Sensitivity analysis on the operational parameters affecting combustion markers in MILD regime

Details

Supervisors

Contino, Francesco

Faculty

Ecole polytechnique de Louvain

Degree label

Master [120] : ingénieur civil mécanicien, à finalité spécialisée

Abstract

In order to reach its pollutant emissions reduction targets, the European Union implemented the NextMGT program. It aims at developing the micro gas-turbine technology under different aspects, among which the combustion. Moderate or Intense Low oxygen Dilution (MILD) combustion stands out as a promising flexible and low-pollutant technology, while achieving high efficiencies. However, a Damköhler number of 1 characterises the regime and hinders its development. At time of writing of this master thesis, there is no aggregated method to reach MILD conditions. The present work aims at improving the understanding of operational parameters effects on combustion markers, to better capture the physical process. A CFD simulation replicating the combustion in a simplified Delft Jet in Hot Coflow has been adapted to carry out a non-intrusive Polynomial Chaos Expansion (PCE). Then, the simulation inputs of interests were selected and their stochastic space defined. However, the simulation has shown limitations and the PCE analysis had to be dropped. Nonetheless, the effects of the main oxidiser concentration were measured. The results underline the flexibility of MILD combustion.