Hostname: page-component-8448b6f56d-wq2xx Total loading time: 0 Render date: 2024-04-19T06:09:49.419Z Has data issue: false hasContentIssue false
  • English
  • Français

The effects of turbulence on the mean flow past square rods

Published online by Cambridge University Press:  20 April 2006

Y. Nakamura  and
Y. Ohya
Y. Nakamura
Affiliation:
Research Institute for Applied Mechanics, Kyushu University, Kasuga, 816, Japan
Y. Ohya
Affiliation:
Research Institute for Applied Mechanics, Kyushu University, Kasuga, 816, Japan
Get access Rights & Permissions [Opens in a new window]

Abstract

There are two main effects of turbulence on the mean flow past rods of square cross-section aligned with the approaching flow. Small-scale turbulence increases the growth rate of the shear layer, while large-scale turbulence enhances the roll-up of the shear layer. The consequences of these depend on the length of a square rod. The mean base pressure of a square rod varies considerably with turbulence intensity and scale as well as with its length.

Type
Research Article
Information
Journal of Fluid Mechanics , Volume 137 , December 1983 , pp. 331 - 345
Copyright
© 1983 Cambridge University Press

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

Bearman, P. W. 1968 Some effects of turbulence on the flow around bluff bodies. In Proc. Symp. Wind Effects on Buildings and Structures, Loughborough Univ. Tech.
Bearman, P. W. 1971 An investigation of the forces on flat plates normal to a turbulent flow J. Fluid Mech. 46, 177–198.Google Scholar
Bearman, P. W. 1972 Some recent measurements of the flow around bluff bodies in smooth and turbulent streams. In Proc. Symp. External Flows, Univ. Bristol, pp. B1–B15.
Bearman, P. W. 1978 Turbulence effects on bluff body mean flow. In Proc. 3rd US Natl. Conf. Wind Enging. Res., Univ. Florida, pp. 265–272.
Bearman, P. W. 1980 Review - bluff body flows applicable to vehicle aerodynamics. Trans ASME I: J. Fluids Engng 102, 265–810.Google Scholar
Bearman, P. W. & Trueman, D. M. 1972 An investigation of the flow around rectangular cylinders Aero. Q. 23, 229–237.Google Scholar
Fage, A. & Warsap, J. H. 1929 The effects of turbulence and surface roughness on the drag of a circular cylinder. Aero. Res. Counc. R. & M 1283.Google Scholar
Hillier, R. & Cherry, N. J. 1981 Theeffects of stream turbulence on separation bubbles J. Wind Engng & Indust. Aerodyn. 8, 49–58.Google Scholar
Hinze, J. O. 1975 Turbulence, 2nd ed. McGraw-Hill.
Humphries, W. & Vincent, J. H. 1976 Experiments to investigate transport processes in the near wakes of disks in turbulent air flow J. Fluid Mech. 75, 737–749.Google Scholar
Laneville, A., Gartshore, I. S. & Parkinson, G. V. 1975 An explanation of some effects of turbulence on bluff bodies. In Proc. 4th Intl Conf. Wind Effects on Buildings and Structures, pp. 333–341. Cambridge University Press.
Laneville, A. & Williams, C. D. 1979 The effect of intensity and large scale turbulence on the mean pressure and drag coefficients of 2D rectangular cylinders. In Wind Engineering (ed. J. E. Cermak), vol. 1, pp. 397–404. Pergamon.
Maclennan, A. S. M. & Vincent, J. H. 1982 Transport in the near aerodynamic wakes of flat plates J. Fluid Mech. 120, 185–197.Google Scholar
Maskell, E. C. 1965 A theory of the blockage effects on bluff bodies and stalled wings in a closed wind tunnel. Aero. Res. Counc. R & M 3400.Google Scholar
Nakaguchi, H. 1978 Recent Japanese research on the three-dimensional bluff body flows relevant to road-vehicle aerodynamics. In Proc. Symp. Aerodyn. Drag Mechanisms of Bluff Bodies and Road Vehicles (ed. G. Sovran), pp. 227–252. Plenum.
Nakaguchi, H., Hashimoto, K. & Muto, S. 1968 An experimental study on aerodynamic drag of rectangular cylinders (in Japanese) J. Japan Soc. Aero. & Space Sci. 16, 1–5.Google Scholar
Nakamura, Y. & Ohya, Y. 1982 The effects of turbulence intensity and scale on the mean flow past square rods. In Proc. 5th Intl Colloq. Indust. Aerodyn., Building Aerodynamics Part 2, Aachen, pp. 137–146.
Nakamura, Y. & Tomonari, Y. 1976 The effect of turbulence on the drags of rectangular prisms Trans. Japan Soc. Aero. & Space Sci. 19, 81–86.Google Scholar
Nakamura, Y. & Tomonari, Y. 1981 The aerodynamic characteristics of D-section prisms in a smooth and in a turbulent flow Aero. Q. 32, 153–168.Google Scholar
Petty, D. G. 1979 The effect of turbulence intensity and scale on the flow past square prisms J. Indust. Aerodyn. 4, 247–252.Google Scholar
Roberson, J. A., Lin, C. Y., Rutherford, G. S. & Stine, M. D. 1972 Turbulence effects on drag of sharp-edged bodies. J. Hydraul. Div. ASCE (HY7), 1187–810.Google Scholar