Preliminary Assessment of Hydrogen Direct Injection Potentials and Challenges through a Joint Experimental and Numerical Characterization of High-Pressure Gas Jets 2022-24-0014
The interest towards hydrogen fueling in internal combustion engines (ICEs) is rapidly growing, due to its potential impact on the reduction of the carbon footprint of the road transportation sector in a short-term scenario. While the conversion of the existing fleet to a battery-electric counterpart is highly debated in terms of both technical feasibility and life-cycle-based environmental impact, automotive researchers and technicians are exploring other solutions to reduce, if not to nullify, the carbon footprint of the existing ICE fleet. Indeed, ICE conversion to “green” fuels is seen as a promising short-term solution which does not require massive changes in powertrain production and end-of-life waste management. To better evaluate potentials and challenges of hydrogen fueling, a clear understanding of fuel injection and mixture formation prior to combustion is mandatory. The paper reports a preliminary experimental and numerical characterization of high-pressure gas jets exiting from a single-hole injector derived from a GDI unit and purposely re-designed for gaseous fuel operations. A wide range of operating conditions is explored to perform a sensitivity analysis to key-factors such as injection pressure and temperature and ambient backpressure. Multiple state-of-the-art experimental techniques are adopted to characterize the gas jets and to support the numerical sensitivity analyses to key modelling aspects such as grid density and turbulence modelling.
Citation: Fontanesi, S., Postrioti, L., Magnani, M., Martino, M. et al., "Preliminary Assessment of Hydrogen Direct Injection Potentials and Challenges through a Joint Experimental and Numerical Characterization of High-Pressure Gas Jets," SAE Technical Paper 2022-24-0014, 2022, https://doi.org/10.4271/2022-24-0014. Download Citation
Author(s):
Stefano Fontanesi, Lucio Postrioti, Mauro Magnani, Manuel Martino, Gabriele Brizi, Giuseppe Cicalese
Affiliated:
Università di Modena e Reggio Emilia, Università degli Studi di Perugia, STSE SRL, R & D CFD SRL
Pages: 15
Event:
Conference on Sustainable Mobility
ISSN:
0148-7191
e-ISSN:
2688-3627
Related Topics:
Biofuels
Fuel injection
Combustion and combustion processes
Waste management
Wind tunnel tests
Fleets
Gases
Powertrains
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