LI Lingyu, LIU Jianxin. Stability of fundamental secondary instability streaky structures in a hypersonic boundary layer[J]. 2021, 39(5): 63-74.DOI: 10.7638/kqdlxxb-2020.0122.
Stability of fundamental secondary instability streaky structures in a hypersonic boundary layer
The fundamental secondary instability mode can be observed in the earlier stage of hypersonic boundary layer transition in recent direct numerical simulations and quiet wind tunnel experiments
which suggest the existence of streamwise streaks. This study investigated the generation mechanism of these streaky structures and their inviscid instability. In order to simplify the problem
the hypersonic boundary layer over a flat plate was focused on
and the instability was analyzed using both the linear stability theory (LST) and the secondary instability analysis (SIA). The results suggest that the dominant secondary instability mode can be affected by the amplitude of the two-dimensional primary mode (the second mode). When its amplitude is large
the fundamental mode is the dominant one
and mainly consists of streamwise streaky structures
or streamwise vortices. Inviscid bi-global analysis was used to investigate the instability of the streaks
and multiple inviscid modes were identified. The modes with lower frequencies can be seen as the extension of the first mode
and those with higher frequencies correspond to the second mode induced by the compressibility. This work makes a contribution on understanding the mechanism of hypersonic boundary layer breakdown.
关键词
Keywords
references
LUO J S. Transition and prediction for hypersonic boundary layers[J]. Acta Aeronautica et Astronautica Sinica, 2015, 36(1): 357-372(in Chinese).
LIU J X. A numerical investigation on inviscid instability of streaky structures in incompressible boundary layer flow[D]. Tianjin: Tianjin University, 2007 (in Chinese).
ZHANG C B. Research on nonlinear mode interactions relating to supersonic boundary layer transition[D]. Tianjin: Tianjin University, 2017(in Chinese).
KLEBANOFF P S, TIDSTROM K D, SARGENT L M. The three-dimensional nature of boundary-layer transition[J]. Journal of Fluid Mechanics, 1962, 12(01): 1-34.DOI: 10.1017/S0022112062000014.
KACHANOV Y S, YA LEVCHENKO V. The resonant interaction of disturbances at laminar-turbulent transition in a boundary layer[J]. Journal of Fluid Mechanics, 1984, 138: 209-247.
HERBERT T. Analysis of the subharmonic route to transition in boundary layers[C ] //22nd Aerospace Sciences Meeting, Reno, NV. Reston, Virginia: AIAA, 1984. doi: 10.2514/6.1984-9
HERBERT T. Secondary instability of boundary layers[J]. Annual Review of Fluid Mechanics, 1988, 20(1): 487-526.DOI: 10.1146/annurev.fl.20.010188.002415.
NG L L, ERLEBACHER G. Secondary instabilities in compressible boundary layers[J]. Physics of Fluids A: Fluid Dynamics, 1992, 4(4): 710-726.DOI: 10.1063/1.858290.
LIU J X. Evolution of disturbance in hypersonic blunt cone boundary layer at small angle of attack[D]. Tianjin: Tianjin University, 2010 (in Chinese).
CHOU A, WARD C, LETTERMAN L, et al. Transition research with temperature-sensitive paints in the boeing/AFOSR Mach-6 quiet tunnel[C ] //41st AIAA Fluid Dynamics Conference and Exhibit, Honolulu, Hawaii. Reston, Virginia: AIAA, 2011. doi: 10.2514/6.2011-3872
YU M, LUO J S. Nonlinear interaction mechanisms of disturbances in supersonic flat-plate boundary layers[J]. Science China Physics, Mechanics Astronomy, 2014, 57(11): 2141-2151.DOI: 10.1007/s11433-014-5568-0.
SIVASUBRAMANIAN J, FASEL H F. Direct numerical simulation of laminar-turbulent transition in a flared cone boundary layer at Mach 6[C ] //54th AIAA Aerospace Sciences Meeting, San Diego, California, USA. Reston, Virginia: AIAA, 2016. doi: 10.2514/6.2016-0846
HADER C, LEINEMANN M, FASEL H F. Direct numerical simulations of hypersonic boundary-layer transition for a flared cone: fundamental breakdown[J]. Journal of Fluid Mechanics, 2019, 869: 341-384. https://doi.org/10.1017/jfm.2019.202
LIU J X. The fundamental secondary instability of the primary mack mode in hypersonic boundary layers on flat plates[J]. Advances in Applied Mathematics and Mechanics, 2019, 11(3): 559-570.DOI: 10.4208/aamm.2018.s01.
YU G T. Application of e-N method and prediction of disturbances propagation in three-dimensional hypersonic boundary layers[D]. Tianjin: Tianjin University, 2016 (in Chinese).
WARD C, HENDERSON R, SCHNEIDER S P. Secondary instability of stationary crossflow vortices on an inclined cone at Mach 6[C ] //45th AIAA Fluid Dynamics Conference, Dallas, TX. Reston, Virginia: AIAA, 2015. doi: 10.2514/6.2015-2773
LI F, CHOUDHARI M, CHANG C L, et al. Development and breakdown of Görtler vortices in high speed boundary layers[C ] //48th AIAA Aerospace Sciences Meeting Including the New Horizons Forum and Aerospace Exposition, Orlando, Florida. Reston, Virginia: AIAA, 2010. doi: 10.2514/6.2010-705
PAREDES P, THEOFILIS V. Centerline instabilities on the hypersonic international flight research experimentation HIFiRE-5 elliptic cone model[J]. Journal of Fluids and Structures, 2015, 53: 36-49.DOI: 10.1016/j.jfluidstructs.2014.11.002.
REN J. Secondary instabilities of Görtler vortices in high-speed boundary layers and control on flow transition[D]. Beijing: Tsinghua University, 2015 (in Chinese).
LEIB S J, WUNDROW D W, GOLDSTEIN M E. Effect of free-stream turbulence and other vortical disturbances on a laminar boundary layer[J]. Journal of Fluid Mechanics, 1999, 380: 169-203.
ZHOU H, SU C H, ZHANG Y M. Transition mechanism and prediction of supersonic/high supersonic boundary layer[M]. Beijing: Science Press, 2015 (in Chinese).
LEHOUCQ R B, SORENSEN D C, YANG C. ARPACK users' guide: solution of large-scale eigenvalue problems with implicitly restarted Arnoldi methods[M]. DBLP, 1998.