Browse Publications Technical Papers 2008-01-0939

Large Eddy Simulation of Direct Injection Processes for Hydrogen and LTC Engine Applications 2008-01-0939

Direct injection (DI) has proven to be a promising option in Diesel and low temperature combustion engines. In conventional Diesel and homogeneous charge compression ignition (HCCI) applications, DI lowers soot and NOx production and improves fuel economy. In hydrogen fueled engines, DI provides the appropriate energy density required for high efficiency and low NOx emissions. To realize the full benefit of DI, however, the effect of various injection parameters, such as injection timing, duration, pressure, and dilution, must be investigated and optimized under a range of engine operating conditions. In this work, we have developed a model for high-fidelity calculations of DI processes using the Large Eddy Simulation (LES) technique and an advanced property evaluation scheme. Calculations were performed using an idealized domain to establish a baseline level of validation. The theoretical-numerical framework combines a general treatment of the governing conservation and state equations with state-of-the-art numerical algorithms and massively-parallel programming paradigms. This software enables both the canonical cases described here and in-cylinder calculations. Here we focus on high-pressure multi-port gas injectors designed for application in hydrogen-fueled IC-engines. This study was conducted in support of a larger effort to perform detailed in-cylinder LES calculations of companion optical engine experiments.


Subscribers can view annotate, and download all of SAE's content. Learn More »


Members save up to 17% off list price.
Login to see discount.
Special Offer: Download multiple Technical Papers each year? TechSelect is a cost-effective subscription option to select and download 12-100 full-text Technical Papers per year. Find more information here.
We also recommend:

Model Predictive Combustion Control Implementation Using Parallel Computation on an FPGA


View Details


Diesel Spray Characterization at Ultra-High Injection Pressure of DENSO 250 MPa Common Rail Fuel Injection System


View Details


Application of Micro-Genetic Algorithms for the Optimization of Injection Strategies in a Heavy-Duty Diesel Engine


View Details