Felix Czwielong

2024

• Berchtenbreiter B., Grützner D., Czwielong F., Becker S.:
  Silencers in Flow Ducts using Double-Layer MPA
  30th AIAA/CEAS Aeroacoustics Conference, 2024 (Rome, ITA, June 4, 2023 - June 7, 2023)
  In: 30th AIAA/CEAS Aeroacoustics Conference, 2024 2024
  DOI: 10.2514/6.2024-3076
• Heidegger P., Czwielong F., Schoder S., Becker S., Kaltenbacher M.:
  A Finite-Element-Simulation Workflow and First Results of the Aero- and Vibro-Acoustic Signature of an Enclosed Centrifugal Fan
  13th International Styrian Noise, Vibration and Harshness Congress: The European Automotive Noise Conference, SNVH 2024 (Graz, AUT, June 19, 2024 - June 21, 2024)
  In: SAE Technical Papers 2024
  DOI: 10.4271/2024-01-2940
• Schode S., Boysen J., Mayrhofer D., Kraxberger F., Heidegger P., Wurzinger A., Czwielong F., Maurerlehner P.:
  Development of a Didactic Demonstrator for Aeroacoustic Evaluations of Ducts
  30th AIAA/CEAS Aeroacoustics Conference, 2024 (Rome, June 4, 2024 - June 7, 2024)
  In: 30th AIAA/CEAS Aeroacoustics Conference, 2024 2024
  DOI: 10.2514/6.2024-3246
• Tieghi L., Czwielong F., Barnabei VF., Ocker C., Delibra G., Becker S., Corsini A.:
  Aerodynamics and Aeroacoustics of Leading Edge Serration in Low-Speed Axial Fans With Forward Skewed Blades
  In: Journal of Engineering For Gas Turbines and Power-Transactions of the Asme 146 (2024), Article No.: 021007
  ISSN: 0742-4795
  DOI: 10.1115/1.4063420

