{"title":"平面通道壁面上不同形状圆柱空腔的亚声速分离流结构","authors":"M. A. Zubin, A. F. Zubkov, A. Yu. Chulyunin","doi":"10.1134/S0015462824605370","DOIUrl":null,"url":null,"abstract":"<p>The results of experimental and numerical studies of subsonic turbulent flow past cylindrical cavities of various shapes in plan on the plate or on the wall of a plane–parallel channel are present. The proposed shapes of cavities are modifications of a finite-span cylindrical trench with rounded spherical end faces, known in the literature as an oval-trench dimple (OTD). The pressure coefficient distributions are obtained and the patterns of surface streamlines are visualized for modified cylindrical cavities of <i>V</i>- and drop-shaped configurations of various relative depths. A comparative estimate of the intensity of reverse separation flow in oval-trench dimples of conventional and modified shapes is given. Such a flow affects the thermal-hydraulic characteristics of the surfaces with artificial relief. A comparison of the experimental results and the calculation carried out within the RANS technology showed that the proposed approach can be used in search for the optimum shape of the elements of artificial reliefs of heat exchange surfaces.</p>","PeriodicalId":560,"journal":{"name":"Fluid Dynamics","volume":"60 2","pages":""},"PeriodicalIF":0.6000,"publicationDate":"2025-04-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Structure of Subsonic Separation Flow past Cylindrical Cavities of Various Shapes in Plan on the Wall of a Plane Channel\",\"authors\":\"M. A. Zubin, A. F. Zubkov, A. Yu. Chulyunin\",\"doi\":\"10.1134/S0015462824605370\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p>The results of experimental and numerical studies of subsonic turbulent flow past cylindrical cavities of various shapes in plan on the plate or on the wall of a plane–parallel channel are present. The proposed shapes of cavities are modifications of a finite-span cylindrical trench with rounded spherical end faces, known in the literature as an oval-trench dimple (OTD). The pressure coefficient distributions are obtained and the patterns of surface streamlines are visualized for modified cylindrical cavities of <i>V</i>- and drop-shaped configurations of various relative depths. A comparative estimate of the intensity of reverse separation flow in oval-trench dimples of conventional and modified shapes is given. Such a flow affects the thermal-hydraulic characteristics of the surfaces with artificial relief. A comparison of the experimental results and the calculation carried out within the RANS technology showed that the proposed approach can be used in search for the optimum shape of the elements of artificial reliefs of heat exchange surfaces.</p>\",\"PeriodicalId\":560,\"journal\":{\"name\":\"Fluid Dynamics\",\"volume\":\"60 2\",\"pages\":\"\"},\"PeriodicalIF\":0.6000,\"publicationDate\":\"2025-04-28\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Fluid Dynamics\",\"FirstCategoryId\":\"5\",\"ListUrlMain\":\"https://link.springer.com/article/10.1134/S0015462824605370\",\"RegionNum\":4,\"RegionCategory\":\"工程技术\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q4\",\"JCRName\":\"MECHANICS\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Fluid Dynamics","FirstCategoryId":"5","ListUrlMain":"https://link.springer.com/article/10.1134/S0015462824605370","RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"MECHANICS","Score":null,"Total":0}
Structure of Subsonic Separation Flow past Cylindrical Cavities of Various Shapes in Plan on the Wall of a Plane Channel
The results of experimental and numerical studies of subsonic turbulent flow past cylindrical cavities of various shapes in plan on the plate or on the wall of a plane–parallel channel are present. The proposed shapes of cavities are modifications of a finite-span cylindrical trench with rounded spherical end faces, known in the literature as an oval-trench dimple (OTD). The pressure coefficient distributions are obtained and the patterns of surface streamlines are visualized for modified cylindrical cavities of V- and drop-shaped configurations of various relative depths. A comparative estimate of the intensity of reverse separation flow in oval-trench dimples of conventional and modified shapes is given. Such a flow affects the thermal-hydraulic characteristics of the surfaces with artificial relief. A comparison of the experimental results and the calculation carried out within the RANS technology showed that the proposed approach can be used in search for the optimum shape of the elements of artificial reliefs of heat exchange surfaces.
期刊介绍：
Fluid Dynamics is an international peer reviewed journal that publishes theoretical, computational, and experimental research on aeromechanics, hydrodynamics, plasma dynamics, underground hydrodynamics, and biomechanics of continuous media. Special attention is given to new trends developing at the leading edge of science, such as theory and application of multi-phase flows, chemically reactive flows, liquid and gas flows in electromagnetic fields, new hydrodynamical methods of increasing oil output, new approaches to the description of turbulent flows, etc.
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