Karlsruhe Institute of Technology (KIT) - Institute of Thermal Turbomachinery (ITS) Institute - Staff

Wittig

Prof. Dr.-Ing. Dr-Ing. E.h. Dr. h.c.mult. Sigmar Wittig

Office Hours: Nach Vereinbarung!
Room: Anmeldung im Sekretariat Zi. 115
Phone: +49 721 608 43247
Fax: +49 721 608 42767
sigmar wittig ∂does-not-exist.kit edu

Institut für Thermische Strömungsmaschinen
KIT, Campus Süd
Geb. 10.91
Kaiserstr. 12
D-76131 Karlsruhe

Publications
Title	Author	Source
Numerische Betrachtung der Karmanschen Wirbelstraße im Falle einer Zylinderumströmung (Wolfgang Heilmann-Preis der MTU)	Klostermeier, C. Burger, M. Wittig, S.	DGLR-Jahrbuch 2003, Vol. 1 und 2 DGLR-2003-157
DNS of Droplet-Vortex Interaction with a Karman Vortex Street	Burger,M. Schmehl,R. Koch,R. Bauer,H.-J. Wittig,S.	International Journal of Heat and Fluid Flow, Vol. 27, Page 181-191
Droplet Evaporation Modeling by the Distillation Curve Model - Accounting for Kerosene Fuel and Elevated Pressures	Burger, M. Schmehl, R. Prommersberger, K. Schäfer, O. Koch, R. Wittig, S.	International Journal of Heat and Mass Transfer, Vol. 46, 2003, Pages 4403-4412
Shape Optimization of a Labyrinth Seal Applying the Simulated Annealing Method	Schramm, V. Denecke, J. Kim, S. Wittig, S.	International Journal of Rotating Machinery, 2004, Vol. 10, No. 5, Page 365-371 ISROMAC-9, 2002
Flashback on Lean Prevaporized Premixed Combustion - Non-Swirling Turbulent Pipe Flow Study	Schäfer, O. Koch, R. Wittig, S.	Journal of Engineering for Gas Turbines and Power, Vol. 125, No. 3, July 2003, Page 670-676 ASME-Paper 2001-GT-053
Discharge Coefficients of Rotating Short Orifices With Radiused and Chamfered Inlets	Dittmann, M. Dullenkopf, K. Wittig, S.	Journal of Engineering for Gas Turbines and Power, Vol. 126, October 2004, Page 803-808 ASME-Paper GT-2003-38314
Direct-Transfer Preswirl System - A One Dimensional Modular Characterization of the Flow	Dittmann,M. Dullenkopf,K. Wittig,S.	Journal of Engineering for Gas Turbines and Power, Vol. 127, No. 2, April 2005, Page 383-388 ASME-Paper GT-2003-38312
Disintegration of Oil Jets Emerging from Radial Holes in a Rotating Cylinder	Glahn, A. Blair, M. F. Allard, K. L. Busam, S. Schäfer, O. Wittig, S.	Journal of Engineering for Gas Turbines and Power, Vol.125, October 2003, Page 1011-1020 ASME-Paper 2001-GT-202
Disintegration of Oil Jets Emerging from Axial Passages at the Face of a Rotating Cylinder	Glahn, A. Blair, M. F. Allard, K. L. Busam, S. Schäfer, O. Wittig, S.	Journal of Engineering for Gas Turbines and Power, Vol.125, October 2003, Pages 1003-1010 ASME-Paper 2001-GT-201
Free-Stream Turbulence Effects on Film Cooling With Shaped Holes	Saumweber, C. Schulz, A. Wittig, S.	Journal of Turbomachinery, Vol. 125, January 2003, Page 65-73 ASME-Paper 2002-GT-30170
Effect of Internal Coolant Crossflow on the Effectiveness of Shaped Film Cooling Holes	Gritsch, M. Schulz, A. Wittig, S.	Journal of Turbomachinery, Vol. 125, July 2003, Page 547-554
Influence of Rub-Grooves on Labyrinth Seal Leakage	Denecke, J. Schramm, V. Kim, S. Wittig, S.	Journal of Turbomachinery, Vol. 125, No. 2, April 2003, Page 387-393 ASME-Paper 2002-GT-30244
Surface Roughness Effects on External Heat Transfer on a HP Turbine Vane	Stripf, M. Schulz, A. Wittig, S.	Journal of Turbomachinery, Vol. 127, January 2005, Page 200-208 ASME-Paper GT2004-53114
Extended Models for Transitional Rough Wall Boundary Layers With Heat Transfer: Part I — Model Formulations	Stripf,M. Schulz,A. Bauer,H.-J. Wittig,S.	Journal of Turbomachinery, Vol. 131, July 2009, Page 031016-1-10 ASME-Paper GT2008-50494
Extended Models for Transitional Rough Wall Boundary Layers With Heat Transfer: Part II — Model Validation and Benchmarking	Stripf,M. Schulz,A. Bauer,H.-J. Wittig,S.	Journal of Turbomachinery, Vol. 131, July 2009, Page 031017-1-11 ASME-Paper GT2008-50495
Modelling of Shear-Driven Liquid Wall Films-Effect of Accelerated Air Flow on the Film Flow Propagation	Ebner,J. Schober,P. Schäfer,O. Koch,R. Wittig,S.	Progress in Computational Fluid Dynamics, 2004, Vol. 4, No. 3-5, Page 183-190
The Laminar Flame Speed of Aviation Fuel-Air Mixtures at Elevated Temperatures	Schäfer, O. Wittig, S.	VDI-Bericht 1750, 2003, Seite 419-428 21. Deutscher Flammentag, 2003


