{"title":"存在自由流湍流时圆柱上边界层的结构","authors":"L.R. Hanarp, B.Å. Sundén","doi":"10.1016/0094-4548(82)90055-8","DOIUrl":null,"url":null,"abstract":"<div><p>An investigation of the influence of freestream turbulence on the temperature and velocity boundary layers on a circular cylinder in cross flow is presented. The investigation has been carried out for the two Reynolds numbers 5·10<sup>4</sup> and 1·10<sup>5</sup> with freestream turbulence intensities ranging from 2.5 – 11.5 % and integral scales <em>Λ</em><sub>f∞</sub>/D ≲ 0.14. Both experiments and numerical calculations show that for the flow ranges considered, the mean velocity field is rather unaffected by the freestream turbulence while the mean temperature field is influenced in such a way that increases in heat transfer of order 8 – 1 10 % occur.</p></div>","PeriodicalId":100875,"journal":{"name":"Letters in Heat and Mass Transfer","volume":"9 3","pages":"Pages 169-177"},"PeriodicalIF":0.0000,"publicationDate":"1982-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0094-4548(82)90055-8","citationCount":"6","resultStr":"{\"title\":\"Structure of the boundary layers on a circular cylinder in the presence of freestream turbulence\",\"authors\":\"L.R. Hanarp, B.Å. Sundén\",\"doi\":\"10.1016/0094-4548(82)90055-8\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>An investigation of the influence of freestream turbulence on the temperature and velocity boundary layers on a circular cylinder in cross flow is presented. The investigation has been carried out for the two Reynolds numbers 5·10<sup>4</sup> and 1·10<sup>5</sup> with freestream turbulence intensities ranging from 2.5 – 11.5 % and integral scales <em>Λ</em><sub>f∞</sub>/D ≲ 0.14. Both experiments and numerical calculations show that for the flow ranges considered, the mean velocity field is rather unaffected by the freestream turbulence while the mean temperature field is influenced in such a way that increases in heat transfer of order 8 – 1 10 % occur.</p></div>\",\"PeriodicalId\":100875,\"journal\":{\"name\":\"Letters in Heat and Mass Transfer\",\"volume\":\"9 3\",\"pages\":\"Pages 169-177\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"1982-05-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"https://sci-hub-pdf.com/10.1016/0094-4548(82)90055-8\",\"citationCount\":\"6\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Letters in Heat and Mass Transfer\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/0094454882900558\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Letters in Heat and Mass Transfer","FirstCategoryId":"1085","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/0094454882900558","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
Structure of the boundary layers on a circular cylinder in the presence of freestream turbulence
An investigation of the influence of freestream turbulence on the temperature and velocity boundary layers on a circular cylinder in cross flow is presented. The investigation has been carried out for the two Reynolds numbers 5·104 and 1·105 with freestream turbulence intensities ranging from 2.5 – 11.5 % and integral scales Λf∞/D ≲ 0.14. Both experiments and numerical calculations show that for the flow ranges considered, the mean velocity field is rather unaffected by the freestream turbulence while the mean temperature field is influenced in such a way that increases in heat transfer of order 8 – 1 10 % occur.
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