{"title":"高雷诺数下环绕圆形圆柱体的跨音速非理想气体流的数值研究","authors":"Camille Matar, Xavier Gloerfelt, Paola Cinnella","doi":"10.1007/s10494-023-00496-1","DOIUrl":null,"url":null,"abstract":"<div><p>High Reynolds transonic ideal and non-ideal gas flows around a smooth circular cylinder are investigated by means of Large Eddy Simulations over a range of Mach numbers encompassing the drag divergence. The global aerodynamic performance of the cylinder in both air and a dense vapor are compared, as well as the influence of the thermodynamic behavior of the working fluid on the wake development. The drag divergence is delayed in the dense vapor flow compared to air, and the overall pressure drag is increased due to the lower back pressure. Loss generation mechanisms are also studied via entropy production in the boundary layer and by means of a loss breakdown analysis commonly used in turbomachinery. The specific entropy production rate is found to be lower in the dense gas flow compared to air. Finally, the momentum loss coefficient is reduced upon suppressing unsteady transonic vortex shedding.</p></div>","PeriodicalId":559,"journal":{"name":"Flow, Turbulence and Combustion","volume":"112 1","pages":"375 - 395"},"PeriodicalIF":2.0000,"publicationDate":"2023-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Numerical Investigation of Transonic Non-ideal Gas Flows Around a Circular Cylinder at High Reynolds Number\",\"authors\":\"Camille Matar, Xavier Gloerfelt, Paola Cinnella\",\"doi\":\"10.1007/s10494-023-00496-1\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>High Reynolds transonic ideal and non-ideal gas flows around a smooth circular cylinder are investigated by means of Large Eddy Simulations over a range of Mach numbers encompassing the drag divergence. The global aerodynamic performance of the cylinder in both air and a dense vapor are compared, as well as the influence of the thermodynamic behavior of the working fluid on the wake development. The drag divergence is delayed in the dense vapor flow compared to air, and the overall pressure drag is increased due to the lower back pressure. Loss generation mechanisms are also studied via entropy production in the boundary layer and by means of a loss breakdown analysis commonly used in turbomachinery. The specific entropy production rate is found to be lower in the dense gas flow compared to air. Finally, the momentum loss coefficient is reduced upon suppressing unsteady transonic vortex shedding.</p></div>\",\"PeriodicalId\":559,\"journal\":{\"name\":\"Flow, Turbulence and Combustion\",\"volume\":\"112 1\",\"pages\":\"375 - 395\"},\"PeriodicalIF\":2.0000,\"publicationDate\":\"2023-10-28\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Flow, Turbulence and Combustion\",\"FirstCategoryId\":\"5\",\"ListUrlMain\":\"https://link.springer.com/article/10.1007/s10494-023-00496-1\",\"RegionNum\":3,\"RegionCategory\":\"工程技术\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q3\",\"JCRName\":\"MECHANICS\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Flow, Turbulence and Combustion","FirstCategoryId":"5","ListUrlMain":"https://link.springer.com/article/10.1007/s10494-023-00496-1","RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"MECHANICS","Score":null,"Total":0}
Numerical Investigation of Transonic Non-ideal Gas Flows Around a Circular Cylinder at High Reynolds Number
High Reynolds transonic ideal and non-ideal gas flows around a smooth circular cylinder are investigated by means of Large Eddy Simulations over a range of Mach numbers encompassing the drag divergence. The global aerodynamic performance of the cylinder in both air and a dense vapor are compared, as well as the influence of the thermodynamic behavior of the working fluid on the wake development. The drag divergence is delayed in the dense vapor flow compared to air, and the overall pressure drag is increased due to the lower back pressure. Loss generation mechanisms are also studied via entropy production in the boundary layer and by means of a loss breakdown analysis commonly used in turbomachinery. The specific entropy production rate is found to be lower in the dense gas flow compared to air. Finally, the momentum loss coefficient is reduced upon suppressing unsteady transonic vortex shedding.
期刊介绍：
Flow, Turbulence and Combustion provides a global forum for the publication of original and innovative research results that contribute to the solution of fundamental and applied problems encountered in single-phase, multi-phase and reacting flows, in both idealized and real systems. The scope of coverage encompasses topics in fluid dynamics, scalar transport, multi-physics interactions and flow control. From time to time the journal publishes Special or Theme Issues featuring invited articles.
Contributions may report research that falls within the broad spectrum of analytical, computational and experimental methods. This includes research conducted in academia, industry and a variety of environmental and geophysical sectors. Turbulence, transition and associated phenomena are expected to play a significant role in the majority of studies reported, although non-turbulent flows, typical of those in micro-devices, would be regarded as falling within the scope covered. The emphasis is on originality, timeliness, quality and thematic fit, as exemplified by the title of the journal and the qualifications described above. Relevance to real-world problems and industrial applications are regarded as strengths.
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