Pub Date : 2019-11-01DOI: 10.36336/akustika201934152
S. Luzzi, A. Vasilyev
The problems connected with acoustical monitoring, planning and design of urban territories are considered. Approaches to acoustical monitoring of urban territories are described. Peculiarities of acoustical planning and design of urban territories are described taking to account European and Russian experience. The holistic approach to planning and acoustical design of landscapes is suggested. Smart solutions are considered as a part of the global comfort scheme: smart urban planning shows various connections with smart noise action plans. Examples of smart solutions are presented. The results of work are allowing to make more comfortable acoustical environment in urban territories and to reduce negative impact of noise to the human health more efficiently.
{"title":"ACOUSTICAL MONITORING, PLANNING AND DESIGN OF URBAN TERRITORIES","authors":"S. Luzzi, A. Vasilyev","doi":"10.36336/akustika201934152","DOIUrl":"https://doi.org/10.36336/akustika201934152","url":null,"abstract":"The problems connected with acoustical monitoring, planning and design of urban territories are considered. Approaches to acoustical monitoring of urban territories are described. Peculiarities of acoustical planning and design of urban territories are described taking to account European and Russian experience. The holistic approach to planning and acoustical design of landscapes is suggested. Smart solutions are considered as a part of the global comfort scheme: smart urban planning shows various connections with smart noise action plans. Examples of smart solutions are presented. The results of work are allowing to make more comfortable acoustical environment in urban territories and to reduce negative impact of noise to the human health more efficiently.","PeriodicalId":42295,"journal":{"name":"Akustika","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44500196","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-11-01DOI: 10.36336/akustika20193418
V. Asminin, E. Druzhinina, S. Sazonova, D. Osmolovsky
This research falls in the field of machine-building, construction and woodworking, concerns sound suppression panels for cabins, enclosures, soundproofing acoustic shields, temporary room partitions, etc., and solves the problem of making sound suppression panels easy for installation and dismantling, as well as transportable and storable, without reduction in noise suppression effectiveness. For thispurpose, pads connected with two parallel sheets are placed between them. The pads form a layer which cross section is a chain of rhombuses, and the parallel sheets have curvature lineson the level of the rhombuses connection. The portable lightweight sound suppression panel (SSP)with a diamond-shaped structure is made of organic and polymer materials, such as pulp-and-paper materials, fabrics and polymer films which can significantly reduce the structure weight.
{"title":"DEVELOPMENT AND APPL.ICATION OF A PORTABLE LIGHTWEIGHT SOUND SUPRESSION PANEL TO REDUCE NOISE AT PERMANENT AND TEMPORARY WORKPLACES IN THE MANUFACTURING AND REPAIR WORKSHOPS","authors":"V. Asminin, E. Druzhinina, S. Sazonova, D. Osmolovsky","doi":"10.36336/akustika20193418","DOIUrl":"https://doi.org/10.36336/akustika20193418","url":null,"abstract":"This research falls in the field of machine-building, construction and woodworking, concerns sound suppression panels for cabins, enclosures, soundproofing acoustic shields, temporary room partitions, etc., and solves the problem of making sound suppression panels easy for installation and dismantling, as well as transportable and storable, without reduction in noise suppression effectiveness. For thispurpose, pads connected with two parallel sheets are placed between them. The pads form a layer which cross section is a chain of rhombuses, and the parallel sheets have curvature lineson the level of the rhombuses connection. The portable lightweight sound suppression panel (SSP)with a diamond-shaped structure is made of organic and polymer materials, such as pulp-and-paper materials, fabrics and polymer films which can significantly reduce the structure weight.","PeriodicalId":42295,"journal":{"name":"Akustika","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48942195","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-11-01DOI: 10.36336/akustika201934113
A. Vasilyev
Increased level of automobile low-frequency noise may cause significant environmental pollution, driver and passenger discomfort etc. For automobile equipped with internal combustion engine forming of either internal or external noise is mainly caused by engine operation. Approaches to automobile low-frequency noise reduction are suggested using active noise control method. The different variants of principal schemes and constructions of electronic units of forming required vibroacoustic characteristic of active noise control system were developed by the author either for complex noise reduction of experimental unit or for investigation of the separate noise sources reduction. Intercommunication of engine compartment and passenger compartment and coherent low-frequency sound radiation by air-suctioning pipe and exhaust pipe are taking into consideration. Construction of active noise control unit designed by author for complex reduction of exhaust and intake engine low-frequency noise is described. The results described in this paper may be useful for further development and application of constructions of active noise control systems as for efficient complex engine noise reduction or for reduction of the separate automobile engine noise sources.
