Table 1 comparative analysis of SOTA techniques.

From: Machine learning assisted CFD optimization of fuel-staging natural gas burners for enhanced combustion efficiency and reduced NOx emissions

Research area

Techniques

Objectives

Results and findings

Low-NOx combustion technologies2

Experimental, analytical, and numerical

Minimize pollutant formation, reduce peak flame temperatures, promote complete fuel oxidation

Improved combustion efficiency, reduced emissions, and better understanding of pollutant formation mechanisms

Fuel-staging strategies5,21

Experimental and numerical (CFD)

Develop controlled and efficient combustion processes, reduce NOx emissions

Significant reductions in NOx emissions, improved combustion stability and efficiency

Folded flame patterns7,22

Experimental and numerical (Cfd)

Improve combustion stability and efficiency, reduce NOx emissions

Enhanced combustion performance and lower NOx emissions in various systems

Computational fluid dynamics6,23

Numerical (CFD)

Analyze and optimize combustion systems, understand flow dynamics, heat transfer, and chemical reactions

Valuable insights into combustion system behavior and performance

Machine learning applications12,24

Numerical (ML, CFD), experimental

Predict combustion performance, pollutant emissions, and optimize system designs

Efficient exploration of design space, identification of optimal solutions, and reduced computational costs

Advanced burner designs14,25,26

Experimental, analytical, and numerical

Improve combustion performance, reduce pollutant emissions, and develop novel burner configurations

Novel burner designs with improved performance and lower emissions

Emissions regulations and compliance15,27

Regulatory and policy analysis

Establish emissions standards and guidelines, limit emissions of NOx and other pollutants

Driving the development and implementation of low-NOx technologies and combustion system optimizations

Environmental impact assessments and life cycle analysis16

EIA, LCA

Assess the overall environmental footprint of combustion technologies and systems

Guided development of more sustainable combustion technologies

Multi-objective optimization17

Genetic algorithms, particle swarm optimization, simulated annealing, Ml integration

Address conflicting objectives in combustion system optimization, identify Pareto-optimal solutions

Improved optimization efficiency and identification of optimal trade-offs between competing objectives

Uncertainty quantification and sensitivity analysis18

UQ, sensitivity analysis, CFD, ML

Assess the robustness of model predictions, identify key parameters driving system behavior

Better understanding of uncertainties, reliable identification of optimal solutions

Optimization of low-NOx strategy in folded flame pattern using fuel-staging natural gas burner

Computational fluid dynamics, machine learning-assisted design

Enhanced combustion efficiency, reduced NOx emissions, machine learning-driven optimization, energy savings, environmental impact

Innovative approach to combustion system design integrating CFD and machine learning, achieving optimal trade-offs between combustion efficiency and NOx emissions