2023

• Benz J., Czwielong F., Renz A., Ocker C., Sedlmajer M., Merkel M., Schoder S., Becker S.:
  INFLUENCE OF CHORD LENGTH AND LOAD DISTRIBUTION MODIFICATION ON THE SOUND EMISSION AND EFFICIENCY OF A BENCHMARK FAN
  10th Convention of the European Acoustics Association, EAA 2023 (Torino, ITA, September 11, 2023 - September 15, 2023)
  In: Proceedings of Forum Acusticum 2023
• Czwielong F., Becker S.:
  Active Turbulence Grid-Controlled Inflow Turbulence and Replication of Heat Exchanger Flow Fields in Fan Applications
  In: International Journal of Turbomachinery, Propulsion and Power 8 (2023), Article No.: 1
  ISSN: 2504-186X
  DOI: 10.3390/ijtpp8010001
• Czwielong F., Becker S.:
  IMPACT OF HEAT EXCHANGERS ON AXIAL FAN ROTOR NOISE IN HEAT PUMP APPLICATIONS
  10th Convention of the European Acoustics Association, EAA 2023 (Torino, ITA, September 11, 2023 - September 15, 2023)
  In: Proceedings of Forum Acusticum 2023
• Czwielong F., Benz J., Ocker C., Renz A., Sedlmajer M., Merkel M., Becker S.:
  ON THE AEROACOUSTIC PROPERTIES OF A PRANDTL-FAN
  ASME Turbo Expo 2023: Turbomachinery Technical Conference and Exposition, GT 2023 (Boston, MA, USA, June 26, 2023 - June 30, 2023)
  In: Proceedings of the ASME Turbo Expo 2023
  DOI: 10.1115/GT2023-103898
• Czwielong F., Uffinger T., Becker S.:
  CONTROLLED INFLOW CONDITIONS FOR RADIAL FANS - AN AEROACOUSTIC RADIAL FAN TEST RIG
  15th European Conference on Turbomachinery Fluid Dynamics and Thermodynamics 2023, ETC 2023 (Budapest, April 24, 2023 - April 28, 2023)
  In: 15th European Conference on Turbomachinery Fluid Dynamics and Thermodynamics 2023, ETC 2023 2023
• Heidegger P., Czwielong F., Becker S., Kaltenbacher M.:
  Simulating the Fluid-Structure-Acoustic Interaction of the Confined Flow in a Centrifugal Fan
  15th International Conference on Theoretical Computational Acoustics, ICTCA 2023 (Monterey, CA, USA, August 6, 2023 - August 11, 2023)
  In: 15th International Conference on Theoretical Computational Acoustics, ICTCA 2023 2023
• Hruška V., Krpenský A., Bednar̆ík M., Czwielong F.:
  Novel design for acoustic silencers for ducts with flow based on the bound states in the continuum
  In: Archive of Applied Mechanics (2023)
  ISSN: 0939-1533
  DOI: 10.1007/s00419-023-02508-y
• Hruška V., Krpenský A., Bednařík M., Czwielong F.:
  DESIGN OF LOW DRAG REACTIVE SILENCERS BASED ON THE BOUND STATES IN THE CONTINUUM
  10th Convention of the European Acoustics Association, EAA 2023 (Torino, ITA, September 11, 2023 - September 15, 2023)
  In: Proceedings of Forum Acusticum 2023
• Näger C., Wachter F., Lienhart H., Czwielong F., Riedel J., Becker S.:
  Boundary layer measurements of the flow along a streamwise-oriented circular cylinder using particle tracking velocimetry
  In: International Journal of Heat and Fluid Flow (2023)
  ISSN: 0142-727X
  DOI: 10.1016/j.ijheatfluidflow.2023.109225
  URL: https://www.sciencedirect.com/science/article/abs/pii/S0142727X23001248?via=ihub
• Tieghi L., Becker S., Corsini A., Delibra G., Schoder S., Czwielong F.:
  Machine-Learning Clustering Methods Applied to Detection of Noise Sources in Low-Speed Axial Fan
  In: Journal of Engineering For Gas Turbines and Power-Transactions of the Asme 145 (2023)
  ISSN: 0742-4795
  DOI: 10.1115/1.4055417
• Tieghi L., Czwielong F., Barnabei VF., Ocker C., Delibra G., Becker S., Corsini A.:
  AERODYNAMICS AND AEROACOUSTICS OF LEADING EDGE SERRATION IN LOW-SPEED AXIAL FANS WITH FORWARD SKEWED BLADES
  ASME Turbo Expo 2023: Turbomachinery Technical Conference and Exposition, GT 2023 (Boston, MA, USA, June 26, 2023 - June 30, 2023)
  In: Proceedings of the ASME Turbo Expo 2023
  DOI: 10.1115/GT2023-101899
• Uffinger T., Czwielong F., Renz A., Heidegger P., Schoder S., Kaltenbacher M., Becker S.:
  Development of a test rig for the investigation of flow-induced mechanisms of sound generation at radial fans
  In: Applied Acoustics 211 (2023), Article No.: 109553
  ISSN: 0003-682X
  DOI: 10.1016/j.apacoust.2023.109553

2022

• Czwielong F., Hruška V., Mader T., Becker S.:
  Installationseffekte von Wärmeübertragern auf Axialventilatoren
  DAGA 2022 Stuttgart (Stuttgart, March 21, 2022 - March 24, 2022)
• Czwielong F., Soldat J., Becker S.:
  On the interactions of the induced flow field of heat exchangers with axial fans
  In: Experimental Thermal and Fluid Science 139 (2022), Article No.: 110697
  ISSN: 0894-1777
  DOI: 10.1016/j.expthermflusci.2022.110697
• Mirabilii D., Lodermeyer A., Czwielong F., Becker S., Habets E.:
  Simulating Wind Noise with Airflow Speed-Dependent Characteristics
  17th International Workshop on Acoustic Signal Enhancement, IWAENC 2022 (Bamberg, DEU, September 5, 2022 - September 8, 2022)
  In: International Workshop on Acoustic Signal Enhancement, IWAENC 2022 - Proceedings 2022
  DOI: 10.1109/IWAENC53105.2022.9914785
• Ocker C., Czwielong F., Chaitanya P., Pannert W., Becker S.:
  Aerodynamic and aeroacoustic properties of axial fan blades with slitted leading edges
  In: Acta Acustica 6 (2022)
  ISSN: 2681-4617
  DOI: 10.1051/aacus/2022043
• Ocker C., Herold G., Czwielong F., Pannert W.:
  Analytisch und iterativ berechnete Steering-Vektoren zur Lokalisierung rotierender Schallquellen
  DAGA 2022 Stuttgart (Stuttgart, March 21, 2022 - March 24, 2022)
• Schoder S., Czwielong F., Kaltenbacher M.:
  Revisiting the EAA Benchmark for a low-pressure axial fan
  DAGA 2022 Stuttgart (Stuttgart, March 21, 2022 - March 24, 2022)
• Tieghi L., Becker S., Corsini A., Delibra G., Schoder S., Czwielong F.:
  MACHINE-LEARNING CLUSTERING METHODS APPLIED TO DETECTION OF NOISE SOURCES IN LOW-SPEED AXIAL FAN
  ASME Turbo Expo 2022: Turbomachinery Technical Conference and Exposition, GT 2022 (Rotterdam, NLD, June 13, 2022 - June 17, 2022)
  In: Proceedings of the ASME Turbo Expo 2022
  DOI: 10.1115/GT2022-82116

