HydrogEn combuSTion In Aero engines

Rezultaty

A public website will be created to allow dissemination and communication activities to be performed towards the general public

Design space exploration and multiple swirler concepts definition

The activity is focused on the design of different swirlers aiming the reducing of Nox emissions and ensuring safety margins without flashback and autoignition by leveraging the background of the partners involved, both industrial and academic, and using additive manufacturing as an enabler for the manufacturing of such components, looking at both conventional/unconventional mixer configurations ( RQL, lean mixers) . The swirler and fuel nozzle designs will be numerically explored considering the level of interaction with other combustor aerodynamic features (quenching module, cooling,..) in order to down selected them for Low TRL test on Single sector rigs (TRL2-3).

Benchmark computations

This deliverable includes preliminary comparative analysis of existing benchmark problems for nonreactive and reactive conditions characterized by a flowgeometry complexity similar to the present model combustion chamber

Completed design, fabrication, and commissioning of premixed, partially premixed, and non-premixed LSB.

This deliverable details the design fabrication and delivering of LSB test bench for different kinds of configurations premixed partially premixed and non premixed flames

Experimental data set from lab scale test campaign

A lab scale experiment will be devised and performed to characterise H2air flame at atmospheric conditions Advanced diagnostics will be applied to derive a data set for validating CFD methods

Conception of the injection systems and the high-pressure burner

An adaptation of an available high-pressure burner will be performed for implementing the new injection systems. The injection systems will be assimilated to alternative-wedge struts which can generate streamwise vortices for fuel/air mixing enhancement. Several kinds of architectures will be examined to study the effects of the streamwise vortex arrangements such as vortex strength, counter or co-rotating vortex arrangement on the mixing characteristics as well as the combustion efficiency. For the experiments, each strut could generate several vortices (up to 8) in a spanwise row configuration. Gaseous Hydrogen will be injected parallel to the mainstream direction directly in the core region of each streamwise vortex through a series of small orifices. The injection system will be mounted in a water-steel pressure housing with four optical accesses. Pressure will be adjusted between 0.1 to 0.4 MPa.

LES-based turbulent combustion models for high-pressure H2 combustion

The subtask is devoted to the evaluation of LES methodologies for H2 combustion simulation up to high pressure (P=30 bars) with a focus also on rich burn conditions (equivalence ratio Φ between 1.5 and 2.5). Models considered are more especially the TFM and the FGM with presumed PDF closure.

Emission index of several flames of interest

The deliverable reports quantitative measurements of NO in several hydrogen-air flames by usig advanced diagnostics. These diagnostics will be used to analyse the NOx formation processes.

Data management plan

Plan detailing data management procedures to be followed by all partners relevance of data with and limitation to the research purposes of the project description of the technical and organisational measures implemented to safeguard the rights and freedoms of the data subjectsresearch participants Linked with all projects tasks but especially task 42

Hydrogen injector design definition

Adaptation of a RQL injector for H2 an existing combustor (developed for kerosene) and optimized for H2 combustion. The focus on the CFD based studies will be on NOx emissions and stability. The study will also focus on lean burn systems without dilution ports. It is expected that due to the very short ignition delays times, it is not possible to premix H2 with air, so concepts have to be developed where the mixing of fuel and air takes place within the combustion chamber. A possible concept is FLOX, where air and fuel are injected with high velocity leading to high mixing rates and the high velocities to prevent immediate combustion.

Set-up of online community engagement tool

A dedicated sharepoint (or equivalent) area will be set up so that members of the HESTIA advisory Board will have access to documentation and data specifically tailored to them.

Rezultaty

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