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Journal Articles

A Reactor-Network Framework to Model Performance and Emissions of a Longitudinally Staged Combustion System for Carbon-Free Fuels

Harish S. Gopalakrishnan, Raj Maddipati, Andrea Gruber, Mirko R. Bothien, Konduri Aditya
Journal: Journal of Engineering for Gas Turbines and Power
Publisher: ASME
Article Type: Research-Article
J. Eng. Gas Turbines Power. December 2024, 146(12): 121012.
Paper No: GTP-24-1292
https://doi.org/10.1115/1.4066164
Published Online: September 5, 2024
View Article titled, A Reactor-Network Framework to Model Performance and Emissions of a Longitudinally Staged Combustion System for Carbon-Free Fuels
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Topics: Combustion, Combustion systems, Emissions, Flames, Fuels, Hydrogen, Nitrogen oxides, Combustion chambers, Temperature
Proceedings Papers

A Reactor-Network Framework to Model Performance and Emissions of a Longitudinally-Staged Combustion System for Carbon-Free Fuels

Harish S. Gopalakrishnan, Raj Maddipati, Andrea Gruber, Mirko R. Bothien, Konduri Aditya
Proc. ASME. GT2024, Volume 3B: Combustion, Fuels, and Emissions, V03BT04A064, June 24–28, 2024
Publisher: American Society of Mechanical Engineers
Paper No: GT2024-129095
https://doi.org/10.1115/GT2024-129095
View Paper titled, A Reactor-Network Framework to Model Performance and Emissions of a Longitudinally-Staged Combustion System for Carbon-Free Fuels
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Topics: Carbon, Combustion systems, Emissions, Fuels, Hydrogen, Nitrogen oxides, Firing, Combustion chambers, Flames, Natural gas
Journal Articles

Computation of Intrinsic Instability and Sound Generation From Auto-Ignition Fronts

Harish S. Gopalakrishnan, Andrea Gruber, Jonas Moeck
Journal: Journal of Engineering for Gas Turbines and Power
Publisher: ASME
Article Type: Research-Article
J. Eng. Gas Turbines Power. April 2023, 145(4): 041008.
Paper No: GTP-22-1354
https://doi.org/10.1115/1.4055421
Published Online: December 13, 2022
View Article titled, Computation of Intrinsic Instability and Sound Generation From Auto-Ignition Fronts
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Topics: Acoustics, Combustion chambers, Computation, Fluctuations (Physics), Ignition, Pressure, Waves, Oscillations, Flow (Dynamics), Heat
Journal Articles

Response of Auto-Ignition-Stabilized Flames to One-Dimensional Disturbances: Intrinsic Response

Harish S. Gopalakrishnan, Andrea Gruber, Jonas Moeck
Journal: Journal of Engineering for Gas Turbines and Power
Publisher: ASME
Article Type: Research-Article
J. Eng. Gas Turbines Power. December 2021, 143(12): 121011.
Paper No: GTP-21-1332
https://doi.org/10.1115/1.4052058
Published Online: October 5, 2021
View Article titled, Response of Auto-Ignition-Stabilized Flames to One-Dimensional Disturbances: Intrinsic Response
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Topics: Acoustics, Combustion chambers, Flames, Fluctuations (Physics), Heat, Ignition, Temperature, Waves, Pressure, Particulate matter
Proceedings Papers

Response of Autoignition-Stabilized Flames to One-Dimensional Disturbances: Intrinsic Response

Harish S. Gopalakrishnan, Andrea Gruber, Jonas Moeck
Proc. ASME. GT2021, Volume 3A: Combustion, Fuels, and Emissions, V03AT04A052, June 7–11, 2021
Publisher: American Society of Mechanical Engineers
Paper No: GT2021-59351
https://doi.org/10.1115/GT2021-59351
View Paper titled, Response of Autoignition-Stabilized Flames to One-Dimensional Disturbances: Intrinsic Response
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Topics: Flames, Acoustics, Combustion chambers, Fluctuations (Physics), Combustion, Oscillations, Temperature, Carbon, Chemistry, Computer simulation
Proceedings Papers

Scattering and Transmission of Mixed-Mode Waves in Delaminated Thick Composite Beams

D. Roy Mahapatra, S. Gopalakrishnan, T. S. Sankar
Proc. ASME. IDETC-CIE2001, Volume 6B: 18th Biennial Conference on Mechanical Vibration and Noise, 2043-2050, September 9–12, 2001
Publisher: American Society of Mechanical Engineers
Paper No: DETC2001/VIB-21543
https://doi.org/10.1115/DETC2001/VIB-21543
View Paper titled, Scattering and Transmission of Mixed-Mode Waves in Delaminated Thick Composite Beams
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Topics: Composite building materials, Electromagnetic scattering, Radiation scattering, Scattering (Physics), Waves, Delamination, Finite element methods, Finite element analysis, Algorithms, Composite materials
Proceedings Papers

A Numerical Technique for the Calculation of Transonic Flows in Turbomachinery Cascades

