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Proceedings Papers

Numerical Predictions and Measurements of Discharge Coefficients in Labyrinth Seals

S. Wittig, U. Schelling, S. Kim, K. Jacobsen
Proc. ASME. GT1987, Volume 1: Turbomachinery, V001T01A064, May 31–June 4, 1987
Publisher: American Society of Mechanical Engineers
Paper No: 87-GT-188
https://doi.org/10.1115/87-GT-188
View Paper titled, Numerical Predictions and Measurements of Discharge Coefficients in Labyrinth Seals
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Topics: Discharge coefficient, Pressure, Engines, Flow (Dynamics), Test facilities, Turbulence
Proceedings Papers

Evaporation of Fuel Droplets in Turbulent Combustor Flow

S. Wittig, W. Klausmann, B. Noll, J. Himmelsbach
Proc. ASME. GT1988, Volume 3: Coal, Biomass and Alternative Fuels; Combustion and Fuels; Oil and Gas Applications; Cycle Innovations, V003T06A012, June 6–9, 1988
Publisher: American Society of Mechanical Engineers
Paper No: 88-GT-107
https://doi.org/10.1115/88-GT-107
View Paper titled, Evaporation of Fuel Droplets in Turbulent Combustor Flow
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Topics: Combustion chambers, Drops, Evaporation, Flow (Dynamics), Fuels, Turbulence, Air flow, Heating, Ignition, Low temperature
Proceedings Papers

Effects of Free-Stream Turbulence and Wake Characteristics on the Heat Transfer Along a Cooled Gas Turbine Blade

S. Wittig, A. Schulz, K. Dullenkopf, J. Fairbank
Proc. ASME. GT1988, Volume 4: Heat Transfer; Electric Power; Industrial and Cogeneration, V004T09A030, June 6–9, 1988
Publisher: American Society of Mechanical Engineers
Paper No: 88-GT-179
https://doi.org/10.1115/88-GT-179
View Paper titled, Effects of Free-Stream Turbulence and Wake Characteristics on the Heat Transfer Along a Cooled Gas Turbine Blade
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Topics: Blades, Gas turbines, Heat transfer, Turbulence, Wakes, Cross-flow, Airfoils, Generators, Modeling, Unsteady flow
Proceedings Papers

The Influence of the Recirculation Region: A Comparison of the Convective Heat Transfer Downstream of a Backward-Facing Step and Behind a Jet in a Cross Flow

V. Scherer, S. Wittig
Proc. ASME. GT1989, Volume 5: Manufacturing Materials and Metallurgy; Ceramics; Structures and Dynamics; Controls, Diagnostics and Instrumentation; Education; General, V005T16A001, June 4–8, 1989
Publisher: American Society of Mechanical Engineers
Paper No: 89-GT-59
https://doi.org/10.1115/89-GT-59
View Paper titled, The Influence of the Recirculation Region: A Comparison of the Convective Heat Transfer Downstream of a Backward-Facing Step and Behind a Jet in a Cross Flow
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Topics: Convection, Cross-flow, Flow (Dynamics), Heat transfer, Finite volume methods, Laser Doppler anemometry, Momentum, Pressure, Reynolds number
Proceedings Papers

The Effect of Incident Wake Conditions on the Mean Heat Transfer of an Airfoil

K. Dullenkopf, A. Schulz, S. Wittig
Proc. ASME. GT1990, Volume 4: Heat Transfer; Electric Power; Industrial and Cogeneration, V004T09A023, June 11–14, 1990
Publisher: American Society of Mechanical Engineers
Paper No: 90-GT-121
https://doi.org/10.1115/90-GT-121
View Paper titled, The Effect of Incident Wake Conditions on the Mean Heat Transfer of an Airfoil
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Topics: Airfoils, Heat transfer, Wakes, Cascades (Fluid dynamics), Blades, Flow (Dynamics), Boundary layers, Cross-flow, Cylinders, Generators
Proceedings Papers

Design of Ceramic Gas Turbine Components

G. Stürmer, M. Fundus, A. Schulz, S. Wittig
Proc. ASME. GT1990, Volume 2: Aircraft Engine; Marine; Microturbines and Small Turbomachinery, V002T04A002, June 11–14, 1990
Publisher: American Society of Mechanical Engineers
Paper No: 90-GT-048
https://doi.org/10.1115/90-GT-048
View Paper titled, Design of Ceramic Gas Turbine Components
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Topics: Ceramics, Design, Gas turbines, Finite element analysis, Industrial ceramics, Combustion chambers, Fracture (Materials), Fracture (Process), Probability, Reliability
Proceedings Papers

Local Heat Transfer in Turbine Disk-Cavities: Part I — Rotor and Stator Cooling With Hub Injection of Coolant

R. S. Bunker, D. E. Metzger, S. Wittig
Proc. ASME. GT1990, Volume 4: Heat Transfer; Electric Power; Industrial and Cogeneration, V004T09A006, June 11–14, 1990
Publisher: American Society of Mechanical Engineers
Paper No: 90-GT-025
https://doi.org/10.1115/90-GT-025
View Paper titled, Local Heat Transfer in Turbine Disk-Cavities: Part I — Rotor and Stator Cooling With Hub Injection of Coolant
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Topics: Cavities, Coolants, Cooling, Disks, Heat transfer, Rotors, Stators, Turbines, Flow (Dynamics), Coatings
Proceedings Papers

