Statistical properties of turbulent free jets issuing from rectangular nozzles with different aspect ratios

Ma Ziran; Xu Minyi; Luan Jian; Liu Xiaopeng; Zhao Feifei

doi:10.11729/syltlx20160116

Volume 31 Issue 1

Turn off MathJax

Article Contents

Abstract

References

Journal of Experiments in Fluid Mechanics > 2017 > 31(1): 54-61. > DOI: 10.11729/syltlx20160116

Ma Ziran, Xu Minyi, Luan Jian, Liu Xiaopeng, Zhao Feifei. Statistical properties of turbulent free jets issuing from rectangular nozzles with different aspect ratios[J]. Journal of Experiments in Fluid Mechanics, 2017, 31(1): 54-61. DOI: 10.11729/syltlx20160116

Citation:

PDF (11170 KB)

Statistical properties of turbulent free jets issuing from rectangular nozzles with different aspect ratios

Marine Engineering College, Dalian Martime University, Dalian Liaoning 116026, China

More Information

Received Date: July 23, 2016
Revised Date: September 04, 2016

Graphical Abstract

Abstract

Abstract

This paper reports the experimental investigation of the turbulence characteristics of the free air jets issuing from rectangular orifices with different aspect ratios (AR=1~15). The velocity was measured by a hot-wire anemometer with the exiting Reynolds number (Re) being 15,000 for all jets, based on the equivalent diameter of the rectangular orifices. This paper mainly analyzes the evolution of centerline average velocity, frequency spectrum, turbulence scale along the centerline of rectangular jets. The results show that the centerline mean velocity decays faster and the turbulence intensity grows higher as AR increases. With jet flows developing downstream (x/D_e>30), the turbulence energy spectrum, probability density function and turbulence length scales of rectangular jets approach to those of circular jets. The principle for this phenomenon is that the momentum from the jet always spreads into still surroundings in more efficient way.
- rectangular jet,
- turbulence,
- spectrum,
- turbulence scales

FullText(HTML)

References (33)

