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Proceedings Papers

A Numerical Study of Three-Dimensional Flow Separation and Wake Development in an Axial Compressor Rotor

C. Hah
Proc. ASME. GT1984, Volume 1: Turbomachinery, V001T01A011, June 4–7, 1984
Publisher: American Society of Mechanical Engineers
Paper No: 84-GT-34
https://doi.org/10.1115/84-GT-34
View Paper titled, A Numerical Study of Three-Dimensional Flow Separation and Wake Development in an Axial Compressor Rotor
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Topics: Compressors, Flow separation, Rotors, Wakes, Turbulence, Viscous flow, Algebra, Computers, Design, Navier-Stokes equations
Proceedings Papers

Numerical Solution of Three-Dimensional Turbulent Flows for Modern Gas Turbine Components

C. Hah, J. H. Leylek
Proc. ASME. GT1987, Volume 1: Turbomachinery, V001T01A026, May 31–June 4, 1987
Publisher: American Society of Mechanical Engineers
Paper No: 87-GT-84
https://doi.org/10.1115/87-GT-84
View Paper titled, Numerical Solution of Three-Dimensional Turbulent Flows for Modern Gas Turbine Components
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Topics: Gas turbines, Turbulence, Engineering design processes, Compressible flow, Computers, Convection, Navier-Stokes equations, Relaxation (Physics), Reynolds number, Turbine blades
Proceedings Papers

Secondary Flows and Vortex Motion in a High-Efficiency Backswept Impeller at Design and Off-Design Conditions

C. Hah, H. Krain
Proc. ASME. GT1989, Volume 1: Turbomachinery, V001T01A074, June 4–8, 1989
Publisher: American Society of Mechanical Engineers
Paper No: 89-GT-181
https://doi.org/10.1115/89-GT-181
View Paper titled, Secondary Flows and Vortex Motion in a High-Efficiency Backswept Impeller at Design and Off-Design Conditions
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Topics: Design, Flow (Dynamics), Impellers, Vortex motion, Clearances (Engineering), Rotors, Computer-aided design, Laser velocimetry, Pressure, Shapes
Proceedings Papers

Experimental and Numerical Investigation of Three-Dimensional Viscous Flows and Vortex Motion Inside an Annular Compressor Blade Row

H. E. Gallus, C. Hah, H. D. Schulz
Proc. ASME. GT1990, Volume 1: Turbomachinery, V001T01A051, June 11–14, 1990
Publisher: American Society of Mechanical Engineers
Paper No: 90-GT-155
https://doi.org/10.1115/90-GT-155
View Paper titled, Experimental and Numerical Investigation of Three-Dimensional Viscous Flows and Vortex Motion Inside an Annular Compressor Blade Row
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Topics: Blades, Compressors, Flow (Dynamics), Vortex motion, Boundary layers, Cascades (Fluid dynamics), Corners (Structural elements), Flow visualization, Navier-Stokes equations, Numerical analysis
Proceedings Papers

Three-Dimensional Flowfields Inside a Transonic Compressor With Swept Blades

C. Hah, A. J. Wennerstrom
Proc. ASME. GT1990, Volume 1: Turbomachinery, V001T01A107, June 11–14, 1990
Publisher: American Society of Mechanical Engineers
Paper No: 90-GT-359
https://doi.org/10.1115/90-GT-359
View Paper titled, Three-Dimensional Flowfields Inside a Transonic Compressor With Swept Blades
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Topics: Blades, Compressors, Rotors, Flow (Dynamics), Shock (Mechanics), Turbulence, Clearances (Engineering), Modeling, Navier-Stokes equations, Relaxation (Physics)
Proceedings Papers

Turbine Tip and Shroud Heat Transfer

D. E. Metzger, M. G. Dunn, C. Hah
Proc. ASME. GT1990, Volume 4: Heat Transfer; Electric Power; Industrial and Cogeneration, V004T09A040, June 11–14, 1990
Publisher: American Society of Mechanical Engineers
Paper No: 90-GT-333
https://doi.org/10.1115/90-GT-333
View Paper titled, Turbine Tip and Shroud Heat Transfer
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Topics: Heat transfer, Turbines, Blades, Leakage flows, Clearances (Engineering), Pressure, Flow (Dynamics), Airfoils, Computation, Cooling
Proceedings Papers

Endwall and Unsteady Flow Phenomena in an Axial Turbine Stage

H. E. Gallus, J. Zeschky, C. Hah
Proc. ASME. GT1994, Volume 1: Turbomachinery, V001T01A053, June 13–16, 1994
Publisher: American Society of Mechanical Engineers
Paper No: 94-GT-143
https://doi.org/10.1115/94-GT-143
View Paper titled, Endwall and Unsteady Flow Phenomena in an Axial Turbine Stage
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Topics: Turbines, Unsteady flow, Flow (Dynamics), Blades, Rotors, Probes, Wire, Axial flow, Design, Numerical analysis
Proceedings Papers

