Abstract
This paper presents a time-domain method for noise prediction of supersonic rotating sources in a moving medium. The proposed approach can be interpreted as an extensive time-domain solution for the convected permeable Ffowcs Williams and Hawkings equation, which is capable of avoiding
the Doppler singularity. The solution requires special treatment for construction of the emission surface. The derived formula can explicitly and efficiently account for subsonic uniform constant flow effects on radiated noise. Implementation of the methodology is realized through the Isom thickness noise case and high-speed impulsive noise prediction from helicopter rotors.
the Doppler singularity. The solution requires special treatment for construction of the emission surface. The derived formula can explicitly and efficiently account for subsonic uniform constant flow effects on radiated noise. Implementation of the methodology is realized through the Isom thickness noise case and high-speed impulsive noise prediction from helicopter rotors.
| Original language | English |
|---|---|
| Article number | 20170089 |
| Number of pages | 19 |
| Journal | Proceedings of the Royal Society A: Mathematical, Physical & Engineering Sciences |
| Volume | 474 |
| Issue number | 2210 |
| DOIs | |
| Publication status | Published - 1 Feb 2018 |
Keywords
- aeroacousitcs
- FW-H equation
- supersonic rotating sources
- moving medium
- Supersonic rotating sources
- Moving medium
- Acoustic analogy
- Aeroacoustics