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Journal Articles

Numerical Loss Investigation of a Small Scale, Low Specific Speed Supercritical CO 2 Radial Inflow Turbine

Joshua A. Keep, Ingo H. J. Jahn
Journal: Journal of Engineering for Gas Turbines and Power
Publisher: ASME
Article Type: Research-Article
J. Eng. Gas Turbines Power. September 2019, 141(9): 091003.
Paper No: GTP-18-1697
https://doi.org/10.1115/1.4043430
Published Online: May 6, 2019
View Article titled, Numerical Loss Investigation of a Small Scale, Low Specific Speed Supercritical CO 2 Radial Inflow Turbine
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Topics: Blades, Design, Rotors, Stators, Turbines, Flow (Dynamics)
Journal Articles

Design of an Annular-Radial Diffuser for Operation With a Supercritical CO 2 Radial Inflow Turbine

Joshua A. Keep, Ingo H. J. Jahn
Journal: Journal of Engineering for Gas Turbines and Power
Publisher: ASME
Article Type: Research-Article
J. Eng. Gas Turbines Power. August 2019, 141(8): 081020.
Paper No: GTP-18-1701
https://doi.org/10.1115/1.4043431
Published Online: May 2, 2019
View Article titled, Design of an Annular-Radial Diffuser for Operation With a Supercritical CO 2 Radial Inflow Turbine
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Topics: Design, Diffusers, Flow (Dynamics), Turbines, Pressure, Geometry, Rotors
Journal Articles

Supercritical CO 2 Radial Turbine Design Performance as a Function of Turbine Size Parameters

Jianhui Qi, Thomas Reddell, Kan Qin, Kamel Hooman, Ingo H. J. Jahn
Journal: Journal of Turbomachinery
Publisher: ASME
Article Type: Research-Article
J. Turbomach. August 2017, 139(8): 081008.
Paper No: TURBO-16-1191
https://doi.org/10.1115/1.4035920
Published Online: March 28, 2017
View Article titled, Supercritical CO 2 Radial Turbine Design Performance as a Function of Turbine Size Parameters
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Topics: Design, Rotors, Turbines, Flow (Dynamics)
Proceedings Papers

Performance of Supercritical CO2 Dry Gas Seals Near the Critical Point

Mohd Fairuz Zakariya, Ingo H. J. Jahn
Proc. ASME. GT2016, Volume 9: Oil and Gas Applications; Supercritical CO2 Power Cycles; Wind Energy, V009T36A007, June 13–17, 2016
Publisher: American Society of Mechanical Engineers
Paper No: GT2016-56537
https://doi.org/10.1115/GT2016-56537
View Paper titled, Performance of Supercritical CO2 Dry Gas Seals Near the Critical Point
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Topics: Supercritical carbon dioxide, Fluids, Carbon dioxide, Dams, Flow (Dynamics), Pressure, Brayton cycle, Computational fluid dynamics, Computer simulation, Concentrating solar power
Proceedings Papers

Supercritical CO 2 Radial Turbine Design Performance as a Function of Turbine Size Parameters

Jianhui Qi, Thomas Reddell, Kan Qin, Kamel Hooman, Ingo H. J. Jahn
Proc. ASME. GT2016, Volume 9: Oil and Gas Applications; Supercritical CO2 Power Cycles; Wind Energy, V009T36A020, June 13–17, 2016
Publisher: American Society of Mechanical Engineers
Paper No: GT2016-58137
https://doi.org/10.1115/GT2016-58137
View Paper titled, Supercritical CO 2 Radial Turbine Design Performance as a Function of Turbine Size Parameters
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Topics: Design, Supercritical carbon dioxide, Turbines, Blades, Concentrating solar power, Engineering prototypes, Flow (Dynamics), Geometry, Inflow, Parametric design
Journal Articles

High-Speed Characterization of a Prototype Leaf Seal on an Advanced Seal Test Facility

Michael J. Pekris, Adele Nasti, Ingo H. J. Jahn, Gervas Franceschini
Journal: Journal of Engineering for Gas Turbines and Power
Publisher: ASME
Article Type: Research-Article
J. Eng. Gas Turbines Power. August 2016, 138(8): 082503.
Paper No: GTP-15-1561
https://doi.org/10.1115/1.4032422
Published Online: March 15, 2016
View Article titled, High-Speed Characterization of a Prototype Leaf Seal on an Advanced Seal Test Facility
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Topics: Clearances (Engineering), Engineering prototypes, Leakage, Pressure, Rotors, Temperature, Test facilities, Torque, Uncertainty, Flow (Dynamics)
Journal Articles

Experimental Investigation of a Leaf Seal Prototype at Engine-Representative Speeds and Pressures

Michael J. Pekris, Gervas Franceschini, Ingo H. J. Jahn, David R. H. Gillespie
Journal: Journal of Engineering for Gas Turbines and Power
Publisher: ASME
Article Type: Research-Article
J. Eng. Gas Turbines Power. July 2016, 138(7): 072502.
Paper No: GTP-15-1449
https://doi.org/10.1115/1.4031875
Published Online: December 4, 2015
View Article titled, Experimental Investigation of a Leaf Seal Prototype at Engine-Representative Speeds and Pressures
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Topics: Clearances (Engineering), Engineering prototypes, Engines, Pressure, Rotors, Torque, Test facilities, Geometry, Leakage, Flow (Dynamics)
Journal Articles

