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1D Modeling of the outwardly opening direct injection for internal combustion engines operating with gaseous and liquid fuels STEMS CNR
- Format:
- Book
- Conference/Event
- Author/Creator:
- Sementa, Paolo, author.
- Conference Name:
- 15th International Conference on Engines & Vehicles (2021-09-12 : Capri, Italy)
- Language:
- English
- Physical Description:
- 1 online resource cm
- Place of Publication:
- Warrendale, PA SAE International 2021
- Summary:
- The in-cylinder direct injection of natural gas can be a further step towards cleaner and more efficient internal combustion engines. However, the injector design and its characterization, both experimental and numerical simulation is very complicated.In this work, a methane jet comes from an outward-opening poppet-valve injector has been simulated by one-dimensional simplified numerical model. Previous experimental investigation put in evidence three main jet regions: 1) near field region where the complex gas-dynamic structure that characterizes an under-expanded free jet; 2) transition region characterized by intense mixing; 3) far field region where the jet transitions to a fully developed subsonic turbulent jet. The aim of the work is to simulate, with a one-dimensional model, a jet of methane characterized by complex fluid-dynamic structures without invoking complex numerical models. In particular, in this work, the numerical one-dimensional model of Musculus and Kattke is used to simulate the far field region that represents the most of jet length. In this work, the Musculus and kattke's model has been modified to introduce the energy equation. The model solves mass, momentum and energy transport equations along the jet axis. The Comparison between the numerical and experimental results, obtained using Schlieren technique, arises that the far field region is characterized by incompressible flow. Although, the jet flow is strongly turbulent, it can be characterized on average, with simple balance equations, giving a relevant results
- Notes:
- Vendor supplied data
- Publisher Number:
- 2021-24-0006
- Access Restriction:
- Restricted for use by site license
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