Tip Flow Fields in a Low Aspect Ratio Transonic Compressor

P. Russler, D. Rabe, B. Cybyk, C. Hah
Proc. ASME. GT1995, Volume 1: Turbomachinery, V001T01A018, June 5–8, 1995
Publisher: American Society of Mechanical Engineers
Paper No: 95-GT-089
https://doi.org/10.1115/95-GT-089
View Paper titled, Tip Flow Fields in a Low Aspect Ratio Transonic Compressor
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Topics: Compressors, Flow (Dynamics), Blades, Lasers, Pressure, Shock waves, Algorithms, Data acquisition, Leakage, Pressure transducers
Proceedings Papers

Control of Shock Structure and Secondary Flow Field Inside Transonic Compressor Rotors Through Aerodynamic Sweep

C. Hah, S. L. Puterbaugh, A. R. Wadia
Proc. ASME. GT1998, Volume 1: Turbomachinery, V001T01A132, June 2–5, 1998
Publisher: American Society of Mechanical Engineers
Paper No: 98-GT-561
https://doi.org/10.1115/98-GT-561
View Paper titled, Control of Shock Structure and Secondary Flow Field Inside Transonic Compressor Rotors Through Aerodynamic Sweep
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Topics: Compressors, Flow (Dynamics), Rotors, Shock (Mechanics), Design, Numerical analysis, Blades, Fluids, Momentum, Navier-Stokes equations
Proceedings Papers

Numerical and Experimental Investigation of Low Reynolds Number Effects on Laminar Flow Separation and Transition in a Cascade of Compressor Blades

Shunji Enomoto, C. Hah, G. V. Hobson
Proc. ASME. GT2000, Volume 3: Heat Transfer; Electric Power; Industrial and Cogeneration, V003T01A080, May 8–11, 2000
Publisher: American Society of Mechanical Engineers
Paper No: 2000-GT-0276
https://doi.org/10.1115/2000-GT-0276
View Paper titled, Numerical and Experimental Investigation of Low Reynolds Number Effects on Laminar Flow Separation and Transition in a Cascade of Compressor Blades
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Topics: Blades, Cascades (Fluid dynamics), Compressors, Laminar flow, Reynolds number, Separation (Technology), Flow (Dynamics), Flow separation, Diffusion (Physics), Eddies (Fluid dynamics)
Proceedings Papers

Application of Casing Circumferential Grooves for Improved Stall Margin in a Transonic Axial Compressor

D. C. Rabe, C. Hah
Proc. ASME. GT2002, Volume 5: Turbo Expo 2002, Parts A and B, 1141-1153, June 3–6, 2002
Publisher: American Society of Mechanical Engineers
Paper No: GT2002-30641
https://doi.org/10.1115/GT2002-30641
View Paper titled, Application of Casing Circumferential Grooves for Improved Stall Margin in a Transonic Axial Compressor
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Topics: Compressors, Flow (Dynamics), Boundary layers, Pressure, Steady state
Journal Articles

Closure to “Discussion of ‘An Experimental and Numerical Investigation into the Mechanisms of Rotating Instability’ ” (2002, ASME J. Turbomach., 124 )

J. Maerz, C. Hah, W. Neise
Journal: Journal of Turbomachinery
Publisher: ASME
Article Type: Technical Papers
J. Turbomach. July 2002, 124(3): 375.
https://doi.org/10.1115/1.1460917
Published Online: July 10, 2002
View Article titled, Closure to “Discussion of ‘An Experimental and Numerical Investigation into the Mechanisms of Rotating Instability’ ” (2002, ASME J. Turbomach., 124 )
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Topics: Flow (Dynamics), Flow instability, Aerodynamics, Gas turbines, Rotational flow
Journal Articles

Development of Hub Corner Stall and Its Influence on the Performance of Axial Compressor Blade Rows

C. Hah, J. Loellbach
Journal: Journal of Turbomachinery
Publisher: ASME
Article Type: Research Papers
J. Turbomach. January 1999, 121(1): 67–77.
https://doi.org/10.1115/1.2841235
Published Online: January 1, 1999
View Article titled, Development of Hub Corner Stall and Its Influence on the Performance of Axial Compressor Blade Rows
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Topics: Blades, Compressors, Corners (Structural elements), Vortices, Rotors, Suction, Flow (Dynamics), Fluids, Stators, Boundary layers
Journal Articles