References

[1]	Gutmark E, Grinstein F. Flow control with noncircular jets[J]. Annual Review of Fluid Mechanics, 2003, 31 (1): 239-272. https://www.researchgate.net/profile/Fernando_Grinstein/publication/228474534_FLOW_CONTROL_WITH_NONCIRCULAR_JETS_1/links/0046351e8000e3041f000000.pdf?inViewer=true&pdfJsDownload=true&disableCoverPage=true&origin=publication_detail
[2]	Mi J, Nathan G J. Statistical properties of turbulent free jets issuing from nine differently-shaped nozzles[J]. Flow, Turbulence and Combustion, 2010, 84 (4): 583-606. DOI: 10.1007/s10494-009-9240-0
[3]	Grinstein F. Self-induced vortex ring dynamics in subsonic rectangular jets[J]. Physics of Fluids, 1995, 7 (10): 2519-2521. DOI: 10.1063/1.868699
[4]	Grinstein F, Gutmark E, Parr T. Near field dynamics of subsonic free square jets: a computational and experimental study[J]. Physics of Fluids, 1995, 7 (6): 1483-1497. DOI: 10.1063/1.868534
[5]	Gutmark E, Schadow K C, Parr T, et al. Noncircular jets in combustion systems[J]. Experiments in Fluids, 1989, 7 (4): 248-258. https://www.researchgate.net/publication/226810595_Noncircular_jets_in_combustion_systems
[6]	Mi J, Nathan G J, Luxton R E. Centreline mixing characteristics of jets from nine differently shaped nozzles[J]. Experiments in Fluids, 2000, 28 (1): 93-94. DOI: 10.1007/s003480050012
[7]	Miller R C, Madnia, Givi P. Numerical simulation of non-circular jets[J]. Computers&Fluids, 1995, 24 (1): 1-25. https://www.researchgate.net/publication/222453953_Numerical_simulation_of_non-circular_jets
[8]	Quinn W R. Development of a large-aspect-ratio rectangular turbulent free jet[J]. AIAA Journal, 1994, 32 (3): 547-554. DOI: 10.2514/3.12020
[9]	Yu H, Girimaji S S. Near-field turbulent simulations of rectangular jets using lattice Boltzmann method[J]. Physics of Fluids, 2005, 17: 125106. DOI: 10.1063/1.2140021
[10]	Mi J, Nathan G. Statistical properties of turbulent free jets issuing from nine differently-shaped nozzles[J]. Flow, Turbulence and Combustion, 2010, 84 (4): 583-606. DOI: 10.1007/s10494-009-9240-0
[11]	Quinn W. Streamwise evolution of a square jet cross section[J]. AIAA Journal, 1992, 30 (12): 2852-2857. DOI: 10.2514/3.48973
[12]	Krothapalli A, Baganoff D, Karamcheti K. On the mixing of a rectangular jet[J]. Journal of Fluid Mechanics, 1981, 107 (1): 201-220. https://www.researchgate.net/publication/23619832_On_The_Mixing_of_a_Rectangular_Jet
[13]	Quinn W, Militzer J. Experimental and numerical study of a turbulent free square jet[J]. Physics of Fluids, 1988, 31: 1017. DOI: 10.1063/1.867007
[14]	Sfeir A. Investigation of three-dimensional turbulent rectangular jets[J]. AIAA Journal, 1979, 17: 1055-1060. DOI: 10.2514/3.61277
[15]	Tsuchiya Y, Horikoshi C. On the spread of rectangular jets[J]. Experiments in Fluids, 1986, 4 (4): 197-204. DOI: 10.1007/BF00717815
[16]	Tam C K W, Thies A T. Instability of rectangular jets[J]. Journal of Fluid Mechanics, 1993, 248: 425-448. DOI: 10.1017/S0022112093000837
[17]	Deo R C, Nathan G J, Mi J C. Comparison of turbulent jets issuing from rectangular nozzles with and without sidewalls[J]. Expe-rimental Thermal and Fluid Science, 2007, 32 (2): 596-606. DOI: 10.1016/j.expthermflusci.2007.06.009
[18]	Husain H S, Hussain F. Elliptic jets Ⅱ-dynamics of coherent structures: pairing[J]. Journal of Fluid Mechanics, 1991, 233: 439-482. DOI: 10.1017/S0022112091000551
[19]	Deo R C, Mi J, Nathan G J. The influence of nozzle-exit geometric profile on statistical properties of a turbulent plane jet[J]. Experimental Thermal and Fluid Science, 2007, 32 (2): 545-559. DOI: 10.1016/j.expthermflusci.2007.06.004
[20]	Mi J, Nobes D S, Nathan G J. Influence of jet exit conditions on the passive scaler field of an axisymmetric free jet[J]. Journal of Fluid Mechanics, 2001, 432: 91-125. https://www.researchgate.net/publication/231979781_Influence_of_jet_exit_conditions_on_the_passive_scalar_field_of_an_axisymmetric_free_jet
[21]	Mi J, Nathan G J, Nobes D S. Mixing characteristics of axisymmetric free jets from a contoured nozzle, an orifice plate and a pipe[J]. Journal of Fluids Engineering-Transactions of the Asme, 2001, 123 (4): 878-883. DOI: 10.1115/1.1412460
[22]	Xu G, Antonia R A. Effect of different initial conditions on a turbulent round free jet[J]. Experiments in Fluids, 2002, 33 (5): 677-683. DOI: 10.1007/s00348-002-0523-7
[23]	Deo R C, Mi J, Nathan G J. The influence of Reynolds number on a plane jet[J]. Physics of Fluids, 2008, 20 (7): 075108. DOI: 10.1063/1.2959171
[24]	杜诚, 徐敏义, 米建春. 雷诺数对圆形渐缩喷嘴湍流射流的影响[J]. 物理学报, 2010, 59 (9): 6331-6338. http://www.cnki.com.cn/Article/CJFDTOTAL-WLXB201009065.htm Du C, Xu M Y, Mi J C. Effect of exit Reynolds number on a turbulent round jet[J]. Acta Physica Sinica, 2010, 59 (9): 6331-6338. http://www.cnki.com.cn/Article/CJFDTOTAL-WLXB201009065.htm
[25]	Dowling D R, Dimotakis P E. Similarity of the concentration field of gas-phase turbulent jets[J]. Journal of Fluid Mecha-nics, 1990, 218 (1): 109-141. https://www.researchgate.net/publication/232029248_Similarity_of_the_concentration_field_of_gas-phase_turbulent_jets
[26]	Quinn J. Effects of nonparallel exit flow on round turbulent free jets[J]. International Journal of Heat and Fluid Flow, 1989, 10 (2): 139-145. DOI: 10.1016/0142-727X(89)90008-8
[27]	Quinn W R. Upstream nozzle shaping effects on near field flow in round turbulent free jets[J]. European Journal of Mechanics-B/Fluids, 2005, 25 (3): 279-301.
[28]	Nathan G J, Mi J, Alwahabi Z T, et al. Impacts of a jet's exit flow pattern on mixing and combustion performance[J]. Progress in Energy and Combustion Science, 2006, 32 (5-6): 496-538. DOI: 10.1016/j.pecs.2006.07.002
[29]	Mi J, Xu M, Du C. Digital filter for hot-wire measurements of small-scale turbulence properties[J]. Measurement Science and Technology, 2011, 22: 125401. DOI: 10.1088/0957-0233/22/12/125401
[30]	Mi J, Deo R C, Nathan G J. Fast-convergent iterative scheme for filtering velocity signals and finding Kolmogorov scales[J]. Physical Review E, 2005, 71 (6): 066304. DOI: 10.1103/PhysRevE.71.066304
[31]	冯云松, 金伟, 黄超超, 等. 宽高比对矩形尾喷管羽流温度场的影响研究[J]. 机械设计与制造, 2012, 12: 224-226. http://www.cnki.com.cn/Article/CJFDTOTAL-JSYZ201212081.htm Feng Y S, Jin W, Huang C C, et al. Research on the influence of aspect ratio on plume temperature field of a rectangular nozzle[J]. Machinery Design&Manufacture, 2012, 12: 224-226. http://www.cnki.com.cn/Article/CJFDTOTAL-JSYZ201212081.htm
[32]	张勃, 吉洪湖, 曹广州, 等. 宽高比对矩形喷管射流湍流强度影响试验[J]. 航空动力学报, 2010, 25 (10): 2244-2248. http://www.cnki.com.cn/Article/CJFDTOTAL-HKDI201010015.htm Zhang B, Ji H H, Cao G Z, et al. Experimental investigation of jets turbulence intersity charateristics from rectangular nozzles with different aspect ratios[J]. Journal of Aerospace Power, 2010, 25 (10): 2244-2248. http://www.cnki.com.cn/Article/CJFDTOTAL-HKDI201010015.htm
[33]	Bejan A, Ziaei S, Lorente S. Evolution: Why all plumes and jets evolve to round cross sections[J]. Scientific Reports, 2014, 4. http://www.academia.edu/15487898/Evolution_Why_all_plumes_and_jets_evolve_to_round_cross_sections

