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Experiments on the wall-pressure history in shock reflection processes

Citation

Baganoff, Donald (1964) Experiments on the wall-pressure history in shock reflection processes. Dissertation (Ph.D.), California Institute of Technology. http://resolver.caltech.edu/CaltechETD:etd-09122002-083236

Abstract

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The normal reflection of a plane shock from a plane wall is investigated experimentally using a pressure gauge which has a risetime of 0.1 [....] and no overshoot. Pressure histories of 5 [.....] duration can be obtained with this gauge. The experiments were conducted on the end wall of the GALCIT 17-in.-diameter shock tube.

Experimental results for three aspects of the reflection process are discussed: (1) profile for the reflected shock front, (2) effect of a cold wall, and (3) effect of a real gas.

It is concluded that the effect of a cold wall must play a comparatively minor role in the reflection process since the thickness of the recorded profile is comparable to the thickness of the incident shock, and the pressure jump across the profile is about 85 per cent of the ideal value. Also, the pressure history immediately behind the reflected shock can be approximated by boundary layer theory. The effect of a real gas was studied in carbon dioxide and it is shown that the relaxation process behind the incident shock produces a large effect on the recorded pressure history which provides a method of measuring the vibrational relaxation time in carbon dioxide for high temperatures.

Item Type:Thesis (Dissertation (Ph.D.))
Degree Grantor:California Institute of Technology
Division:Engineering and Applied Science
Major Option:Engineering and Applied Science
Thesis Availability:Public (worldwide access)
Research Advisor(s):
  • Unknown, Unknown
Thesis Committee:
  • Unknown, Unknown
Defense Date:14 May 1964
Record Number:CaltechETD:etd-09122002-083236
Persistent URL:http://resolver.caltech.edu/CaltechETD:etd-09122002-083236
Default Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:3478
Collection:CaltechTHESIS
Deposited By: Imported from ETD-db
Deposited On:13 Sep 2002
Last Modified:26 Dec 2012 03:00

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