S. Gopalakrishnan, R. Bozzola
Proc. ASME. GT1971, ASME 1971 International Gas Turbine Conference and Products Show, V001T01A042, March 28–April 1, 1971
Publisher: American Society of Mechanical Engineers
Paper No: 71-GT-42
https://doi.org/10.1115/71-GT-42
View Paper titled, A Numerical Technique for the Calculation of Transonic Flows in Turbomachinery Cascades
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Topics: Transonic flow, Turbomachinery, Cascades (Fluid dynamics), Flow (Dynamics), Nozzles, Reflection, Shock (Mechanics), Turbines
Proceedings Papers

Computation of Shocked Flows in Compressor Cascades

S. Gopalakrishnan, R. Bozzola
Proc. ASME. GT1972, ASME 1972 International Gas Turbine and Fluids Engineering Conference and Products Show, V001T01A030, March 26–30, 1972
Publisher: American Society of Mechanical Engineers
Paper No: 72-GT-31
https://doi.org/10.1115/72-GT-31
View Paper titled, Computation of Shocked Flows in Compressor Cascades
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Topics: Compressors, Computation, Flow (Dynamics), Pressure, Cascades (Fluid dynamics), Shock (Mechanics)
Proceedings Papers

Critical Speed in Centrifugal Pumps

S. Gopalakrishnan, R. Fehlau, J. Lorett
Proc. ASME. GT1982, Volume 5: Manufacturing Materials and Metallurgy; Ceramics; Structures and Dynamics; Controls, Diagnostics and Instrumentation; Education; Process Industries; Technology Resources; General, V005T16A008, April 18–22, 1982
Publisher: American Society of Mechanical Engineers
Paper No: 82-GT-277
https://doi.org/10.1115/82-GT-277
View Paper titled, Critical Speed in Centrifugal Pumps
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Topics: Centrifugal pumps, Fluids, Pumps, Boilers, Bushings, Clearances (Engineering), Damping, Design, High pressure (Physics), Pressure drop
Journal Articles

Spectral Finite Element Formulation for Nanorods via Nonlocal Continuum Mechanics

S. Narendar, S. Gopalakrishnan
Journal: Journal of Applied Mechanics
Publisher: ASME
Article Type: Research Papers
J. Appl. Mech. November 2011, 78(6): 061018.
https://doi.org/10.1115/1.4003909
Published Online: August 26, 2011
View Article titled, Spectral Finite Element Formulation for Nanorods via Nonlocal Continuum Mechanics
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Topics: Elasticity, Finite element analysis, Nanorods, Stiffness, Continuum mechanics, Computation
Journal Articles

Spectral Element Approach to Wave Propagation in Uncertain Composite Beam Structures

V. Ajith, S. Gopalakrishnan
Journal: Journal of Vibration and Acoustics
Publisher: ASME
Article Type: Research Papers
J. Vib. Acoust. October 2011, 133(5): 051006.
https://doi.org/10.1115/1.4003945
Published Online: July 26, 2011
View Article titled, Spectral Element Approach to Wave Propagation in Uncertain Composite Beam Structures
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Topics: Composite building materials, Composite materials, Density, Fibers, Finite element methods, Materials properties, Reflection, Stress, Uncertainty, Wave propagation
Journal Articles

Spectral and Perturbation Analysis of First-Order Beams With Notch Damage

N. Apetre, M. Ruzzene, S. Hanagud, S. Gopalakrishnan
Journal: Journal of Applied Mechanics
Publisher: ASME
Article Type: Research Papers
J. Appl. Mech. May 2008, 75(3): 031019.
https://doi.org/10.1115/1.2839904
Published Online: May 2, 2008
View Article titled, Spectral and Perturbation Analysis of First-Order Beams With Notch Damage
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Topics: Damage, Finite element analysis, Stress, Displacement, Perturbation theory, Wave propagation, Waves
Journal Articles

Wave Propagation Analysis in Anisotropic Plate Using Wavelet Spectral Element Approach

Mira Mitra, S. Gopalakrishnan
Journal: Journal of Applied Mechanics
Publisher: ASME
Article Type: Technical Briefs
J. Appl. Mech. January 2008, 75(1): 014504.
https://doi.org/10.1115/1.2755125
Published Online: January 16, 2008
View Article titled, Wave Propagation Analysis in Anisotropic Plate Using Wavelet Spectral Element Approach
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Topics: Anisotropy, Approximation, Differential equations, Dimensions, Finite element analysis, Plates (structures), Wave propagation, Wavelets, Waves, Partial differential equations
Journal Articles

A Spectral Finite Element Model for Wave Propagation Analysis in Laminated Composite Plate

A. Chakraborty, S. Gopalakrishnan
Journal: Journal of Vibration and Acoustics
Publisher: ASME
Article Type: Technical Papers
J. Vib. Acoust. August 2006, 128(4): 477–488.
https://doi.org/10.1115/1.2203338
Published Online: February 3, 2006
View Article titled, A Spectral Finite Element Model for Wave Propagation Analysis in Laminated Composite Plate
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Topics: Actuators, Composite materials, Computation, Eigenvalues, Fracture (Materials), Modeling, Plates (structures), Polynomials, Scattering (Physics), Sensors
Journal Articles

