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Sigmar Wittig
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Proceedings Papers

Development and Optimization of Advanced Atomizers for Application in Premix Ducts

Georg Maier, Michael Willmann, Sigmar Wittig
Proc. ASME. GT1997, Volume 2: Coal, Biomass and Alternative Fuels; Combustion and Fuels; Oil and Gas Applications; Cycle Innovations, V002T06A001, June 2–5, 1997
Publisher: American Society of Mechanical Engineers
Paper No: 97-GT-056
https://doi.org/10.1115/97-GT-056
View Paper titled, Development and Optimization of Advanced Atomizers for Application in Premix Ducts
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Topics: Ducts, Optimization, Flow (Dynamics), Combustion, Drops, Gas turbines, Nozzles, Design, Emissions, Fuels
Proceedings Papers

Experimental and Theoretical Study of Droplet Vaporization in a High Pressure Environment

Jörg Stengele, Michael Willmann, Sigmar Wittig
Proc. ASME. GT1997, Volume 2: Coal, Biomass and Alternative Fuels; Combustion and Fuels; Oil and Gas Applications; Cycle Innovations, V002T06A022, June 2–5, 1997
Publisher: American Society of Mechanical Engineers
Paper No: 97-GT-151
https://doi.org/10.1115/97-GT-151
View Paper titled, Experimental and Theoretical Study of Droplet Vaporization in a High Pressure Environment
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Topics: Drops, High pressure (Physics), Evaporation, Temperature, Gas turbines, Heat conduction, Pressure, Combustion chambers, Design, Fibers
Proceedings Papers

Computation of Two-Phase Flows in Low-NO x Combustor Premix Ducts Utilizing Fuel Film Evaporation

Heiko Rosskamp, Michael Willmann, Sigmar Wittig
Proc. ASME. GT1997, Volume 2: Coal, Biomass and Alternative Fuels; Combustion and Fuels; Oil and Gas Applications; Cycle Innovations, V002T06A032, June 2–5, 1997
Publisher: American Society of Mechanical Engineers
Paper No: 97-GT-226
https://doi.org/10.1115/97-GT-226
View Paper titled, Computation of Two-Phase Flows in Low-NO x Combustor Premix Ducts Utilizing Fuel Film Evaporation
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Topics: Combustion chambers, Computation, Ducts, Evaporation, Fuels, Two-phase flow, Flow (Dynamics), Aircraft, Boundary layers, Coke
Proceedings Papers

Validation of Numerical Methods at a Confined Turbulent Natural Gas Diffusion Flame Considering Detailed Radiative Transfer

Benedikt Ganz, Peter Schmittel, Rainer Koch, Sigmar Wittig
Proc. ASME. GT1998, Volume 3: Coal, Biomass and Alternative Fuels; Combustion and Fuels; Oil and Gas Applications; Cycle Innovations, V003T06A014, June 2–5, 1998
Publisher: American Society of Mechanical Engineers
Paper No: 98-GT-228
https://doi.org/10.1115/98-GT-228
View Paper titled, Validation of Numerical Methods at a Confined Turbulent Natural Gas Diffusion Flame Considering Detailed Radiative Transfer
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Topics: Diffusion flames, Natural gas, Numerical analysis, Radiative heat transfer, Turbulence, Flow (Dynamics), Temperature, Combustion chambers, Radiation (Physics), Flames
Proceedings Papers

Correlations of the Convective Heat Transfer in Annular Channels With Rotating Inner Cylinder

Ralf Jakoby, Soksik Kim, Sigmar Wittig
Proc. ASME. GT1998, Volume 4: Heat Transfer; Electric Power; Industrial and Cogeneration, V004T09A016, June 2–5, 1998
Publisher: American Society of Mechanical Engineers
Paper No: 98-GT-097
https://doi.org/10.1115/98-GT-097
View Paper titled, Correlations of the Convective Heat Transfer in Annular Channels With Rotating Inner Cylinder
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Topics: Convection, Cylinders, Flow (Dynamics), Vortices, Heat transfer, Rotation, Stability, Axial flow, Channel flow, Cooling
Proceedings Papers

Effect of the Shear Driven Liquid Wall Film on the Performance of Prefilming Airblast Atomizers

Heiko Rosskamp, Michael Willmann, Jürgen Meisl, Robert Meier, Georg Maier, Sigmar Wittig
Proc. ASME. GT1998, Volume 3: Coal, Biomass and Alternative Fuels; Combustion and Fuels; Oil and Gas Applications; Cycle Innovations, V003T06A046, June 2–5, 1998
Publisher: American Society of Mechanical Engineers
Paper No: 98-GT-500
https://doi.org/10.1115/98-GT-500
View Paper titled, Effect of the Shear Driven Liquid Wall Film on the Performance of Prefilming Airblast Atomizers
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Topics: Aerodynamics, Air flow, Combustion chambers, Computer simulation, Computers, Design, Drops, Emissions, Film flow, Flow (Dynamics)
Proceedings Papers

Internal Bearing Chamber Wall Heat Transfer as a Function of Operating Conditions and Chamber Geometry

Stefan Busam, Axel Glahn, Sigmar Wittig
Proc. ASME. GT1999, Volume 3: Heat Transfer; Electric Power; Industrial and Cogeneration, V003T01A067, June 7–10, 1999
Publisher: American Society of Mechanical Engineers
Paper No: 99-GT-249
https://doi.org/10.1115/99-GT-249
View Paper titled, Internal Bearing Chamber Wall Heat Transfer as a Function of Operating Conditions and Chamber Geometry
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Topics: Bearings, Geometry, Heat transfer, Heat, Aircraft engines, Engines, Fire, Flow (Dynamics), Friction, Heat transfer coefficients
Proceedings Papers

