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Aerodynamic damping of composite UHBR fans under the consideration of acoustic intake reflections

Gößling, Jan; Seume, Joerg R.; Flüh, Jan Peter; Paletta, Nicola; Eggers, Torben; Friedrichs, Jens; Natale, Nunzio (New York, N.Y. : The American Society of Mechanical Engineers, 2022)

Steadily rising regulations and demands on aeroengines require the continuous reduction of CO2 emissions. Among other factors, particularly the weight reduction of the engine as well as synergetic engine-airframe integration ...
Composite UHBR fan for forced response and flutter investigations

Eggers, Torben; Friedrichs, Jens; Goessling, Jan; Seume, Joerg R.; Natale, Nunzio; Flüh, Jan Peter; Paletta, Nicola (New York, N.Y. : The American Society of Mechanical Engineers, 2021)

In the CA3ViAR (Composite fan Aerodynamic, Aeroelastic, and Aeroacoustic Validation Rig) project, a composite lowtransonic fan is designed and tested. The aim is a scaled ultrahigh bypass ratio (UHBR) fan with state-of-the-art ...
Gas Component Transport Across the Soil-Atmosphere Interface for Gases of Different Density: Experiments and Modeling

Bahlmann, L.M.; Smits, K.M.; Heck, K.; Coltman, E.; Helmig, R.; Neuweiler, I. (Hoboken, NJ : Blackwell Publishing Ltd, 2020)

We investigate the influence of near-surface wind conditions on subsurface gas transport and on soil-atmosphere gas exchange for gases of different density. Results of a sand tank experiment are supported by a numerical ...
Identifying the flap side-edge noise contribution of a wind turbine blade section with an adaptive trailing edge

Suryadi, A.; Jätz, C.; Seume, J.R.; Herr, M. (Chichester : Wiley, 2022)

Active trailing-edge technology is a promising application for localized load alleviation of large-diameter wind turbine rotors, accomplished using one or more control surfaces in the rotor blade's outer region. This work ...
Model tests on the control behaviour of a test air supply system in open or closed-loop operation

De Buhr, L.; Fleige, H.; Seume, J. (Bristol : Institute of Physics Publishing, 2018)

The Leibniz Universität Hannover is currently establishing a new mechanical engineering campus which includes a new research building "Dynamics of Energy Conversion" (DEW). This building provides a large compressor station ...
What determines the differences found in forest edge flow between physical models and atmospheric measurements? - An LES study

Kanani, Farah; Träumner, Katja; Ruck, Bodo; Raasch, Siegfried (Stuttgart : Gebrüder Borntraeger Verlagsbuchhandlung, 2014)

A recent study has shown that Doppler lidar is a state-of-the-art method to obtain spatially and temporally resolved flow fields in forest edge flow regimes. In that study, the general flow features observed by lidar were ...

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Browsing by Subject "Wind tunnels"

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