PhD in mechanical engineering: Experimental analysis of flame-wall interaction with reactive hydrogen/air flows – (F/M)
Offer DescriptionThe development of a hydrogen economy is seen as a key option for ensuring access to affordable, reliable, sustainable and modern energy (SDG 7). Nevertheless, major technological challenges currently prevent the implementation of hydrogen as a chemical energy carrier in energy systems. Among others, the higher specific energy density of hydrogen (~120 MJ/kg vs. 50 MJ/kg for methane) raises a technological challenge concerning the thermal management of combustion chamber walls, which have to withstand long periods (
10,000 hours) exposed to high temperatures (~2000 K) and severe oxidizing/corrosive reactive environments. It is then crucial to gain a detailed understanding of the primary physical processes of hydrogen-based reactive flows interacting with walls.The aim of this thesis is to understand the physical mechanisms involved when a reactive hydrogen-air flow interacts with a wall. The scientific strategy consists in implementing non- intrusive optical metrology in a generic configuration reproducing flame-wall interaction processes with or without an air film. The originality of the subject of this thesis is justified by the lack of experimental data with the use of near-wall hydrogen. The objectives of this thesis are as follows: * Develop and characterize a generic case of flame-wall interaction. An existing combustion bench (CENTOR) will be modified to generate a turbulent premixed flame over a wide range of equivalence ratios. This system will be characterized by establishing the stability diagram using global measurements (OH* chemiluminescence). An (existing) parietal air film generation system will also be studied to reproduce a cooling technology. Wall temperature measurements (laser-induced phosphorescence) will complete these stability diagrams with the inclusion of the thermal aspect.Detailed analysis of flame dynamics. An understanding of the behavior of flame dynamics in the vicinity of the wall will be carried out in order to shed light on the mechanisms by which nitrogen oxides (NOx) are formed. To this end, a number of operating points will be selected (action 1 above). Flow topology and flame structure measurements will be carried out jointly. A comparison between a solid wall and a wall equipped with an air film will illustrate the role of the air film.
Saint-Étienne, Loire – Rouvray, Eure
Sat, 23 Mar 2024 05:21:05 GMT
To help us track our recruitment effort, please indicate in your email/cover letter where (vacanciesineu.com) you saw this job posting.
Location: Bristol (BS20) - Avon, South West, United Kingdom Salary: Competitive Type: Permanent Main Industry:…
Job title: Electrical project manager Company: LeasingTeam Job description LeasingTeam Professional wspiera polskie i globalne…
Job title: Team Lead Equipment Project Management Company: Siemens Gamesa Renewable Energy Job description It…
Job title: Sales Development Representative for Belgium Company: Job description Brand ambassadorAre you enthusiastic, super…
Location: Farnborough (GU14) - Hampshire, South East, United Kingdom Salary: Competitive Type: Permanent Main Industry:…
Job title: SEN Teaching Assistant Company: Prospero Teaching Job description Job descriptionAre you an ambitious…