicles, since it can have a large effect on aeroheating and aerodynamic controls. Although researchers have been working toward mechanism-based prediction methods, designers are still using empirical methods, and a gap has developed between the two groups that needs to be closed. It appears that definitive progress will now be possible by coordinating international research efforts in a difficult but important area.

Objectives

The proposed Task Group is to facilitate an international collaboration of leading experimentalists and numerical simulation experts towards improved hypersonic prediction capabilities. The simulation approaches will be mechanism-based and the team will use new opportunities for validation in ground facilities.

Topics

Details are supplied in the TOR. Subtasks include transition induced by the second-mode instability, the crossflow instability, and isolated roughness. The effects of bluntness and of wind-tunnel freestream disturbances are also to be examined.

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