Education:
Studies of physics at the University of Bonn (1987 - 1993), minor subject Theoretical Chemistry (Computational Simulation of Molecules)

Dissertation:
1999, Ruhr-University Bochum

Carrier:
Sep. 1993 - Aug. 2001  Research associate Institute of Propulsion Technology, DLR Cologne, Section Engine Measurement Techniques

Apr. 1997 - Okt. 1997  Stay abroad at ONERA in Palaiseau near Paris

Sep. 2001 - Juli. 2003  Member of the Staff of DLR Staff of DLR's board of directors, Strategy development, DLR Cologne

2003 - 2008  Research associate (group leader) Institute of Propulsion Technology in Berlin-Charlottenburg, Section Engine Acoustics

since July 2008  Head of Turbine department (Göttingen), DLR, Institute of Propulsion Technology

April 2009  Professor of Aerothermodynamics of Turbine at Leibniz University Hannover linked with management of Turbine department in Göttingen 

Scientific Interests:
Aerothermodynamics of Turbine, Acoustics of Combustion Chamber, Thermo Acoustics, Liners, Combustion Noise, Laser-Diagnostics

Awards:
Pratt & Whitney Award 2001

Innovation Award 2004 of the Club of Friends of DLR

Patents (also internationally panding):

1. Vorrichtung und Verfahren zur Dämpfung thermoakustischer Resonanzen in Brennkammern, 10 2005 059 184.
2. Vorrichtung und Verfahren zur Verbesserung der Dämpfung von akustischen Wellen, 10 2007 032 600.0 (2007 eingereicht).
3. Verfahren zur Messung von Strömungsvektoren in Gasströmungen, P 44 43 069.
4. Korrekturverfahren für das Doppler-Global-Velocimetry-Geschwindigkeitsmessverfahren zur Bestimmung der Geschwindigkeit von Partikeln, 10 2006 015 894.

Publications:

