Numerical Study of Turbulent Mixing with or without Chemical Reactions in Various Geometrical Configurations
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Date
2023
Authors
Abdelbasset LACHRAF
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Abstract
In recent years, the pursuit of miniaturization has fueled the development of micro-combustion-based power
generators. Among these, the Micro-Thermophotovoltaic (MTPV) system has emerged as a promising
technology, converting radiant heat from micro-combustors into electricity using photovoltaic cells.
Enhancing the performance of micro-combustors is crucial for achieving fuel efficiency, material
optimization, and cost reduction. This doctoral research addresses the need for innovative solutions to
enhance micro-combustor performance. It focuses on the numerical investigation of a novel microcombustor
design featuring four pairs of equidistant angled ribs on the inner wall of the downstream
channel. The study delves into the flow dynamics, combustion behavior, and thermal performance of this
new configuration. The findings reveal significant improvements in wall temperature levels upon
introducing the angled ribs. Moreover, increasing the rib heights enhances thermal performance
considerably. The formation of recirculation zones around the ribs facilitates ignition, resulting in more
stable and continuous flames. The proposed micro-combustor configuration demonstrates superior thermal
characteristics, as evidenced by mean weighted average and non-uniformity index parameters. This
research not only explores the potential of rib geometries for micro-combustor enhancement but also
contributes to the development of more efficient and sustainable energy generation technologies. The study
addresses existing research gaps, particularly in the context of ribs as wall projections, and emphasizes the
importance of an integrative analysis approach encompassing flow dynamics, combustion, and thermal
challenges. The research aims to bridge these gaps and advance the field of micro-combustion, offering
valuable insights for future innovations in sustainable power generation.