2021

• Czwielong F., Becker S.:
  Aktives Turbulenzgitter - Generierung definierter Zuströmturbulenzen für Axialventilatoren
  DAGA 2021 Wien (Wien, August 15, 2021 - August 18, 2021)
• Czwielong F., Floss S., Kaltenbacher M., Becker S.:
  Sound reduction in heat exchanger modules by integrating plate absorbers with sub-millimeter openings
  In: Acta Acustica (2021)
  ISSN: 2681-4617
  DOI: 10.1051/aacus/2021020
• Czwielong F., Hruška V., Bednařík M., Becker S.:
  On the acoustic effects of sonic crystals in heat exchanger arrangements
  In: Applied Acoustics 182 (2021), p. 108253
  ISSN: 0003-682X
  DOI: 10.1016/j.apacoust.2021.108253
• Czwielong F., Hruška V., Bednařík M., Becker S.:
  The influence of periodic structures on sound propagation through heat exchangers
  DAGA 2021 Wien (Wien, August 15, 2021 - August 18, 2021)
• Floss S., Czwielong F., Becker S., Kaltenbacher M.:
  Micro-perforated panels for noise reduction
  In: Elektrotechnik und Informationstechnik (2021)
  ISSN: 0932-383X
  DOI: 10.1007/s00502-021-00889-y
  URL: https://link.springer.com/article/10.1007/s00502-021-00889-y
• Floss S., Czwielong F., Becker S., Kaltenbacher M.:
  Micro-perforated panels in interaction with boundary layers in zero pressure gradient flow
  DAGA 2021 Wien (Wien, August 15, 2021 - August 18, 2021)
• Floss S., Czwielong F., Kaltenbacher M., Becker S.:
  Design of an in-duct micro-perforated panel absorber for axial fan noise attenuation
  In: Acta Acustica 5 (2021)
  ISSN: 2681-4617
  DOI: 10.1051/aacus/2021015
• Ocker C., Czwielong F., Geyer T., Merkel M., Becker S.:
  Strukturierte Porosittät zur Lärmminderung von Axialventilatoren
  DAGA 2021 Wien (Wien, August 15, 2021 - August 18, 2021)
• Ocker C., Czwielong F., Geyer T., Paruchuri C., Merkel M., Becker S.:
  Permeable Structures for Leading Edge Noise Reduction
  AIAA AVIATION 2021 FORUM (, August 2, 2021 - August 6, 2021)
  DOI: 10.2514/6.2021-2192
• Ocker C., Czwielong F., Krömer F., Paruchuri C., Pannert W., Becker S.:
  Schallquellenlokalisierung an geschlitzten Axialventilatoren mit rotierendem Beamforming
  DAGA 2021 Wien (Wien, August 15, 2021 - August 18, 2021)
• Ocker C., Geyer T., Czwielong F., Krömer F., Pannert W., Merkel M., Becker S.:
  Permeable Leading Edges for Airfoil and Fan Noise Reduction in Disturbed Inflow
  In: AIAA Journal (2021)
  ISSN: 0001-1452
  DOI: 10.2514/1.J060396

