Improvement of airfoil trailing edge bluntness noise model

Wei Jun Zhu, Wen Zhong Shen, Jens Nørkær Sørensen, Giorgos Leloudas

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Abstract

In this article, airfoil trailing edge bluntness noise is investigated using both computational aero-acoustic and semi-empirical approach. For engineering purposes, one of the most commonly used prediction tools for trailing edge noise are based on semi-empirical approaches, for example, the Brooks, Pope, and Marcolini airfoil noise prediction model developed by Brooks, Pope, and Marcolini (NASA Reference Publication 1218, 1989). It was found in previous study that the Brooks, Pope, and Marcolini model tends to over-predict noise at high frequencies. Furthermore, it was observed that this was caused by a lack in the model to predict accurately noise from blunt trailing edges. For more physical understanding of bluntness noise generation, in this study, we also use an advanced in-house developed high-order computational aero-acoustic technique to investigate the details associated with trailing edge bluntness noise. The results from the numerical model form the basis for an improved Brooks, Pope, and Marcolini trailing edge bluntness noise model.
Original languageEnglish
JournalAdvances in Mechanical Engineering
Volume8
Issue number2
Pages (from-to)1-12
Number of pages12
ISSN1687-8132
DOIs
Publication statusPublished - 2016

Bibliographical note

Creative Commons CC-BY: This article is distributed under the terms of the Creative Commons Attribution 3.0 License (http://www.creativecommons.org/licenses/by/3.0/) which permits any use, reproduction and distribution of the work without further permission provided the original work is attributed as specified on the SAGE and Open Access pages (https://us.sagepub.com/en-us/nam/
open-access-at-sage).

Keywords

  • Wind turbine noise
  • Trailing edge bluntness noise
  • Semi-empirical noise prediction model
  • Computational aero-acoustics
  • Mechanical Engineering

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