Cited By

Cited by

Periodical cited type(6)

1.	王海涛，冯和英，赵鲲，覃晨，各国基，郭鹏. 低亚声速大宽高比矩形射流远场噪声特性研究. 装备环境工程. 2023(06): 10-17 .
2.	张建伟，刘广奇，冯颖，董鑫. 异形喷嘴撞击流混合器涡特性及混合性能数值模拟. 高校化学工程学报. 2023(05): 729-739 .
3.	贺彩彩，董振，魏斌，陈振亚. BTA深孔钻射流孔参数的优化与仿真. 工具技术. 2020(01): 63-66 .
4.	刘兴铎，白兰昌，严金林，万春燕，李友兴，杨超. 水下采油树输油管道几何参数敏感性分析. 机械工程师. 2020(04): 124-125+128 .
5.	权辉，谢建，李良，张力. 火箭发射场坪排焰道口射流研究. 兵工学报. 2020(06): 1111-1122 .
6.	陈军，王颖，孙佳乐. 横流环境中两孔热水浮射流数值模拟研究. 水资源与水工程学报. 2017(05): 168-173 .

Other cited types(9)

Get Citation

PDF

XML

Article Metrics

Article views (202) PDF downloads (15) Cited by(15)

Statistical properties of turbulent free jets issuing from rectangular nozzles with different aspect ratios

Abstract

References

Cited by

Periodical cited type(6)

Other cited types(9)

Catalog

Article Metrics

Related

Statistical properties of turbulent free jets issuing from rectangular nozzles with different aspect ratios

Abstract

References

Cited by

Periodical cited type(6)

Other cited types(9)

Catalog

Article Metrics

Related

Export File

Citation

Format

Content