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Journal Articles

Shape Optimization of an Industrial Aeroengine Combustor to Reduce Thermoacoustic Instability

Ekrem Ekici, Matthew P. Juniper
Journal: Journal of Engineering for Gas Turbines and Power
Publisher: ASME
Article Type: Research-Article
J. Eng. Gas Turbines Power. July 2025, 147(7): 071016.
Paper No: GTP-24-1654
https://doi.org/10.1115/1.4067337
Published Online: January 20, 2025
View Article titled, Shape Optimization of an Industrial Aeroengine Combustor to Reduce Thermoacoustic Instability
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Topics: Combustion chambers, Deformation, Geometry, Shapes, Eigenvalues, Boundary-value problems, Shape optimization
Journal Articles

Bayesian Data Assimilation in Cold Flow Experiments on an Industrial Thermoacoustic Rig

Jingquan Zheng, André Fischer, Claus Lahiri, Matthew Yoko, Matthew P. Juniper
Journal: Journal of Engineering for Gas Turbines and Power
Publisher: ASME
Article Type: Research-Article
J. Eng. Gas Turbines Power. May 2025, 147(5): 051008.
Paper No: GTP-24-1575
https://doi.org/10.1115/1.4066611
Published Online: November 14, 2024
View Article titled, Bayesian Data Assimilation in Cold Flow Experiments on an Industrial Thermoacoustic Rig
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Topics: Acoustics, Ducts, Ejectors, Emissions, Energy dissipation, Flow (Dynamics), Reflectance, S-matrix theory, Uncertainty, Probability
Journal Articles

Inferring Flame Transfer Functions of Turbulent Conical Flames From Pressure Measurements

Matthew Yoko, Matthew P. Juniper
Journal: Journal of Engineering for Gas Turbines and Power
Publisher: ASME
Article Type: Research-Article
J. Eng. Gas Turbines Power. May 2025, 147(5): 051007.
Paper No: GTP-24-1574
https://doi.org/10.1115/1.4066616
Published Online: November 14, 2024
View Article titled, Inferring Flame Transfer Functions of Turbulent Conical Flames From Pressure Measurements
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Topics: Ducts, Flames, Transfer functions, Turbulence, Uncertainty, Heat, Pressure, Acoustics, Pressure measurement
Proceedings Papers

Adjoint Based Shape Optimization for Thermoacoustic Stability of Combustors Using Free Form Deformation

Ekrem Ekici, Matthew P. Juniper
Proc. ASME. GT2024, Volume 3A: Combustion, Fuels, and Emissions, V03AT04A058, June 24–28, 2024
Publisher: American Society of Mechanical Engineers
Paper No: GT2024-125711
https://doi.org/10.1115/GT2024-125711
View Paper titled, Adjoint Based Shape Optimization for Thermoacoustic Stability of Combustors Using Free Form Deformation
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Topics: Combustion chambers, Deformation, Finite element methods, Shape optimization, Stability
Proceedings Papers

Inferring Flame Transfer Functions of Turbulent Conical Flames From Pressure Measurements

Matthew Yoko, Matthew P. Juniper
Proc. ASME. GT2024, Volume 3A: Combustion, Fuels, and Emissions, V03AT04A019, June 24–28, 2024
Publisher: American Society of Mechanical Engineers
Paper No: GT2024-122798
https://doi.org/10.1115/GT2024-122798
View Paper titled, Inferring Flame Transfer Functions of Turbulent Conical Flames From Pressure Measurements
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Topics: Flames, Pressure measurement, Transfer functions, Turbulence
Proceedings Papers

Learning RANS Model Parameters From LES Using Bayesian Inference

Santosh Hemchandra, Anindya Datta, Matthew P. Juniper
Proc. ASME. GT2023, Volume 3A: Combustion, Fuels, and Emissions, V03AT04A051, June 26–30, 2023
Publisher: American Society of Mechanical Engineers
Paper No: GT2023-102159
https://doi.org/10.1115/GT2023-102159
View Paper titled, Learning RANS Model Parameters From LES Using Bayesian Inference
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Topics: Reynolds-averaged Navier–Stokes equations, Flow (Dynamics), Design, Turbulence, Combustion, Eddies (Fluid dynamics), Energy dissipation, Engineering design, Engineering simulation, Flames
Proceedings Papers

Real-Time Parameter Inference of Nonlinear Bluff-Body-Stabilized Flame Models Using Bayesian Neural Network Ensembles

Maximilian L. Croci, Ushnish Sengupta, Ekrem Ekici, Matthew P. Juniper
Proc. ASME. GT2023, Volume 3A: Combustion, Fuels, and Emissions, V03AT04A028, June 26–30, 2023
Publisher: American Society of Mechanical Engineers
Paper No: GT2023-101460
https://doi.org/10.1115/GT2023-101460
View Paper titled, Real-Time Parameter Inference of Nonlinear Bluff-Body-Stabilized Flame Models Using Bayesian Neural Network Ensembles
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Topics: Artificial neural networks, Flames
Journal Articles

