Abstract
In this study, experimental investigations were made regarding the effect of riblets on the streak instability in boundary layer. The streak instability is now regarded as a major source of the self-regeneration mechanism for the hairpin type coherent structures in turbulent boundary layer flow. Thus, it is important to control the instability to suppress the drag-inducing vortical structure in terms of drag reduction. Toward enhancing the measurement accuracy and spatial resolution, an enlarged version of riblets was applied to a streak which was artificially induced by a microwing in a laminar boundary layer. It is found that the riblets have attenuation effect on the streak instability, i.e., to reduce the spanwise velocity gradient of the quasi-streamwise streak in boundary layer.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
Abbreviations
- U0 :
-
Freestream velocity
- u′:
-
Turbulence intensity
- x 0 :
-
Location of the microwing/roughness elements in the streamwise coordinate
- y 0 :
-
Location of the microwing/roughness elements in the wall-normal coordinate
- δ* :
-
Displacement thickness of the boundary layer
References
Bechert, D. W. and Bartenwerfer, M., 1989, “The Viscous Flows on Surfaces with Longitudinal Ribs,”J. Fluid Mech., Vol. 206, pp. 105–129.
Blackwelder, R. F., 1983, “Analogies Between Transitional and Turbulent Boundary Layers,”Phys. Fluids, Vol. 26, pp. 2807–2815.
Boiko, A. V., Klingmann, B. G., Kozlov, V. V. and Alfredsson, P. H., 1994, “Experiments in a Boundary Layer Subjected to Free Stream Turbulence. Part 2: The Role of TS-Waves in the Transition Process,”J. Fluid Mech., Vol. 281, pp. 219–245.
Boiko, A. V., Kozlov, V. V., Syzrantsev, V. V. and Scherbakov, V. A., 1997, “Transition control by Riblets in Swept Wing Boundary Layer with Embedded Streamwise Vortex,”European Journal of Mechanics B/Fluids, Vol. 16, pp. 465–482.
Boiko, A. V., 2002, “Receptivity of a Flat Plate Boundary Layer to a Free Stream Axial Vortex,”European Journal of Mechanics B/Fluids, Vol. 21, pp. 325–340.
Choi, H., Moin, P. and Kim, J., 1993, “Direct Numerical Simulation of Turbulent Flow Over Riblets,”J. Fluid Mech., Vol. 255, pp. 503–539.
Choi, H., Moin, P. and Kim, J., 1991, “On the Effect of Riblets in Fully Developed Laminar Channel Flow,”Phys. Fluids A, Vol. 3, pp. 1892–1896.
Choi, K. -S., 1989, “Near-wall Structure of a Turbulent Boundary Layer with Riblets,”J. Fluid Mech., Vol. 208, pp. 417–458.
Coustols, E., 1992, “Performance of Internal Manipulators in Subsonic Three-Dimensional Flows,”Recent Developments in Turbulence (ed. Choi K.-S.), Kluwer Academic Publishers, pp. 43–64.
Gad-el-Hak, M., 1990, “Control of Low-Speed Airfoil Aerodynamics,”AlAA J., Vol. 28, pp. 1537–1552.
Grek, G. R., Kozlov, V. V. and Titarenko, S. V., 1993, “Investigation of Riblets Influence on Development of Vortex Generated by Suction/ Blowing on a Flat Plate,”Soviet Journal of Applied Physics, Vol. 6, pp. 31–45.
Grek, G. R., Kozlov, V. V., Titarenko, S.V. and Klingmann, B. G., 1995, “The Influence of Riblets on a Boundary Layer with Embedded Streamwise Vortices,”Phys. Fluids, Vol. 7, pp. 2504–2506.
Kachanov, Y. S., 1994, “Physical Mechanisms of Laminar-Boundary-Layer Transition,”Ann. Rev. Fluid Mech., Vol. 26, pp. 411–482.
Klebanoff, P. D., Tidstrom, K. D. and Sargent, L. M., 1962, “The Three-Dimensional Nature of Boundary-Layer Instability,”J. Fluid Mech., Vol. 12, pp. 1–34
Kline, S. J., Reynolds, W. C., Schraub, F. A. and Runstadler, P. W., 1967, “The Structure of Turbulent Boundary Layer,”J. Fluid Mech., Vol. 30, pp. 741–773.
Luchini, P., Manzo, F. and Pozzi, A., 1991, “Resistance of a Grooved Surface to Parallel Flow and Cross-Flow,”J. Fluid Mech., Vol. 228, pp. 87–109.
Schneider, M. and Dinkelacker, A., 1992, “Drag Reduction by Means of Surface Riblets on an Inclined body of Revolution,”7th European Drag Reduction Working Meeting, Submitted Abstract.
Walsh, M. J., 1983, “Riblets as a Viscous Drag Reduction Technique,”AIAA J., Vol. 21, pp. 485–486.
Westin, K. J. A., Boiko, A. V., Klingmann, B. G., Kozlov, V. V. and Alfredsson, P. H., 1994, “Experiments in a Boundary Layer Subjected to Free Stream Turbuelnce. Part 1: Boundary Layer Structure and Receptivity,”J. Fluid Mech., Vol. 281, pp. 193–218.
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
About this article
Cite this article
Boiko, A.V., Jung, K.H., Chun, H.H. et al. Effect of riblets on the streaky structures excited by free stream tip vortices in boundary layer. J Mech Sci Technol 21, 196–206 (2007). https://doi.org/10.1007/BF03161725
Received:
Revised:
Issue Date:
DOI: https://doi.org/10.1007/BF03161725