{"title":"AUTOMOBILE INTERNAL COMBUSTION ENGINE LOW FREQUENCY NOISE REDUCTION USING ACTIVE NOISE CONTROL SOLUTIONS","authors":"A. Vasilyev","doi":"10.36336/akustika201934113","DOIUrl":"https://doi.org/10.36336/akustika201934113","url":null,"abstract":"Increased level of automobile low-frequency noise may cause significant environmental pollution, driver and passenger discomfort etc. For automobile equipped with internal combustion engine forming of either internal or external noise is mainly caused by engine operation. Approaches to automobile low-frequency noise reduction are suggested using active noise control method. The different variants of principal schemes and constructions of electronic units of forming required vibroacoustic characteristic of active noise control system were developed by the author either for complex noise reduction of experimental unit or for investigation of the separate noise sources reduction. Intercommunication of engine compartment and passenger compartment and coherent low-frequency sound radiation by air-suctioning pipe and exhaust pipe are taking into consideration. Construction of active noise control unit designed by author for complex reduction of exhaust and intake engine low-frequency noise is described. The results described in this paper may be useful for further development and application of constructions of active noise control systems as for efficient complex engine noise reduction or for reduction of the separate automobile engine noise sources.","PeriodicalId":42295,"journal":{"name":"Akustika","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45913369","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-11-01DOI: 10.36336/akustika20193466
P. Moshkov, V. Samokhin, A. Yakovlev
A light aircraft community noise problem was considered. Basic aircraft noise sources were described. A model was presented to evaluate engine-propeller aircraft power plant noise that may be used while estimating both light aircraft community noise and flight paths providing aircraft inaudibility in the housing system area adjacent to an airfield. An effective engineering analysis agreement of experimental and design power plant noise data has been given. Major light aircraft communication noise reduction methods have been considered. The principal future investigation directions were stated to provide scientific-and-engineering experience in developing present-day low-noise light aircraft has been developed.
{"title":"ABOUT THE COMMUNITY NOISE PROBLEM OF THE LIGHT PROPELLER AIRCRAFT","authors":"P. Moshkov, V. Samokhin, A. Yakovlev","doi":"10.36336/akustika20193466","DOIUrl":"https://doi.org/10.36336/akustika20193466","url":null,"abstract":"A light aircraft community noise problem was considered. Basic aircraft noise sources were described. A model was presented to evaluate engine-propeller aircraft power plant noise that may be used while estimating both light aircraft community noise and flight paths providing aircraft inaudibility in the housing system area adjacent to an airfield. An effective engineering analysis agreement of experimental and design power plant noise data has been given. Major light aircraft communication noise reduction methods have been considered. The principal future investigation directions were stated to provide scientific-and-engineering experience in developing present-day low-noise light aircraft has been developed.","PeriodicalId":42295,"journal":{"name":"Akustika","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45801943","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-11-01DOI: 10.36336/akustika2019347
M. Butorina, L. Drozdova, D. Kuklin
Noise mapping is the best way to present information on the acoustic pollution. To design noise protection measures, authors use modern software package SoundPLAN, which is based on the up-to-date normative documentation and scientific researches. The program allows importing the results of calculations to Autodesk tools. Improving the efficiency of the noise protection design process is executed through the implementation of building information modeling (BIM). Data exchange between SoundPLAN, AutoCAD 3D or Revit and Navisworks is used in the development of building information model. In the article we present a new approach to noise reduction through implementation of noise data into the overall information model of the infrastructure or building project. BIM helps to track the collision of calculated noise levels with residential buildings, protected premises and work places. It lays a basis for the sound proof allocation of work places and development of protection measures. BIM also serves as a support tool for the design process of sound protection barriers, since it helps to avoid interconnection of noise barriers basement with engineering networks or paste a barrier in the proper place to provide its efficiency.
