ACTA AERONAUTICAET ASTRONAUTICA SINICA >
Experimental investigation on shear vortex of jet in cross-flow at low Reynolds number
Received date: 2016-10-04
Revised date: 2016-10-27
Online published: 2016-12-13
Supported by
National Basic Research Program of China (2013CB035702);National Natural Science Foundation of China (11302165)*Corresponding author.E-mail:wangxian@mail.xjtu.edu.cn
The flow characteristic and vortical structures associated with the jet in cross-flow (JICF) is studied to reveal the mixing mechanism between coolant jet and hot cross-flow in film cooling of turbine blades. Experimental investigations on shear vortex of single-jet in cross-flow are carried out in this paper. The effects of velocity ratio, Reynolds number and inclined angle on the characteristics of shear vortex are studied mainly. Results show that the velocity ratio, Reynolds number and inclined angle have a great influence on the mixing between jet and cross-flow, and therefore affect the jet trajectory and jet penetration into cross-flow which results in various characteristics of shear vortex. We also find that the leading-edge shear vortex and trailing-edge shear vortex are formed by boundary layer vortex of jet flow and cross-flow, respectively. The trailing-edge shear vortex becomes the main flow structure when the cross-flow boundary layer vortex is stronger than jet boundary layer vortex. On the contrary, the leading-edge vortex becomes dominant.
Key words： jet in cross-flow; velocity ratio; Reynolds number; inclined angle; shear vortex
ZHANG Baolei , SHANGGUAN Yanqin , WANG Xian , CHEN Gang , LI Yueming . Experimental investigation on shear vortex of jet in cross-flow at low Reynolds number[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2017 , 38(7) : 120831 -120831 . DOI: 10.7527/S1000-6893.2016.0305
[1] TYAGI M, ACHARYA S. Large eddy simulation of film cooling flow from an inclined cylindrical jet[J]. Journal of Turbomachinery, 2003, 125(4): 734-742.
[2] BOGARD D G, THOLE K A. Gas turbine film cooling[J]. Journal of Propulsion & Power, 2006, 22(2): 249-270.
[3] FRIC T F, ROSHKO A. Vortical structure in the wake of a transverse jet[J]. Journal of Fluid Mechanics, 1994, 279: 1-47.
[4] GUTMARK E J, IBRAHIM I M, MURUGAPPAN S. Dynamics of single and twin circular jets in cross flow[J]. Experiments in Fluids, 2011, 50(3): 653-663.
[5] SALEWSKI M, STANKOVIC D, FUCHS L. Mixing in circular and non-circular jets in crossflow[J]. Flow, Turbulence and Combustion, 2008, 80(2): 255-283.
[6] KELSO R M, LIM T T, PERRY A E. An experimental study of round jets in cross-flow[J]. Journal of Fluid Mechanics, 1996, 306: 111-144.
[7] LIM T T, NEW T H, LUO S C. On the development of large-scale structures of a jet normal to a cross flow[J]. Physics of Fluids, 2001, 13(3): 770-775.
[8] MAHESH K. The interaction of jets with crossflow[J]. Annual Review of Fluid Mechanics, 2013, 45: 379-407.
[9] SAU R, MAHESH K. Dynamics and mixing of vortex rings in crossflow[J]. Journal of Fluid Mechanics, 2008, 604: 389-409.
[10] 关晖, 吴锤结. 湍流横向射流的大涡模拟及其涡结构特性[J]. 中国科学, 2006, 36(6): 662-677. GUAN H, WU C J. Large eddy simulation of turbulent transverse jet and its vortex structure[J]. Science in China, 2006, 36(6): 662-677 (in Chinese).
[11] 郭婷婷, 徐忠, 李少华. 2种角度横向紊动射流的实验分析[J]. 西安交通大学学报, 2003, 37(11): 1207-1210. GUO T T, XU Z, LI S H. Experimental study on turbulent jets injected obliquely into a crossflow[J]. Journal of Xi’an Jiaotong University, 2003, 37(11): 1207-1210 (in Chinese).
[12] LEI J, WANG X, XIE G, et al. Turbulent flow field analysis of a jet in cross flow by DNS[J]. Journal of Engineering Thermophysics, 2015, 24(3): 259-269.
