Application of Actuator Line Model for Large Eddy Simulation of Rotor Noise Control
| Autor: | Ronith Stanly, Yann Delorme, David Greenblatt, Steven H. Frankel |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
0209 industrial biotechnology
Rotor (electric) Computer science Acoustics Aerospace Engineering 02 engineering and technology Immersed boundary method Wake 01 natural sciences 010305 fluids & plasmas law.invention Noise Flow separation 020901 industrial engineering & automation law 0103 physical sciences Noise control Actuator Large eddy simulation |
| Zdroj: | Aerospace Science and Technology |
| ISSN: | 1270-9638 |
| DOI: | 10.1016/j.ast.2020.106405 |
| Popis: | A hybrid Large Eddy Simulation (LES)/Actuator Line Model (ALM) computational approach is employed to simulate the turbulent wake of a two-bladed rotor in hover. Validations are performed for the Knight and Hefner two-bladed rotor case with comparisons to previous LES predictions using the immersed boundary method, as well as hybrid RANS-LES using the Helios code. The Ffowcs-Williams Hawkings (FWH) acoustic analogy is then used for predicting rotor noise. Predictions from the combined LES/ALM/FWH model are next validated against recent PIV wake flow and acoustic measurements for a two-bladed rotor. Finally, the LES/ALM/FWH approach is exploited to demonstrate a novel way to explore active flow control strategies to reduce rotor noise by delaying flow separation and enabling a lower rate of rotation, resulting in lower noise while maintaining thrust. |
| Databáze: | OpenAIRE |
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