Dr. Felix Langfeldt

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Department Fahrzeugtechnik und Flugzeugbau

felix.langfeldt@haw-hamburg.de

Tätigkeiten

Lehrgebiete/Lehrfächer

Mathematik STARTplusintensiv

Schwerpunktthemen/Kernkompetenzen

  • Schallschutz
  • Flugzeugkabinenakustik
  • Akustische Metamaterialien
  • Modellierung von akustischen Problemstellungen

Publikationen

Zeitschriftenbeiträge:

F. Langfeldt and W. Gleine. Impact of manufacturing inaccuracies on the acoustic performance of sound insulation packages with plate-like acoustic metamaterials. SAE Technical Paper 2020-01-1562, 2020. [ DOI ]

F. Langfeldt and W. Gleine. Optimizing the bandwidth of plate-type acoustic metamaterials. The Journal of the Acoustical Society of America, 148(3):1304–1314, 2020. [ DOI ]

F. Langfeldt, H. Hoppen, and W. Gleine. Broadband low-frequency sound transmission loss improvement of double walls with helmholtz resonators. Journal of Sound and Vibration, 476:115309, 2020. [ DOI ]

F. Langfeldt and W. Gleine. Membrane- and plate-type acoustic metamaterials with elastic unit cell edges. Journal of Sound and Vibration, 453:65–86, 2019. [ DOI ]

F. Langfeldt, H. Hoppen, and W. Gleine. Resonance frequencies and sound absorption of helmholtz resonators with multiple necks. Applied Acoustics, 145:314–319, 2019. [ DOI ]

F. Langfeldt, W. Gleine, and O. von Estorff. An efficient analytical model for baffled, multi-celled membrane-type acoustic metamaterial panels. Journal of Sound and Vibration, 417:359–375, 2018. [ DOI ]

F. Langfeldt, H. Kemsies, W. Gleine, and O. von Estorff. Perforated membrane-type acoustic metamaterials. Physics Letters A, 381(16):1457–1462, 2017. [ DOI ]

M. Islam, F. Langfeldt, J. Fürst, and D. H. Wood. CFD analysis of a SD 7003 airfoil with a local correlation based transition and turbulence model. IOP Conference Series: Materials Science and Engineering, 184(1):012067, 2017. [ DOI ]

F. Langfeldt, J. Riecken, W. Gleine, and O. von Estorff. A membrane-type acoustic metamaterial with adjustable acoustic properties. Journal of Sound and Vibration, 373:1–18, 2016. [ DOI ]

F. Langfeldt, W. Gleine, and O. von Estorff. Analytical model for low-frequency transmission loss calculation of membranes loaded with arbitrarily shaped masses. Journal of Sound and Vibration, 349:315–329, 2015. [ DOI ]

M. Breuer, M. Alletto, and F. Langfeldt. Sandgrain roughness model for rough walls within eulerian-lagrangian predictions of turbulent flows. International Journal of Multiphase Flow, 43:157–175, 2012. [ DOI ]

Konferenzbeiträge:

H. Hoppen, F. Langfeldt, W. Gleine, and O. von Estorff. Optimierung eines Helmholtz-Resonators mit integriertem Biegebalken für Anwendungen in Doppelwänden. In Proceedings of DAGA 2020, pages 1055–1058, Hannover, 2020.

Y. Abawi, F. Langfeldt, H. Hoppen, W. Gleine, and B. Milow. Application of the Johnson-Champoux-Allard model for the calculation of the sound absorption coefficient of aerogel granules based on inverse characterization for the determination of the granules parameters. In Proceedings of DAGA 2020, pages 1039–1042, Hannover, 2020.

F. Langfeldt and W. Gleine. Design of Acoustic Partitions with Thin Plate-like Acoustic Metamaterials. In Proceedings of the 23rd International Congress on Acoustics, pages 4870–4877, Aachen, 2019. [ DOI | .pdf ]

H. Hoppen, F. Langfeldt, W. Gleine, and O. von Estorff. Aircraft side wall with improved low-frequency sound insulation using a lining panel with helmholtz resonators. In Proceedings of the 26th International Congress on Sound & Vibration, Montréal, 2019. [ .pdf ]

F. Langfeldt and W. Gleine. Improved sound transmission loss of glass wool with acoustic metamaterials. In Proceedings of the 26th International Congress on Sound & Vibration, Montréal, 2019. [ .pdf ]

H. Hoppen, F. Langfeldt, W. Gleine, and O. von Estorff. Gekoppelter Helmholtz-Resonator mit schwingfähigem mechanischem Resonator. In Proceedings of DAGA 2019, pages 433–436, Rostock, 2019.

F. Langfeldt and W. Gleine. Einfluss von Nebenwegen auf die Schalldämmung von akustischen Metamaterialien. In Proceedings of DAGA 2019, pages 429–432, Rostock, 2019.

