Mean and fluctuating velocity fields of a diamond turbulent jet
The present paper reports the first investigation on a turbulent jet issuing from a diamond orifice（hereafter termed a ＂diamond jet＂） with an aspect ratio of 1.7.Velocity measurements were conducted in the transitional region,and the exit Reynolds number of the jet was 50000.For comparison,a round j...
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| Published in | Chinese physics B Vol. 22; no. 3; pp. 344 - 351 |
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| Main Author | |
| Format | Journal Article |
| Language | English |
| Published |
01.03.2013
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| Subjects | |
| Online Access | Get full text |
| ISSN | 1674-1056 2058-3834 1741-4199 |
| DOI | 10.1088/1674-1056/22/3/034701 |
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| Abstract | The present paper reports the first investigation on a turbulent jet issuing from a diamond orifice（hereafter termed a ＂diamond jet＂） with an aspect ratio of 1.7.Velocity measurements were conducted in the transitional region,and the exit Reynolds number of the jet was 50000.For comparison,a round jet with identical normalized boundary conditions was also measured.It is shown that the diamond jet decays and spreads faster than the round jet does over the measured flow region.The axis-switching phenomenon is observed in the diamond jet.Although both jets display primary coherent structures in the near field,these structures are found to break down more rapidly in the diamond jet,due to the higher three-dimensionality of the flow.Moreover,the streamwise components of the Reynolds normal stress and all the shear stresses reach their maxima around the location of the maximal mean shear while the maxima of the lateral components of the Reynolds normal stresses occur around the centreline of the jet. |
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| AbstractList | The present paper reports the first investigation on a turbulent jet issuing from a diamond orifice (hereafter termed a "diamond jet") with an aspect ratio of 1.7. Velocity measurements were conducted in the transitional region, and the exit Reynolds number of the jet was 50000. For comparison, a round jet with identical normalized boundary conditions was also measured. It is shown that the diamond jet decays and spreads faster than the round jet does over the measured flow region. The axis-switching phenomenon is observed in the diamond jet. Although both jets display primary coherent structures in the near field, these structures are found to break down more rapidly in the diamond jet, due to the higher three-dimensionality of the flow. Moreover, the streamwise components of the Reynolds normal stress and all the shear stresses reach their maxima around the location of the maximal mean shear while the maxima of the lateral components of the Reynolds normal stresses occur around the centreline of the jet. The present paper reports the first investigation on a turbulent jet issuing from a diamond orifice（hereafter termed a ＂diamond jet＂） with an aspect ratio of 1.7.Velocity measurements were conducted in the transitional region,and the exit Reynolds number of the jet was 50000.For comparison,a round jet with identical normalized boundary conditions was also measured.It is shown that the diamond jet decays and spreads faster than the round jet does over the measured flow region.The axis-switching phenomenon is observed in the diamond jet.Although both jets display primary coherent structures in the near field,these structures are found to break down more rapidly in the diamond jet,due to the higher three-dimensionality of the flow.Moreover,the streamwise components of the Reynolds normal stress and all the shear stresses reach their maxima around the location of the maximal mean shear while the maxima of the lateral components of the Reynolds normal stresses occur around the centreline of the jet. |
| Author | 徐敏义 张健鹏 米建春 Nathan G.J. Kalt P.A.M |
