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Combustion in Laminar Mixing Regions and Boundary Layers


Dooley, Donald Allen (1956) Combustion in Laminar Mixing Regions and Boundary Layers. Dissertation (Ph.D.), California Institute of Technology. doi:10.7907/MGTH-TS83.


The governing relations for gaseous flow systems with chemical reaction are briefly discussed. A mixture of mechanically similar Maxwellian molecules is assumed and the general relations are then reduced to the simplified forms appropriate for reacting, laminar boundary layer type flow systems. One-step unopposed, "global" reactions following first-order, second-order, and third-order kinetics are considered. The simplified governing relations are transformed to an equivalent constant density plane by application of the Howarth transformation. A similarity function relating the specie concentrations to the local temperature is found for the case of equal Prandtl and Schmidt numbers. The similarity function is shown to be equal to the dimensionless streamwise velocity when the Prandtl and Schmidt numbers are both equal to unity. The remaining governing relations are then transformed to the Blasius plane in which the velocity field has known solutions. The energy equation is solved by an iteration process; a general analytic solution for the N'th approximation is obtained. The analytic techniques developed are applied to the problems of combustion within laminar mixing regions and boundary layers. Temperature and concentration profiles are calculated and the dependence of the characteristic stay time upon the parameters of the system is determined. The application of the similarity techniques to the problem of chemical reaction within a hypersonic boundary layer is briefly discussed in an Appendix.

Item Type:Thesis (Dissertation (Ph.D.))
Subject Keywords:(Aeronautics and Physics)
Degree Grantor:California Institute of Technology
Division:Engineering and Applied Science
Major Option:Aeronautics
Minor Option:Physics
Thesis Availability:Public (worldwide access)
Research Advisor(s):
  • Marble, Frank E.
Thesis Committee:
  • Unknown, Unknown
Defense Date:1 January 1956
Additional Information:Title varies in 1956 Caltech commencement: "Flame Stabilization on Streamlined Bodies"
Record Number:CaltechETD:etd-03222004-162749
Persistent URL:
Default Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:1052
Deposited By: Imported from ETD-db
Deposited On:23 Mar 2004
Last Modified:13 Jul 2023 17:31

Thesis Files

PDF (Dooley_da_1956.pdf) - Final Version
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