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Title: Large Eddy Simulation of a Supercritical Fuel Jet in Cross Flow using GPU-Acceleration

Abstract

Fuel is routinely injected into combustion chambers at elevated pressures resulting in formation of supercritical fluid flow. The dispersion of fuel and the combustion processes are significantly di↵erent in high pressure conditions as the raditional liquid atomization and evaporation are replaced by di↵usion-dominated mixing. Modeling supercritical flow is challenging due to the complex thermodynamics and transport properties of the fluids and in most cases high fidelity numerical simulations are prohibitively expensive. However, numerical investigations must incorporate the flow properties appropriate for the regime for accurate description of the physical processes involved. In this paper, we consider real-fluid properties and simulate the turbulent mixing of fuel jet in cross flow at high ambient pressure. In order to make efficient use of the computer resources and reduce the time to solution, without compromising the resolution requirements, the real-fluid property routines are accelerated via Graphics Processing Unit (GPU) computation. The numerical simulations performed at di↵erent resolutions suggest that the high fidelity computations with refined mesh are essential to capture the non-linear dynamics of vortex evolution downstream of the fuel jet and signifies the necessity for an accelerated code. The code is accelerated using the Kokkos C++ library and is demonstrated to be aboutmore » 2 times faster than the non-accelerated version. Considerable computational cost associated with the thermodynamics routines is reduced in the accelerated version. The results also suggest the resource requirements to compute turbulent closures and the need for acceleration of the routines associated with the sub-grid scale closures.« less

Authors:
 [1];  [1];  [2];  [2];  [2]
  1. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Center for Computational Sciences
  2. Sandia National Lab. (SNL-CA), Livermore, CA (United States). Combustion Research Facility
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Oak Ridge Leadership Computing Facility (OLCF)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22). Chemical Sciences, Geosciences & Biosciences Division
OSTI Identifier:
1567675
DOE Contract Number:  
AC05-00OR22725
Resource Type:
Conference
Resource Relation:
Conference: 54th AIAA Aerospace Sciences Meeting, 4-8 January 2016, San Diego, California, USA
Country of Publication:
United States
Language:
English

Citation Formats

Gottiparthi, Kalyana C., Sankaran, Ramanan, Ruiz, Anthony M., Lacaze, Guilhem, and Oefelein, Joseph C. Large Eddy Simulation of a Supercritical Fuel Jet in Cross Flow using GPU-Acceleration. United States: N. p., 2016. Web. doi:10.2514/6.2016-1939.
Gottiparthi, Kalyana C., Sankaran, Ramanan, Ruiz, Anthony M., Lacaze, Guilhem, & Oefelein, Joseph C. Large Eddy Simulation of a Supercritical Fuel Jet in Cross Flow using GPU-Acceleration. United States. doi:10.2514/6.2016-1939.
Gottiparthi, Kalyana C., Sankaran, Ramanan, Ruiz, Anthony M., Lacaze, Guilhem, and Oefelein, Joseph C. Sat . "Large Eddy Simulation of a Supercritical Fuel Jet in Cross Flow using GPU-Acceleration". United States. doi:10.2514/6.2016-1939.
@article{osti_1567675,
title = {Large Eddy Simulation of a Supercritical Fuel Jet in Cross Flow using GPU-Acceleration},
author = {Gottiparthi, Kalyana C. and Sankaran, Ramanan and Ruiz, Anthony M. and Lacaze, Guilhem and Oefelein, Joseph C.},
abstractNote = {Fuel is routinely injected into combustion chambers at elevated pressures resulting in formation of supercritical fluid flow. The dispersion of fuel and the combustion processes are significantly di↵erent in high pressure conditions as the raditional liquid atomization and evaporation are replaced by di↵usion-dominated mixing. Modeling supercritical flow is challenging due to the complex thermodynamics and transport properties of the fluids and in most cases high fidelity numerical simulations are prohibitively expensive. However, numerical investigations must incorporate the flow properties appropriate for the regime for accurate description of the physical processes involved. In this paper, we consider real-fluid properties and simulate the turbulent mixing of fuel jet in cross flow at high ambient pressure. In order to make efficient use of the computer resources and reduce the time to solution, without compromising the resolution requirements, the real-fluid property routines are accelerated via Graphics Processing Unit (GPU) computation. The numerical simulations performed at di↵erent resolutions suggest that the high fidelity computations with refined mesh are essential to capture the non-linear dynamics of vortex evolution downstream of the fuel jet and signifies the necessity for an accelerated code. The code is accelerated using the Kokkos C++ library and is demonstrated to be about 2 times faster than the non-accelerated version. Considerable computational cost associated with the thermodynamics routines is reduced in the accelerated version. The results also suggest the resource requirements to compute turbulent closures and the need for acceleration of the routines associated with the sub-grid scale closures.},
doi = {10.2514/6.2016-1939},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2016},
month = {1}
}

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