Abstract
Increasing environmental pressures have driven a renewed interest in the open rotor concept. However, their large noise emissions have limited their integration to modern aircraft. Therefore, to ensure designs meet current and future noise emission targets, the effects of various design choices must be understood from the preliminary design stage. As a result, this research performs a parametric study of the effect of blade count and tip speed on open rotor noise. Considering a large number of design combinations of both tip speed and blade count, low-order models are used to demonstrate the strong coupling between open rotor noise and these design features. It is shown that generally, the noise reduces for increasing blade count and decreasing tip speed. However, due to the strong interactions between blade rows, this is not a simple relation. A number of optimisations of the open rotor configuration are also presented. These further highlight the complex relationship between the noise and the open rotor configuration. The optimisations also demonstrate the ability to reduce open rotor noise at the terminal areas under additional constraints.
Original language | English |
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Title of host publication | 25th AIAA/CEAS Aeroacoustics Conference |
Publication status | Accepted/In press - 29 Apr 2019 |
Event | 25TH AIAA/CEAS Aeroacoustics Conference - Delft, Netherlands Duration: 20 May 2019 → 23 May 2019 |
Conference
Conference | 25TH AIAA/CEAS Aeroacoustics Conference |
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Abbreviated title | Aeroacoustics 2019 |
Country/Territory | Netherlands |
City | Delft |
Period | 20/05/19 → 23/05/19 |