Investigation of Fuel Nozzle Performance on Direct Injection Diesel Engines Using Computational Simulation

Abstract

Single-cylinder model simulation designed for four-stroke direct-injection diesel engines requires advanced analysis of the performance effect of the direct-injection diesel engine model, focusing on fuel nozzle multi-hole geometries. The computational model simulation development used the commercial computational fluid dynamics of GT-POWER 6.2 software, specially developed for internal combustion engine performance simulation.  The research concentrated on the one-dimensional model and focused on the variation of fuel nozzle multi-hole geometries developed from all of the engine components' size measurements of the original selected diesel engine. All the measurement data is inputted to the window engines component menu to run input data in the model. Results of the diesel engine fuel nozzle multi holes geometries model simulation running are in GT-POST. The model performance is shown in the engine cylinder and engine crank-train on the software window output. The performance analysis effect of the model investigated the fuel in-cylinder engine, indicating the model's specific fuel consumption, torque, and power. The simulation showed that the seven-hole nozzle provided the best burning for fuel in-cylinder burn, and the five-hole nozzle provided the best for indicated power, indicated torque, and indicated specific fuel consumption at any different engine speed in the simulation.