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Slender-Body Hypervelocity Boundary-Layer Instability


Parziale, Nicholaus J. (2013) Slender-Body Hypervelocity Boundary-Layer Instability. Dissertation (Ph.D.), California Institute of Technology. doi:10.7907/KZJ1-Y009.


With novel application of optical techniques, the slender-body hypervelocity boundary-layer instability is characterized in the previously unexplored regime where thermo-chemical effects are important. Narrowband disturbances (500-3000 kHz) are measured in boundary layers with edge velocities of up to 5~km/s at two points along the generator of a 5 degree half angle cone. Experimental amplification factor spectra are presented. Linear stability and PSE analysis is performed, with fair prediction of the frequency content of the disturbances; however, the analysis over-predicts the amplification of disturbances. The results of this work have two key implications: 1) the acoustic instability is present and may be studied in a large-scale hypervelocity reflected-shock tunnel, and 2) the new data set provides a new basis on which the instability can be studied.

Item Type:Thesis (Dissertation (Ph.D.))
Subject Keywords:hypersonic; boundary; layer; hypervelocity; instability; high-speed; optics; interferometry; FLDI; laser;
Degree Grantor:California Institute of Technology
Division:Engineering and Applied Science
Major Option:Aeronautics
Awards:Ernest E. Sechler Memorial Award in Aeronautics, 2013.
Thesis Availability:Public (worldwide access)
Research Advisor(s):
  • Shepherd, Joseph E. (advisor)
  • Hornung, Hans G. (co-advisor)
Group:GALCIT, Explosion Dynamics Laboratory
Thesis Committee:
  • Blanquart, Guillaume (chair)
  • McKeon, Beverley J.
  • Shepherd, Joseph E.
  • Hornung, Hans G.
Defense Date:15 May 2013
Non-Caltech Author Email:nick.parziale (AT)
Funding AgencyGrant Number
Record Number:CaltechTHESIS:05312013-164534236
Persistent URL:
Related URLs:
URLURL TypeDescription DocumentT5 Hypervelocity Shock Tunnel Facility website
Parziale, Nicholaus J.0000-0001-9880-1727
Default Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:7808
Deposited By: Nicholaus Parziale
Deposited On:27 Jan 2014 18:01
Last Modified:16 Jan 2021 00:29

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