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The boundary layer for some axial symmetric flows

Citation

Mills, Roscoe H. (1935) The boundary layer for some axial symmetric flows. Dissertation (Ph.D.), California Institute of Technology. http://resolver.caltech.edu/CaltechETD:etd-05022008-122728

Abstract

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The following thesis consists of two sections. Part 1. deals with “The Boundary Layer for Some Axial Symmetric Flows”, Part 2. with “Preliminary Experiments on the Flow between Two Circular Disks”.

In Part 1. the laminar boundary layer equations for a flow impinging perpindicular to a flat circular disk are considered, assuming that the flow originates in an infinite line source,i.e., neglecting the region where the flow first contacts the disk. The velocity Q far from the disk is assumed proportional to […]. If the velocity in the boundary layer […] is taken proportional to […] and […] proportional to […] the boundary layer equation reduces to an ordinary differential equation. This equation is solved in three particular cases i.e. Q = constant, […] and […].

The case of practical interest […] is considered in some detail and velocity profiles for that case are calculated. These curves suggest the possibility in radial flow of obtaining stable profiles by accelerating the boundary layer.

In Part 2. some preliminary experimental results on the flow between two circular disks are presented.

Considerable difficulty with the entrance was encountered but by useing guide vanes a smooth out flow around the disk was obtained. The velosity profiles under such conditions showed no tendency toward a reversal of the flow.

The efficiency of the set up as a diffusor was quite satisfactory over the radial part of the flow; however for the entire set up including the entrance the efficiency is very poor.

Item Type:Thesis (Dissertation (Ph.D.))
Degree Grantor:California Institute of Technology
Division:Engineering and Applied Science
Major Option:Aeronautics
Thesis Availability:Public (worldwide access)
Research Advisor(s):
  • Von Kármán, Theodore
Thesis Committee:
  • Von Kármán, Theodore (chair)
  • Klein, Arthur Louis
  • Millikan, Clark Blanchard
  • Tollmien, Walter
Defense Date:1 January 1935
Record Number:CaltechETD:etd-05022008-122728
Persistent URL:http://resolver.caltech.edu/CaltechETD:etd-05022008-122728
Default Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:1585
Collection:CaltechTHESIS
Deposited By: Imported from ETD-db
Deposited On:16 May 2008
Last Modified:26 Dec 2012 02:39

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