Effect of Internal Coolant Crossflow Orientation on the Discharge Coefficient of Shaped Film Cooling Holes

Michael Gritsch, Christian Saumweber, Achmed Schulz, Sigmar Wittig, Edwin Sharp
Proc. ASME. GT1999, Volume 3: Heat Transfer; Electric Power; Industrial and Cogeneration, V003T01A014, June 7–10, 1999
Publisher: American Society of Mechanical Engineers
Paper No: 99-GT-040
https://doi.org/10.1115/99-GT-040
View Paper titled, Effect of Internal Coolant Crossflow Orientation on the Discharge Coefficient of Shaped Film Cooling Holes
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Topics: Coolants, Discharge coefficient, Film cooling, Flow (Dynamics), Mach number, Diffusers, Engines, Geometry, Pressure
Proceedings Papers

The Superposition Approach to Local Heat Transfer Coefficients in High Density Ratio Film Cooling Flows

Michael Gritsch, Stefan Baldauf, Moritz Martiny, Achmed Schulz, Sigmar Wittig
Proc. ASME. GT1999, Volume 3: Heat Transfer; Electric Power; Industrial and Cogeneration, V003T01A048, June 7–10, 1999
Publisher: American Society of Mechanical Engineers
Paper No: 99-GT-168
https://doi.org/10.1115/99-GT-168
View Paper titled, The Superposition Approach to Local Heat Transfer Coefficients in High Density Ratio Film Cooling Flows
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Topics: Density, Film cooling, Flow (Dynamics), Heat transfer coefficients, Coolants, Temperature, Boundary layers, Differential equations
Proceedings Papers

Effect of Crossflows on the Discharge Coefficient of Film Cooling Holes With Varying Angles of Inclination and Orientation

Michael Gritsch, Achmed Schulz, Sigmar Wittig
Proc. ASME. GT2001, Volume 3: Heat Transfer; Electric Power; Industrial and Cogeneration, V003T01A020, June 4–7, 2001
Publisher: American Society of Mechanical Engineers
Paper No: 2001-GT-0134
https://doi.org/10.1115/2001-GT-0134
View Paper titled, Effect of Crossflows on the Discharge Coefficient of Film Cooling Holes With Varying Angles of Inclination and Orientation
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Topics: Discharge coefficient, Film cooling, Cooling, Engines, Geometry, Mach number, Pressure
Proceedings Papers

Free-Stream Turbulence Effects on Film Cooling With Shaped Holes

Christian Saumweber, Achmed Schulz, Sigmar Wittig
Proc. ASME. GT2002, Volume 3: Turbo Expo 2002, Parts A and B, 41-49, June 3–6, 2002
Publisher: American Society of Mechanical Engineers
Paper No: GT2002-30170
https://doi.org/10.1115/GT2002-30170
View Paper titled, Free-Stream Turbulence Effects on Film Cooling With Shaped Holes
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Topics: Film cooling, Turbulence, Density, Engines, Heat transfer coefficients, Mach number, Temperature
Journal Articles

Effect of Internal Coolant Crossflow on the Effectiveness of Shaped Film-Cooling Holes

Michael Gritsch, Achmed Schulz, Sigmar Wittig
Journal: Journal of Turbomachinery
Publisher: ASME
Article Type: Technical Papers
J. Turbomach. July 2003, 125(3): 547–554.
https://doi.org/10.1115/1.1580523
Published Online: August 27, 2003
View Article titled, Effect of Internal Coolant Crossflow on the Effectiveness of Shaped Film-Cooling Holes
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Topics: Coolants, Film cooling, Mach number, Flow (Dynamics)
Journal Articles

Free-Stream Turbulence Effects on Film Cooling With Shaped Holes

Christian Saumweber, Achmed Schulz, Sigmar Wittig
Journal: Journal of Turbomachinery
Publisher: ASME
Article Type: Technical Papers
J. Turbomach. January 2003, 125(1): 65–73.
https://doi.org/10.1115/1.1515336
Published Online: January 23, 2003
View Article titled, Free-Stream Turbulence Effects on Film Cooling With Shaped Holes
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Topics: Film cooling, Turbulence, Heat transfer coefficients, Density
Journal Articles

Effect of Crossflows on the Discharge Coefficient of Film Cooling Holes With Varying Angles of Inclination and Orientation

Michael Gritsch, Achmed Schulz, Sigmar Wittig
Journal: Journal of Turbomachinery
Publisher: ASME
Article Type: Technical Papers
J. Turbomach. October 2001, 123(4): 781–787.
https://doi.org/10.1115/1.1397306
Published Online: February 1, 2001
View Article titled, Effect of Crossflows on the Discharge Coefficient of Film Cooling Holes With Varying Angles of Inclination and Orientation
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Topics: Discharge coefficient, Film cooling, Mach number, Pressure, Flow (Dynamics)
Journal Articles

Internal Bearing Chamber Wall Heat Transfer as a Function of Operating Conditions and Chamber Geometry

Stefan Busam, Axel Glahn, Sigmar Wittig
Journal: Journal of Engineering for Gas Turbines and Power
Publisher: ASME
Article Type: Technical Papers
J. Eng. Gas Turbines Power. April 2000, 122(2): 314–320.
https://doi.org/10.1115/1.483209
Published Online: January 3, 2000
View Article titled, Internal Bearing Chamber Wall Heat Transfer as a Function of Operating Conditions and Chamber Geometry
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Topics: Bearings, Flow (Dynamics), Heat transfer, Heat transfer coefficients, Lubrication, Geometry