Improvement of Processes in Combustion Chambers of Piston Engines Converted to Hydrogen

This book is devoted to the improvement of thermophysical processes of hydrogen injection, formation of a hydrogen-air mixture, combustion, flame propagation, and heat exchange with the walls of the combustion chamber occurring in serial diesel and gasoline engines converted to hydrogen. It presents research where “process improvement” refers to organization that would minimize nitrogen oxide emissions and heat losses with the walls and reduce thermal loads on the combustion chamber surfaces and the heat-stressed state of the main parts (piston, cylinder head and liner). Improvement is mainly achieved through the use of optimal values of engine parameters, such as design (combustion chamber shape; hydrogen injector design; intensity of vortex motion generated in the intake channel, etc.) and adjustable (hydrogen-air mixture composition; injection moment, duration and pressure; degree of exhaust gas recirculation, etc.) parameters. These are determined based on the results of numerical and full-scale experiments on the hydrogen engines under study. At the end of each part of the book, practical recommendations are given for converting serial gasoline and diesel engines to hydrogen. Addresses the main technical problems encountered converting traditional serial diesel and gasoline engines to hydrogen; Presents numeric models and experiments on thermophysical processes in serial Diesel/Otto engines converted to hydrogen; Details the features of thermophysical processes in the combustion chambers of hydrogen engines.