Journal articles and articles in books

1. I. Roehle: "Three Dimensional Doppler Global Velocimetry in the Flow of a Fuel Spray Nozzle and in the Wake Region of a Car", Journal: Flow Measurement and Instrumentation, Elsevier Science Ltd, Oxford, 1996.
2. I. Röhle, C. Fradin, A. Le Guével: "Tracer based Shock Visualisation in a Transonic Compressor", Journal: Optics & Laser Technology, Volume 31, Number 1, February 1999, Elsevier Science Ltd, Oxford.
3. I. Roehle, C. Willert, M. Fischer, J. Heinze: "Extension of Doppler Global Velocimetry to periodic flows", Journal: Measurement, Science & Technology, Institute of Physics Publishing, p. 420 – 431, Vol. 12, No 4, April 2001.
4. R. Schodl, I. Roehle, C. Willert, T. Schilling, et al.: "Doppler Global Velocimetry for the Analysis of Combustor Flows", Journal, Aerospace Science and Technology (6), Elsevier Science Ltd, Oxford, 2002.
5. I. Röhle, P. Voigt, R. Schodl, C. Willert: "Recent developments and applications of quantitative planar measuring techniques in turbomachinery components", Journal: Measurement, Science & Technology, Institute of Physics Publishing, Volume 11, p. 1023-1035, 2000. 
6. R. Schodl, W. Forster, G. Karpinsky, I. Rohle: “3-Component-Doppler-laser-two-focus velocimetry applied to a transonic centrifugal compressor”, Book, Laser Techniques for Fluid Mechanics: Selected Papers from the 10th International Symposium on Applications of Laser Techniques to Fluid Mechanics, ISBN 3-540-42837-2, Herausgeber: Ronald J. Adrian, Springer, 566 Seiten, Veröffentlicht 2002.
7. Flemming, F.; Olbricht, C.; Wegner, B.; Sadiki, A.; Janicka, J.; Bake, F.; Michel, U.; Lehmann, B.; and Röhle, I.: 2005: Analysis of Unsteady Motion with Respect to Noise Sources in a Gas Turbine Combustor: Isothermal Flow Case. Journal of Flow, Turbulence and Combustion, Vol. 75, No. 1-4, pp. 3-27.
8. F. Bake, U. Michel, I. Röhle: “Investigation of Entropy Noise in Aero-Engine Combustors”, Journal of Engineering for Gas Turbines and Power, Vol. 129, p. 370-376, April 2007.
9. Bake, F.; Kings, N.; Röhle, I. (2008): Fundamental Mechanism of Entropy Noise in Aero-Engines: Experimental Investigation. Journal of Engineering for Gas Turbines and Power, Vol. 130 (No. 1), pp. 011202-1 - 011202-6
10. Fischer, A.; Bake, F.; Heinze, J.; Diers, O.; Willert, C.; Röhle, I. (2008): Off-line phase averaged PIV and OH-chemiluminescence measurements using acoustic time series. Measurement Science and Technology
11. Konle, H. J.; Rausch, A.; Fischer, A.; Doll, U.; Willert, C.; Pascheriet, C. O.; Röhle, I. (2008): Development of optical measurement techniques for thermo-acoustic diagnostics: Fibre-Optic Microphone, Rayleigh-Scattering and Acoustic PIV. The International Journal of Spray and Combustion Dynamics, Multi-Science Publishing Co., UK.
12. Bake, F.; Kings, N.; Fischer, A.; Röhle, I. (2009): Experimental Investigation of the Entropy Noise Mechanism in Aero-Enginges. International Journal of Aeroacoustics
13. F. Bake, C. Richter, B.Mühlbauer, N. Kings, I. Röhle, F. Thiele, B. Noll (2009): The Entropy Wave Generator (EWG): A Reference Case on Entropy Noise, Journal of Sound and Vibration, 326 , pp. 574-598. DOI: 10.1016/j.jsv.2009.05.018..
14. Bake, F. und Fischer, A. und Kings, N. und Röhle, I. (2009) Investigation of the Correlation of Entropy Waves and Acoustic Emission in Combustion Chambers. In: Combustion Noise, Springer Berlin Heidelberg , pp. 125-146. ISBN 978-3-642-02037-7.
15. Bake, F. und Kings, N. und Fischer, A. und Röhle, I. (2009) Indirect Combustion Noise: Investigations by the Acceleration of Flow Inhomogeneities. Acta Acustica united with Acustica , Vol. 95 (No. 3) , pp. 461-469.
16. C. Heuwinkel, B. Pardowitz, F. Bake, I. Röhle, L. Enghardt (2010):  On the Excitation of a Zero Mass Flow Liner for Acoustic Damping, AIAA-Journal, recommended for publication, Manuscript ID 2010-01-J050421.R1.
17. Konle, H. J. und Röhle, I. und Paschereit, C. O. (2009) A Fibre Optical Microphone Based on a Fabry-Perot Interferometer Applied for Thermo-acoustic Measurements. Meaurement Science and Technology , 21 (Issue 1) . IOP . ISSN 0957-0233; 1361-6501.
18. H.J. Konle, M. Spitalny, C.O. Paschereit, F. Bake, I. Röhle: A new approach for setting up and applying a fiber-based Fabry–Perot interferometer, Meas. Sci. Technol. 21 (2010) 075305 (4pp), doi:10.1088/0957-0233/21/7/075305.
19. H.J. Konle, C.O. Paschereit, I. Röhle (2011): „APPLICATION OF FIBER-OPTICAL MICROPHONE FOR THERMO-ACOUSTIC MEASUREMENTS“, Journal of Engineering for Gas Turbines and Power (133). DOI: 10.1115/1.4001983
20. Rausch, A.; Röhle,I. et al. (2010): „MEASUREMENTS OF DENSITY PULSATIONS IN THE OUTLET NOZZLE OF ACOMBUSTION CHAMBER BY RAYLEIGH-SCATTERING SEARCHING ENTROPY WAVES“, recommended for publication in the Journal of Engineering for Gas Turbines and Power.