Improved Understanding of Stiffness in Leaf-Type Filament Seals

Ingo H. J. Jahn, Gervas Franceschini, Andrew K. Owen, Terry V. Jones, David R. H. Gillespie
Journal: Journal of Turbomachinery
Publisher: ASME
Article Type: Research-Article
J. Turbomach. January 2016, 138(1): 011004.
Paper No: TURBO-14-1309
https://doi.org/10.1115/1.4031579
Published Online: October 13, 2015
View Article titled, Improved Understanding of Stiffness in Leaf-Type Filament Seals
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Topics: Engineering prototypes, Pressure, Rotors, Stiffness, Torque, Flow (Dynamics)
Proceedings Papers

High Speed Characterization of a Prototype Leaf Seal on an Advanced Seal Test Facility

Michael J. Pekris, Adele Nasti, Ingo H. J. Jahn, Gervas Franceschini
Proc. ASME. GT2015, Volume 5C: Heat Transfer, V05CT15A023, June 15–19, 2015
Publisher: American Society of Mechanical Engineers
Paper No: GT2015-43465
https://doi.org/10.1115/GT2015-43465
View Paper titled, High Speed Characterization of a Prototype Leaf Seal on an Advanced Seal Test Facility
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Topics: Engineering prototypes, Test facilities, Engines, Leakage, Rotors, ASME Standards, Flight, Measurement uncertainty, Pressure, Torque
Proceedings Papers

Experimental Investigation of a Leaf Seal Prototype at Engine-Representative Speeds and Pressures

Michael J. Pekris, Gervas Franceschini, Ingo H. J. Jahn, David R. H. Gillespie
Proc. ASME. GT2015, Volume 5C: Heat Transfer, V05CT15A018, June 15–19, 2015
Publisher: American Society of Mechanical Engineers
Paper No: GT2015-43231
https://doi.org/10.1115/GT2015-43231
View Paper titled, Experimental Investigation of a Leaf Seal Prototype at Engine-Representative Speeds and Pressures
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Topics: Engineering prototypes, Engines, Leakage, Stiffness, Torque, Emissions, Fuel consumption, Geometry, Jet engines, Pressure
Proceedings Papers

Maximizing Contacting Filament Seal Performance Retention

Ingo H. J. Jahn
Proc. ASME. GT2013, Volume 3A: Heat Transfer, V03AT15A006, June 3–7, 2013
Publisher: American Society of Mechanical Engineers
Paper No: GT2013-94261
https://doi.org/10.1115/GT2013-94261
View Paper titled, Maximizing Contacting Filament Seal Performance Retention
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Topics: Cycles, Service life (Equipment), Uncertainty
Proceedings Papers

Hydrodynamic Air-Riding in Leaf Seals

Ingo H. J. Jahn, David Gillespie, Paul Cooper
Proc. ASME. GT2013, Volume 3A: Heat Transfer, V03AT15A015, June 3–7, 2013
Publisher: American Society of Mechanical Engineers
Paper No: GT2013-95585
https://doi.org/10.1115/GT2013-95585
View Paper titled, Hydrodynamic Air-Riding in Leaf Seals
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Topics: Design, Engineering prototypes, Flow (Dynamics), Fluid structure interaction, Geometry, Leakage, Lift (Fluid dynamics), Machinery, Pressure, Rotors
Proceedings Papers

Improved Understanding of Negative Stiffness in Filament Seals

Gervas Franceschini, Ingo H. J. Jahn, Andrew K. Owen, Terry V. Jones, David R. H. Gillespie
Proc. ASME. GT2012, Volume 4: Heat Transfer, Parts A and B, 2131-2139, June 11–15, 2012
Publisher: American Society of Mechanical Engineers
Paper No: GT2012-68899
https://doi.org/10.1115/GT2012-68899
View Paper titled, Improved Understanding of Negative Stiffness in Filament Seals
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Topics: Stiffness, Rotors, Displacement, Design, Flow (Dynamics), Fluids, Gas turbines, Geometry, Inertia (Mechanics), Modeling
Proceedings Papers

Negative Stiffness in Gas Turbine Leaf Seals

Ingo H. J. Jahn, Andrew K. Owen, Gervas Franceschini, David R. H. Gillespie
Proc. ASME. GT2011, Volume 5: Heat Transfer, Parts A and B, 993-998, June 6–10, 2011
Publisher: American Society of Mechanical Engineers
Paper No: GT2011-46483
https://doi.org/10.1115/GT2011-46483
View Paper titled, Negative Stiffness in Gas Turbine Leaf Seals
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Topics: Gas turbines, Stiffness, Rotors, Displacement, Pressure, Engineering prototypes, Engines, Flow (Dynamics)
Proceedings Papers

Experimental Characterisation of the Stiffness and Leakage of a Prototype Leaf Seal for Turbine Applications

Ingo H. J. Jahn, Andrew K. Owen, Gervas Franceschini, David Gillespie
Proc. ASME. GT2008, Volume 4: Heat Transfer, Parts A and B, 1657-1666, June 9–13, 2008
Publisher: American Society of Mechanical Engineers
Paper No: GT2008-51206
https://doi.org/10.1115/GT2008-51206
View Paper titled, Experimental Characterisation of the Stiffness and Leakage of a Prototype Leaf Seal for Turbine Applications
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Topics: Engineering prototypes, Experimental characterization, Leakage, Stiffness, Turbines, Clearances (Engineering), Damping, Design, Flow (Dynamics), Geometry