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Technique of Measuring Transverse Components of Velocity Fluctuations in Turbulent Flow


Zebb, George Keirn (1943) Technique of Measuring Transverse Components of Velocity Fluctuations in Turbulent Flow. Engineer's thesis, California Institute of Technology. doi:10.7907/H56H-BX29.


The mean speed characteristics of several X-type v'/U-meters having widely varied dimensions were measured in order to verify assumptions usually made regarding the range of linear characteristics for meters of this type.

Using the same meters, and other meters with intermediate sizes, values of v'/U were measured in the turbulent fields behind three grids. Comparison of the results gave a qualitative indication of the effect of meter size on turbulence measurements.

A length correction for the X-type meters used was derived and the turbulence values corrected, with the result that all meters gave approximately the same answers.

However, even after application of the length correction, it was found that in the turbulent field behind grids (generally assumed to be isotropic) v'/U was consistently lower than u'/U at a given distance behind the grid. This result is the same as that described by Corrsin in ref. (4) where no length correction was applied.

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):
  • Liepmann, Hans Wolfgang
Thesis Committee:
  • Unknown, Unknown
Defense Date:1 January 1943
Record Number:CaltechETD:etd-11242008-111753
Persistent URL:
Default Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:4655
Deposited By: Imported from ETD-db
Deposited On:11 Dec 2008
Last Modified:10 Nov 2023 17:47

Thesis Files

PDF (Zebb_k_1943.pdf) - Final Version
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