High-performance computing and analysis-led development of high efficiency dilute opposed piston gasoline engine

Siddhartha Banerjee; Clayton Naber; Michael Willcox; Charles E.A. Finney; Dean K. Edwards

doi:10.1115/1.4039845

High-performance computing and analysis-led development of high efficiency dilute opposed piston gasoline engine

Siddhartha Banerjee, Clayton Naber, Michael Willcox, Charles E.A. Finney, Dean K. Edwards

Combustion and Fuel Science Research

Research output: Contribution to journal › Article › peer-review

8 Scopus citations

Abstract

Pinnacle is developing a multicylinder 1.2 L gasoline engine for automotive applications using high-performance computing (HPC) and analysis methods. Pinnacle and Oak Ridge National Laboratory executed large-scale multidimensional combustion analyses at the Oak Ridge Leadership Computing Facility to thoroughly explore the design space. These HPC-led investigations show high fuel efficiency (∼46% gross indicated efficiency) may be achieved by operating with extremely high charge dilution levels of exhaust gas recirculation (EGR) at a light load key drive cycle condition (2000 RPM, 3 bar brake mean effective pressure (BMEP)), while simultaneously attaining high levels of fuel conversion efficiency and low NO_x emissions. In this extremely dilute environment, the flame propagation event is supported by turbulence and bulk in-cylinder charge motion brought about by modulation of inlet port flow. This arrangement produces a load and speed adjustable amalgamation of swirl and counter-rotating tumble which provides the turbulence required to support stable low-temperature combustion. At higher load conditions, the engine may operate at more traditional combustion modes to generate competitive power. In this paper, the numerical results from these HPC simulations are presented. Further HPC simulations and test validations are underway and will be reported in future publications.

Original language	English
Article number	102803
Journal	Journal of Engineering for Gas Turbines and Power
Volume	140
Issue number	10
DOIs	https://doi.org/10.1115/1.4039845
State	Published - Oct 1 2018

Funding

This research used resources of the Oak Ridge Leadership Computing Facility, which is a DOE Office of Science User Facility supported under Contract DE-AC05-00OR22725. This paper has been authored by UT-Battelle, LLC under Contract No. DE-AC05-00OR22725 with the U.S. Department of Energy. The United States Government retains and the publisher, by accepting the paper for publication, acknowledges that the United States Government retains a nonexclusive, paid-up, irrevocable, worldwide license to publish or reproduce the published form of this paper, or allow others to do so, for United States Government purposes. The Department of Energy will provide public access to these results of federally sponsored research in accordance with the DOE Public Access Plan2. Authors would also like to acknowledge Convergent Science for their technical support in conducting this work. • This research work was funded by the U.S. Department of Energy (DOE) under Small Business Voucher Program Cooperative Research and Development Agreement (CRADA) No. NFE-16-06356.

Funders	Funder number
CRADA	NFE-16-06356
Small Business Voucher Program Cooperative Research and Development Agreement
U.S. Department of Energy
Office of Science	DE-AC05-00OR22725

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abstract = "Pinnacle is developing a multicylinder 1.2 L gasoline engine for automotive applications using high-performance computing (HPC) and analysis methods. Pinnacle and Oak Ridge National Laboratory executed large-scale multidimensional combustion analyses at the Oak Ridge Leadership Computing Facility to thoroughly explore the design space. These HPC-led investigations show high fuel efficiency (∼46% gross indicated efficiency) may be achieved by operating with extremely high charge dilution levels of exhaust gas recirculation (EGR) at a light load key drive cycle condition (2000 RPM, 3 bar brake mean effective pressure (BMEP)), while simultaneously attaining high levels of fuel conversion efficiency and low NOx emissions. In this extremely dilute environment, the flame propagation event is supported by turbulence and bulk in-cylinder charge motion brought about by modulation of inlet port flow. This arrangement produces a load and speed adjustable amalgamation of swirl and counter-rotating tumble which provides the turbulence required to support stable low-temperature combustion. At higher load conditions, the engine may operate at more traditional combustion modes to generate competitive power. In this paper, the numerical results from these HPC simulations are presented. Further HPC simulations and test validations are underway and will be reported in future publications.",

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High-performance computing and analysis-led development of high efficiency dilute opposed piston gasoline engine

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