Combustion Noise, Liners and Thermo Acoustics

1. F. Bake, U. Michel and I. Roehle, C. Richter and F. Thiele, M. Liuk and B. Noll: "Indirect Combustion Noise Generation in Gas Turbines", Proceeding, American Institute of Aeronautics and Astronautics, Monterey, Mai 2005.
2. Olbricht, F. Flemming, A. Sadiki, J. Janicka, F. Bake, U. Michel, I. Roehle: "A STUDY OF NOISE GENERATION BY TURBULENT FLOW INSTABILITIES IN A GAS TURBINE MODEL COMBUSTOR", Proceedings of TE’05 ASME Turbo Expo 2005, Reno-Tahoe, Nevada, USA, June 06-09, 2005, GT2005-69029.
3. Bake, U. Michel, I. Roehle: "Entropieschall: Experimenteller Nachweis und Beitrag zum Fluglärm", 69. Jahrestagung der Deutschen Physikalischen Gesellschaft e.V., 8. März 2005, Berlin
4. Bake, F.; Michel, U.; Röhle, I.; Richter, C.; Thiele, F.; Liu, M.; Noll, B.: 2005: Indirect Combustion Noise Generation in Gas Turbines. Proceeding, AIAA-Paper 2005-2830, 11th  AIAA/CEAS Aeroacoustics Conference, Monterey, CA, USA. 
5. Bake, F.; Michel, U.; Röhle, I.: 2006: Investigation of Entropy Noise in Aero-Engine Combustors. Referiertes Proceeding, ASME-Paper GT2006-90093, ASME Turbo Expo 2006, Barcelona, Spain
6. Hassa, C.; Röhle, I.; et al. 2006: NONINTRUSIVE FLOWFIELD, TEMPERATURE AND SPECIES MEASUREMENTS ON A GENERIC AEROENGINE COMBUSTOR AT ELEVATED PRESSURES, Referiertes Proceeding, ASME-Paper GT2006-90213, ASME Turbo Expo 2006, Barcelona, Spain 
7. F. Bake, U. Michel, I. Röhle „Entropieschall – Eine Parameterstudie zur Entstehung von indirektem Verbrennungsschall“, Proceeding, 33. Deutsche Jahrestagung für Akustik – DAGA 2007, Stuttgart, 19.-22.03.2007. 
8. C. Heuwinkel, L. Enghardt, I. Röhle „Untersuchung der akustischen Eigenschaften perforierter Liner“, Proceeding, 33. Deutsche Jahrestagung für Akustik – DAGA 2007, Stuttgart, 19.-22.03.2007.
9. S. Busse, C. Heuwinkel, L. Enghardt, I. Röhle „Hochgenaue Bestimmung der akustischen Dämpfung von durchströmten Linern für Triebwerke“, Proceeding, 33. Deutsche Jahrestagung für Akustik – DAGA 2007, Stuttgart, 19.-22.03.2007.
10. C. Heuwinkel, L. Enghardt, I. Röhle “Experimental investigation  of the acoustic damping of perforated liners with bias flow”, Proceeding, 13.th AIAA/CEAS Aeroacoustic Conference, AIAA-2007-3402, Rome, Italy, 21.-23.05.2007.
11. F. Bake, U. Michel, I. Röhle “Experimental investigation of the fundamental entropy noise mechanism in aero-engines”, Proceeding, 13.th AIAA/CEAS Aeroacoustic Conference, AIAA-2007-3694, Rome, Italy, 21.-23.05.2007.
12. F. Bake, U. Michel, I. Röhle “Fundamental Mechanism of Entropy Noise in Aero-Engines: Experimental Investigation”, Referiertes Proceeding, ASME Turbo Expo: Power for Land, Sea and Air, GT2007-27300, Montreal, Canada, 14.-17.05.2007.
13. C. Olbricht, F. Hahn, J. Kühne, A. Sadiki, J. Janicka, F. Bake, I. Röhle  “Flow and Mixing in a Model GT Combustor Investigated by LES and Monte-Carlo Filtered PDF Methods”,  Referiertes Proceeding, ASME Turbo Expo: Power for Land, Sea and Air, GT2007-27270, Montreal, Canada, 14.-17.05.2007.
14. C.F. Heuwinkel (I.Röhle et al) “Experimental investigation of the acoustic damping of perforated liners with bias flow: First results with a zero-mass-flow-liner”, Proceeding, 8th ONERA-DLR Aerospace Symposium, ODAS 2007, 17.-19.10.2007, Göttingen, Germany.
15. F. Bake “Experimental investigation of the fundamental entropy noise mechanism in aero-engines”, Proceeding, 8th ONERA-DLR Aerospace Symposium, ODAS 2007, 17.-19.10.2007, Göttingen, Germany.
16. Bake, F.; Kings, N.; Fischer, A.; Röhle, I. (2008): Noise Generation by Accelerated Flow Inhomogenities - Indirect Combustion Noise. In: Proceedings: International Conference on Jets, Wake and Separated Flows ICJWSF-2008, International Conference on Jets, Wakes and Separated Flows, ICJWSF 2008, Berlin, Germany, 2008-09-16 - 2008-09-19
