N/A
PhD offer
Full-time
5-35k€ gross salary / YEAR
Master's degree
Between 0 and 2 years
Doctoral student
07/09/2026
Low Earth Orbit (LEO) satellite constellations — such as Starlink, OneWeb, Kuiper, and Telesat Lightspeed — are rapidly becoming a cornerstone of next-generation communication infrastructures and future 6G networks.
With thousands of satellites orbiting at altitudes between 500 and 2000 km, these systems offer unprecedented global coverage combined with significantly lower latency than traditional geostationary systems. The emergence of LEO constellations opens transformative opportunities for time-sensitive applications. These applications demand deterministic end-to-end delay guarantees — strict, provable upper bounds on latency — rather than best-effort performance. However, providing such guarantees in LEO constellations remains an open and largely unsolved problem.
Preliminary research conducted at ISAE-SUPAERO has demonstrated that Network Calculus (NC), a mathematical framework for computing worst-case performance bounds in communication networks, can be successfully adapted to LEO satellite constellations. This PhD aims to develop a comprehensive analytical and algorithmic framework for deterministic QoS guarantees in dynamic LEO satellite constellations within a collaborative project PEPR FRONTIER funded by the ANR with many partners like CNRS, Sorbonne Université et mines-Telecom Bretagne.
Research Engineer – Structural Dynamics
N/A
Fixed-term contract
Full-time
PhD
31/12/2026
The engineer will contribute to all work packages within the CRÉSAT project, playing a central role in experimental developments. Their work will be carried out in close collaboration with a postdoctoral researcher recruited for the project at the École de l’Air et de l’Espace (EAE).
Their tasks will focus primarily on the preliminary design and development of several deployable-structure prototypes, with increasing fidelity, ranging from beam-type structures to truss-type architectures. Particular attention will be paid to replicating operational conditions, notably in microgravity environments and under shock-type loads. The dynamic characterisation of the various systems will provide input for the project’s numerical models.
The project is based on an innovative approach combining hybrid control and a wave-based representation of structural behaviour. Based on the phenomena of wave propagation, reflection and absorption, this approach notably introduces the concept of anechoic termination, which aims to limit unwanted reflections and confine vibrational energy. The hybrid control system will therefore aim to implement this type of termination experimentally. In this context, the engineer will play a key role in the experimental validation and development of the control strategy, initially passive and subsequently hybrid. In particular, he or she will be involved in the design of control laws and their real-time implementation using data acquisition systems (such as dSPACE).
Finally, particular attention will be paid to identifying and accounting for any non-linear phenomena, notably those induced by the junctions between the various structural elements.
Control of wingtip vortices via inhomogeneous jet injection
N/A
Full-time
3400€ / MONTH
PhD
Between 2 and 5 years
Post-doctoral research assistant
01/09/2026
This experimental project aims to investigate the control of wingtip vortices through the injection of variable-density jets into the vortex core, with the objective of accelerating their destabilisation and decay. This approach is motivated by the significant applied relevance of such vortices, which contribute to the formation of condensation trails in aircraft wakes and, consequently, to aviation-induced radiative forcing. The primary diagnostic technique employed is time-resolved Particle Image Velocimetry (PIV), enabling precise quantification of the vortex dynamical response to the induced perturbations. The project builds upon recent numerical findings from the research group, which demonstrated considerable transient growth potential in variable-density vortices, as well as preliminary experimental measurements already successfully carried out on the department’s test bench.
Towards a more operation-centric approach to aircraft design
PhD offer
Full-time
2153€ net pay before income tax /month
Between 0 and 2 years
Doctoral student
30/06/2026
The thesis is proposed in the framework of the EA²GLE Graduate school related to the electrification of Aircraft and Automobiles and is co-funded by the AMI CMA PEGASE and the Occitanie Region.
The research activities aim to develop design methodologies for low-carbon aviation by addressing the challenges of incorporating operational constraints, failure scenarios, and multi-mission requirements into the optimisation process. The developed methodologies will be applied to the design of architectures of more electric aircraft in the category CS23.
The outcomes of the thesis will enable aircraft manufacturers to design safer, more efficient and more environmentally sustainable aircraft, while reducing design risks, development costs, and time to market.
This thesis will be organized based on several well-defined research axes which will structure the project:
- Axis 1 (Month 1 to 6): this axis will focus on proposing a ConOps for aircraft in the General Aviation segment (which will be the scope of this thesis) and more specifically for larger aircraft specified under CS-23. This will be done thanks to a review of current aircraft in this category, not only including missions but also geographical profiles, and will also include a review of design constraints for propulsive and non-propulsive systems.
