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Investigation of Blockage Effects on Circular Cylinders in a Two-Dimensional Wind Tunnel


Pounder, Edwin (1951) Investigation of Blockage Effects on Circular Cylinders in a Two-Dimensional Wind Tunnel. Engineer's thesis, California Institute of Technology. doi:10.7907/1F84-BB81.


These investigations include some experimental and theoretical studies upon blockage effects in a two-dimensional wind tunnel. The shape chosen to represent a body in the tunnel is that of a circular cylinder since such a body will eliminate circulation as a variable and will produce large blockage effects. In experimental studies, three cylinders of different size are tested in a two-dimensional tunnel. It is found that interference effects are of such a magnitude that it is impossible to obtain two-dimensional flow with the basic models. Two-dimensional flow is obtained through the use of separation devices, but a quantitative blockage study is not attained. The theoretical work attempts to show the blockage effects of a two-dimensional tunnel upon a circular cylinder of arbitrary size with and without a wake. The potential flow theory is used throughout, and some correlations with the experimental data are indicated.

Item Type:Thesis (Engineer's thesis)
Subject Keywords:Aeronautical engineering
Degree Grantor:California Institute of Technology
Division:Engineering and Applied Science
Major Option:Aeronautics
Thesis Availability:Public (worldwide access)
Research Advisor(s):
  • Bell, Richard William
Thesis Committee:
  • Unknown, Unknown
Defense Date:1 January 1951
Record Number:CaltechETD:etd-03312009-085215
Persistent URL:
Default Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:1229
Deposited By: Imported from ETD-db
Deposited On:31 Mar 2009
Last Modified:04 May 2023 17:12

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PDF (Pounder_e_1951.pdf) - Final Version
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