TY - JOUR A1 - Kameier, Frank A1 - Wagner, Thomas A1 - Horvat, Igor A1 - Ullrich, Frank T1 - Experimental and numerical investigation of air dam aeroacoustics JF - ATZ worldwide Y1 - 2009 U6 - https://doi.org/10.1007/bf03225090 VL - 111 IS - 7-8 SP - 54 EP - 59 PB - Springer ER - TY - JOUR A1 - Kameier, Frank A1 - Wagner, Thomas A1 - Horvat, Igor A1 - Ullrich, Frank T1 - Experimentelle und numerische Untersuchung zur Strömungsakustik einer Staulippe JF - ATZ Automobiltech Zeitschrift Y1 - 2009 U6 - https://doi.org/10.1007/bf03222094 VL - 111 IS - 7-8 SP - 562 EP - 567 PB - Springer ER - TY - JOUR A1 - Biedermann, Till M. A1 - Czeckay, Pasquale A1 - Geyer, Thomas F. A1 - Kameier, Frank A1 - Paschereit, Christian O. T1 - Effect of Inflow Conditions on the Noise Reduction Through Leading Edge Serrations JF - AIAA Journal Y1 - 2019 U6 - https://doi.org/10.2514/1.j057831 SN - 1533-385X VL - 57 IS - 9 SP - 4104 EP - 4109 PB - ARC ER - TY - JOUR A1 - Winkler, Michael A1 - Becker, Klaus A1 - Doolan, Con A1 - Kameier, Frank A1 - Paschereit, Christian Oliver T1 - Aeroacoustic Effects of a Cylinder-Plate Configuration JF - AIAA Journal Y1 - 2012 U6 - https://doi.org/10.2514/1.j051578 VL - 50 IS - 7 SP - 1614 EP - 1620 PB - ARC ER - TY - JOUR A1 - Biedermann, Till M. A1 - Reich, Marius A1 - Kameier, Frank A1 - Adam, Mario T1 - Assessment of statistical sampling methods and approximation models applied to aeroacoustic and vibroacoustic problems JF - Advances in Aircraft and Spacecraft Science KW - artificial neural networks KW - design of experiments KW - Latin hypercube sampling KW - aeroacoustics KW - aerodynamics KW - spectral analysis Y1 - 2019 UR - http://www.techno-press.org/content/?page=article&journal=aas&volume=6&num=6&ordernum=7 U6 - https://doi.org/10.12989/aas.2019.6.6.531 SN - 2287-528X VL - 6 IS - 6 SP - 529 EP - 550 PB - Techno Press ER - TY - JOUR A1 - Biedermann, Till M. A1 - Chong, Tze Pei A1 - Kameier, Frank A1 - Paschereit, Christian O. T1 - Statistical–Empirical Modeling of Airfoil Noise Subjected to Leading-Edge Serrations JF - AIAA Journal Y1 - 2017 U6 - https://doi.org/10.2514/1.j055633 VL - 55 IS - 9 SP - 3128 EP - 3142 PB - ARC ER - TY - JOUR A1 - Biedermann, Till M. A1 - Hintzen, Nils A1 - Kameier, Frank T1 - Aeroacoustic Interactions of Blade Skew and Leading Edge Serrations Applied to Low-Pressure Axial Fans JF - Journal of Engineering for Gas Turbines and Power N2 - Leading edge serrations are well known for their ability to reduce turbulence-induced noise of single aerofoils while also providing aerodynamic advantages under certain operating conditions. Continuatively, applying leading edge serrations to rotating machinery such as axial fans proved the validity to generally transfer the obtained aeroacoustic benefits of single aerofoils. However, for the rotating applications the noise reduction potential highly depends on the point of operation. The current work aims at assessing the aeroacoustic effects of serrated leading edges under the increased geometrical complexity of the fan blades through blade skew. Therefore, the question is whether combining two potentially effective noise-reducing treatments through blade skew and leading edge serrations results in leveraging or obstructing effects. By varying the skew angle from 0 deg to 38 deg, four different prototypes of the fan impeller are tested experimentally in a test rig according to ISO 5136 and ISO 5801. All configurations are tested with original blades of straight leading edges plus five sets of serrations each, parameterised by the serration amplitude and the serrations wavelength. The intensity of the incoming turbulence ranges from 2.6% to 12.1%. The results obtained show the skewed blades to improve both the aerodynamic performance and the noise radiation after exceeding an initial skew angle, complemented by a significant onset of stall. Moreover, no contraindication between blade skew and serrated leading edges is encountered, showing the potential to further extend the noise reduction capabilities by combining effects of blade skew and leading edge treatment. KW - Lärmschutz KW - Turbulenz KW - Ventilator Y1 - 2022 U6 - https://doi.org/10.1115/1.4055637 SN - 0742-4795 VL - 144 IS - 12 PB - ASME ER - TY - JOUR A1 - Biedermann, Till M. A1 - Czeckay, Pasquale A1 - Hintzen, Nils A1 - Kameier, Frank A1 - Paschereit, C. O. T1 - Applicability of Aeroacoustic Scaling Laws of Leading Edge Serrations for Rotating Applications JF - acoustics KW - DOAJ KW - ISAVE Y1 - 2020 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:due62-opus-40311 SN - 2624-599X VL - 2 IS - 3 SP - 579 EP - 594 PB - MDPI ER -