Analysis of Wave Propagation in Beams With Transverse and Lateral Cracks Using a Weakly Formulated Spectral Method

N. Hu, H. Fukunaga, M. Kameyama, D. Roy Mahapatra, S. Gopalakrishnan
Journal: Journal of Applied Mechanics
Publisher: ASME
Article Type: Technical Papers
J. Appl. Mech. January 2007, 74(1): 119–127.
https://doi.org/10.1115/1.2188015
Published Online: January 18, 2006
View Article titled, Analysis of Wave Propagation in Beams With Transverse and Lateral Cracks Using a Weakly Formulated Spectral Method
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Topics: Fracture (Materials), Interpolation, Wave propagation, Waves, Cantilever beams, Displacement, Finite element analysis
Journal Articles

Pump Research and Development: Past, Present, and Future—An American Perspective

S. Gopalakrishnan
Journal: Journal of Fluids Engineering
Publisher: ASME
Article Type: Research Papers
J. Fluids Eng. June 1999, 121(2): 237–247.
https://doi.org/10.1115/1.2822197
Published Online: June 1, 1999
View Article titled, Pump Research and Development: Past, Present, and Future—An American Perspective
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Topics: Industrial research, Pumps, Reliability, Centrifugal pumps, Competencies, Design, Failure, Hydraulics, Impellers, Vibration
Journal Articles

Interaction Between Impeller and Volute of Pumps at Off-Design Conditions

J. A. Lorett, S. Gopalakrishnan
Journal: Journal of Fluids Engineering
Publisher: ASME
Article Type: Research Papers
J. Fluids Eng. March 1986, 108(1): 12–18.
https://doi.org/10.1115/1.3242534
Published Online: March 1, 1986
View Article titled, Interaction Between Impeller and Volute of Pumps at Off-Design Conditions
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Topics: Design, Impellers, Pumps, Flow (Dynamics), Computation, Centrifugal pumps, Inflow, Momentum, Pressure, Thrust
Journal Articles

Discussion: “Estimation of Centrifugal Compressor Stability With Diffuser Loss-Range System” (Reeves, G. B., 1977, ASME J. Fluids Eng., 99, pp. 76–81)

S. Gopalakrishnan
Journal: Journal of Fluids Engineering
Publisher: ASME
Article Type: Discussions
J. Fluids Eng. March 1977, 99(1): 81.
https://doi.org/10.1115/1.3448565
Published Online: March 1, 1977
View Article titled, Discussion: “Estimation of Centrifugal Compressor Stability With Diffuser Loss-Range System” (Reeves, G. B., 1977, ASME J. Fluids Eng., 99, pp. 76–81)
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Topics: Compressors, Diffusers, Fluids, Stability
Journal Articles

Discussion: “An Experimental Investigation of the Control of Surge in Radial Compressors Using Close Coupled Resistances” (Dussourd, J. L., Pfannebecker, G. W., and Singhania, S. K., 1977, ASME J. Fluids Eng., 99, pp. 64–74)

S. Gopalakrishnan
Journal: Journal of Fluids Engineering
Publisher: ASME
Article Type: Discussions
J. Fluids Eng. March 1977, 99(1): 74–75.
https://doi.org/10.1115/1.3448561
Published Online: March 1, 1977
View Article titled, Discussion: “An Experimental Investigation of the Control of Surge in Radial Compressors Using Close Coupled Resistances” (Dussourd, J. L., Pfannebecker, G. W., and Singhania, S. K., 1977, ASME J. Fluids Eng., 99, pp. 64–74)
Open the PDF for Discussion: “An Experimental Investigation of the Control of Surge in Radial Compressors Using Close Coupled Resistances” (Dussourd, J. L., Pfannebecker, G. W., and Singhania, S. K., 1977, ASME J. Fluids Eng., 99, pp. 64–74) in another window
Topics: Compressors, Fluids, Surges
Journal Articles

Discussion: “Three-Dimensional Boundary-Layer Computation on the Stationary End-Walls of Centrifugal Turbomachinery” (Davis, W. R., 1976, ASME J. Fluids Eng., 98, pp. 431–441)

S. Gopalakrishnan
Journal: Journal of Fluids Engineering
Publisher: ASME
Article Type: Discussions
J. Fluids Eng. September 1976, 98(3): 442.
https://doi.org/10.1115/1.3448355
Published Online: September 1, 1976
View Article titled, Discussion: “Three-Dimensional Boundary-Layer Computation on the Stationary End-Walls of Centrifugal Turbomachinery” (Davis, W. R., 1976, ASME J. Fluids Eng., 98, pp. 431–441)
Open the PDF for Discussion: “Three-Dimensional Boundary-Layer Computation on the Stationary End-Walls of Centrifugal Turbomachinery” (Davis, W. R., 1976, ASME J. Fluids Eng., 98, pp. 431–441) in another window
Topics: Boundary layers, Computation, Fluids, Turbomachinery