International Journal of Aeroacoustics最新文献_第10页

An improved algorithm for liner impedance eduction in low signal-to-noise ratio flow duct 一种改进的低信噪比流道线性阻抗消除算法

IF 1 4区工程技术

International Journal of Aeroacoustics Pub Date : 2022-04-21 DOI: 10.1177/1475472X221093710

Penglin Zhang, Cheng Yang, Yu Huang

引用次数: 0

A fast 3D-MUSIC method for near-field sound source localization based on the bat algorithm 基于bat算法的3D-MUSIC近场声源快速定位方法

IF 1 4区工程技术

International Journal of Aeroacoustics Pub Date : 2022-04-21 DOI: 10.1177/1475472X221093711

C. Yang, LL Sun, H. Guo, Y.S. Wang, Y. Shao

{"title":"A fast 3D-MUSIC method for near-field sound source localization based on the bat algorithm","authors":"C. Yang, LL Sun, H. Guo, Y.S. Wang, Y. Shao","doi":"10.1177/1475472X221093711","DOIUrl":"https://doi.org/10.1177/1475472X221093711","url":null,"abstract":"To improve the computation and real-time performances of the multiple signal classification (MUSIC) algorithm in 3D space, a fast sound source localization method based on the bat algorithm (BA) and the 3D-MUSIC, called BA-based 3D-MUSIC algorithm (3D-BMUSIC), is presented in this paper. 3D-BMUSIC greatly reduces the computation load by replacing the regular grid search with the BA. First, the near-field spherical wave model is established to obtain the spectral function of the 3D-MUSIC. Then, the spectral function is defined as the fitness function, which calculates the fitness value corresponding to each bat position. Finally, the global optimal bat position with the largest fitness value, as sound source localization, is obtained by successive iteration and sorting. The simulation and experiment show that 3D-BMUSIC accurately estimates the DOA and distance of near-field sources, and the root-mean-square error (RMSE) of 3D-BMUSIC is less than that of 3D-MUSIC. In addition, 3D-BMUSIC effectively reduces the computation time by approximately 96–98%. With shorter computation time and higher efficiency, 3D-BMUSIC promotes hardware implementation and is more suitable for high-precision localization of near-field sound sources.","PeriodicalId":49304,"journal":{"name":"International Journal of Aeroacoustics","volume":null,"pages":null},"PeriodicalIF":1.0,"publicationDate":"2022-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43521341","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Computational aeroacoustics of aerofoil leading edge noise using the volume penalization-based immersed boundary methods 基于体积惩罚的浸没边界法计算机翼前缘噪声的气动声学

IF 1 4区工程技术

International Journal of Aeroacoustics Pub Date : 2022-03-01 DOI: 10.1177/1475472X221079557

Wei Ying, R. Fattah, Sinforiano Cantos, Siyang Zhong, Tatiana Kozubskaya

{"title":"Computational aeroacoustics of aerofoil leading edge noise using the volume penalization-based immersed boundary methods","authors":"Wei Ying, R. Fattah, Sinforiano Cantos, Siyang Zhong, Tatiana Kozubskaya","doi":"10.1177/1475472X221079557","DOIUrl":"https://doi.org/10.1177/1475472X221079557","url":null,"abstract":"Broadband noise due to the turbulence-aerofoil interaction, which is also called the leading edge noise, is one of the major noise sources of aircraft (including the engine). To study the noise properties numerically is a popular approach with the increasing power of computers. Conventional approaches of using body-fitted grids at the boundaries would be convoluted due to the complex geometries, which can constrain the efficiency of parametric studies. A promising approach to tackle this issue is to use the immersed boundary method (IBM). Among various IBM variants, the volume penalization (VP) approach employs a masking function to identify the immersed solid boundary, and continuous forcing terms are added to the original flow governing equations to account for the boundary conditions. It is, therefore, efficient and easy to implement into the existing computational aeroacoustics solvers. In this work, the VP-based IBM is used to simulate the leading edge noise by combining with the advanced synthetic turbulence method. The simulations are conducted for both the isolated aerofoils and cascade, and the results are compared with the well-validated body-fitted grid solutions. The viscosity effect is also highlighted by comparing the results obtained by solving both Euler and Navier–Stokes equations.","PeriodicalId":49304,"journal":{"name":"International Journal of Aeroacoustics","volume":null,"pages":null},"PeriodicalIF":1.0,"publicationDate":"2022-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42544279","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Editorial 编辑

IF 1 4区工程技术

International Journal of Aeroacoustics Pub Date : 2022-03-01 DOI: 10.1177/1475472X221087007

Tatiana Kozubskaya

引用次数: 0

Noise shielding of a deflected flap for comparing numerical predictions with flyover experiments 偏转襟翼噪声屏蔽的数值预测与立交桥实验比较

IF 1 4区工程技术

International Journal of Aeroacoustics Pub Date : 2022-03-01 DOI: 10.1177/1475472X221079560

M. Mößner, J. Delfs, M. Pott-Pollenske

引用次数: 0

Guest editor biography 特邀编辑简介

IF 1 4区工程技术

International Journal of Aeroacoustics Pub Date : 2022-03-01 DOI: 10.1177/1475472x221087008