Shape Optimization of Thermoacoustic Systems Using a Two-Dimensional Adjoint Helmholtz Solver

Stefano Falco, Matthew P. Juniper
Journal: Journal of Engineering for Gas Turbines and Power
Publisher: ASME
Article Type: Research-Article
J. Eng. Gas Turbines Power. July 2021, 143(7): 071025.
Paper No: GTP-20-1460
https://doi.org/10.1115/1.4049305
Published Online: March 31, 2021
View Article titled, Shape Optimization of Thermoacoustic Systems Using a Two-Dimensional Adjoint Helmholtz Solver
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Topics: Combustion chambers, Eigenvalues, Shapes, Turbulence, Shape optimization, Heat, Acoustics, Flames
Journal Articles

Bayesian Machine Learning for the Prognosis of Combustion Instabilities From Noise

Ushnish Sengupta, Carl E. Rasmussen, Matthew P. Juniper
Journal: Journal of Engineering for Gas Turbines and Power
Publisher: ASME
Article Type: Research-Article
J. Eng. Gas Turbines Power. July 2021, 143(7): 071001.
Paper No: GTP-20-1599
https://doi.org/10.1115/1.4049762
Published Online: March 29, 2021
View Article titled, Bayesian Machine Learning for the Prognosis of Combustion Instabilities From Noise
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Topics: Acoustics, Artificial neural networks, Combustion, Combustion chambers, Machine learning, Noise (Sound), Turbulence
Journal Articles

Assimilation of Experimental Data to Create a Quantitatively Accurate Reduced-Order Thermoacoustic Model

Francesco Garita, Hans Yu, Matthew P. Juniper
Journal: Journal of Engineering for Gas Turbines and Power
Publisher: ASME
Article Type: Research-Article
J. Eng. Gas Turbines Power. February 2021, 143(2): 021008.
Paper No: GTP-20-1537
https://doi.org/10.1115/1.4048569
Published Online: January 18, 2021
View Article titled, Assimilation of Experimental Data to Create a Quantitatively Accurate Reduced-Order Thermoacoustic Model
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Topics: Acoustics, Flow (Dynamics), Oscillations, Thermocouples, Temperature, Pressure, Heat, Momentum, Network models, Boundary layers
Proceedings Papers

Assimilation of Experimental Data to Create a Quantitatively-Accurate Reduced Order Thermoacoustic Model

Francesco Garita, Hans Yu, Matthew P. Juniper
Proc. ASME. GT2020, Volume 4A: Combustion, Fuels, and Emissions, V04AT04A048, September 21–25, 2020
Publisher: American Society of Mechanical Engineers
Paper No: GT2020-14929
https://doi.org/10.1115/GT2020-14929
View Paper titled, Assimilation of Experimental Data to Create a Quantitatively-Accurate Reduced Order Thermoacoustic Model
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Topics: Acoustics, Boundary layers, Energy dissipation, Flow (Dynamics), Fluctuations (Physics), Heat, Kalman filters, Loudspeakers, Momentum, Natural convection
Proceedings Papers

Shape Optimization of Thermoacoustic Systems Using a 2D Adjoint Helmholtz Solver

Stefano Falco, Matthew P. Juniper
Proc. ASME. GT2020, Volume 4A: Combustion, Fuels, and Emissions, V04AT04A051, September 21–25, 2020
Publisher: American Society of Mechanical Engineers
Paper No: GT2020-14971
https://doi.org/10.1115/GT2020-14971
View Paper titled, Shape Optimization of Thermoacoustic Systems Using a 2D Adjoint Helmholtz Solver
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Topics: Shape optimization, Combustion chambers, Geometry, Turbulence, Wavelength, Acoustics, Design, Finite element analysis, Flames, Shapes
Proceedings Papers

Bayesian Machine Learning for the Prognosis of Combustion Instabilities From Noise

Ushnish Sengupta, Carl E. Rasmussen, Matthew P. Juniper
Proc. ASME. GT2020, Volume 4A: Combustion, Fuels, and Emissions, V04AT04A047, September 21–25, 2020
Publisher: American Society of Mechanical Engineers
Paper No: GT2020-14904
https://doi.org/10.1115/GT2020-14904
View Paper titled, Bayesian Machine Learning for the Prognosis of Combustion Instabilities From Noise
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Topics: Combustion, Machine learning, Noise (Sound), Acoustics, Flames, Algorithms, Artificial neural networks, Boundary-value problems, Combustion chambers, Fingerprints
Journal Articles

