PostDoc M/F - Synthesis of new efficient thermo-luminophore materials for temperature measurement in combustion

13 Feb 2024
Job Information

Organisation/Company

CNRS

Department

Laboratoire d'énergétique moléculaire et macroscopique, combustion

Research Field

Engineering
Chemistry
Physics

Researcher Profile

Recognised Researcher (R2)

Country

France

Application Deadline

4 Mar 2024 - 23:59 (UTC)

Type of Contract

Temporary

Job Status

Full-time

Hours Per Week

35

Offer Starting Date

1 Apr 2024

Is the job funded through the EU Research Framework Programme?

Not funded by an EU programme

Is the Job related to staff position within a Research Infrastructure?

No

Offer Description

Two laboratories EM2C and SPMS have thus joint their expertise respectively in combustion systems such as high pressure oxy-combustion chamber and in synthesis and characterization of pioneering materials to develop and finely characterized new temperature sensitive thermo-luminophore.
This expected future material will be finally used in subscale hydrogen-fueled rocket engine in which temperatures move from cryogenic temperature (20 K) to 2000 K. To this end a specific experiment has been conjointly designed that allows identifying the response of thermographic phosphors as a function of temperature, incident radiative flux, chemical environment and pressure.

1) Extend and improve the Full Spectrum Fitting method to pressure and chemical environment, a calibrated method recently develop by EM2C team to retrieve the temperature independently of the incident radiative flux.
2) Synthesize and characterize new thermo-luminophore for combustion application. In particular, commercial materials as well as newly formulated and synthesized thermos-luminophores will be characterized precisely as a function of temperature and surrounding atmosphere.
3) Applied the new thermo-luminophore in a real combustion chamber at high pressure.

Surface temperature knowledge is fundamental in energy converting systems and transfer processes such as turbines, rocket engines, nuclear reactors, or even glass melting furnaces. Their efficiencies and lifetime are strongly dependent of the wall temperatures which require accurate and highly resolved information.
Laser induced phosphorescence technique allows to measure these temperatures using rare-earth or transition metal doped ceramic materials, so-called thermo-luminophore.
Under laser irradiation the deposed phosphor on the interest surface emits a signal. This property is temperature-dependent and exploited to determine it. Concretely, the phosphorescence signals are shown to evolved temporally and spectrally with temperature, allowing to obtain a precise evaluation of the temperature through a preliminary calibration, since the phenomenon is measured using specially design optical probe. This technique displays many benefits since it is no invasive comparing to the traditional techniques (thermocouples, …) and allows a very high temporal and spatial resolution of temperature in the practical system. The current thermographic phosphors show a limited operation temperature-range and often cannot be used for temperatures higher than 1600K. They can also be affected by atmosphere composition.

The EM2C laboratory (CNRS/INSIS and Université Paris-Saclay/CentraleSupélec http://em2c.centralesupelec.fr/ ), through its high-level academic research on energy and combustion and its applied studies in partnership with leading companies and research centers in the fields of transport and energy, makes a significant contribution to the advancement of knowledge on these critical issues, both for the climate and the environment. To meet these challenges, the laboratory's research activities are organized around three main themes: Combustion, Non-equilibrium Plasmas, Transfer Physics, and a transversal action in Applied Mathematics. You will be included in the Combustion axis. The EM2C Laboratory has around 45 permanent staff (researchers, teacher-researchers & research support staff) and 35 PhD students, post-docs, trainees & visiting professors. The position is located in a sector covered by the Protection of Scientific and Technical Potential (PPST), and therefore requires, in accordance with regulations, that your arrival be authorized by the competent MESR authority.

Requirements

Research Field

Engineering

Education Level

PhD or equivalent

Research Field

Chemistry

Education Level

PhD or equivalent

Research Field

Physics

Education Level

PhD or equivalent

Languages

FRENCH

Level

Basic

Research Field

Engineering

Years of Research Experience

1 - 4

Research Field

Chemistry

Years of Research Experience

1 - 4

Research Field

Physics

Years of Research Experience

1 - 4

Additional Information
Eligibility criteria

A PhD in the fields of material synthesis and characterization or in applied physics (spectroscopy techniques, etc ) is required.
Additional knowledge in the field of data process and statistical analysis will be beneficial.

Website for additional job details

https://emploi.cnrs.fr/Offres/CDD/UPR288-CLEMIR-001/Default.aspx

Work Location(s)

Number of offers available

1

Company/Institute

Laboratoire d'énergétique moléculaire et macroscopique, combustion

Country

France

City

GIF SUR YVETTE

Geofield

Where to apply

Website

https://emploi.cnrs.fr/Candidat/Offre/UPR288-CLEMIR-001/Candidater.aspx

Contact

City

GIF SUR YVETTE

Website

http://em2c.centralesupelec.fr/

STATUS: EXPIRED