Numerical investigation of liquid jet breakup and droplet statistics with comparison to X-ray radiography

Luis Bravo, Dokyun Kim, Frank E. Ham, Katarzyna E. Matusik, Daniel J. Duke, Alan L Kastengren, Andrew B. Swantek, Christopher F Powell

Research output: Chapter in Book/Report/Conference proceedingConference PaperResearchpeer-review

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 languageEnglish
Title of host publication52nd AIAA/SAE/ASEE Joint Propulsion Conference, 2016
Subtitle of host publicationJuly 25-27, 2016, Salt Lake City, UT
EditorsVineet Ahuja
Place of PublicationReston VA USA
PublisherAmerican Institute of Aeronautics and Astronautics
Pages6501-6512
Number of pages12
ISBN (Print)9781624104060, 9781510833111
DOIs
Publication statusPublished - 2016
Externally publishedYes
EventAIAA/SAE/ASEE Joint Propulsion Conference 2016 - Salt Lake City, United States of America
Duration: 25 Jul 201627 Jul 2016
Conference number: 52nd
https://arc.aiaa.org/doi/book/10.2514/MJPC16

Conference

ConferenceAIAA/SAE/ASEE Joint Propulsion Conference 2016
CountryUnited States of America
CitySalt Lake City
Period25/07/1627/07/16
OtherHeld at the AIAA Propulsion and Energy Forum 2016

The American Institute of Aeronautics and Astronautics (AIAA)
Internet address

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