Local Heat Transfer in Turbine Disk-Cavities: Part II — Rotor Cooling With Radial Location Injection of Coolant

R. S. Bunker, D. E. Metzger, S. Wittig
Proc. ASME. GT1990, Volume 4: Heat Transfer; Electric Power; Industrial and Cogeneration, V004T09A007, June 11–14, 1990
Publisher: American Society of Mechanical Engineers
Paper No: 90-GT-026
https://doi.org/10.1115/90-GT-026
View Paper titled, Local Heat Transfer in Turbine Disk-Cavities: Part II — Rotor Cooling With Radial Location Injection of Coolant
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Topics: Cavities, Coolants, Cooling, Disks, Heat transfer, Rotors, Turbines, Stators, Flow (Dynamics), Heat transfer coefficients
Proceedings Papers

Influence of High Rotational Speeds on the Heat Transfer and Discharge Coefficients in Labyrinth Seals

W. Waschka, S. Wittig, S. Kim
Proc. ASME. GT1990, Volume 4: Heat Transfer; Electric Power; Industrial and Cogeneration, V004T09A037, June 11–14, 1990
Publisher: American Society of Mechanical Engineers
Paper No: 90-GT-330
https://doi.org/10.1115/90-GT-330
View Paper titled, Influence of High Rotational Speeds on the Heat Transfer and Discharge Coefficients in Labyrinth Seals
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Topics: Discharge coefficient, Heat transfer, Heat transfer coefficients, Rotors, Test facilities, Clearances (Engineering), Compressible flow, Dimensions, Fins, Gages
Proceedings Papers

Motion and Evaporation of Shear-Driven Liquid Films in Turbulent Gases

S. Wittig, J. Himmelsbach, B. Noll, H. J. Feld, W. Samenfink
Proc. ASME. GT1991, Volume 3: Coal, Biomass and Alternative Fuels; Combustion and Fuels; Oil and Gas Applications; Cycle Innovations, V003T06A017, June 3–6, 1991
Publisher: American Society of Mechanical Engineers
Paper No: 91-GT-207
https://doi.org/10.1115/91-GT-207
View Paper titled, Motion and Evaporation of Shear-Driven Liquid Films in Turbulent Gases
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Topics: Evaporation, Gases, Liquid films, Shear (Mechanics), Turbulence, Flow (Dynamics), Optical instruments, Shear stress, Air flow, Combustion chambers
Proceedings Papers

Jets in a Crossflow: Effects of Hole Spacing to Diameter Ratio on the Spatial Distribution of Heat Transfer

V. Scherer, S. Wittig, K. Morad, N. Mikhael
Proc. ASME. GT1991, Volume 4: Heat Transfer; Electric Power; Industrial and Cogeneration, V004T09A030, June 3–6, 1991
Publisher: American Society of Mechanical Engineers
Paper No: 91-GT-356
https://doi.org/10.1115/91-GT-356
View Paper titled, Jets in a Crossflow: Effects of Hole Spacing to Diameter Ratio on the Spatial Distribution of Heat Transfer
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Topics: Heat transfer, Jets, Heat transfer coefficients, Momentum, Heat flux, Resolution (Optics), Temperature distribution
Proceedings Papers

Principles of the ITS Ceramic Research Combustor Design: Segmented Flame Tube and Staged Combustion

A. Pfeiffer, A. Schulz, S. Wittig
Proc. ASME. GT1991, Volume 5: Manufacturing Materials and Metallurgy; Ceramics; Structures and Dynamics; Controls, Diagnostics and Instrumentation; Education; IGTI Scholar Award; General, V005T18A001, June 3–6, 1991
Publisher: American Society of Mechanical Engineers
Paper No: 91-GT-063
https://doi.org/10.1115/91-GT-063
View Paper titled, Principles of the ITS Ceramic Research Combustor Design: Segmented Flame Tube and Staged Combustion
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Topics: Ceramics, Combustion, Combustion chambers, Design, Flames, Fuels, Industrial ceramics, Durability, Emissions, Engines
Proceedings Papers

In-Situ Soot Measurements in an Operating Engine Gas Turbine Combustor

R. Koch, S. Wittig, H.-J. Feld, H.-J. Mohr
Proc. ASME. GT1991, Volume 3: Coal, Biomass and Alternative Fuels; Combustion and Fuels; Oil and Gas Applications; Cycle Innovations, V003T06A016, June 3–6, 1991
Publisher: American Society of Mechanical Engineers
Paper No: 91-GT-177
https://doi.org/10.1115/91-GT-177
View Paper titled, In-Situ Soot Measurements in an Operating Engine Gas Turbine Combustor
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Topics: Combustion chambers, Engines, Gas turbines, Soot, Particulate matter, Density, Turbines, Absorption, Electromagnetic scattering, Flames
Proceedings Papers

