Aeroacoustic Simulations of an Axial Fan with Modelled Turbulent Inflow Conditions

Author:

Dietrich Philipp1,Schneider Marc1

Affiliation:

1. ebm-papst GmbH & Co. KG, Bachmühle 2, 74673 Mulfingen, Germany

Abstract

In applications, the acoustics of fans can differ significantly from the measurements of the standalone fan. This is due to disturbed inflow conditions, for example, caused by a heat exchanger upstream of an axial fan. Resolving the complex geometry and dimensions of typical heat exchangers in aeroacoustic scale-resolving simulations leads to a very high computation effort, which is currently not economically feasible. Turbulence reconstruction tools, such as the FRPM, provide the possibility to model the turbulent inflow conditions, thereby avoiding the representation of the heat exchanger in the aeroacoustic simulations. This approach is tested on a benchmark experiment of a ducted fan with an upstream turbulence grid.

Publisher

MDPI AG

Subject

Mechanical Engineering,Energy Engineering and Power Technology,Aerospace Engineering

Reference13 articles.

1. Lucius, A., Hütter, S., Dietrich, P., Schneider, M., Lehmann, M., and Geyer, T. (2018, January 18–20). Experimental and numerical investigation of axial fan aeroacoustics at disturbed inflow conditions. Proceedings of the FAN2018, Darmstadt, Germany.

2. Ewert, R. The Fast Random Particle-Mesh Method to realize unsteady turbulent sound sources and velocity fields for CAA applications; In Proceedings of the 13th AIAA/CEAS Aeroacoustic Conference, Rome, Italy, 21–23 May 2007.

3. Liberson, L., Lummer, M., Mößner, M., Ewert, R., and Delfs, J.W. Application of a Discontinuous Galerkin based CAA solver for broadband noise prediction; In Proceedings of the FAN2018, Darmstadt, Germany, 18–20 April 2018.

4. Dillmann, A. (2018). New Results in Numerical and Experimental Fluid Mechanics XI, Notes on Numerical Fluid Mechanics and Multidisciplinary Design 136, Springer.

5. Dietrich, P., and Schneider, M. (2019, January 18–20). Modellierung der Akustik von Axialventilatoren unter gestörter Zuströmung. Proceedings of the DAGA2019, Rostock, Germany.

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