首页|Effects of the global equivalence ratio and nozzle diameter on combustion behaviors of lean premixed hydrogen-air turbulent jet ignition with hydrogen super-rich pre-chamber
Effects of the global equivalence ratio and nozzle diameter on combustion behaviors of lean premixed hydrogen-air turbulent jet ignition with hydrogen super-rich pre-chamber
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In this study, lean hydrogen-air mixtures were ignited in a combustor by a turbulent jet of super-rich hydrogen combustion gas from an activepre-chamber under globally lean conditions. A rapid compression machine was used to simulate the compression process of spark ignition engines.During the combustion experiments, mixtures in the pre-chamber and the main one was separated by a plastic film with different equivalenceratios. Near-infrared (NIR) emissions of water vapor and OH* chemiluminescence images were captured with high-speed cameras, and theignition and injection behaviors of the pre-chamber jet were observed. Results indicate that the nozzle diameter and pre-chamber equivalence ratiosignificantly had influences on the initial pressure rise, the combustion duration, and the peak pressure of the combustion in the main chamber.
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