Sigmar L. K. Wittig

Articles in Scholarly Journals [Incomplete List]

  1. Modelling of shear-driven liquid wall films: effect of accelerated air flow on the film flow propagation
    Progress in Computational Fluid Dynamics, An International Journal, vol. 4, no. 3/4/5, p. 183, 2004
  2. Effect of Internal Coolant Crossflow on the Effectiveness of Shaped Film-Cooling Holes
    Journal of Turbomachinery, vol. 125, no. 3, p. 547, 2003
  3. Free-Stream Turbulence Effects on Film Cooling With Shaped Holes
    Journal of Turbomachinery, vol. 125, no. 1, p. 65, 2003
  4. Assessment of Various Film-Cooling Configurations Including Shaped and Compound Angle Holes Based on Large-Scale Experiments
    Journal of Turbomachinery, vol. 125, no. 1, p. 57, 2003
  5. Influence of Rub-Grooves on Labyrinth Seal Leakage
    Journal of Turbomachinery, vol. 125, no. 2, p. 387, 2003
  6. Droplet evaporation modeling by the distillation curve model: accounting for kerosene fuel and elevated pressures
    International Journal of Heat and Mass Transfer, vol. 46, no. 23, pp. 4403–4412, 2003
  7. Low-NOx Combustor Development pursued within the scope of the Engine 3E German national research program in a cooperative effort among engine Manufacturer MTU, University of Karlsruhe and DLR German Aerospace Research Center
    Aerospace Science and Technology, vol. 6, no. 7, pp. 531–544, 2002
  8. Flow, Turbulence and Combustion, vol. 69, no. 3/4, pp. 249–270, 2002
  9. Droplet Generation by Disintegration of Oil Films at the Rim of a Rotating Disk
    Journal of Engineering for Gas Turbines and Power, vol. 124, no. 1, p. 117, 2002
  10. Influence of a Honeycomb Facing on the Heat Transfer in a Stepped Labyrinth Seal
    Journal of Engineering for Gas Turbines and Power, vol. 124, no. 1, p. 133, 2002
  11. Influence of a Honeycomb Facing on the Flow Through a Stepped Labyrinth Seal
    Journal of Engineering for Gas Turbines and Power, vol. 124, no. 1, p. 140, 2002
  12. Discharge Coefficients of a Preswirl System in Secondary Air Systems
    Journal of Turbomachinery, vol. 124, no. 1, p. 119, 2002
  13. A Combined Eulerian and Lagrangian Method for Prediction of Evaporating Sprays
    Journal of Engineering for Gas Turbines and Power, vol. 124, no. 3, p. 481, 2002
  14. Droplet Entrainment From a Shear-Driven Liquid Wall Film in Inclined Ducts: Experimental Study and Correlation Comparison
    Journal of Engineering for Gas Turbines and Power, vol. 124, no. 4, p. 874, 2002
  15. Correlation of Film-Cooling Effectiveness From Thermographic Measurements at Enginelike Conditions
    Journal of Turbomachinery, vol. 124, no. 4, p. 686, 2002
  16. Heat Flux Reduction From Film Cooling and Correlation of Heat Transfer Coefficients From Thermographic Measurements at Enginelike Conditions
    Journal of Turbomachinery, vol. 124, no. 4, p. 699, 2002
  17. High-Resolution Measurements of Local Effectiveness From Discrete Hole Film Cooling
    Journal of Turbomachinery, vol. 123, no. 4, p. 758, 2001
  18. Evaluation of Advanced Two-Phase Flow and Combustion Models for Predicting Low Emission Combustors
    Journal of Engineering for Gas Turbines and Power, vol. 123, no. 4, p. 817, 2001
  19. Experimental Assessment of Fiber-Reinforced Ceramics for Combustor Walls
    Journal of Engineering for Gas Turbines and Power, vol. 123, no. 2, p. 271, 2001
  20. Combined “Fluorescence” LDV (FLDV) and PDA Technique for Non-ambiguous Two Phase Measurements Inside the Spray of a SI-Engine
    Particle & Particle Systems Characterization, vol. 18, no. 4, pp. 216–225, 2001
  21. High-Resolution Measurements of Local Heat Transfer Coefficients From Discrete Hole Film Cooling
    Journal of Turbomachinery, vol. 123, no. 4, p. 749, 2001
  22. Effect of Crossflows on the Discharge Coefficient of Film Cooling Holes With Varying Angles of Inclination and Orientation
    Journal of Turbomachinery, vol. 123, no. 4, p. 781, 2001
  23. Experimental and Numerical Investigation on the Evaporation of Shear-Driven Multicomponent Liquid Wall Films
    Journal of Engineering for Gas Turbines and Power, vol. 123, no. 3, p. 580, 2001
  24. Effects of Reynolds Number and Pressure Ratio on Leakage Loss and Heat Transfer in a Stepped Labyrinth Seal
    Journal of Turbomachinery, vol. 123, no. 4, p. 815, 2001
  25. Shock Wave–Film Cooling Interactions in Transonic Flows
    Journal of Turbomachinery, vol. 123, no. 4, p. 788, 2001
  26. Measurements of the growth and coagulation of soot particles in a high-pressure shock tube
    Combustion and Flame, vol. 120, no. 1-2, pp. 188–199, 2000
  27. Film-cooling holes with expanded exits: near-hole heat transfer coefficients
    International Journal of Heat and Fluid Flow, vol. 21, no. 2, pp. 146–155, 2000
  28. Internal Bearing Chamber Wall Heat Transfer as a Function of Operating Conditions and Chamber Geometry
    Journal of Engineering for Gas Turbines and Power, vol. 122, no. 2, p. 314, 2000