17. Busse, S.; Richter, C.; Heuwinkel, C.; Enghardt, L.; Röhle, I.; Michel, U.; Thiele, F. (2008): Vergleich experimenteller Daten und numerischer Berechnungen zur Analyse der Dämpfungseigenschaften überströmten Liner für Flugtriebwerke. In: Fortschritte der Akustik, Tagungsband 34. Deutsche Jahrestagung der Akustik - DAGA 2008, 34. Deutsche Jahrestagung der Akustik - DAGA 2008, Dresden, 2008-03-10 - 2008-03-13
18. Busse, S.; Richter, C.; Heuwinkel, C.; Enghardt, L.; Röhle, I.; Michel, U.; Thiele, F.; Ferrante, P.; Scofano, A. (2008): Impedance Deduction Based on Insertion Loss Measurements of Liners under Grazing Flow Conditions. In: Proceedings 14th AIAA7CEAS Aeroacoustic Conference, 14th AIAA/CEAS Conference, Vancouver, Canada, 2008-05-05 - 2008-05-07
19. Fischer, A.; Bake, F.; Röhle, I. (2008): Broadband Entropy Noise Phenomena in a Gas Turbine Combustor. In:  Proceedings ASME Turbo 2008, Berlin, Germany, 2008-06-09 - 2008-06-13
20. Heuwinkel, C.; Bake, F.; Röhle, I. (2008): Verbesserung der Betriebscharakteristik stationär Brennkammern durch Ausnutzung der akustischen Dämpfungseigenschaften der Kühllufteinblasung. In: Abschlussbericht zum AG Turbo; Projekt COOREEF 2.2.5
21. Heuwinkel, C.; Enghardt, L.; Röhle, I. (2008): Concept and Experimental Investigation of a Zero Mass Flow Liner. In: Proceedings 14th AIAA7CEAS Aeroacoustic Conference, 14th AIAA/CEAS Conference, Vancouver, Canada, 2008-05-05 - 2008-05-07
22. Heuwinkel, Claus F.; Mühlbauer, Bernd; Busse, S.; Enghardt, Lars; Noll, Berthold E.; Röhle, Ingo; Aigner, Manfred (2008): Comparison of experimental and numerical results concerning the damping of perforated liners with bias flow.  Proceedings ASME Turbo Expo 2008: Power for Land, Sea and Air, Berlin, 2008-06-09 - 2008-06-13
23. Richter, C.; Thiele, F.; Busse, S.; Heuwinkel, C.; Röhle, I.; Enghardt, L.; Michel, U. (2008): Impedance Eduction from Energy Dissipation Measurements with Flow. In: Proceedings: 79th Annual Meeting of the International Association of Applied Mathematics and Mechanics (GAMM), 79th Annual Meeting of the International Association of Applied Mathematics and Mechanics (GAMM), Bremen, 2008-03-31 - 2008-04-04
24. Röhle, I.; Konle, H. J.; Paschereit, C. O. (2008): Mikrofonenanordnung. Deutsches Zentrum für Luft- und Raumfahrt e.V. DE 10 2008 038 883 1 
25. Fischer, A. und Bake, F. und Enghardt, L. und Röhle, I. und Busse, S. (2009) Acoustic Plane Wave Decomposition by Means of Synchronised PIV. In: Proceedings 15th AIAA/CEAS Aeroacoustics Conference (AIAA Paper-Nr: 2009-3299) . 15th AIAA/CEAS Aeroacoustics Conference , 11.- 13. Mai 2009 , Miami, Florida (USA). Volltext nicht online.
26. Konle, H. J. und Röhle, I. und Paschereit, C. O. (2009) Design and Application of Fiber-Optic Microphones for Thermo-Acoustic Measurements. In: Proceedings 15th AIAA/CEAS Aeroacoustics Conference (AIAA Paper-Nr: 2009-3300) . 15th AIAA/CEAS Aeroacoustics Conference , 11.- 13. Mai 2009 , Miami, Florida (USA).
27. Richter, Ch. und Thiele, F. und Busse, S. und Heuwinkel, C. und Röhle, I. und Enghardt, L. und Michel, U. (2009) Impedance eduction from energy dissipation measurements with flow. In: Proceedings of Applied Mathematics and Mechanics (PAMM).
28. Heuwinkel, C. und Pardowitz, B. und Bake, F. und Röhle, I. und Enghardt, L. (2009) On the Excitation of a Zero Mass Flow Liner for Acoustic Damping. In: Proceedings 15th AIAA/CEAS Aeroacoustics Conference (AIAA Paper-Nr: 2009-3110) . 15th AIAA/CEAS Aeroacoustics Conference , 11.- 13. Mai 2009 , Miami, Florida (USA).
29. A. Rausch, A. Fischer, H. Konle, A. Gaertlein, S. Nitsch, K. Knobloch, F. Bake, I. Röhle (2010) MEASUREMENTS OF DENSITY PULSATIONS IN THE OUTLET NOZZLE OF A COMBUSTION CHAMBER BY RAYLEIGH-SCATTERING SEARCHING ENTROPY WAVES, Proceedings of The ASME Turbo Expo 2010, June 14-18, 2010, Glasgow, UK GT2010-22492.

