Low free-stream turbulence in test sections through packed beds and fibrous mats

Low free-stream turbulence in test sections through packed beds and fibrous mats  At low speeds the free-stream turbulence in test-sections of water channels and wind tunnels can hardly be suppressed with a conventional set of screens in the settling chamber. In many cases the friction of screens is not high enough to quench the turbulence created by compressors, orifices, bends, diffusers, and nozzles. Without creating new turbulence the kinetic energy of already existing turbulence can only be eliminated by laminar friction somewhere upstream of the test-section. This laminar friction can be provided by packed beds and fibrous mats. Due to the small size of pellets or strands and due to the low speed in the settling chamber the corresponding Reynolds number may be low enough to achieve laminar or near laminar flow. An additional bonus may be obtained from the suppression of flow separation in the diffuser, if the packed bed or the fibrous mats are arranged downstream of the diffuser with a minimum required drag, whereas the drag of screens would be below this required minimum. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Experiments in Fluids Springer Journals

Low free-stream turbulence in test sections through packed beds and fibrous mats

Loading next page...
 
/lp/springer_journal/low-free-stream-turbulence-in-test-sections-through-packed-beds-and-8CehqbEKAh
Publisher
Springer-Verlag
Copyright
Copyright © 1999 by Springer-Verlag Berlin Heidelberg
Subject
Engineering; Engineering Fluid Dynamics; Fluid- and Aerodynamics; Engineering Thermodynamics, Heat and Mass Transfer
ISSN
0723-4864
eISSN
1432-1114
D.O.I.
10.1007/s003480050309
Publisher site
See Article on Publisher Site

Abstract

 At low speeds the free-stream turbulence in test-sections of water channels and wind tunnels can hardly be suppressed with a conventional set of screens in the settling chamber. In many cases the friction of screens is not high enough to quench the turbulence created by compressors, orifices, bends, diffusers, and nozzles. Without creating new turbulence the kinetic energy of already existing turbulence can only be eliminated by laminar friction somewhere upstream of the test-section. This laminar friction can be provided by packed beds and fibrous mats. Due to the small size of pellets or strands and due to the low speed in the settling chamber the corresponding Reynolds number may be low enough to achieve laminar or near laminar flow. An additional bonus may be obtained from the suppression of flow separation in the diffuser, if the packed bed or the fibrous mats are arranged downstream of the diffuser with a minimum required drag, whereas the drag of screens would be below this required minimum.

Journal

Experiments in FluidsSpringer Journals

Published: Apr 1, 1999

There are no references for this article.

You’re reading a free preview. Subscribe to read the entire article.


DeepDyve is your
personal research library

It’s your single place to instantly
discover and read the research
that matters to you.

Enjoy affordable access to
over 12 million articles from more than
10,000 peer-reviewed journals.

All for just $49/month

Explore the DeepDyve Library

Unlimited reading

Read as many articles as you need. Full articles with original layout, charts and figures. Read online, from anywhere.

Stay up to date

Keep up with your field with Personalized Recommendations and Follow Journals to get automatic updates.

Organize your research

It’s easy to organize your research with our built-in tools.

Your journals are on DeepDyve

Read from thousands of the leading scholarly journals from SpringerNature, Elsevier, Wiley-Blackwell, Oxford University Press and more.

All the latest content is available, no embargo periods.

See the journals in your area

DeepDyve Freelancer

DeepDyve Pro

Price
FREE
$49/month

$360/year
Save searches from
Google Scholar,
PubMed
Create lists to
organize your research
Export lists, citations
Read DeepDyve articles
Abstract access only
Unlimited access to over
18 million full-text articles
Print
20 pages/month
PDF Discount
20% off