[13] LEI J, WANG X, XIE G. High performance computation of a jet in crossflow by lattice Boltzmann based parallel direct numerical simulation[J]. Mathematical Problems in Engineering, 2015, 2015: 1-11.
[14] SHANGGUAN Y, WANG X, LI Y. Large-scaled simulation on the coherent vortex evolution of a jet in a cross-flow based on lattice Boltzmann method[J]. Thermal Science, 2015, 19(3): 977-988.
[15] 上官燕琴, 王娴, 李跃明. 基于格子Boltzmann方法的平板射流大涡模拟[J]. 计算物理, 2015, 32(6): 669-676. SHANGGUAN Y Q, WANG X, LI Y M. High-performance numerical simulation of jet in cross-flow based on lattice Boltzmann method[J]. Chinese Journal of Computational Physics, 2015, 32(6): 669-676 (in Chinese).
[16] SHANGGUAN Y Q, WANG X, LI Y M. Investigation on the mixing mechanism of single-jet film cooling with various blowing ratios based on hybrid thermal lattice Boltzmann method[J]. International Journal of Heat & Mass Transfer, 2016, 97: 880-890.
[17] SHAHZAD K, FLECK B A, WILSON D J. Small scale modeling of vertical surface jets in cross-flow: Reynolds number and downwash effects[J]. Journal of Fluids Engineering, 2007, 129(3): 311-318.
[18] FEARN R, WESTON R P. Vorticity associated with a jet in a cross flow[J]. AIAA Journal, 2012, 12(12): 1666-1671.
[19] COUSSEMENT A, GICQUEL O, DEGREZ G. Large eddy simulation of a pulsed jet in cross-flow[J]. Journal of Fluid Mechanics, 2012, 695: 1-34.
[20] RUIZ A M, LACAZE G, OEFELEIN J C. Flow topologies and turbulence scales in a jet-in-cross-flow[J]. Physics of Fluids, 2015, 27(4): 531-553.
[21] 朱呈祥, 尤延铖. 横向气流中非牛顿液体射流直接数值模拟[J]. 航空学报, 2016, 37(9): 2659-2668. ZHU C X, YOU Y C. Direct numerical simulation of non-Newtonian liquid jet in crossflow[J]. Acta Aeronautica et Astronautica Sinica, 2016, 37(9): 2659-2668 (in Chinese).
[22] MUPPIDI S, MAHESH K. Two-dimensional model problem to explain counter-rotating vortex pair formation in a transverse jet[J]. Physics of Fluids, 2006, 18(8): 085103.
[23] CORTELEZZI L, KARAGOZIAN A R. On the formation of the counter-rotating vortex pair in transverse jets[J]. Journal of Fluid Mechanics, 2001, 446: 347-373.
[24] DONNADIEU C, ORTIZ S, CHOMAZ J M, et al. Three-dimensional instabilities and transient growth of a counter-rotating vortex pair[J]. Physics of Fluids, 2009, 21(9): 94-102.
[25] SCHLEGEL F, WEE D, MARZOUK Y M, et al. Contributions of the wall boundary layer to the formation of the counter-rotating vortex pair in transverse jets[J]. Journal of Fluid Mechanics, 2011, 676: 461-490.
[26] GOPALAN S, ABRAHAM B M, KATZ J. The structure of a jet in cross flow at low velocity ratios[J]. Physics of Fluids, 2004, 16(6): 2067-2087.
[27] CAMBONIE T, GAUTIER N, AIDER J L. Experimental study of counter-rotating vortex pair trajectories induced by a round jet in cross-flow at low velocity ratios[J]. Experiments in Fluids, 2013, 54(3): 1-13.
[28] YUAN L L, STREET R L, FERZIGER J H. Large-eddy simulations of a round jet in crossflow[J]. Journal of Fluid Mechanics, 1999, 379: 71-104.
[29] NEW T H, LIM T T, LUO S C. Effects of jet velocity profiles on a round jet in cross-flow[J]. Experiments in Fluids, 2006, 40(6): 859-875.
[30] YUAN L L, STREET R L. Trajectory and entrainment of a round jet in crossflow[J]. Physics of Fluids, 1998, 10(9): 2323-2335.
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