Title	Author	Chair
An Experimental Study on Droplet Generation in Bearing Chambers Caused by Roller Bearings	Gorse,P. Dullenkopf,K. Bauer,H.-J. Wittig,S.	ASME Turbo Expo 2008 Power for Land, Sea and Air ASME Paper GT2008-51281
Experimental Analysis of Air/Oil Separator Performance	Willenborg,K. Klingsporn,M. Tebby,S. Ratcliffe,T. Gorse,P. Dullenkopf,K. Wittig,S.	ASME Turbo Expo 2006 - Power for Land, Sea, and Air GT2006-90708
Experimental Investigation of the Total Temperature Increase and Swirl Development in Rotating Labyrinth Seals	Denecke,J. Dullenkopf,K. Wittig,S. Bauer,H.-J.	ASME Turbo Expo 2005 - Power for Land, Sea, and Air GT2005-68677
Experimental Investigation of the Two-Phase Flow Through a Leaking Bearing Chamber Labyrinth Seal	Willenborg,K. Au,J. Dullenkopf,K. Wittig,S.	17th International Symposium on Airbreathing Engines ISABE-2005-1207
The Influence of Unsteady Flow Conditions on Liquid Sheet Atomisation	Müller, A. Meier, R. Schäfer, O. Wittig, S.	DFG-Tagung - Atomization and Spray Processes
Influence of Preswirl and Rotation on Labyrinth Seal Leakage	Denecke, J. Dullenkopf, K. Wittig, S.	10th International Symposium on Transport Phenomena and Dynamics of Rotating Machinery, ISROMAC-10
Eigenfrequencies and Mode Shapes of Radial Turbine Blades: Single Blade Calculation Vs. Entire Calculation	Klaus, M. Schulz, A. Wittig, S.	10th International Symposium on Transport Phenomena and Dynamics of Rotating Machinery, ISROMAC-10
Experimental Study on the Effect of a Strong Negative Pressure Gradient on a Shear-Driven Liquid Fuel Film	Schober, P. Ebner, J. Schäfer, O. Wittig, S.	9th International Conference on Liquid Atomization and Spray Systems (ICLASS)
Wall Impact of Single Droplets under Conditions of DISI-Engines	Richter, B. Dullenkopf, K. Wittig, S.	9th International Conference on Liquid Atomization and Spray Systems (ICLASS)
Modeling of Shear-Driven Liquid Wall Films on Curved Surfaces - Effect on Accelerated Air Flow and Variable Film Load	Ebner, J. Schäfer, O. Schober, P. Wittig, S.	9th International Conference on Liquid Atomization and Spray Systems (ICLASS)
Numerical Study of Strouhal Instabilities in Two-Phase Flows	Burger, M. Schmehl, R. Schäfer, O. Koch, R. Wittig, S.	9th International Conference on Liquid Atomization and Spray Systems (ICLASS)
Emission Performance of a Micro Gas Turbine LPP-Combustor With Fuel Film Evaporation	Liedtke, O. Schulz, A. Wittig, S.	ASME Turbo Expo 2003 GT-2003-38697
Three-Dimensional Laser Doppler Anemometer(LDA) Measurements in an Aero-Engine Bearing Chamber	Gorse, P. Willenborg, K. Busam, S. Ebner, J. Dullenkopf, K. Wittig, S.	ASME Turbo Expo 2003 GT-2003-38376
Endoskopic PIV-Measurements in an Enclosed Rotor-Stator System with Pre-Swirled Cooling Air	Geis, T. Rottenkolber, G. Dittmann, M. Richter, B. Dullenkopf, K. Wittig, S.	11. International Symposium on Applications of Laser Techniques to Fluid Mechanics