Discussion: “An Experimental Evaluation of Drag Coefficient for Rectangular Cylinders Exposed to Grid Turbulence” (Courchesne, J., and Laneville, A., 1982, ASME J. Fluids Eng., 104, pp. 523–527)

This paper describes an experimental evaluation of the effects of the intensity and scale of turbulence on the drag coefficient of two-dimensional rectangular cylinders exposed to grid turbulence. It is observed that the mean drag coefficient is principally influenced, for a given cylinder, by the intensity of turbulence and that the scale of turbulence plays a secondary role.

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Closure to “Discussion of ‘An Experimental Evaluation of Drag Coefficient for Rectangular Cylinders Exposed to Grid Turbulence’” (1982, ASME J. Fluids Eng., 104, p. 527)

Journal of Fluids Engineering ◽

10.1115/1.3241899 ◽

1982 ◽

Vol 104 (4) ◽

pp. 527-528 ◽

Cited By ~ 1

Author(s):

J. Courchesne ◽

A. Laneville

Keyword(s):

Drag Coefficient ◽

Experimental Evaluation ◽

Grid Turbulence ◽

Rectangular Cylinders

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A Comparison of Correction Methods Used in the Evaluation of Drag Coefficient Measurements for Two-Dimensional Rectangular Cylinders

Journal of Fluids Engineering ◽

10.1115/1.3449019 ◽

1979 ◽

Vol 101 (4) ◽

pp. 506-510 ◽

Cited By ~ 29

Author(s):

J. Courchesne ◽

A. Laneville

Keyword(s):

Drag Coefficient ◽

Experimental Evaluation ◽

Uniform Flow ◽

Two Dimensional ◽

Rectangular Cylinders

This paper describes an experimental evaluation of available drag correction formulae and theories for blockage effects applicable to two-dimensional rectangular cylinders immersed in a low-turbulence uniform flow. It is observed that empirical formulae are functions of the afterbody length and that Maskell’s theory has the tendency to overestimate the correction.

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An Investigation of the Flow around Rectangular Cylinders

Aeronautical Quarterly ◽

10.1017/s0001925900006119 ◽

1972 ◽

Vol 23 (3) ◽

pp. 229-237 ◽

Cited By ~ 207

Author(s):

P W Bearman ◽

D M Trueman

Keyword(s):

Drag Coefficient ◽

Strouhal Number ◽

Pressure Coefficient ◽

Base Pressure ◽

Trailing Edge ◽

Rectangular Cylinders

SummaryMeasurements are presented of the base pressure coefficient, drag coefficient and Strouhal number of rectangular cylinders. The results confirm a finding in Japan that the drag coefficient rises to nearly 3 when the depth of the section is just over half the width. The flow around the sections is found to be strongly influenced by the presence of the trailing-edge corners.

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Pressure Distributions and Forces on Rectangular and D-shaped Cylinders

Aeronautical Quarterly ◽

10.1017/s0001925900006260 ◽

1972 ◽

Vol 23 (1) ◽

pp. 1-6 ◽

Cited By ~ 14

Author(s):

B R Bostock ◽

W A Mair

Keyword(s):

Boundary Layer ◽

Circular Cylinder ◽

Drag Coefficient ◽

Pressure Distribution ◽

Two Dimensional ◽

Dimensional Flow ◽

Pressure Distributions ◽

Two Dimensional Flow ◽

Rectangular Cylinders ◽

Shaped Section

SummaryMeasurements in two-dimensional flow on rectangular cylinders confirm earlier work of Nakaguchi et al in showing a maximum drag coefficient when the height h of the section (normal to the stream) is about 1.5 times the width d. Reattachment on the sides of the cylinder occurs only for h/d < 0.35.For cylinders of D-shaped section (Fig 1) the pressure distribution on the curved surface and the drag are considerably affected by the state of the boundary layer at separation, as for a circular cylinder. The lift is positive when the separation is turbulent and negative when it is laminar. It is found that simple empirical expressions for base pressure or drag, based on known values for the constituent half-bodies, are in general not satisfactory.

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