Effects of Inlet Distortion on the Flow Field in a Transonic Compressor Rotor

C. Hah, D. C. Rabe, T. J. Sullivan, A. R. Wadia
Journal: Journal of Turbomachinery
Publisher: ASME
Article Type: Research Papers
J. Turbomach. April 1998, 120(2): 233–246.
https://doi.org/10.1115/1.2841398
Published Online: April 1, 1998
View Article titled, Effects of Inlet Distortion on the Flow Field in a Transonic Compressor Rotor
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Topics: Compressors, Flow (Dynamics), Rotors, Blades, Pressure, Shock (Mechanics), Boundary layers, Viscous flow, Boundary-value problems, Chords (Trusses)
Journal Articles

A Three-Dimensional Shock Loss Model Applied to an Aft-Swept, Transonic Compressor Rotor

S. L. Puterbaugh, W. W. Copenhaver, C. Hah, A. J. Wennerstrom
Journal: Journal of Turbomachinery
Publisher: ASME
Article Type: Research Papers
J. Turbomach. July 1997, 119(3): 452–459.
https://doi.org/10.1115/1.2841144
Published Online: July 1, 1997
View Article titled, A Three-Dimensional Shock Loss Model Applied to an Aft-Swept, Transonic Compressor Rotor
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Topics: Compressors, Rotors, Shock (Mechanics), Design, Flow (Dynamics), Geometry, Pressure, Airfoils, Design methodology
Journal Articles

Flow Analyses in a Single-Stage Propulsion Pump

Y. T. Lee, C. Hah, J. Loellbach
Journal: Journal of Turbomachinery
Publisher: ASME
Article Type: Research Papers
J. Turbomach. April 1996, 118(2): 240–248.
https://doi.org/10.1115/1.2836631
Published Online: April 1, 1996
View Article titled, Flow Analyses in a Single-Stage Propulsion Pump
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Topics: Flow (Dynamics), Propulsion, Pumps, Turbulence, Rotors, Blades, Boundary layers, Eddies (Fluid dynamics), Numerical analysis, Stators
Journal Articles

Closure to “Discussion of ‘Flow Analyses in a Single-stage Propulsion Pump’” (1996, ASME J. Turbomach., 118, p. 248)

Y. T. Lee, C. Hah, J. Loellbach
Journal: Journal of Turbomachinery
Publisher: ASME
Article Type: Discussions
J. Turbomach. April 1996, 118(2): 248–249.
https://doi.org/10.1115/1.2836633
Published Online: April 1, 1996
View Article titled, Closure to “Discussion of ‘Flow Analyses in a Single-stage Propulsion Pump’” (1996, ASME J. Turbomach., 118, p. 248)
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Topics: Flow (Dynamics), Propulsion
Journal Articles

The Effect of Tip Clearance on a Swept Transonic Compressor Rotor

W. W. Copenhaver, E. R. Mayhew, C. Hah, A. R. Wadia
Journal: Journal of Turbomachinery
Publisher: ASME
Article Type: Research Papers
J. Turbomach. April 1996, 118(2): 230–239.
https://doi.org/10.1115/1.2836630
Published Online: April 1, 1996
View Article titled, The Effect of Tip Clearance on a Swept Transonic Compressor Rotor
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Topics: Clearances (Engineering), Compressors, Rotors, Flow (Dynamics), Shock (Mechanics), Blades, Aerodynamics, Chords (Trusses), Modeling, Numerical analysis
Journal Articles

Endwall and Unsteady Flow Phenomena in an Axial Turbine Stage

H. E. Gallus, J. Zeschky, C. Hah
Journal: Journal of Turbomachinery
Publisher: ASME
Article Type: Research Papers
J. Turbomach. October 1995, 117(4): 562–570.
https://doi.org/10.1115/1.2836568
Published Online: October 1, 1995
View Article titled, Endwall and Unsteady Flow Phenomena in an Axial Turbine Stage
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Topics: Turbines, Unsteady flow, Flow (Dynamics), Blades, Rotors, Probes, Wire, Axial flow, Design, Numerical analysis
Journal Articles

Three-Dimensional Flow Phenomena in a Transonic, High-Throughflow, Axial-Flow Compressor Stage

W. W. Copenhaver, C. Hah, S. L. Puterbaugh
Journal: Journal of Turbomachinery
Publisher: ASME
Article Type: Research Papers
J. Turbomach. April 1993, 115(2): 240–248.
https://doi.org/10.1115/1.2929228
Published Online: April 1, 1993
View Article titled, Three-Dimensional Flow Phenomena in a Transonic, High-Throughflow, Axial-Flow Compressor Stage
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Topics: Axial flow, Compressors, Flow (Dynamics), Rotors, Stators, Viscous flow, Blades, Pressure transducers, Probes