European Symposium on Laminar-Turbulent Transition in Hypersonic Regime

Rescheduled 20-22 September 2021 – Bordeaux, France

(Initially 25-27 May 2021 – Update in progress…)

The symposium


The laminar-to-turbulent transition is a primordial input for the design and trajectory assessment of hypersonic objects:

  • the transition at hypersonic speeds causes large changes in heat transfer, skin friction and boundary-layer separation.
  • the aerodynamic lift and drag, the stability and control of the object as well as the thermal protection system are directly affected by the state of the boundary-layer.

But understanding how and where transition occurs on a given configuration during re-entry or high-speed flight is one of the long-standing problems in aerodynamics.

The symposium aims to provide the community with most up to date answers to this issue.


The objectives of the symposium are the following:

  • gather people working or interested in boundary layer transition for hypersonic applications: experts, aerospace engineers as well as students
  • exchange about the current state of the art from the experimental point of view, the numerical side as well as wind tunnel measurements and analyzes
  • identify the best practices to study hypersonic transition


Topics to be covered :

  • Challenges in reentry and hypersonic system design raised by laminar/turbulent transition
  • Numerical and experimental methods for laminar/turbulent transition analysis in hypersonic regime
  • Current transition studies in hypersonic regime
  • Ground tests, including Hypersonic Quiet Tunnels
  • Ground tests instrumentation and analysis


To achieve this goal, the symposium will propose expert talks, presentation sessions and poster sessions in order to provide an easy-exchange conference.

Preliminary program

(edited 20 September 2020)

The preliminary program is outlined below.

We are particularly thankfull to Pr SCHNEIDER of Purdue University who accepted to make the Tuesday opening talk on hypersonic transition, and the Thursday review on hypersonic quiet tunnels.

* Update available *

******* soon ********

Day 1

Experts and experienced professional talks

Day 2

Expert and experienced professional talks

Presentations and posters about current activities

Day 3

Expert and experienced professional talks

Presentations and posters about current activities


from beginning of January 2021

The COVID-19 epidemy broke out before we were ready to open the online registration. We have now to wait until the end of this dreadly crisis before we resume the registrations.

As the place hosting the symposium (see below) limits the attendence to approximately 70 persons,  we wish to offer you the opportunity to pre-register as soon as possible.

We thus advise you to contact us early  here and leave your name, e-mail address and employer or profession.

We will inform you of the official registration opening as soon as it occurs.

Registration fee is 200€ per person for the full symposium, and includes attendence to all sessions, pauses, lunches and tuesday evening dinner.

Payment will only be required when official registration opens

Symposium venue

The symposium will be held in the meeting rooms situated on roof top of Mercure Cité du Vin hotel. The hotel is in the heart of Bordeaux, multi-centuries old city in the region of world famous wines, along the Garonne river.

Many accomodations are available close to the symposium and in the Mercure hotel itself.

Traveling in Bordeaux is very easy with efficient public transportation system.

Bordeaux offers many touristic areas : you may will to spend some days to discover them !

Organizing committee



  • R. BUR (ONERA)






  • F. PINNA (VKI)

  • P. TRAN (ArianeGroup)