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Effects of Combustion Chamber Blockage on Bluff Body Flame Stabilization


Foster, James Roger (1956) Effects of Combustion Chamber Blockage on Bluff Body Flame Stabilization. Engineer's thesis, California Institute of Technology. doi:10.7907/T553-DA28.


The necessity for stabilizing a flame in a high speed flow of combustible gas has led to extensive studies of the mechanism of flame stabilization by bluff bodies. As a result of these studies it has been found that the stability limits depend directly on a characteristic wake length and that under certain conditions this characteristic dimension depends on the square root of the flame holder scale. In the present investigation the geometry of the flame in the stabilization region is examined by means of photographic and probing techniques. The results of the studies show conclusively that for a constant blockage ratio, the wake geometry scales linearly with flame holder size. The observed square root dependence of the characteristic wake length, and hence of the blowoff velocity is shown to be directly caused by blockage effects.

Item Type:Thesis (Engineer's thesis)
Subject Keywords:Aeronautical Engineering
Degree Grantor:California Institute of Technology
Division:Engineering and Applied Science
Major Option:Aeronautics
Thesis Availability:Public (worldwide access)
Research Advisor(s):
  • Zukoski, Edward E.
Thesis Committee:
  • Unknown, Unknown
Defense Date:1 January 1956
Record Number:CaltechETD:etd-03222004-164002
Persistent URL:
Default Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:1054
Deposited By: Imported from ETD-db
Deposited On:23 Mar 2004
Last Modified:13 Jul 2023 17:41

Thesis Files

PDF (Foster_jr_1956.pdf) - Final Version
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