Hostname: page-component-cd9895bd7-gvvz8 Total loading time: 0 Render date: 2024-12-18T18:57:52.305Z Has data issue: false hasContentIssue false
  • English
  • Français

Wake interference of a row of normal flat plates arranged side by side in a uniform flow

Published online by Cambridge University Press:  21 April 2006

Masanori Hayashi ,
Akira Sakurai  and
Yuji Ohya
Masanori Hayashi
Affiliation:
Department of Aeronautical Engineering, Faculty of Engineering, Kyushu University, Fukuoka, 812, Japan
Akira Sakurai
Affiliation:
Department of Aeronautical Engineering, Faculty of Engineering, Kyushu University, Fukuoka, 812, Japan
Yuji Ohya
Affiliation:
Department of Resource Development and Mechanical Engineering, Faculty of Engineering, Kumamoto University, Kumamoto, 860, Japan
Get access Rights & Permissions [Opens in a new window]

Abstract

The wake characteristic of groups of normal flat plates, consisting of two, three, or four plates placed side by side with slits in between, have been investigated experimentally. When the ratio of the slit width to the plate width (slit ratio) was small, the gap flows were observed to be biased either upward or downward in a stable way, leading to multiple, stable flow patterns for a single slit-ratio value. Some regularities were recognized in the gap-flow directions and the appearance of the flow patterns. The plates on the biased side showed high drag and regular vortex shedding, while those on the unbiased side showed the opposite. The origin of the biased flow has also been investigated with water-tank experiments, numerical calculations and wind-tunnel experiments. The-results showed that the origin of biasing is strongly related to the vortex shedding of each plate of a row.

Type
Research Article
Information
Journal of Fluid Mechanics , Volume 164 , March 1986 , pp. 1 - 25
Copyright
© 1986 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. 1967 The effect of base bleed on the flow behind a two-dimensional model with a blunt trailing edge. Aero Q. 18, 207–224.Google Scholar
Bearman, P. W. & Trueman, D. M. 1972 An investigation of the flow around rectangular cylinders. Aero Q. 23, 229–237.Google Scholar
Beafrman, P. W. & Wadcock, A. J. 1973 The interaction between a pair of circular cylinders normal to a stream. J. Fluid Mech. 61, 499–511.Google Scholar
Biermann, D. & Herrnstein, W. H. 1933 The interference between struts in various combinations. NASA TR 468, pp. 515–524.
Castro, I. P. 1971 Wake characteristics of two-dimensional perforated plates normal to an air-stream. J. Fluid Mech. 46, 599–609.Google Scholar
Hayashi, M. 1972 On the wake vortices behind rectangular cylinders at low Reynolds numbers. Tech. Rep. Kyushu Univ. 45, no. 6, pp. 936–942 (in Japanese).Google Scholar
Hayashi, M., Sakurai, A. & Ohya, Y. 1983 Numerical and experimental studies of wake interference of two normal flat plates at low Reynolds numbers. Memoirs of the Faculty of Enginering, Kyushu Univ. 43, 165–177.Google Scholar
Honji, H. 1973a Viscous flows past a group of circular cylinders. J. Phys. Soc. Japan 34, 821–828.Google Scholar
Honji, H. 1973b Formation of a reversed flow bubble in the time-mean wake of a row of circular cylinders. J. Phys. Soc. Japan 35, 1533–1536.Google Scholar
Hori, E. 1959 Experiments of flow around a pair of parallel circular cylinders. In Proc. 9th Japan Nat. Cong. Appl. Mech., pp. 231–234.
Ishigai, S., Nishikawa, E., Nishimura, K. & Cho, K. 1972 Experimental study on structure of gas flow in tube banks with tube axes normal to flow. Part 1. Kármán vortex flow around two tubes at various spacings. Bull. JSME 15, 949–956.Google Scholar
Kamemoto, K. 1976 Formation and interaction of two parallel vortex streets. Bull. JSME 19, 283–290.Google Scholar
Kamemoto, K. & Bearman, P. W. 1980 An inviscid model of interactive vortex-shedding behind a pair of flat plates arranged side by side to approaching flow. Trans. JSME 46, 1229–1236.Google Scholar
Mizota, T. 1978 A technique for measuring unsteady flow velocities in the separated region. Trans. JSCE 10, 77–80.Google Scholar
Nakaguchi, H., Hashimoto, K. & Muto, S. 1968 An experimental study on aerodynamic drag of rectangular cylinders. J. Japan Soc. Aero. & Space Sci. 16, 1–5 (in Japanese).Google Scholar
Ohya, Y. 1983 Wake interference of a row of normal flat plates arranged side by side in a uniform flow. Ph.D. thesis, Kyushu University (in Japanese).
Okajima, A. & Sugitani, K. 1980 Fluid characteristics of a pair of circular cylinders normal to a uniform flow at very high Reynolds numbers. Bull. Res. Inst. Appl. Mech., Kyushu Univ. 53, 37–64 (in Japanese).Google Scholar
Quadflieg, H. 1977 Wirbelinduzierte Belastungen eines Zylinderpaares in inkompressibler Strömung bei grosZen Reynoldszahlen. Forsch. Ing.-Wes. 43, 9–18.Google Scholar
Spivack, H. M. 1946 Vortex frequency and flow pattern in the wake of two parallel cylinders at varied spacing normal to an air stream. J. Aero. Sci. 13, 289–301.Google Scholar
Stansby, P. K. 1981 A numerical study of vortex shedding from one and two circular cylinders. AeroQ. 32, 48–71.Google Scholar
Tritton, D. J. 1977 Physical Fluid Dynamics. Van Nostrand Reinhold.
Wood, C. J. 1964 The effect of base bleed on a periodic wake. J. R. Aero. Soc. 68, 477–482.Google Scholar
Zdravkovich, M. M. 1977 Review of flow interaction between two circular cylinders in various arrangements. Trans. ASME I: J. Fluids Engng 99, 618–632Google Scholar