CNRS, at the Institut Pprime on the Futuroscope site, within the framework of a collaboration with Les Voies Navigables de France (VNF) and the Laboratoire de Mathématiques et Applications (LMA) in Poitiers, is recruiting a Post-Doctoral theoretician to study navigation in a confined environment. The challenge is to renew theoretical work on the effects of hydraulic and undulatory confinement for a river boat interacting with the structure (typically a trapezoidal channel).
Within the Curiosity research team (https://pprime.fr/la-recherche/fluides-thermique- combustion/curiosity/), for example, the partners wish to determine the critical speed of the boat corresponding to the appearance of hydraulic confinement phenomena which result in a return current around the hull of the ship, a variation in the level of the water body, a modification of the resistance the progress of the ship according to the geometry of the waterway, its roughness of the slope or the presence of a current, the naval architecture characteristics of the ship such as the block coefficient or the friction on the hull.
Expected date of employment : 1st October 2023
Applicants must apply on the site : https://emploi.cnrs.fr/
=> https://emploi.cnrs.fr/Offres/CDD/UPR3346-NADMAA-085/Default.aspx?lang=FR
Début de publication : 14/06/2023 09:00
Date de fin de publication : 05/07/2023 23:59
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CDD Technicien-ne électronicien-ne - 12 Mois - Catégorie B
POST-DOC (M/F) - Control by Machine Learning of bluff body wakes
At the CNRS-Laboratory PPRIME, based at the Futuroscope, this post-doctorate position is part of the French ANR COWAVE program between the laboratories PRISME in Orleans, Pprime in Poitiers, LHEEA in Nantes and the PSA automotive industry. This Post-Doc position concerns the Pprime contribution to the COWAVE project which aims the experimental exploration of closed-loop wake control strategies with mobile flaps in a water tunnel facility. Three-dimensional bluff-body wakes generate pressure drag and side forces and thus contribute significantly to the fuel consumption and pollutant emission of road vehicles. Despite this crucial impact and the numerous attempts to reduce harmful environmental effect of bluff body wakes by flow control it is still unclear what is the most efficient control strategy! In this context, the ANR project COWAVE addresses two fundamental aspects of wake control: - First, what kind of actuators are most efficient? While most closed-loop control strategies use viscous entrainment effects to actuate the shear layers in the wake, the exploitation of pressure forces produced by mobile deflectors could be an interesting alternative to be tested. - Second, for the implementation of closed-loop control, we want to test if control strategies obtained by machine learning techniques allow to obtain better efficiency and robustness than the more classical model-based approaches? The proposed Post-Doc position is part of the French ANR COWAVE program between the laboratories PRISME in Orleans, Pprime in Poitiers, LHEEA in Nantes and the PSA automotive industry. This Post-Doc position concerns the Pprime contribution to the COWAVE project which aims the experimental exploration of closed-loop wake control strategies with mobile flaps in a water tunnel facility. APPLY Follow link / Application Deadline : 12 March 2021 https://bit.ly/3qDG6Ml