Abstract
In direct injection engines, the jet primary and secondary breakup processes have a significant influence on the fuel/air mixture formation and drop-size distribution directly affecting the fuel conversion efficiency and combustion characteristics. In this work the disintegration process of turbulent liquid jets from a realistic diesel injector issuing into a still environment is investigated numerically using a coupled liquid/gas interface capturing technique and a high-fidelity DNS/LES approach. This study is aimed at assessing the influence of NJFCP aviation jet fuel mixtures on the disintegration and droplet-size spray characteristics at simulated diesel operating conditions. For this purpose, an unstructured unsplit Volume-of-Fluid method is employed in conjunction with a realistic diesel injector geometry to simulate the pulsed jet disintegration and breakup process. Flow and droplet PDF statistics are extracted to demonstrate the impact of physical properties (A2, C3 fuel) on the mixing behavior and droplet distribution. The simulations are compared against X-ray radiography volume fraction measurements from Argonne National Laboratory and also serve as numerical benchmarks for calibration of lower fidelity models.
Original language | English |
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Title of host publication | 52nd AIAA/SAE/ASEE Joint Propulsion Conference, 2016 |
Subtitle of host publication | July 25-27, 2016, Salt Lake City, UT |
Editors | Vineet Ahuja |
Place of Publication | Reston VA USA |
Publisher | American Institute of Aeronautics and Astronautics |
Pages | 6501-6512 |
Number of pages | 12 |
ISBN (Print) | 9781624104060, 9781510833111 |
DOIs | |
Publication status | Published - 2016 |
Externally published | Yes |
Event | AIAA/SAE/ASEE Joint Propulsion Conference 2016 - Salt Lake City, United States of America Duration: 25 Jul 2016 → 27 Jul 2016 Conference number: 52nd https://arc.aiaa.org/doi/book/10.2514/MJPC16 |
Conference
Conference | AIAA/SAE/ASEE Joint Propulsion Conference 2016 |
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Country/Territory | United States of America |
City | Salt Lake City |
Period | 25/07/16 → 27/07/16 |
Other | Held at the AIAA Propulsion and Energy Forum 2016 The American Institute of Aeronautics and Astronautics (AIAA) |
Internet address |