Data Assimilation and Optimal Calibration in Nonlinear Models of Flame Dynamics

Hans Yu, Thomas Jaravel, Matthias Ihme, Matthew P. Juniper, Luca Magri
Journal: Journal of Engineering for Gas Turbines and Power
Publisher: ASME
Article Type: Research-Article
J. Eng. Gas Turbines Power. December 2019, 141(12): 121010.
Paper No: GTP-19-1369
https://doi.org/10.1115/1.4044378
Published Online: November 15, 2019
View Article titled, Data Assimilation and Optimal Calibration in Nonlinear Models of Flame Dynamics
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Topics: Dynamics (Mechanics), Flames, Simulation, Kalman filters, Calibration, Uncertainty, Parameter estimation
Proceedings Papers

Data Assimilation and Optimal Calibration in Nonlinear Models of Flame Dynamics

Hans Yu, Thomas Jaravel, Matthias Ihme, Matthew P. Juniper, Luca Magri
Proc. ASME. GT2019, Volume 4B: Combustion, Fuels, and Emissions, V04BT04A058, June 17–21, 2019
Publisher: American Society of Mechanical Engineers
Paper No: GT2019-92052
https://doi.org/10.1115/GT2019-92052
View Paper titled, Data Assimilation and Optimal Calibration in Nonlinear Models of Flame Dynamics
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Topics: Calibration, Dynamics (Mechanics), Flames, Flow (Dynamics), Algorithms, Computer simulation, Engineering simulation, Filters, Gas turbines, Kalman filters
Proceedings Papers

Adjoint Methods for Elimination of Thermoacoustic Oscillations in a Model Annular Combustor via Small Geometry Modifications

José G. Aguilar, Matthew P. Juniper
Proc. ASME. GT2018, Volume 4A: Combustion, Fuels, and Emissions, V04AT04A054, June 11–15, 2018
Publisher: American Society of Mechanical Engineers
Paper No: GT2018-75692
https://doi.org/10.1115/GT2018-75692
View Paper titled, Adjoint Methods for Elimination of Thermoacoustic Oscillations in a Model Annular Combustor via Small Geometry Modifications
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Topics: Combustion chambers, Geometry, Oscillations, Acoustics, Delays, Flames, Heat, Sensitivity analysis, Sound pressure, Boundary-value problems
Proceedings Papers

Experimental Sensitivity Analysis and the Equivalence of Pulsed Forcing and Feedback Control in Thermoacoustic Systems

Nicholas P. Jamieson, Matthew P. Juniper
Proc. ASME. GT2017, Volume 4A: Combustion, Fuels and Emissions, V04AT04A035, June 26–30, 2017
Publisher: American Society of Mechanical Engineers
Paper No: GT2017-63441
https://doi.org/10.1115/GT2017-63441
View Paper titled, Experimental Sensitivity Analysis and the Equivalence of Pulsed Forcing and Feedback Control in Thermoacoustic Systems
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Topics: Feedback, Sensitivity analysis, Fluids, Loudspeakers, Sprays, Switches
Proceedings Papers

Adjoint Sensitivity Analysis of Hydrodynamic Stability in a Gas Turbine Fuel Injector

Outi Tammisola, Matthew P. Juniper
Proc. ASME. GT2015, Volume 4A: Combustion, Fuels and Emissions, V04AT04A057, June 15–19, 2015
Publisher: American Society of Mechanical Engineers
Paper No: GT2015-42736
https://doi.org/10.1115/GT2015-42736
View Paper titled, Adjoint Sensitivity Analysis of Hydrodynamic Stability in a Gas Turbine Fuel Injector
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Topics: Fuel injectors, Gas turbines, Hydrodynamic stability, Sensitivity analysis, Oscillations, Flow (Dynamics), Stability, Combustion chambers, Ejectors, Acoustics
Proceedings Papers

Stability Criteria for Standing and Spinning Waves in Annular Combustors

Giulio Ghirardo, Matthew P. Juniper, Jonas P. Moeck
Proc. ASME. GT2015, Volume 4B: Combustion, Fuels and Emissions, V04BT04A005, June 15–19, 2015
Publisher: American Society of Mechanical Engineers
Paper No: GT2015-43127
https://doi.org/10.1115/GT2015-43127
View Paper titled, Stability Criteria for Standing and Spinning Waves in Annular Combustors
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Topics: Combustion chambers, Spin (Aerodynamics), Spinning (Textile), Stability, Waves, Flames, Oscillations, Acoustics, Annulus, Damping
Proceedings Papers

Heat Release Response to Forced Flow Oscillations of a Low-Order Modelled Laboratory Scale Dump Combustor

Alessandro Orchini, Matthew P. Juniper
Proc. ASME. GT2015, Volume 4B: Combustion, Fuels and Emissions, V04BT04A013, June 15–19, 2015
Publisher: American Society of Mechanical Engineers
Paper No: GT2015-43219
https://doi.org/10.1115/GT2015-43219
View Paper titled, Heat Release Response to Forced Flow Oscillations of a Low-Order Modelled Laboratory Scale Dump Combustor
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Topics: Combustion chambers, Flow (Dynamics), Heat, Oscillations, Flames, Dynamics (Mechanics), Fluctuations (Physics), Kinematics, Geometry, Traveling waves