{"title":"IMPLEMENTATION OF NOISE DATA INTO BUILDING INFORMATION MODEL FOR TRANSPORT AND UNDUSTRIAL NOISE REDUCTION","authors":"M. Butorina, L. Drozdova, D. Kuklin","doi":"10.36336/akustika2019347","DOIUrl":"https://doi.org/10.36336/akustika2019347","url":null,"abstract":"Noise mapping is the best way to present information on the acoustic pollution. To design noise protection measures, authors use modern software package SoundPLAN, which is based on the up-to-date normative documentation and scientific researches. The program allows importing the results of calculations to Autodesk tools. Improving the efficiency of the noise protection design process is executed through the implementation of building information modeling (BIM). Data exchange between SoundPLAN, AutoCAD 3D or Revit and Navisworks is used in the development of building information model. In the article we present a new approach to noise reduction through implementation of noise data into the overall information model of the infrastructure or building project. BIM helps to track the collision of calculated noise levels with residential buildings, protected premises and work places. It lays a basis for the sound proof allocation of work places and development of protection measures. BIM also serves as a support tool for the design process of sound protection barriers, since it helps to avoid interconnection of noise barriers basement with engineering networks or paste a barrier in the proper place to provide its efficiency.","PeriodicalId":42295,"journal":{"name":"Akustika","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44014433","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-11-01DOI: 10.36336/akustika201934157
V. Goncharov, M. Goncharov, S. Prasolov, S. Goncharov
this article deals with the problem of the influence of gas turbine equipment on its energy efficiency, environmental performance and acoustic properties of thermal mini heat power plants. Environmental aspects of the introduction of gas turbine technologies in heat and power industry are very important. The paper considers technological limitations of the wide use of gas turbine equipment and ways to solve them. The article discusses the developed original technology to improve the performance characteristics of parts that have exhausted their service life of aviation gas turbine engines, with the aim of using them as heat installations in heat and power engineering with improved acoustic performance. Constructive solutions are proposed for upgrading the serial installation of PVD coatings, for the possibility of applying nanostructured films according to the technology proposed in the article, with an increase in its economic and environmental performance.
{"title":"APPLICATION OF PVD COATINGS TO INCREASE THE SERVICE LIFE OF GAS TURBINE MINI HEAT POWER PLANTS WITH IMPROVED ACOUSTIC PERFORMANCE","authors":"V. Goncharov, M. Goncharov, S. Prasolov, S. Goncharov","doi":"10.36336/akustika201934157","DOIUrl":"https://doi.org/10.36336/akustika201934157","url":null,"abstract":"this article deals with the problem of the influence of gas turbine equipment on its energy efficiency, environmental performance and acoustic properties of thermal mini heat power plants. Environmental aspects of the introduction of gas turbine technologies in heat and power industry are very important. The paper considers technological limitations of the wide use of gas turbine equipment and ways to solve them. The article discusses the developed original technology to improve the performance characteristics of parts that have exhausted their service life of aviation gas turbine engines, with the aim of using them as heat installations in heat and power engineering with improved acoustic performance. Constructive solutions are proposed for upgrading the serial installation of PVD coatings, for the possibility of applying nanostructured films according to the technology proposed in the article, with an increase in its economic and environmental performance.","PeriodicalId":42295,"journal":{"name":"Akustika","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43195858","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-11-01DOI: 10.36336/akustika201934107
B. Kutyrin, Yu M Elkin
The main purpose of this paper is to study the causes and development of estimation procedure, as well as forecasting of an increase of traffic stream noise and electromagnetic action on residential buildings due to reduction in the efficiency of panels during their life cycle. Field observation which confirmed a sufficient similarity of the dynamics of reducing the acoustic panel efficiency with the procedure estimates were carried out in the process. The article also estimates risks of accidents and forecasting of cost increases that negatively affect the efficiency of AP. Recommendations for each of the stages of the panel life cycle of were developed and given according to the results of the study.
