Large eddy simulations of a circular orifice jet with and without a cross-sectional exit plate

doi:10.1088/1674-1056/23/4/044704

中国物理B ›› 2014, Vol. 23 ›› Issue (4): 44704-044704.doi: 10.1088/1674-1056/23/4/044704

• ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS • 上一篇下一篇

Large eddy simulations of a circular orifice jet with and without a cross-sectional exit plate

张健鹏^a, 徐敏义^b, 米建春^{a c}

a State Key Laboratory of Turbulence & Complex Systems, College of Engineering, Peking University, Beijing 100871, China;
b Marine Engineering College, Dalian Maritime University, Dalian 116026, China;
c College of Energy & Power Engineering, Changsha University of Science and Technology, Changsha 410004, China

收稿日期:2013-06-07 修回日期:2013-09-27 出版日期:2014-04-15 发布日期:2014-04-15
基金资助:
Project supported by the National Natural Science Foundation of China (Grant Nos. 11072005 and 10921202) and the Fundamental Research Funds for the Central Universities, China (Grant No. 3132013029).

Large eddy simulations of a circular orifice jet with and without a cross-sectional exit plate

Zhang Jian-Peng (张健鹏)^a, Xu Min-Yi (徐敏义)^b, Mi Jian-Chun (米建春)^{a c}

a State Key Laboratory of Turbulence & Complex Systems, College of Engineering, Peking University, Beijing 100871, China;
b Marine Engineering College, Dalian Maritime University, Dalian 116026, China;
c College of Energy & Power Engineering, Changsha University of Science and Technology, Changsha 410004, China

Received:2013-06-07 Revised:2013-09-27 Online:2014-04-15 Published:2014-04-15
Contact: Mi Jian-Chun E-mail:jcmi@coe.pku.edu.cn
About author:47.27.ep; 47.27.wg; 47.85.lk
Supported by:
Project supported by the National Natural Science Foundation of China (Grant Nos. 11072005 and 10921202) and the Fundamental Research Funds for the Central Universities, China (Grant No. 3132013029).

摘要/Abstract

摘要： The effect of a cross-sectional exit plane on the downstream mixing characteristics of a circular turbulent jet is investigated using large eddy simulation (LES). The turbulent jet is issued from an orifice-type nozzle at an exit Reynolds number of 5× 10⁴. Both instantaneous and statistical velocity fields of the jet are provided. Results show that the rates of the mean velocity decay and jet spread are both higher in the case with the exit plate than without it. The existence of the plate is found to increase the downstream entrainment rate by about 10% on average over the axial range of 8-30d_e (exit diameter). Also, the presence of the plate enables the formation of vortex rings to occur further downstream by 0.5-1.0d_e. A physical insight into the near-field jet is provided to explain the importance of the boundary conditions in the evolution of a turbulent jet. In addition, a method of using the decay of the centreline velocity and the half-width of the jet to calculate the entrainment rate is proposed.

关键词: circular orifice jet, large eddy simulation (LES), exit plate, entrainment

Abstract: The effect of a cross-sectional exit plane on the downstream mixing characteristics of a circular turbulent jet is investigated using large eddy simulation (LES). The turbulent jet is issued from an orifice-type nozzle at an exit Reynolds number of 5× 10⁴. Both instantaneous and statistical velocity fields of the jet are provided. Results show that the rates of the mean velocity decay and jet spread are both higher in the case with the exit plate than without it. The existence of the plate is found to increase the downstream entrainment rate by about 10% on average over the axial range of 8-30d_e (exit diameter). Also, the presence of the plate enables the formation of vortex rings to occur further downstream by 0.5-1.0d_e. A physical insight into the near-field jet is provided to explain the importance of the boundary conditions in the evolution of a turbulent jet. In addition, a method of using the decay of the centreline velocity and the half-width of the jet to calculate the entrainment rate is proposed.

Key words: circular orifice jet, large eddy simulation (LES), exit plate, entrainment

中图分类号: (Large-eddy simulations)

47.27.ep

47.27.wg (Turbulent jets) 47.85.lk (Mixing enhancement)

张健鹏, 徐敏义, 米建春. Large eddy simulations of a circular orifice jet with and without a cross-sectional exit plate[J]. 中国物理B, 2014, 23(4): 44704-044704.

Zhang Jian-Peng (张健鹏), Xu Min-Yi (徐敏义), Mi Jian-Chun (米建春). Large eddy simulations of a circular orifice jet with and without a cross-sectional exit plate[J]. Chin. Phys. B, 2014, 23(4): 44704-044704.

