We performed Large Eddy Simulation (LES) of a turbulent non-reacting n-Heptane spray jet, referred to as Spray H in the Engine Combustion Network (ECN), and executed a data analysis focused on key LES metrics such as fraction of resolved turbulent kinetic energy and similarity index. In the simulation, we used the dynamic structure model for the sub-grid stress, and the Lagrangian-based spray-parcel models coupled with the blob-injection model. The finest mesh-cell size used was characterized by an Adaptive Mesh Refinement (AMR) cell size of 0.0625 mm. To obtain ensemble statistics, we performed 28 numerical realizations of the simulation. Demonstrated by the comparison with experimental data in a previous study [7], this LES has accurately predicted global quantities, such as liquid and vapor penetrations. The analysis in this work shows that 14 realizations of LES are sufficient to provide a reasonable representation of the average flow behavior that is benchmarked against the 28-realization ensemble. With the current mesh, numerical schemes, and sub-grid scale turbulence model, more than 95% of the turbulent kinetic energy is directly resolved in the flow regions of interest. The large-scale flow structures inferred from a statistical analysis reveal a region of disorganized flow around the peripheral region of the spray jet, which appears to be linked to the entrainment process.
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ASME 2015 Internal Combustion Engine Division Fall Technical Conference
November 8–11, 2015
Houston, Texas, USA
Conference Sponsors:
- Internal Combustion Engine Division
ISBN:
978-0-7918-5728-1
PROCEEDINGS PAPER
Large Eddy Simulation of a Turbulent Non-Reacting Spray Jet Available to Purchase
P. K. Senecal,
P. K. Senecal
Convergent Science Inc., Middleton, WI
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E. Pomraning
E. Pomraning
Convergent Science Inc., Middleton, WI
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B. Hu
Cummins Inc., Columbus, IN
S. Banerjee
Cummins Inc., Columbus, IN
K. Liu
Cummins Inc., Columbus, IN
D. Rajamohan
Cummins Inc., Columbus, IN
J. M. Deur
Cummins Inc., Columbus, IN
Q. Xue
Argonne National Laboratory, Argonne, IL
S. Som
Argonne National Laboratory, Argonne, IL
P. K. Senecal
Convergent Science Inc., Middleton, WI
E. Pomraning
Convergent Science Inc., Middleton, WI
Paper No:
ICEF2015-1033, V002T06A007; 10 pages
Published Online:
January 12, 2016
Citation
Hu, B, Banerjee, S, Liu, K, Rajamohan, D, Deur, JM, Xue, Q, Som, S, Senecal, PK, & Pomraning, E. "Large Eddy Simulation of a Turbulent Non-Reacting Spray Jet." Proceedings of the ASME 2015 Internal Combustion Engine Division Fall Technical Conference. Volume 2: Emissions Control Systems; Instrumentation, Controls, and Hybrids; Numerical Simulation; Engine Design and Mechanical Development. Houston, Texas, USA. November 8–11, 2015. V002T06A007. ASME. https://doi.org/10.1115/ICEF2015-1033
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