Life Time Prediction for Ceramic Gas Turbine Components

G. Stürmer, A. Schulz, S. Wittig
Proc. ASME. GT1991, Volume 2: Aircraft Engine; Marine; Microturbines and Small Turbomachinery, V002T04A001, June 3–6, 1991
Publisher: American Society of Mechanical Engineers
Paper No: 91-GT-096
https://doi.org/10.1115/91-GT-096
View Paper titled, Life Time Prediction for Ceramic Gas Turbine Components
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Topics: Ceramics, Gas turbines, Failure, Fracture (Materials), Industrial ceramics, Probability, Stress, Combustion chambers, Computers, Event history analysis
Proceedings Papers

Effects of Variable Liquid Properties on Multicomponent Droplet Vaporization

R. Kneer, M. Schneider, B. Noll, S. Wittig
Proc. ASME. GT1992, Volume 3: Coal, Biomass and Alternative Fuels; Combustion and Fuels; Oil and Gas Applications; Cycle Innovations, V003T06A024, June 1–4, 1992
Publisher: American Society of Mechanical Engineers
Paper No: 92-GT-131
https://doi.org/10.1115/92-GT-131
View Paper titled, Effects of Variable Liquid Properties on Multicomponent Droplet Vaporization
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Topics: Drops, Temperature, Combustion, Diffusion (Physics), Heptane, Ignition, Temperature gradient, Vapors
Proceedings Papers

Computation of Turbulent Evaporating Sprays: Eulerian Versus Lagrangian Approach

M. Hallmann, M. Scheurlen, S. Wittig
Proc. ASME. GT1993, Volume 3B: General, V03BT16A089, May 24–27, 1993
Publisher: American Society of Mechanical Engineers
Paper No: 93-GT-333
https://doi.org/10.1115/93-GT-333
View Paper titled, Computation of Turbulent Evaporating Sprays: Eulerian Versus Lagrangian Approach
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Topics: Computation, Evaporation, Sprays, Turbulence, Drops, Heating, Temperature
Proceedings Papers

Influence of High Rotational Speeds on Heat Transfer and Oil Film Thickness in Aero Engine Bearing Chambers

S. Wittig, A. Glahn, J. Himmelsbach
Proc. ASME. GT1993, Volume 3A: General, V03AT15A060, May 24–27, 1993
Publisher: American Society of Mechanical Engineers
Paper No: 93-GT-209
https://doi.org/10.1115/93-GT-209
View Paper titled, Influence of High Rotational Speeds on Heat Transfer and Oil Film Thickness in Aero Engine Bearing Chambers
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Topics: Aircraft engines, Bearings, Film thickness, Heat transfer, Flow (Dynamics), Air flow, Engines, Finite element analysis, Lubrication, Sealing (Process)
Proceedings Papers

Film Cooling Effectiveness and Heat Transfer Coefficients for Slot Injection at High Blowing Ratios

G. Bittlinger, A. Schulz, S. Wittig
Proc. ASME. GT1994, Volume 4: Heat Transfer; Electric Power; Industrial and Cogeneration, V004T09A032, June 13–16, 1994
Publisher: American Society of Mechanical Engineers
Paper No: 94-GT-182
https://doi.org/10.1115/94-GT-182
View Paper titled, Film Cooling Effectiveness and Heat Transfer Coefficients for Slot Injection at High Blowing Ratios
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Topics: Film cooling, Heat transfer coefficients, Heat transfer, Databases, Combustion chambers, Computer simulation, Flow (Dynamics), Temperature profiles, Testing, Wall temperature
Proceedings Papers

Comparison of Calculated and Measured Heat Transfer Coefficients for Transonic and Supersonic Boundary-Layer Flows

C. Hürst, A. Schulz, S. Wittig
Proc. ASME. GT1994, Volume 4: Heat Transfer; Electric Power; Industrial and Cogeneration, V004T09A025, June 13–16, 1994
Publisher: American Society of Mechanical Engineers
Paper No: 94-GT-173
https://doi.org/10.1115/94-GT-173
View Paper titled, Comparison of Calculated and Measured Heat Transfer Coefficients for Transonic and Supersonic Boundary-Layer Flows
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Topics: Boundary layers, Flow (Dynamics), Heat transfer coefficients, Nozzles, Heat transfer, Reynolds number, Turbulence, Boundary-value problems, Compressibility, Coolants
Proceedings Papers

Spectral and Timeresolved Radiation Measurements in a Model Gas Turbine Combustor

R. Koch, W. Krebs, R. Jeckel, B. Ganz, S. Wittig
Proc. ASME. GT1994, Volume 3: Coal, Biomass and Alternative Fuels; Combustion and Fuels; Oil and Gas Applications; Cycle Innovations, V003T06A032, June 13–16, 1994
Publisher: American Society of Mechanical Engineers
Paper No: 94-GT-403
https://doi.org/10.1115/94-GT-403
View Paper titled, Spectral and Timeresolved Radiation Measurements in a Model Gas Turbine Combustor
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Topics: Combustion chambers, Gas turbines, Radiation (Physics), Turbulence, Computational fluid dynamics, Flow (Dynamics), Diffusion flames, Radiative heat transfer