@inproceedings{4d79e5a9a9b64098b5a4f4cb60a0a382,
title = "Computational aeroacoustic-noise prediction for helicopter rotor in forward flight",
abstract = "A hybrid method for computational prediction of aeroacoustic noise from a helicopter rotor in forward flight is presented and investigated. This method is a combination of URNS (Unsteady Reynolds-averaged Naiver-Stokes) Method and FW-Hpds(Ffowcs Williams-Hawkings equation with Penetrable Data Surface) method. The aerodynamic flowfield near rotor blades is calculated by solving URNS equations with a cell-centered finite-volume scheme. The URNS equations are solved on a moving overset grid system that allows for prescribed pitching and flapping motion of rotor blades. The far-field noise is predicted by using the method based on Ffowcs Williams-Hawkings equation with penetrable data surface (FW-Hpds) covering the nonlinear flow region. The computed results are compared with experimental data and reasonably good agreement has been achieved. The results are also compared with that of Euler/FW-Hpds method. This comparison shows that the present method based on URNS equations is more accurate for the prediction of High-Speed Impulsive (HSI) noise and Blade-Vortex Interaction (BVI) noise generated by helicopter rotor in forward flight.",
author = "Han, {Zhong Hua} and Zhang, {Ke Shi} and Song, {Wen Ping} and Qiao, {Zhi De}",
year = "2008",
doi = "10.2514/6.2008-46",
language = "英语",
isbn = "9781563479373",
series = "46th AIAA Aerospace Sciences Meeting and Exhibit",
publisher = "American Institute of Aeronautics and Astronautics Inc.",
booktitle = "46th AIAA Aerospace Sciences Meeting and Exhibit",
}