Tatiana Kozubskaya

引用次数: 0

Adaptive RBF with hyperparameter optimisation for aeroacoustic applications 气动声学应用的超参数优化自适应RBF

IF 1 4区工程技术

International Journal of Aeroacoustics Pub Date : 2022-02-28 DOI: 10.1177/1475472X221079545

L. Burghignoli, Monica Rossetti, F. Centracchio, Giorgio Palma, U. Iemma

{"title":"Adaptive RBF with hyperparameter optimisation for aeroacoustic applications","authors":"L. Burghignoli, Monica Rossetti, F. Centracchio, Giorgio Palma, U. Iemma","doi":"10.1177/1475472X221079545","DOIUrl":"https://doi.org/10.1177/1475472X221079545","url":null,"abstract":"The present work reports an investigation on the use of adaptive metamodels based on radial basis functions (RBFs) for aeroacoustic applications of highly innovative configurations. The relevance of the topic lies on the paramount importance of metamodelling techniques within the design optimisation process of disruptive aircraft layouts. Indeed, the air traffic growth, consequently the hard environmental constraints imposed by regulations, will make a technological breakthrough, an imperative need within few years. As a consequence, the engineering community is paying particular attention to the development of innovative techniques for the design of unconventional configurations. For this class of applications, the designer cannot successfully rely on historical data or low-fidelity models, and the expensive direct simulations remain the only valuable design strategy. In this regard, it can be demonstrated that the use of surrogate models, i.e., metamodels, significantly reduces the computing costs, especially in view of a robust approach to the optimised design. In order to further improve the efficiency of metamodel-based techniques, dynamic approaches based on hyperparameter optimisation and adaptive sampling procedures have been recently developed. The case study presented here pertains the exploiting of dynamic RBF-based metamodels for noise shielding applications. The analysis of the metamodel performances and its convergence properties shows how the final number of direct simulations is significantly reduced by the hyperparameter optimisation algorithm, still strongly depending on the choice of the RBF kernel function.","PeriodicalId":49304,"journal":{"name":"International Journal of Aeroacoustics","volume":null,"pages":null},"PeriodicalIF":1.0,"publicationDate":"2022-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45315565","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 3

Boundary element analysis on the fuselage scattering of drone noise 无人机机身噪声散射的边界元分析

IF 1 4区工程技术

International Journal of Aeroacoustics Pub Date : 2022-02-26 DOI: 10.1177/1475472X221079549

Hanbo Jiang, Siyang Zhong, Xin Zhang, Xun Huang

引用次数: 1

Application of LES combined with a wave equation for the simulation of noise induced by a flow past a generic side mirror 应用LES结合波动方程模拟流过一般侧镜所引起的噪声

IF 1 4区工程技术

International Journal of Aeroacoustics Pub Date : 2022-02-23 DOI: 10.1177/1475472X221079542

E. Guseva, Y. Egorov

{"title":"Application of LES combined with a wave equation for the simulation of noise induced by a flow past a generic side mirror","authors":"E. Guseva, Y. Egorov","doi":"10.1177/1475472X221079542","DOIUrl":"https://doi.org/10.1177/1475472X221079542","url":null,"abstract":"The paper presents validation results of a hybrid simulation method for aeroacoustics in turbulent flows at low Mach numbers. The hybrid method implemented in the Ansys Fluent® CFD package applies a scale-resolving turbulence model to compute the noise sources in an incompressible flow, while the noise propagation is modeled by a wave equation formulated for the acoustic potential. The selected test case deals with a flow and a sound field around a generic side view mirror of a car. The SBES model by Menter, which belongs to the class of the RANS-LES models, is used for the flow simulation. It switches to the Large Eddy Simulation (LES) mode in separated mixing layers and recirculation zone behind the mirror as well as in the following wake, where flow develops intensive turbulence and dominating noise sources. The acoustics wave equation is formulated in the model form of Kaltenbacher et al. and is applied in the time domain. The overall calculation is performed as a transient co-simulation on the same mesh using the finite-volume discretization method for both the flow and the acoustics parts. The wave equation is advanced in time using the HHT-α method. Obtained distribution of the mean wall pressure over the mirror surface closely matches the experimental one. Rich content of the resolved turbulent vortices in the separation zone and good agreement of the calculated and measured wall pressure spectra at sensor locations downstream the mirror evidence a proper LES resolution quality of noise sources. Comparison of the computed noise spectra at the remote microphones with the experimental data demonstrates the sound propagation accuracy and validates the overall aeroacoustics simulation method.","PeriodicalId":49304,"journal":{"name":"International Journal of Aeroacoustics","volume":null,"pages":null},"PeriodicalIF":1.0,"publicationDate":"2022-02-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46966149","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Fundamental investigation using active plasma control to reduce blade–vortex interaction noise 利用主动等离子体控制降低叶片-涡流相互作用噪声的基础研究

IF 1 4区工程技术

International Journal of Aeroacoustics Pub Date : 2021-11-01 DOI: 10.1177/1475472X211052699

T. Patel, Alexander J. Lilley, Weiqi Shen, Christian Porrello, A. Schindler-Tyka, Subrata Roy, W. Lear, Steven A. E. Miller

引用次数: 4