F. Langfeldt and W. Gleine. Ein Konzept für eine Doppelwand mit reduzierter Luftschichtsteifigkeit. In Proceedings of DAGA 2018, pages 1659–1662, München, 2018.

F. Langfeldt and W. Gleine. Tieffrequente Luftschalldämmung mit akustischen Membran-Metamaterialien. In Proceedings of DAGA 2018, pages 60–63, München, 2018.

F. Langfeldt, H. Kemsies, W. Gleine, and O. von Estorff. Akustische Eigenschaften von durchlochten Membran-Metamaterialien. In Proceedings of DAGA 2017, pages 650–653, Kiel, 2017. [ .pdf ]

F. Langfeldt, W. Gleine, and O. von Estorff. Enhancing the low-frequency noise reduction of a double wall with membrane-type acoustic metamaterials. In Proceedings of Inter-Noise 2016, pages 7551–7562, Hamburg, 2016.

F. Langfeldt, W. Gleine, and O. von Estorff. Untersuchung von akustischen Membran-Metamaterialien mit einstellbaren akustischen Eigenschaften. In Proceedings of DAGA 2015, pages 1386–1389, Nürnberg, 2015. [ .pdf ]

P. Marinova, F. Langfeldt, S. Lippert, O. von Estorff, and W. Gleine. Further Development of Aircraft Fuselage Section Interconnection to Reduce the Structure-Borne Sound Transfer at Low-Frequencies. In Proceedings of the 5th International Workshop on Aircraft System Technologies, pages 171–180, Hamburg, 2015.

F. Langfeldt, W. Gleine, and O. von Estorff. Low-Frequency Noise Protector Concepts for Aircraft With Counter-Rotating Open Rotor Engines. In Proceedings of the 5th International Workshop on Aircraft System Technologies, pages 161–170, Hamburg, 2015.

P. Marinova, O. von Estorff, S. Lippert, F. Langfeldt, and W. Gleine. Low-frequency air- and structure-borne sound insulation challenges for a counter-rotating open-rotor aircraft. In Proceedings of the 21st International Congress on Sound & Vibration, Peking, 2014. [ .pdf ]

P. Marinova, F. Langfeldt, S. Lippert, O. von Estorff, and W. Gleine. Noise-shield with membrane-type metamaterials for low-frequency sound insulation. Part II: Numerical investigation of the full-scale acoustic panel assembly. In Proceedings of DAGA 2014, pages 407–408, Oldenburg, 2014. [ .pdf ]

F. Langfeldt, P. Marinova, W. Gleine, S. Lippert, and O. von Estorff. Noise-shield with membrane-type metamaterials for low-frequency sound insulation. Part I: Analytical investigation of the multi-layered assembly. In Proceedings of DAGA 2014, pages 405–406, Oldenburg, 2014. [ .pdf ]

F. Langfeldt, F. T. Seebo, W. Gleine, and O. von Estorff. Reduction of Low-frequency Structure-borne Sound Transfer Between Two Sections of a Stiffened Cylindrical Shell By Structural Transfer Path Modification. In Proceedings of the 4th International Workshop on Aircraft System Technologies, pages 265–274, Hamburg, 2013.

F. Langfeldt, F. T. Seebo, W. Gleine, and O. von Estorff. Evaluation of Structural Sound Path Modification Methods for the Reduction of Structure-Borne Sound Transmission in Aircraft Fuselage Structures. In Proceedings of AIA-DAGA 2013, pages 2231–2234, Meran, 2013. [ .pdf ]

Weitere Veröffentlichungen:

F. Langfeldt. Membrane-type acoustic metamaterials for aircraft noise shields. Ph.D. thesis, Hamburg University of Technology, 2018. [ DOI ]

F. Langfeldt and W. Gleine. Abschlussbericht für das LuFo IV-4 Verbundvorhaben "Comfortable Cabin for Low-Emission Aircraft". Teilvorhaben: Konzeptstudien zur Reduktion der Lärmübertragung gegenläufiger Propellerantriebe in einen Flugzeugrumpf und dessen Schallübertragung in die Passagierkabine. Technical report, Hamburg University of Applied Sciences, 2017. [ DOI ]

F. Langfeldt. Einfluss reibungsbehafteter Partikel-Wand- und Partikel-Partikel-Kollisionen auf die Large-Eddy Simulation disperser Mehrphasenströmungen. Master's thesis, Hamburg University of Applied Sciences, 2011. [ .pdf ]

F. Langfeldt. Modellierung und Simulation von einphasigen, turbulenten Freistrahlen in unter- und transkritischen Umgebungen für Raketenanwendungen. Bachelor's thesis, Hamburg University of Applied Sciences, 2010.

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