19/03/2021
The Human Resources Strategy for Researchers

Experimental study of the injection of fluids at high pressure (supercritical) for a rocket engine type application.

This job offer has expired


  • ORGANISATION/COMPANY
    INSA Rouen Normandie
  • RESEARCH FIELD
    EngineeringAerospace engineering
    EngineeringMechanical engineering
  • RESEARCHER PROFILE
    First Stage Researcher (R1)
  • APPLICATION DEADLINE
    01/09/2021 00:00 - Europe/Brussels
  • LOCATION
    France › Saint Etienne du Rouvray
  • TYPE OF CONTRACT
    Other
  • JOB STATUS
    Full-time
  • HOURS PER WEEK
    35

OFFER DESCRIPTION

PHD Position.

The suggestion to use supercritical fluids is a century old. They have been used as solvents in reaction media or as fluids for propulsion. In the latter case, the tendency is to increase the pressure in the combustion chamber in order to increase the efficiency of the jet engines when using the new generation kerosene and thus considerably reduce the CO2 emissions and NOx production. As a result, the liquid fuel can be injected under supercritical conditions (or compressed liquid). Many energy systems involve a thermodynamic transition from a subcritical state to a supercritical state. The INSIDE project aims to study the impact of the behavior of the phases (subcritical and supercritical) on the mixture through innovative diagnostics coupled with numerical simulations. The CORIA laboratory and the CMAP of the École Polytechnique are associated in this project.

Experimental data for this type of injection regime remains scarce and / or poorly documented. The ANR REFINE (http://www.coria-cfd.fr/index.php/REFINE), completed in 2018, aimed to overcome this knowledge deficit by the experimental and numerical study of injection in diets sub, trans and supercritical of an ethane jet unassisted in helium in an enclosure at variable pressure and temperature. All of these results are available in N. Vallée's thesis defended at CORIA in 2018. During the REFINE project, it turned out that setting up high-pressure diagnostics was a challenge that required further investigation.

The CORIA phd offer proposed here is the continuation of the ANR REFINE. The goal is to perform a series of quantitative measurements (density, speed) of a supercritical jet. This is a real challenge because the development of a truly controlled experience in pressure and temperature is delicate. In addition, innovative diagnostics will be used for the first time in the context of supercritical fluids: Spontaneous Raman scattering and femtosecond double-pulse imaging. The development of these diagnostics will be a key point of the project. This study is therefore essential in understanding the disintegration of supercritical jets and will also make it possible to provide the scientific community with an exploitable experimental database for the validation of computer codes. A coaxial type injector is envisaged here in order to have a better control of the flow and to approach the final application of the rocket engine injectors. Post-processing codes using artificial intelligence (AI), thermodynamics and / or fluid mechanics may be used in order to deepen the knowledge of these very specific flows.

More Information

Offer Requirements

  • REQUIRED EDUCATION LEVEL
    Engineering: Master Degree or equivalent
  • REQUIRED LANGUAGES
    FRENCH: Good
    ENGLISH: Good

Skills/Qualifications

The candidate will have a Master 2 level diploma (Engineering School or University) in fluid mechanics, energy, aeronautics or chemical engineering. Experience in diagnostics, experiments, AI, DNS or LES type simulation, Fortran coding is appreciated as well as knowledge of thermodynamics or atomization / spray modeling. Excellent verbal and written communication skills in English and French. Rigor and autonomy are also appreciated.

Work location(s)
1 position(s) available at
INSA Rouen Normandie - CORIA
France
Saint Etienne du Rouvray
76801
Avenue de l'Université

EURAXESS offer ID: 617885

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