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Keywords: turbulence modeling
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Journal Articles

Tuning of Generalized K-Omega Turbulence Model by Using Adjoint Optimization and Machine Learning for Gas Turbine Combustor Applications

George Klavaris, Min Xu, Chris Hill, Florian Menter, Saurabh Patwardhan, Ishan Verma
Journal: Journal of Engineering for Gas Turbines and Power
Publisher: ASME
Article Type: Research-Article
J. Eng. Gas Turbines Power. August 2024, 146(8): 081014.
Paper No: GTP-23-1619
https://doi.org/10.1115/1.4064367
Published Online: February 26, 2024
...George Klavaris; Min Xu; Chris Hill; Florian Menter; Saurabh Patwardhan; Ishan Verma Turbulence modeling plays a crucial role in swirl-stabilized gas turbine combustors, typically relying on scale-resolved simulations (SRS) such as large eddy simulations (LES). However, LES is computationally...
View Article titled, Tuning of Generalized K-Omega <span class="search-highlight">Turbulence</span> <span class="search-highlight">Model</span> by Using Adjoint Optimization and Machine Learning for Gas Turbine Combustor Applications
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Topics: Artificial neural networks, Flow (Dynamics), Gas turbines, Machine learning, Modeling, Optimization, Turbulence, Combustion chambers, Reynolds-averaged Navier–Stokes equations, Reynolds number
Journal Articles

An Experimental and Numerical Investigation to Improve the Efficiency of Combustion Systems for Heavy-Duty Applications

Jaykumar Yadav, Stefan Pischinger, Sascha Schönfeld, Kai Deppenkemper
Journal: Journal of Engineering for Gas Turbines and Power
Publisher: ASME
Article Type: Research-Article
J. Eng. Gas Turbines Power. September 2023, 145(9): 091002.
Paper No: GTP-23-1086
https://doi.org/10.1115/1.4062559
Published Online: July 19, 2023
... single-cylinder diesel engine in the best efficiency and rated power operation. Heat transfer and turbulence models are studied to determine their influence on the combustion process and NO X emissions. Indicated thermal efficiency and air utilization were used to evaluate the performance of the piston...
View Article titled, An Experimental and Numerical Investigation to Improve the Efficiency of Combustion Systems for Heavy-Duty Applications
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Topics: Combustion, Compression, Computational fluid dynamics, Emissions, Engines, Fuels, Optimization, Pistons, Shapes, Sprays
Journal Articles

Capturing Cyclic Variability in Exhaust Gas Recirculation Dilute Spark-Ignition Combustion Using Multicycle RANS

Riccardo Scarcelli, James Sevik, Thomas Wallner, Keith Richards, Eric Pomraning, Peter K. Senecal
Journal: Journal of Engineering for Gas Turbines and Power
Publisher: ASME
Article Type: Research-Article
J. Eng. Gas Turbines Power. November 2016, 138(11): 112803.
Paper No: GTP-16-1079
https://doi.org/10.1115/1.4033184
Published Online: May 17, 2016
... engines Modeling and simulation Turbulence modeling Due to the U.S. heavy reliance on gasoline engines for automotive transportation, efficiency improvements of advanced gasoline combustion concepts have the potential to dramatically reduce foreign oil consumption. While downsized, turbocharged...
View Article titled, Capturing Cyclic Variability in Exhaust Gas Recirculation Dilute Spark-Ignition Combustion Using Multicycle RANS
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Topics: Combustion, Computational fluid dynamics, Cycles, Engines, Exhaust gas recirculation, Ignition, Pressure, Reynolds-averaged Navier–Stokes equations, Simulation, Stability
Journal Articles

Nonlinear Versus Linear Stress-Strain Relations in Engine Turbulence Modeling Under Swirl and Squish Flow Conditions

Mirko Baratta, Andrea E. Catania, Stefano d’Ambrosio
Journal: Journal of Engineering for Gas Turbines and Power
Publisher: ASME
Article Type: Research Papers
J. Eng. Gas Turbines Power. November 2008, 130(6): 062802.
https://doi.org/10.1115/1.2938274
Published Online: August 21, 2008
...Mirko Baratta; Andrea E. Catania; Stefano d’Ambrosio A general form of the stress-strain constitutive relation was introduced for the application of two nonlinear k - ε turbulence models, namely, the algebraic Reynolds stress model of Gatski and Speziale (1993, “On Explicit Algebraic Stress Models...
View Article titled, Nonlinear Versus Linear Stress-Strain Relations in Engine <span class="search-highlight">Turbulence</span> <span class="search-highlight">Modeling</span> Under Swirl and Squish Flow Conditions
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Topics: Engines, Flow (Dynamics), Pistons, Stress, Stress-strain relations, Turbulence, Modeling, Anisotropy