Analysis of air flow formation in a nozzle valve
Objective. To accurately assess the impact of ventilation systems on the acoustic environment of a room, it is necessary to determine the length of the vortex zone that forms as the air flow passes through throttling devices. The article examines the results of modeling a nozzle valve with a variabl...
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| Format: | Article |
| Language: | Russian |
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Dagestan State Technical University
2025-01-01
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| Series: | Вестник Дагестанского государственного технического университета: Технические науки |
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| Online Access: | https://vestnik.dgtu.ru/jour/article/view/1629 |
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| author | D. V. Abramkina A. O. Ivanova D. F. Karpov Kh. M. Vafaeva A. S. Voronov |
| author_facet | D. V. Abramkina A. O. Ivanova D. F. Karpov Kh. M. Vafaeva A. S. Voronov |
| author_sort | D. V. Abramkina |
| collection | DOAJ |
| description | Objective. To accurately assess the impact of ventilation systems on the acoustic environment of a room, it is necessary to determine the length of the vortex zone that forms as the air flow passes through throttling devices. The article examines the results of modeling a nozzle valve with a variable cross-section during its opening and closing processes. Method. The analysis of airflow formation scenarios at various positions of the control diaphragm was performed using Computational Fluid Dynamics (CFD) in the Ansys Fluent software package. Result. As the cross-sectional flow area decreases, a sharp local increase in airflow velocity is observed, along with the formation of vortex zones and reverse flows resulting from the ejection effect. Conclusion. The presence of complex turbulent flows in the ventilation network leads to increased sound pressure levels and noise penetrating the serviced space. Significant deviations from the recommended maximum velocity, depending on the valve opening scenario, highlight the importance of considering throttling devices in acoustic calculations. Analyzing the length of the flow stabilization section enables optimal placement of the nozzle valve, preventing the vortex zone from breaking up due to the combined influence of local resistances (air distribution devices, tees, bends, and constant airflow valves). To reduce the risk of increased noise, it is recommended to position the nozzle valve on a straight duct section, with a length of at least one duct diameter before and three duct diameters after the throttling device. |
| format | Article |
| id | doaj-art-820008746dae46df9f9b6b62df606be9 |
| institution | DOAJ |
| issn | 2073-6185 2542-095X |
| language | Russian |
| publishDate | 2025-01-01 |
| publisher | Dagestan State Technical University |
| record_format | Article |
| series | Вестник Дагестанского государственного технического университета: Технические науки |
| spelling | doaj-art-820008746dae46df9f9b6b62df606be92025-08-20T03:21:03ZrusDagestan State Technical UniversityВестник Дагестанского государственного технического университета: Технические науки2073-61852542-095X2025-01-0151417117810.21822/2073-6185-2024-51-4-171-178942Analysis of air flow formation in a nozzle valveD. V. Abramkina0A. O. Ivanova1D. F. Karpov2Kh. M. Vafaeva3A. S. Voronov4Moscow State University of Civil EngineeringMoscow State University of Civil EngineeringVologda State UniversityPeter the Great St.Petersburg Polytechnic UniversityPeoples' Friendship University of Russia named after Patrice LumumbaObjective. To accurately assess the impact of ventilation systems on the acoustic environment of a room, it is necessary to determine the length of the vortex zone that forms as the air flow passes through throttling devices. The article examines the results of modeling a nozzle valve with a variable cross-section during its opening and closing processes. Method. The analysis of airflow formation scenarios at various positions of the control diaphragm was performed using Computational Fluid Dynamics (CFD) in the Ansys Fluent software package. Result. As the cross-sectional flow area decreases, a sharp local increase in airflow velocity is observed, along with the formation of vortex zones and reverse flows resulting from the ejection effect. Conclusion. The presence of complex turbulent flows in the ventilation network leads to increased sound pressure levels and noise penetrating the serviced space. Significant deviations from the recommended maximum velocity, depending on the valve opening scenario, highlight the importance of considering throttling devices in acoustic calculations. Analyzing the length of the flow stabilization section enables optimal placement of the nozzle valve, preventing the vortex zone from breaking up due to the combined influence of local resistances (air distribution devices, tees, bends, and constant airflow valves). To reduce the risk of increased noise, it is recommended to position the nozzle valve on a straight duct section, with a length of at least one duct diameter before and three duct diameters after the throttling device.https://vestnik.dgtu.ru/jour/article/view/1629noisenoise characteristicsiris valvenozzle valvevortex zone |
| spellingShingle | D. V. Abramkina A. O. Ivanova D. F. Karpov Kh. M. Vafaeva A. S. Voronov Analysis of air flow formation in a nozzle valve Вестник Дагестанского государственного технического университета: Технические науки noise noise characteristics iris valve nozzle valve vortex zone |
| title | Analysis of air flow formation in a nozzle valve |
| title_full | Analysis of air flow formation in a nozzle valve |
| title_fullStr | Analysis of air flow formation in a nozzle valve |
| title_full_unstemmed | Analysis of air flow formation in a nozzle valve |
| title_short | Analysis of air flow formation in a nozzle valve |
| title_sort | analysis of air flow formation in a nozzle valve |
| topic | noise noise characteristics iris valve nozzle valve vortex zone |
| url | https://vestnik.dgtu.ru/jour/article/view/1629 |
| work_keys_str_mv | AT dvabramkina analysisofairflowformationinanozzlevalve AT aoivanova analysisofairflowformationinanozzlevalve AT dfkarpov analysisofairflowformationinanozzlevalve AT khmvafaeva analysisofairflowformationinanozzlevalve AT asvoronov analysisofairflowformationinanozzlevalve |