(Opto-) Acoustic Measurement Techniques 

1. H.J. Konle, C.O. Paschereit, I.Röhle: "FOM – Faser Optisches Mikrofon: eine akusto-optische Messtechnik für die Turbomaschinendiagnostik“, Proceeding, 33. Deutsche Jahrestagung für Akustik – DAGA 2007, Stuttgart, 19.-22.03.2007.
2. H.J. Konle, C.O. Paschereit, I.Röhle: “Development of a novel technique of pressure pulsation measurements in turbomachinery: fibre optic microphone”, Proceeding, 13.th AIAA/CEAS Aeroacoustic Conference, AIAA-2007-3444, Rome, Italy, 21.-23.05.2007.
3. H.J. Konle, A. Rausch, C.O. Paschereit, I. Röhle: “Development of a novel technique of pressure pulsation measurements in turbomachinery: fibre optic microphones”, Proceeding, 8th ONERA-DLR Aerospace Symposium, ODAS 2007, 17.-19.10.2007, Göttingen, Germany.
4. A. Fischer, J. Heinze, F. Bake, C. Willert, I. Röhle: “Off-line phase averaged PIV and OH-chemiluminescence measurements using acoustic time series”, Proceeding, 7th International Symposium on PIV, 11.-14.09.2007, Rome, Italy. (accepted)
5. E. Sauvage, H. Birke, A. Fischer, L. Enghardt, I. Röhle: “Acoustic PIV: Measurements of acoustic particle velocity with PIV for near field investigations of liners”, Proceeding, 8th ONERA-DLR Aerospace Symposium, ODAS 2007, 17.-19.10.2007, Göttingen, Germany.
6. Fischer, A.; Enghardt, L.; Röhle, I. (2008): Schallschnellemessung mit akustischem PIV am Beispiel einer Lochplatte. In: Fortschritte der Akustik - Tagungsband 34. Deutsche Jahrestagung der Akustik, 34. Deutsche Jahrestagung der Akustik - DAGA 2008, Dresden, 2008-03-10 - 2008-03-13
7. Fischer, A.; Sauvage, E.; Röhle, I. (2008): Acoustic PIV: Measurements of the acoustic particle of velocity using synchronzied PIV-Technique. In: Proceedings: Acoustics '08, Paris, Acoustics '08 Paris, Paris, France, 2008-06-29 - 2008-07-04, ISBN 978-2-9521105-4-9
8. Fischer, A.; Sauvage, E.; Röhle, I. (2008): Acoustic PIV: Measurements of the acoustic particle velocity using synchronized PIV-technique. In: Proceedings: 14th International Symposium on Applications of Laser Techniques to Fluid Mechanics, 14th International Symposium on Applications of Laser Techniques to Fluid Mechanics, Lisbon, Portugal, 2008-07-07 - 2008-07-10
9. Konle, H. J.; Paschereit, C. O.; Röhle, I. (2008): A Fabry-Perot interferometer designed for acoustic measurements in hot environments. MOTAR-Meeting, Measurement and Observation Techniques for Aerospace Research, Göttingen, 2008-04-01 -2008-04-03
