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Physics of Turbulent Jet Ignition

Mechanisms and Dynamics of Ultra-lean Combustion

Sayan Biswas

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Springer International Publishing img Link Publisher

Naturwissenschaften, Medizin, Informatik, Technik / Luft- und Raumfahrttechnik

Beschreibung

This book focuses on developing strategies for ultra-lean combustion of natural gas and hydrogen, and contributes to the research on extending the lean flammability limit of hydrogen and air using a hot supersonic jet. The author addresses experimental methods, data analysis techniques, and results throughout each chapter and:
  • Explains the fundamental mechanisms behind turbulent hot jet ignition using non-dimensional analysis
  • Explores ignition characteristics by impinging hot jet and multiple jets in relation to better controllability and lean combustion
  • Explores how different instability modes interact with the acoustic modes of the combustion chamber.
This book provides a potential answer to some of the issues that arise from lean engine operation, such as poor ignition, engine misfire, cycle-to-cycle variability, combustion instability, reduction in efficiency, and an increase in unburned hydrocarbon emissions. This thesis was submitted to and approved by Purdue University.

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Schlagwörter

Natural gas and hydrogen, Modeling of combustion instability, Turbulence modeling, PIV imaging, Emission regulation, Flame propagation process in the pre-chamber, Greenhouse emissions, Supersonic nozzle designs, Radiation intensity, Data processing parameters, Infrared imaging, Lean flammability limit and ignition delay, High-speed Schlieren and shadowgraph imaging