Optimizing Low-Load Performance: Investigating Diesel-Hydrogen Dual Fuel Engine Combustion Traits

The current study looked at hydrogen as a fuel for diesel engines running at low load. Because hydrogen has a greater auto ignition temperature than diesel fuel, it cannot be utilized directly in a diesel engine. An alternative method for enrichment or induction is hydrogen. To investigate the combustion characteristics of this dual fuel engine, diesel fuel was converted to hydrogen in a single-cylinder research engine. In order for hydrogen to access the combustion chamber, it had to be added to the intake manifold using a mixer. The engine ran continuously at 2000 rpm with a 10 Nm load. Hydrogen was introduced at flow rates of 21.4, 36.2, and 49.6 liters per minute. Cylinder pressure, recommended efficiency, and specific energy consumption were investigated. At this modest load, the hydrogen enrichment lowered the cylinder's peak pressure. Slower reaction progress variable and reaction combustion rate were shown via open Modelica modeling.