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Dynamic response of cavitation turbomachines


Ng, Sheung-Lip (1976) Dynamic response of cavitation turbomachines. Dissertation (Ph.D.), California Institute of Technology. doi:10.7907/KC09-P112.


Stimulated by the pogo instability encountered in many liquid propellant rockets, the dynamic behavior of cavitating inducers is the subject of the present thesis. An experimental facility where the upstream and downstream flows of a cavitating inducer could be perturbed was constructed and tested. The upstream and downstream pressure and mass flow fluctuations were measured. Matrices representing the transfer functions across the inducer pump were calculated from these measurements and from the hydraulic system characteristics for two impellers in various states of cavitation. The transfer matrices when plotted against the perturbing frequency showed significant departure from steady state or quasi-steady predictions especially at higher frequencies.

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):
  • Acosta, Allan J.
Thesis Committee:
  • Unknown, Unknown
Defense Date:21 May 1976
Record Number:CaltechETD:etd-02272003-122146
Persistent URL:
Default Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:777
Deposited By: Imported from ETD-db
Deposited On:27 Feb 2003
Last Modified:20 Dec 2019 19:55

Thesis Files

PDF (Ng_sl_1976.pdf) - Final Version
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