The internal flows of high pressure diesel injectors are simulated numerically in order to investigate the complex transient flow structures and the unsteady forces imparted to the injector needle that result. The gas-liquid two phase flow is modeled using a mixture schematic with the cavitation numerically modeled using the Zwart-Gerber-Belamri model. Both the k-ε model and the detached eddy simulation (DES) model are used and the numerical results are compared. Our study shows that the DES model is able to capture the important unsteady flow features missed by the k-ε model. Our simulation also shows that the injector geometry, specifically the gain orifice, plays an important role in the forces developed on the injector needle.
- Fluids Engineering Division
Detached Eddy Simulation of High Pressure Diesel Injectors
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Prater, R, & Lian, Y. "Detached Eddy Simulation of High Pressure Diesel Injectors." Proceedings of the ASME 2014 4th Joint US-European Fluids Engineering Division Summer Meeting collocated with the ASME 2014 12th International Conference on Nanochannels, Microchannels, and Minichannels. Volume 1C, Symposia: Fundamental Issues and Perspectives in Fluid Mechanics; Industrial and Environmental Applications of Fluid Mechanics; Issues and Perspectives in Automotive Flows; Gas-Solid Flows: Dedicated to the Memory of Professor Clayton T. Crowe; Numerical Methods for Multiphase Flow; Transport Phenomena in Energy Conversion From Clean and Sustainable Resources; Transport Phenomena in Materials Processing and Manufacturing Processes. Chicago, Illinois, USA. August 3–7, 2014. V01CT17A005. ASME. https://doi.org/10.1115/FEDSM2014-21383
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