{"title":"ASSESSMENT OF NOISE AND ELECTROMAGNETIC EFFECTS OF TRAFFIC FLOW ON RESIDENTIAL BUILDINGS AT THE DESIGN, CONSTRUCTION AND EXPLOITATION OF ACOUSTIC SCREENS","authors":"B. Kutyrin, Yu M Elkin","doi":"10.36336/akustika201934107","DOIUrl":"https://doi.org/10.36336/akustika201934107","url":null,"abstract":"The main purpose of this paper is to study the causes and development of estimation procedure, as well as forecasting of an increase of traffic stream noise and electromagnetic action on residential buildings due to reduction in the efficiency of panels during their life cycle. Field observation which confirmed a sufficient similarity of the dynamics of reducing the acoustic panel efficiency with the procedure estimates were carried out in the process. The article also estimates risks of accidents and forecasting of cost increases that negatively affect the efficiency of AP. Recommendations for each of the stages of the panel life cycle of were developed and given according to the results of the study.","PeriodicalId":42295,"journal":{"name":"Akustika","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46810120","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-11-01DOI: 10.36336/akustika20193479
I. Yaitskov, A. Chukarin, Dmitry Motrenko
Milling recessing machines are designed to select mortises with end mills of the rectangular-shaped sockets. To the characteristic features of these machines, distinguishing them from the machines of the milling group is the additional oscillatory movement of the milling cutter on the chain ridged machines. The sockets are selected with the rectangular shape of the milling chain. These machines are operated at constant spindle speeds. Therefore, in these machines there are no multistage gear boxes with a large number of the spindles. These features lead to the fact that the vibrations of the cases of the speed boxes of woodworking machines (unlike metal-cutting machines) are much less and, accordingly, the intensity of their sound radiation is also less. The frequency of the rotation of the cutting tool is significantly higher. Therefore, it can be assumed that the main source of the noise that exceeds sanitary standards is the workpiece cutting tool system. The purpose of theoretical studies with obtained results show the analytical dependencies of the active sound pressure levels created by the cutting tool of the milling recessing and chain mortise machines providing for geometrical, physic-mechanical parameters of the tool and technological cutting conditions. The used acoustic source models are monocle for the tool of the milling recessing machines and a linear source for the milling chain and the noise levels obtained on their basis showed that for engineering calculation it is necessary to determine the oscillation velocities of the sources on their own oscillation modes. The speeds of the oscillations are determined from the differential oscillation equations; the solutions are obtained taking into account the cleat boundary conditions. The calculation of the noise spectra makes it possible at the design stage of both similar equipment and technological processes of the wood processing to determine the magnitudes over the maximum allowable values and in fact at the same stage to design noise protection systems.
{"title":"THEORETICAL RESEARCH OF THE VIBROACOUSTIC DYNAMICS OF THE CUTTING TOOLS FOR MILLING RECESSING AND CHAIN MORTISE WOODWORKING MACHINES","authors":"I. Yaitskov, A. Chukarin, Dmitry Motrenko","doi":"10.36336/akustika20193479","DOIUrl":"https://doi.org/10.36336/akustika20193479","url":null,"abstract":"Milling recessing machines are designed to select mortises with end mills of the rectangular-shaped sockets. To the characteristic features of these machines, distinguishing them from the machines of the milling group is the additional oscillatory movement of the milling cutter on the chain ridged machines. The sockets are selected with the rectangular shape of the milling chain. These machines are operated at constant spindle speeds. Therefore, in these machines there are no multistage gear boxes with a large number of the spindles. These features lead to the fact that the vibrations of the cases of the speed boxes of woodworking machines (unlike metal-cutting machines) are much less and, accordingly, the intensity of their sound radiation is also less.\u0000The frequency of the rotation of the cutting tool is significantly higher. Therefore, it can be assumed that the main source of the noise that exceeds sanitary standards is the workpiece cutting tool system. The purpose of theoretical studies with obtained results show the analytical dependencies of the active sound pressure levels created by the cutting tool of the milling recessing and chain mortise machines providing for geometrical, physic-mechanical parameters of the tool and technological cutting conditions. The used acoustic source models are monocle for the tool of the milling recessing machines and a linear source for the milling chain and the noise levels obtained on their basis showed that for engineering calculation it is necessary to determine the oscillation velocities of the sources on their own oscillation modes. The speeds of the oscillations are determined from the differential oscillation equations; the solutions are obtained taking into account the cleat boundary conditions. The calculation of the noise spectra makes it possible at the design stage of both similar equipment and technological processes of the wood processing to determine the magnitudes over the maximum allowable values and in fact at the same stage to design noise protection systems.","PeriodicalId":42295,"journal":{"name":"Akustika","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46565583","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-11-01DOI: 10.36336/akustika201934166
Vitaly Kolykhalin
The method of decrease impact noise between of wheel pairs rail transport and rail joints being main sources of noise is analyzed. The spectrum of such noise reaches a maximum in an octave strip of 31,5 Hz and sharply decreases in a strip of 1 kHz. The practical implementation dipole effect can be received by formation a pair of the knock impulse sources when the direction of acoustical axes is along the railway under small angle. The compensatory effect when one rail joint for example right moves according left joint in other rail on the distance d having half of wave length of the basic low-frequency range of shock impulses is reached. The system of standing waves in the interval d by an antiphase pair of sources with coherent components in the basic frequency 31,5 Hz and odd harmonics is formed. The new additional effect to noise reduction by replacement the rectangular rail joint edges on the oblique-angled rail joints having 45 degree edge angle is carried out.
