“I-Spots” and Emmons’ Spot Production Rate-Reference-Cited by-同舟云学术

“I-Spots” and Emmons’ Spot Production Rate

Published:2021-07-26 Issue:9 Volume:143 Page:
ISSN:0889-504X
Container-title:Journal of Turbomachinery
language:en
Short-container-title:

Author:

Mayle Robert E.¹²,Stripf Matthias³

Affiliation:

1. Roque Bluffs, ME 04654-3207;

2. Emeritus of Mechanical Engineering, Rensselaer Polytechnic Institute, Troy, NY

3. Institute for Thermo-Fluid-Dynamics, Karlsruhe University of Applied Sciences, Karlsruhe 76133, Germany

Abstract

Abstract A new intermittency function flagging the turbulent, becalmed, and non-becalmed regions of transitional flow is introduced. In addition, a method is developed to detect embedded incipient turbulent spots within the non-becalmed regions of the flow, which are then documented, counted, and related to Emmons’ spot production rate. This in turn is used to calculate an intermittency distribution which when compared with that measured displays an excellent agreement. Finally, it is shown that correlations based on Narasimha’s intermittency equation are highly questionable.

Publisher

ASME International

Subject

Mechanical Engineering

Link

http://asmedigitalcollection.asme.org/turbomachinery/article-pdf/143/9/091019/6732712/turbo_143_9_091019.pdf

Reference12 articles.

1. The Laminar-Turbulent Transition in a Boundary Layer—Part I;Emmons;J. Aero. Sci.,1951

2. Contributions on the Mechanics of Boundary-Layer Transition;Schubauer,1956

3. Some Properties of Boundary Layer Flow During Transition From Laminar to Turbulent Motion;Dhawan;J. Fluid. Mech.,1958

4. On the Distribution of Intermittency in the Transition Region of a Boundary Layer;Narasimha;J. Aero. Sci.,1957

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