  29. Effect of Internal Coolant Crossflow Orientation on the Discharge Coefficient of Shaped Film-Cooling Holes
    Journal of Turbomachinery, vol. 122, no. 1, p. 146, 2000
  30. Numerical and Experimental Study of Unsteady Flow Field and Vibration in Radial Inflow Turbines
    Journal of Turbomachinery, vol. 122, no. 2, p. 247, 2000
  31. CFD analysis of spray propagation and evaporation including wall film formation and spray/film interactions
    International Journal of Heat and Fluid Flow, vol. 20, no. 5, pp. 520–529, 1999
  32. Droplet interaction with shear-driven liquid films: analysis of deposition and secondary droplet characteristics
    International Journal of Heat and Fluid Flow, vol. 20, no. 5, pp. 462–469, 1999
  33. Experimental and theoretical study of one- and two-component droplet vaporization in a high pressure environment
    International Journal of Heat and Mass Transfer, vol. 42, no. 14, pp. 2683–2694, 1999
  34. Heat up and evaporation of shear driven liquid wall films in hot turbulent air flow
    International Journal of Heat and Fluid Flow, vol. 19, no. 2, pp. 167–172, 1998
  35. Exploiting the flexibility of unstructured grids for computing complex flow patterns more precisely
    International Journal of Heat and Fluid Flow, vol. 19, no. 5, pp. 439–445, 1998
  36. Comparative Mass Flux Measurements in Sprays using a Patternator and the Phase-Doppler Technique
    Particle & Particle Systems Characterization, vol. 15, no. 2, pp. 81–89, 1998
  37. Tropfenverdunstung in Hochdruckatmosph?re
    Chemie Ingenieur Technik - CIT, vol. 69, no. 7, pp. 962–966, 1997
  38. DISC - an efficient method for the discretization of convection on unstructured grids
    Aerospace Science and Technology, vol. 1, no. 6, pp. 405–411, 1997
  39. Design of thermally high-loaded ceramic components for gas turbines
    Journal of the European Ceramic Society, vol. 17, no. 14, pp. 1655–1663, 1997
  40. A comparative study of pressure correction and block-implicit finite volume algorithms on parallel computers
    International Journal for Numerical Methods in Fluids, vol. 24, no. 11, pp. 1111–1128, 1997
  41. Soot Formation in a Shock Tube under Elevated Pressure Conditions
    Combustion Science and Technology, vol. 113, no. 1, pp. 67–80, 1996
  42. Multiple Wavelength Extinction Technique for Particle Characterization in Dense Particle Clouds
    Particle and Particle Systems Characterization, vol. 11, no. 5, pp. 379–384, 1994
  43. 32.O.04 Multiple wavelength extinction measurements in highly concentrated aerosols under industrial conditions
    Journal of Aerosol Science, vol. 25, pp. 565–566, 1994
  44. Experimental and numerical studies of evaporating wavy fuel films in turbulent air flow
    International Journal of Heat and Mass Transfer, vol. 37, no. 8, pp. 1217–1226, 1994
  45. Diffusion controlled evaporation of a multicomponent droplet: theoretical studies on the importance of variable liquid properties
    International Journal of Heat and Mass Transfer, vol. 36, no. 9, pp. 2403–2415, 1993
  46. Experimental Study of Coke Deposition under Gas Turbine Combustor Conditions
    Combustion Science and Technology, vol. 89, no. 1, pp. 265–273, 1993
  47. Experimentell gestütztes Kennzahlmodell zur Beschreibung des Betriebsverhaltens trockenlaufender Schrauben-Expansionsmaschinen in Kreisprozessen
    Forschung im Ingenieurwesen, vol. 58, no. 4, pp. 104–111, 1992
  48. GENERALIZED CONJUGATE GRADIENT METHOD FOR THE EFFICIENT SOLUTION OF THREE-DIMENSIONAL FLUID FLOW PROBLEMS
    Numerical Heat Transfer, Part B: Fundamentals, vol. 20, no. 2, pp. 207–221, 1991
  49. Flue gas cleaning by the electron-beam-process (I): Optimization of removal efficiency and energy consumption at the ITS-facility
    International Journal of Radiation Applications and Instrumentation. Part C. Radiation Physics and Chemistry, vol. 35, no. 1-3, pp. 422–426, 1990
  50. The performance characteristics of the Electron-Beam-Technique: Detailed studies at the (ITS) flue gas facility
    International Journal of Radiation Applications and Instrumentation. Part C. Radiation Physics and Chemistry, vol. 31, no. 1-3, pp. 83–93, 1988
  51. Droplet formation and growth in condensing binary vapours
    International Journal of Heat and Mass Transfer, vol. 27, no. 3, pp. 451–461, 1984
  52. Zur Beschreibung homogener un?rer und bin?rer Kondensationsvorg?nge
    W�rme- und Stoff�bertragung, vol. 17, no. 4, pp. 241–250, 1983
  53. Chemi-ionization in Shock-Induced Hydrocarbon Combustion I. Ion Concentrations in Methane/Air
    Combustion Science and Technology, vol. 7, no. 5, pp. 219–226, 1973
  54. The propagation of shock waves in gases with arbitrary property gradients
    Zeitschrift für angewandte Mathematik und Physik ZAMP, vol. 22, no. 4, pp. 654–664, 1971
  55. Industrial & Engineering Chemistry Process Design and Development, vol. 9, no. 4, pp. 605–608, 1970