| AuthorAffiliation | State Key Laboratory of Turbulence ＆ Complex Systems, College of Engineering, Peking University, Beijing 100871, China Marine Engineenng College, Dalian Maritime University, Dalian 116026, China Centre for Energy Technology and School of Mechanical Engineenng, University of Adelaide, SA 5005, Australia |
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| CitedBy_id | crossref_primary_10_1088_1674_1056_23_12_124703 crossref_primary_10_1007_s00348_020_2930_z crossref_primary_10_1177_09544062211014905 crossref_primary_10_1016_j_taml_2015_04_001 crossref_primary_10_1007_s11433_013_5099_0 crossref_primary_10_1016_j_ijthermalsci_2014_10_006 crossref_primary_10_1088_1674_1056_ab8623 crossref_primary_10_7498_aps_62_225201 crossref_primary_10_1088_1674_1056_23_4_044704 crossref_primary_10_1016_j_expthermflusci_2020_110293 |
| Cites_doi | 10.1007/BF00196464 10.2514/3.10128 10.1007/s003480050012 10.7498/aps.60.034701 10.1063/1.868534 10.1063/1.1928667 10.1007/s10494-009-9239-6 10.1088/1674-1056/20/7/074701 10.1007/s10494-009-9240-0 10.1017/S0022112099003833 10.1017/S0022112089002843 10.1017/S0022112096000420 10.1080/00102209208947199 10.1016/0045-7930(94)00019-U 10.1016/S0017-9310(99)00087-3 10.1063/1.864062 10.1016/j.euromechflu.2006.10.005 10.1016/j.euromechflu.2005.10.002 10.1146/annurev.fluid.31.1.239 10.2514/3.12020 10.1016/j.expthermflusci.2007.06.004 10.1017/S002211209400323X 10.1017/S0022112093000837 10.1017/S0022112081002917 10.1017/S0022112087001587 10.1016/j.expthermflusci.2006.08.009 10.1007/s00348-007-0271-9 10.1007/BF00198004 10.1088/1674-1056/20/12/124701 10.1016/0142-727X(89)90008-8 |
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| DocumentTitleAlternate | Mean and fluctuating velocity fields of a diamond turbulent jet |
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| Notes | Xu Min-Yi , Zhang Jian-Peng , Mi Jian-Chun , Nathan G. J., Kalt E A. M.（1） State Key Laboratory of Turbulence ＆ Complex Systems, College of Engineering, Peking University, Beijing 100871, China ;2） Marine Engineenng College, Dalian Maritime University, Dalian 116026, China ;3） Centre for Energy Technology and School of Mechanical Engineering, University of Adelaide, SA 5005, Australia The present paper reports the first investigation on a turbulent jet issuing from a diamond orifice（hereafter termed a ＂diamond jet＂） with an aspect ratio of 1.7.Velocity measurements were conducted in the transitional region,and the exit Reynolds number of the jet was 50000.For comparison,a round jet with identical normalized boundary conditions was also measured.It is shown that the diamond jet decays and spreads faster than the round jet does over the measured flow region.The axis-switching phenomenon is observed in the diamond jet.Although both jets display primary coherent structures in the near field,these structures are found to break down more rapidly in the diamond jet,due to the higher three-dimensionality of the flow.Moreover,the streamwise components of the Reynolds normal stress and all the shear stresses reach their maxima around the location of the maximal mean shear while the maxima of the lateral components of the Reynolds normal stresses occur around the centreline of the jet. turbulent jet,non-circular jet,PIV measurement,jet entrainment 11-5639/O4 ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23 |
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| References | 22 23 24 29 Mi J (26) 2011; 20 Mi J C (28) 2011; 20 30 31 10 11 Du C (25) 2010; 59 Xu M (27) 2011; 60 12 13 14 15 16 17 18 19 1 2 3 4 5 6 7 8 9 20 21 |
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| Snippet | The present paper reports the first investigation on a turbulent jet issuing from a diamond orifice（hereafter termed a ＂diamond jet＂） with an aspect ratio... The present paper reports the first investigation on a turbulent jet issuing from a diamond orifice (hereafter termed a "diamond jet") with an aspect ratio of... |
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| StartPage | 344 |
| SubjectTerms | Diamonds Fluid dynamics Maxima Reynolds number Shear Spreads Stresses Turbulence Turbulent flow 剪切应力 均值 波动 测量流量 湍流射流 相干结构 速度场 钻石 |
| Title | Mean and fluctuating velocity fields of a diamond turbulent jet |
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