타이틀 |
Calculations of High-Speed Rotor Noise Using Euler/Kirchhoff Methods of NAL and ONERA = Research on a new device for measuring the snowy runway surface friction |
저자 |
Takashi AOYAMA, Shigeru SAITO, Toshiyuki IWAMIYA, Joelle ZIBI, Cyril POLACSEK, Olivier ROUZAUD |
Keyword |
Helicopters; HSI Noise; CFD; Kirchhoff; equation |
URL |
http://send.nal.go.jp/send/jpn/dlpdf.php3/naltr0001455t.pdf?id=NALTR0001455T |
보고서번호 |
NAL-TR-1455T |
발행년도 |
2002.12 |
출처 |
NAL (National Aerospace Laboratory of Japan) |
ABSTRACT |
High-speed impulsive (HSI) noise generated by helicopter rotors in hover or in forward flight is computed using two Euler/Kirchhoff codes, separately developed by NAL and ONERA as part of the cooperative research project between the two institutes. The project is entitled "Rotorcraft Euler Flow Simulation" and its main purpose is to validate the Euler/Kirchhoff codes in non-lifting delocalized test cases. The pressure distributions on the blade surface computed by the Euler codes are compared before the analysis of aeroacoustic results provided by both Kirchhoff codes. In hover, the computations are conducted using three types of grids |