### Abstract

Original language | English |
---|---|

Title of host publication | 25th AIAA/CEAS Aeroacoustics Conference |

Place of Publication | Reston, VA |

Number of pages | 10 |

DOIs | |

Publication status | Published - 18 May 2019 |

Event | AIAA/CEAS Aero-acoustics Conference 2019 - TU Delft, Delft, Netherlands Duration: 20 May 2019 → 23 May 2019 Conference number: AIAA 2019 https://www.nlr.org/aeroacoustics-2019/ |

### Conference

Conference | AIAA/CEAS Aero-acoustics Conference 2019 |
---|---|

Country | Netherlands |

City | Delft |

Period | 20/05/19 → 23/05/19 |

Internet address |

### Fingerprint

### Keywords

- turbulence theory
- rapid-distortion theory
- aero-acoustics
- trailing edge noise

### Cite this

*25th AIAA/CEAS Aeroacoustics Conference*Reston, VA. https://doi.org/10.2514/6.2019-2712

}

*25th AIAA/CEAS Aeroacoustics Conference.*Reston, VA, AIAA/CEAS Aero-acoustics Conference 2019, Delft, Netherlands, 20/05/19. https://doi.org/10.2514/6.2019-2712

**Improved trailing edge noise prediction using a generalized Rapid-distortion theory approach.** / Afsar, Mohammed Z.

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution book

TY - GEN

T1 - Improved trailing edge noise prediction using a generalized Rapid-distortion theory approach

AU - Afsar, Mohammed Z.

PY - 2019/5/18

Y1 - 2019/5/18

N2 - Goldstein, Afsar & Leib (J. Fluid Mech., vol. 736, pp. 532-569, 2013) and Goldstein-Leib- Afsar (J Fluid Mech. vol. 824, pp. 477-512) extended the Rapid-distortion theory (RDT) of turbulence to consider mean flows that are transversely sheared in the upstream state. The key feature of the theory was in relating the upstream boundary condition to physically realizable turbulence that can be controlled by an experimentalist. We summarize the theory briefly illustrating how it can be used to model trailing edge noise. We conclude by correcting the high frequency formula that GLA derived to include the next order term for the amplitude function in the WKBJ approximation for the scattered pressure. This term enters the lowest order expansion for the scattered pressure when the hydrodynamic wave number limit is taken. The predictions based on this mathematical representation have greater flexibility at high frequencies.

AB - Goldstein, Afsar & Leib (J. Fluid Mech., vol. 736, pp. 532-569, 2013) and Goldstein-Leib- Afsar (J Fluid Mech. vol. 824, pp. 477-512) extended the Rapid-distortion theory (RDT) of turbulence to consider mean flows that are transversely sheared in the upstream state. The key feature of the theory was in relating the upstream boundary condition to physically realizable turbulence that can be controlled by an experimentalist. We summarize the theory briefly illustrating how it can be used to model trailing edge noise. We conclude by correcting the high frequency formula that GLA derived to include the next order term for the amplitude function in the WKBJ approximation for the scattered pressure. This term enters the lowest order expansion for the scattered pressure when the hydrodynamic wave number limit is taken. The predictions based on this mathematical representation have greater flexibility at high frequencies.

KW - turbulence theory

KW - rapid-distortion theory

KW - aero-acoustics

KW - trailing edge noise

U2 - 10.2514/6.2019-2712

DO - 10.2514/6.2019-2712

M3 - Conference contribution book

SN - 9781624105883

BT - 25th AIAA/CEAS Aeroacoustics Conference

CY - Reston, VA

ER -