{"title":"Numerical Study of the Features of the Propagation of Acoustic Disturbances in an Unregulated Supersonic Air Intake","authors":"V. A. Shorstov","doi":"10.1134/s2070048224010095","DOIUrl":null,"url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>Using the Vortex and Wave Tracker program, a number of calculations are carried out to identify the peculiarities of the propagation of acoustic disturbances in the channel of a supersonic air intake with a high level of flow inhomogeneity and turbulence. The problems for a cylindrical channel with a uniform flow and the selected unregulated air intake are considered. The calculations are performed with and without the vortex-resolving approach, as well as with and without fan disturbances. The acoustic disturbances generated by the flow and the evolving disturbances of the fan are separated and considered by plotting phase velocity diagrams and comparing the results of different calculations. This study contains descriptions of the features of each of the components. The calculations show the weak influence of intense turbulence on the rate of attenuation of the fan disturbances and the strong influence on their structure, including a change in frequency. It is noted that the rapid transformation of the initial structure of disturbances should affect the operation of sound-absorbing structures and the process of noise shielding by the airframe elements. It should be noted that the flow in a practically acceptable air intake will be more homogeneous and less turbulent, which requires additional calculations before generalizing the conclusions.</p>","PeriodicalId":38050,"journal":{"name":"Mathematical Models and Computer Simulations","volume":null,"pages":null},"PeriodicalIF":0.0000,"publicationDate":"2024-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Mathematical Models and Computer Simulations","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1134/s2070048224010095","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"Mathematics","Score":null,"Total":0}
引用次数: 0
Abstract
Using the Vortex and Wave Tracker program, a number of calculations are carried out to identify the peculiarities of the propagation of acoustic disturbances in the channel of a supersonic air intake with a high level of flow inhomogeneity and turbulence. The problems for a cylindrical channel with a uniform flow and the selected unregulated air intake are considered. The calculations are performed with and without the vortex-resolving approach, as well as with and without fan disturbances. The acoustic disturbances generated by the flow and the evolving disturbances of the fan are separated and considered by plotting phase velocity diagrams and comparing the results of different calculations. This study contains descriptions of the features of each of the components. The calculations show the weak influence of intense turbulence on the rate of attenuation of the fan disturbances and the strong influence on their structure, including a change in frequency. It is noted that the rapid transformation of the initial structure of disturbances should affect the operation of sound-absorbing structures and the process of noise shielding by the airframe elements. It should be noted that the flow in a practically acceptable air intake will be more homogeneous and less turbulent, which requires additional calculations before generalizing the conclusions.
期刊介绍：
Mathematical Models and Computer Simulations is a journal that publishes high-quality and original articles at the forefront of development of mathematical models, numerical methods, computer-assisted studies in science and engineering with the potential for impact across the sciences, and construction of massively parallel codes for supercomputers. The problem-oriented papers are devoted to various problems including industrial mathematics, numerical simulation in multiscale and multiphysics, materials science, chemistry, economics, social, and life sciences.
求助内容：
应助结果提醒方式：
京公网安备 11010802042870号