- Axis 2 (Month 7 to16): this axis will aim at improving the models in the FAST-OAD-CS23-HE framework which is developed to assess Hybrid Electric aircraft of category CS23. It will include the proposition of models for the sizing of non-propulsive systems on General Aviation aircraft and their impact on the sizing of propulsive systems (which therefore requires higher fidelity modeling on thermal machines). Additional work on the impacts of usage of thermal machines and batteries on their respective lifespan and performances is also expected.
- Axis 3 (Month 17 to 24): this axis will focus on the methodological aspect of deploying multi- mission optimization in an OAD framework. In particular, tradeoffs between different objective functions such as costs or environmental impacts will be investigated. The use of a simplified test case is proposed for this axis.
- Axis 4 (Month 25 to 30): this axis will further develop the work done in the previous months with a specific application to the TBM900 family and will investigate the possibility and viability of electrifying propulsive and non-propulsive functions.
- Month 31 to 36 will be dedicated to the redaction of the manuscript and preparation of the defense.
This work is expected to lead to the publication of at least 1 scientific article in a top-tier journal and at least two international conferences.
Cavitation in cryogenic fluids in microgravity conditions
N/A
PhD offer
Full-time
2100€ / month
Master's degree
Between 0 and 2 years
Doctoral student
01/03/2026
A PhD position is open in the Space Advanced Concepts Laboratory in collaboration with IMFT (institute de mécaniques des fluides des Toulouse)
Supervisors:
- Annafederica Urbano, professor, ISA-SUPAERO
- Sébastien Tanguy, professor, Université Paul Sabatier, IMFT
Technological context and scientific questions
During depressurization for propellant preconditioning (and cooling) prior to engine ignition or propellant transfer (in the context of space depots), bubbles can form and grow due to cavitation. This is a problem due to vapour accumulation under microgravity conditions and the impact on wall heat transfer. More generally, cavitation, under conditions where phase change predominates, is important for many applications (including nuclear power plants) and raises many questions that are not understood at the small scale.
This justifies the development of the SCREAMH2 microgravity wall cavitation experiment (currently in phase A/B development under an ESA contract), in which ISAE-SUPAERO is participating as part of the scientific team.
There are several scientific open questions regarding pool cavitation. It is unclear how the contact line phenomena (nano-region, wall roughness, cavity shape…), the level and dynamics of depressurization, and the nature of the fluid (pure or in the presence of non-condensable gas) impact the growth of these bubbles and the associated wall heat flux.
This thesis project aims to answer these questions by developing numerical models capable of accurately simulating pool cavitation, in parallel with the development of the SCREAMH2 experiment. The results will serve, on the one hand, as support for the experiment and, on the other hand, for its extension, particularly to configurations with multiple bubbles and in the presence of non-condensable gases.
Background
The present project is a continuation of the team’s recent work on the development of a solver for the direct numerical simulation of two-phase flows with phase change. The originality of the solver, based on a semi-implicit compressible projection method, lies in its thermodynamic consistency, which allows it to describe liquid, vapor, and saturation conditions at the interface for a generic fluid.
The solver has recently been extended to phase change in the presence of a contact line (solid, vapor, liquid) and validated for the simulation of nucleate boiling and pool cavitation. It has thus enabled parametric studies and model developments for bubble cavitation in microgravity at the wall. The models will be extended and generalized in this project.
This project aims to further develop the numerical solver and to use it to answer the scientific questions raised.
- Numerical development of the immersed boundary method [5] to include conjugate heat transfer and contact lines. After validation on basic test cases, configurations with complex geometries will need to be addressed. Initially, the simulation of CH4 pool cavitation used for validation in [4] will be reconsidered with the complex geometry (cylindrical support and cavity for the bubble).
- Incondensable gas. The solver will be extended to account for the presence of multi-species vapor and incondensable gases adsorption in the liquid while ensuring thermodynamic consistency at the interface. A surface tension model dependent on local composition will be developed, and the jump conditions will be adapted to take thermo-capillary effects into account. The model will need to be validated for simulation in the presence of Marangoni currents (using existing experimental data).
- Pool cavitation in micro-gravity. Several objectives will be pursued. The first will be to support the SCREAM H2 project with detailed numerical simulations. The second will be to extend the study of pool cavitation to many fluids, considering non-condensable gases and various geometric configurations. In particular, the phase change models developed in [4] will be extended and used to simulate multi-bubble configurations, the interaction between bubbles and their impact on wall heat transfer in microgravity.
Impact
While this project focuses on pool cavitation in microgravity, it is important to note that the developments envisaged are also intended to simulate and study other phenomena involving phase change in compressible flows in the presence of contact lines. These include 1) sloshing in tanks and 2) hydrodynamic cavitation with the development of cavitation pockets. It is planned to study such configurations towards the end of the thesis project, depending on how the project progresses.
Work environment
The PhD will be funded by CNES and will be hosted in the Space Advanced Concepts Laboratory at ISAE Supaero in collaboration with IMFT.