10. Konle, H. J.; Paschereit, C. O.; Röhle, I. (2008): Stand der Faser-Optischen-Mikrofone: Einsatzgrenzen Mach-Zehnder, Funktionsweise Fabry-Perot. Diagnostik in Verbrennung (DIV) 4, Köln, 2008-10-16 - 2008-10-17
11. Konle, H. J.; Röhle, I.; Paschereit, C. O. (2008): A fiber optic microphone for pressure pulsation measurements in harsh environments: first hot measuresments. In: Proceedings: 14th International Symposium on Applications of Laser Techniques to Fluid Mechanics, 14th International Symposium on Applications of Laser Techniques to Fluid Mechanics, Lisbon, Portugal, 2008-07-07 - 2008-07-10
12. Konle, H. J.; Röhle, I.; Paschereit, C. O. (2008): Aufbau und Untersuchung eines erweiterten Fabry-Perot-Interferometers für akustische Messugen in heißen Umgebungen. In: Ruck, B.; Leder, A.; Dopheide, D. [Hrsg.]: Proceedings der 16. GALA-Fachtagung "Lasermethoden in der Strömungsmesstechnik", S. - 508, 16. GALA-Fachtagung "Lasermethoden in der Strömungsmesstechnik", Karlsruhe, 2008-09-09 - 2008-09-11, ISBN ISBN 978-3-9805613-4-1
13. Konle, H. J. und Röhle, I. und Paschereit, C. O. (2009) The Design and the Application of Fiber-Optic Microphones for Acoustic Measurements in Hot Environments. In: Proceedings of the NAG/DAGA 2009 . NAG/DAGA International Conference on Acoustics , 23.-26. März 2009 , Rotterdam, Niederlande. ISBN 978-3-9808659-6-8.
14. Konle, H. J. und Röhle, I. und Paschereit, C. O. (2009) Fiber Optical Microphone Designed and Applied for Thermo-Acoustic Measurements. 4th EVI-GTI INTERNATIONAL GAS TURBINE INSTRUMENTATION CONFERENCE , 23.-25 Sep. 2009 , Norrköping, Schweden.
15.  Konle, H. J. und Paschereit, C. O. und Röhle, I. (2010): Application of Fiber-Optic Microphone for Thermo-Acoustic Measurements.  In: Proceedings of the ASME TURBO EXPO (Paper GT2010-22022). ASME Turbo Expo 2010: Power for Land, Sea and Air, June, 14-18 2010, Glasgow, United Kingdom. ISBN 9780791838723.

Point Velocimetry

1. I. Röhle, G. Karpinski, R. Schodl: "3C-Doppler-L2F: A new Kind of Three Component Anemometer", Proceeding, ICIASF, Toulouse, 1999.
2. R. Schodl, W. Forster, G. Karpinsky, I. Rohle: "3-Component-Doppler-laser-two-focus velocimetry applied to a transonic centrifugal compressor",  Proceeding, 10^th international Symposium on Applications of Laser Techniques to Fluid Mechanics, Lisbon, 2000.
3. W. Förster, G. Karpinski, M. Beversdorff, I. Röhle, R. Schodl: "3-Komponenten Strömungsuntersuchungen mittels der Doppler-Laser-2-Fokus Technik in einem transsonischen Radialverdichter", Proceeding, GALA, Freising, 2000.