Investigation on accuracy of numerical simulation of aerodynamic noise of single-stage axial fan

Lu, Huabing and Xiao, Youhong and Liu, Zhigang and Yuan, Ye and Zhou, Peilin and Yang, Guanghui (2023) Investigation on accuracy of numerical simulation of aerodynamic noise of single-stage axial fan. Physics of Fluids, 35 (11). 115136. ISSN 1070-6631 (https://doi.org/10.1063/5.0174731)

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Abstract

The prediction accuracy of turbomachinery aerodynamic noise, particularly in relation to broadband noise with uncertain factors, has long been a challenging issue. Previous studies have not fully comprehended the factors influencing its prediction accuracy, lacking an objective and comprehensive evaluation method. An improved approach combining orthogonal experiment design and principal component analysis is employed to address these limitations. The evaluation method expands the noise metrics and provides a comprehensive assessment of the accuracy of numerical simulation for aerodynamic noise. The evaluation method is utilized to optimize and quantitatively analyze the impact of the refinement size of the core area on noise prediction for single-stage axial fans. Subsequently, the three metrics, namely, Z1, Z2, and broadband noise Z3, are integrated using PCA to form a new integrated optimal metric Ztotal. The influence of different refinement sizes, particularly on Ztotal, is quantitatively examined. The findings reveal that the mesh size of the stator wake (D area) exhibits the most significant influence on noise prediction accuracy, with a calculated weight of 81.3% on noise accuracy. Furthermore, a comprehensive investigation is conducted on the influence of turbulence models and the wall Y+ value on aerodynamic noise. Detached-eddy simulation and large eddy simulation demonstrate effective capabilities in simulating both upstream and downstream turbulent flow characteristics of the stator, enabling accurate prediction of broadband noise. This study presents a set of numerical simulation schemes that achieve precise prediction of turbomachinery aerodynamic noise.

ORCID iDs

Lu, Huabing, Xiao, Youhong, Liu, Zhigang, Yuan, Ye, Zhou, Peilin ORCID logoORCID: https://orcid.org/0000-0003-4808-8489 and Yang, Guanghui;
  • Item type:Article
    ID code:88491
    Dates:
    Date
    Event
    21 November 2023
    Published
    31 October 2023
    Accepted
    2 September 2023
    Submitted
    Notes:Copyright © 2023 American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics. The following article appeared in Lu, H, Xiao, Y, Liu, Z, Yuan , Y, Zhou, P & Yang , G 2023, 'Investigation on accuracy of numerical simulation of aerodynamic noise of single-stage axial fan', Physics of Fluids, vol. 35, no. 11, 115136, and may be found at https://doi.org/10.1063/5.0174731.
    Subjects:Naval Science > Naval architecture. Shipbuilding. Marine engineering
    Department:Faculty of Engineering > Naval Architecture, Ocean & Marine Engineering
    Depositing user: Pure Administrator
    Date deposited:19 Mar 2024 13:01
    Last modified:11 Nov 2024 14:15
    URI:https://strathprints.strath.ac.uk/id/eprint/88491
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