2020

• Czwielong F., Becker S.:
  Sensibilitätsanalyse verschiedener Wärmeübertragerparameter und deren Einfluss auf die Schallabstrahlung von Axialventilatoren
  DAGA 2020 Hannover (Hannover, March 16, 2020 - March 19, 2020)
• Czwielong F., Floss S., Kaltenbacher M., Becker S.:
  Influence of a micro-perforated duct absorber on sound emission and performance of axial fans
  In: Applied Acoustics (2020)
  ISSN: 0003-682X
  DOI: 10.1016/j.apacoust.2020.107746
  URL: https://www.sciencedirect.com/science/article/pii/S0003682X20308501?via=ihub
• Czwielong F., Floss S., Kaltenbacher M., Becker S.:
  Optimierte Schallreduktion in Axialventilatorsystemen durch mikroperforierte Absorber
  DAGA 2020 Hannover (Hannover, March 16, 2020 - March 19, 2020)
• Ocker C., Pannert W., Merkel M., Geyer T., Czwielong F., Krömer F., Becker S.:
  Experimental Investigation of the Impact of 3D-Metal-Printed Perforated Leading Edges on Airfoil and Axial Fan Noise
  AIAA AVIATION 2020 FORUM (Virtual Event, June 15, 2020 - June 19, 2020)
  DOI: 10.2514/6.2020-2529

2019

• Becker S., Czwielong F., Krömer F.:
  Untersuchung der Schallabstrahlung von gesichelten Axialventilatoren mit sinusförmigen Vorderkanten
  DAGA - Deutsche Jahrestagung für Akustik 2019 (Rostock, March 18, 2019 - March 21, 2019)
  In: Deutsche Gesellschaft für Akustik - DEGA (ed.): Fortschritte der Akustik - DAGA 2019 45. Deutsche Jahrestagung für Akustik, 18.-21. März 2019 in Rostock 2019
• Czwielong F., Krömer F., Becker S.:
  Experimental investigations of the sound emissons of axial fans under the influence of suction-side heat exchangers
  25th AIAA/CEAS Aeroacoustics Conference (Delft, May 20, 2019 - May 23, 2019)
  DOI: 10.2514/6.2019-2618
• Czwielong F., Krömer F., Becker S.:
  Experimentelle Untersuchung der Schallabstrahlung von Wärmeübertrager-Axialventilator-Modulen
  DAGA - Deutsche Jahrestagung für Akustik 2019 (Rostock, March 18, 2019 - March 21, 2019)
  In: Deutsche Gesellschaft für Akustik - DEGA (ed.): Fortschritte der Akustik - DAGA 2019 45. Deutsche Jahrestagung für Akustik, 18.-21. März 2019 in Rostock 2019
• Czwielong F., Krömer F., Becker S.:
  Sound Emissions of Axial Fans with Leading-Edge Serrations on different spanwise Locations
  inter.noise 2019 (Madrid, June 16, 2019 - June 19, 2019)
  In: PROCEEDINGS OF INTERNOISE 2019 The 49th International Congress and Exhibition on Noise Control Engineering 2019
• Czwielong F., Krömer F., Paruchuri C., Becker S.:
  Experimental investigation of the influence of different leading edge modifications on the sound emission of axial fans downstream of a heat exchanger
  Proceedings of the 23rd International Congress on Acoustics, integrating 4th EAA Euroregio 2019 (Aachen, September 9, 2019 - September 13, 2019)
  Open Access: http://pub.dega-akustik.de/ICA2019/data/articles/001182.pdf
  URL: http://pub.dega-akustik.de/ICA2019/data/articles/001182.pdf
• Floss S., Czwielong F., Krömer F., Becker S., Kaltenbacher M.:
  Achieving axial fan sound reduction with micro-perforated absorbers
  DAGA - Deutsche Jahrestagung für Akustik 2019 (Rostock, March 18, 2019 - March 21, 2019)
  In: Deutsche Gesellschaft für Akustik - DEGA (ed.): Fortschritte der Akustik - DAGA 2019 45. Deutsche Jahrestagung für Akustik, 18.-21. März 2019 in Rostock 2019
• Krömer F., Czwielong F., Becker S.:
  Experimental Investigation of the Sound Emission of Skewed Axial Fans with Leading-Edge Serrations
  In: AIAA Journal (2019)
  ISSN: 0001-1452
  DOI: 10.2514/1.J058134
  URL: https://arc.aiaa.org/doi/abs/10.2514/1.J058134?journalCode=aiaaj
• Krömer F., Czwielong F., Becker S.:
  Experimental investigation of the sound emission of skewed axial fans with leading-edge-serrations
  25th AIAA/CEAS Aeroacoustics Conference (Delft, May 20, 2019 - May 23, 2019)
  DOI: 10.2514/6.2019-2735