参考文献 33

[1]	Wygnanski I and Fiedler H 1969 J. Fluid Mech. 38 577
[2]	Hussein H J, Capp S P and George W K 1994 J. Fluid Mech. 258 31
[3]	Hussain A K M F and Zaman K B M Q 1981 J. Fluid Mech. 110 39
[4]	George W K 1989 Advances in Turbulence (New York: Springer-Verlag) p. 39
[5]	Becker H A and Massaro T A 1968 J. Fluid Mech. 31 435
[6]	Dimotakis P E, Miake-Lye R C and Papantoniou D A 1983 Phys. Fluids 26 3185
[7]	Mi J, Nobes D S and Nathan G J 2001 J. Fluid Mech. 432 91
[8]	Malmström T G, Kirkpatrick A T, Christensen B and Knappmiller K D 1997 J. Fluid Mech. 346 363
[9]	Brancher P, Chomaz J M and Huerre P 1994 Phys. Fluids 6 1768
[10]	Boersma B, Brethouwer G and Nieuwstadt F 1998 Phys. Fluids 10 889
[11]	Bogey C and Bailly C 2006 Phys. Fluids 18 065101
[12]	KimJ and Choi H 2009 J. Fluid Mech. 620 383
[13]	Mi J, Nobes D S and Nathan G J 2000 Expt. Fluids 28 93
[14]	Mi J, Nathan G J and Nobes D S 2001 J. Fluids Eng. 123 878
[15]	Quinn W 2006 Eur. J. Mech. B: Fluid 5 279
[16]	Mi J, Kalt P, Nathan G J and Wong C Y 2007 Expt. Fluids 42 625
[17]	Zaman K B M Q 1996 J. Fluid Mech. 36 1
[18]	Hussain A K M F 1986 J. Fluid Mech. 173 303
[19]	Grinstein F F and DeVore C R 1996 Phys. Fluids 8 1237
[20]	Stanley S A, Sarkar S and Mellado J P 2002 J. Fluid Mech. 450 377
[21]	Zaman K B M Q 1999 J. Fluid Mech. 383 197
[22]	Antonia R A and Zhao Q 2001 Expt. Fluids 31 319
[23]	Burattini P, Antonia R A, Rajagopalan S and Stephens M 2004 Expt. Fluids 37 56
[24]	Babu P C and Mahesh K 2004 Phys. Fluids 16 3699
[25]	Romano G P 2002 Expt. Fluids 33 323
[26]	Germano M, Piomelli U, Moin P and Cabot W H 1991 Phys. Fluids A: Fluid Dyn. 3 1760
[27]	Lilly D K 1992 Phys. Fluids A: Fluid Dyn. 4 633
[28]	Gutmark E and Ho C M 1983 Phys. Fluids 26 2932
[29]	Dimotakis P E 2000 J. Fluid Mech. 409 69
[30]	Mi J, Xu M and Zhou T 2013 Phys. Fluids 25 075101
[31]	Xu M Y, Zhang J P, Mi J C, Nathan G J and Kalt P A M 2013 Sci. China: Phys. Mech. Astron. 56 1176
[32]	Xu M Y, Zhang J P, Mi J C, Nathan G J and Kalt P A M 2013 Chin. Phys. B 22 034701
[33]	Hussain A K M F and Zedan M F 1978 Phys. Fluids 21 1100

Large eddy simulations of a circular orifice jet with and without a cross-sectional exit plate

Large eddy simulations of a circular orifice jet with and without a cross-sectional exit plate

PDF (PC)

赞

可视化

摘要/Abstract

引用本文

使用本文

参考文献 33

相关文章 7

Metrics

本文评价

推荐阅读 0

[1]	李莹, 张广鹍, 宋自根. Entrainment mechanism of the cyanobacterial circadian clock induced by oxidized quinone[J]. 中国物理B, 2020, 29(9): 98703-098703.
[2]	朱宝, 周建, 贾梦婷, 杨会杰, 顾长贵. Entrainment range affected by the difference in sensitivity to light-information between two groups of SCN neurons[J]. 中国物理B, 2020, 29(6): 68702-068702.
[3]	顾长贵, 王萍, 杨会杰. Entrainment range affected by the heterogeneity in the amplitude relaxation rate of suprachiasmatic nucleus neurons[J]. 中国物理B, 2019, 28(1): 18701-018701.
[4]	李一明, 李宝宽, 齐凤升, 王喜春. Numerical investigation of the interaction of the turbulent dual-jet and acoustic propagation[J]. 中国物理B, 2017, 26(2): 24701-024701.
[5]	顾长贵, 张新华, 刘宗华. Collective behaviors of suprachiasm nucleus neurons under different light-dark cycles[J]. 中国物理B, 2014, 23(7): 78702-078702.
[6]	徐敏义, 张健鹏, 米建春, Nathan G. J., Kalt P. A. M.. Mean and fluctuating velocity fields of a diamond turbulent jet[J]. 中国物理B, 2013, 22(3): 34701-034701.
[7]	陈立群. An open plus nonlinear closed loop control of chaotic oscillators[J]. 中国物理B, 2002, 11(9): 900-904.