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Side Forces Resulting from Forward-Facing Steps and Injection Through a Slot in a Supersonic Flow


Cooper, Wayne Robert (1965) Side Forces Resulting from Forward-Facing Steps and Injection Through a Slot in a Supersonic Flow. Engineer's thesis, California Institute of Technology. doi:10.7907/GFPQ-FN54.


The pressure fields in front of steps and slot injections in a turbulent boundary layer were studied in an attempt to determine scaling parameters for the resulting side forces. Step and injection data of several experimenters, along with injection data taken by the author, were analyzed to determine the nature of the flow field. Observations of these studies and simplified theories led to simple dependence of the pressure field upon the variables and parameters of the flow. The step height was found to be a linear scaling parameter for the pressure field between separation and the step, and an equivalent step height with the same scaling quality was found for the injection data. A simple Mach number parameter was developed and found to be suitable for scaling the magnitude of the pressures. A graphical method based on observations of the character of the flow field was used to determine the point of separation for the injection data. The scaling parameters were applied to nitrogen and helium injection data taken at free stream Mach numbers of 2.56, 2.61, and 3.5 . The results indicate that the pressure field, and hence the side force, can be suitably scaled by use of the simple parameters developed here.

Item Type:Thesis (Engineer's thesis)
Subject Keywords:(Mechanical Engineering)
Degree Grantor:California Institute of Technology
Division:Engineering and Applied Science
Major Option:Mechanical Engineering
Thesis Availability:Public (worldwide access)
Research Advisor(s):
  • Zukoski, Edward E.
Thesis Committee:
  • Unknown, Unknown
Defense Date:26 May 1965
Record Number:CaltechETD:etd-09122002-121134
Persistent URL:
Default Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:3488
Deposited By: Imported from ETD-db
Deposited On:16 Sep 2002
Last Modified:08 Feb 2024 00:17

Thesis Files

PDF (Cooper_w_1965.pdf) - Final Version
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