{"title":"ABOUT OF THE METHOD OF DECREASE RAIL TRANSPORT IMPACT NOISE IN LOW FREQUENCY RANGE","authors":"Vitaly Kolykhalin","doi":"10.36336/akustika201934166","DOIUrl":"https://doi.org/10.36336/akustika201934166","url":null,"abstract":"The method of decrease impact noise between of wheel pairs rail transport and rail joints being main sources of noise is analyzed. The spectrum of such noise reaches a maximum in an octave strip of 31,5 Hz and sharply decreases in a strip of 1 kHz. The practical implementation dipole effect can be received by formation a pair of the knock impulse sources when the direction of acoustical axes is along the railway under small angle. The compensatory effect when one rail joint for example right moves according left joint in other rail on the distance d having half of wave length of the basic low-frequency range of shock impulses is reached. The system of standing waves in the interval d by an antiphase pair of sources with coherent components in the basic frequency 31,5 Hz and odd harmonics is formed. The new additional effect to noise reduction by replacement the rectangular rail joint edges on the oblique-angled rail joints having 45 degree edge angle is carried out.","PeriodicalId":42295,"journal":{"name":"Akustika","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45274167","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-11-01DOI: 10.36336/akustika20193430
I. Khramtsov, O. Kustov, V. Palchikovskiy, R. Bulbovich
For the first time, the acoustic characteristics of a full-scale double-layer sample of acoustic liner were determined by numerical simulation of physical processes in an normal incident interferometer. The double-layer liner sample consisted of 14 honeycomb cells and 70 perforation holes. The dimensions of the honeycomb cells and perforation holes correspond to the acoustic liners used in the ducts of aircraft engines. Numerical simulation was carried out based on solution of the unsteady Navier-Stokes equations in three-dimensional formulation. A high degree of agreement of the acoustic characteristics obtained by numerical simulation with experiment was noted.
{"title":"DETERMINATION OF ACOUSTIC CHARACTERISTICS OF THE DOUBLE-LAYER HONEYCOMB LINER BASED ON NUMERICAL SIMULATION","authors":"I. Khramtsov, O. Kustov, V. Palchikovskiy, R. Bulbovich","doi":"10.36336/akustika20193430","DOIUrl":"https://doi.org/10.36336/akustika20193430","url":null,"abstract":"For the first time, the acoustic characteristics of a full-scale double-layer sample of acoustic liner were determined by numerical simulation of physical processes in an normal incident interferometer. The double-layer liner sample consisted of 14 honeycomb cells and 70 perforation holes. The dimensions of the honeycomb cells and perforation holes correspond to the acoustic liners used in the ducts of aircraft engines. Numerical simulation was carried out based on solution of the unsteady Navier-Stokes equations in three-dimensional formulation. A high degree of agreement of the acoustic characteristics obtained by numerical simulation with experiment was noted.","PeriodicalId":42295,"journal":{"name":"Akustika","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41801900","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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