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Hypersonic Wakes


McCarthy, John Francis (1962) Hypersonic Wakes. Dissertation (Ph.D.), California Institute of Technology. doi:10.7907/63NK-AG38.


An experimental investigation was made of the flow field behind a two-dimensional circular cylinder at a nominal Mach number of 5.7. The free-stream Reynolds number based on the cylinder diameter was varied over a range from 4300 to 66, 500 by changing both the diameter of the cylinder and the stagnation pressure of the wind tunnel. Pitot-pressure, static-pressure, and total-temperature measurements were made at various distances behind the cylindrical rod in order to determine the state properties in the wake. Base-pressure measurements were also taken at various Reynolds numbers. From these measurements, the transition from laminar to turbulent flow in the wake was determined and successfully correlated with other data. A transition Reynolds number based on local conditions and the length of laminar run was determined. Extensive comparison of the experimental data with Kubota's theory for laminar flow was then made. A satisfactory comparison was made between theory and experiment. Because of the nature of the tests conducted, only a qualitative comparison was made with the theory of Lees and Hromas for turbulent flow.

Item Type:Thesis (Dissertation (Ph.D.))
Subject Keywords:(Aeronautics and Physics)
Degree Grantor:California Institute of Technology
Division:Engineering and Applied Science
Major Option:Aeronautics
Minor Option:Physics
Thesis Availability:Public (worldwide access)
Research Advisor(s):
  • Kubota, Toshi (advisor)
  • Lees, Lester (advisor)
Thesis Committee:
  • Unknown, Unknown
Defense Date:1 January 1962
Record Number:CaltechETD:etd-03302009-092458
Persistent URL:
Default Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:1219
Deposited By: Imported from ETD-db
Deposited On:31 Mar 2009
Last Modified:05 Oct 2021 22:09

Thesis Files

PDF (McCarthy_jf_1962.pdf) - Final Version
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