Experimental investigation on the effects of wake passing frequency on boundary layer transition in high-lift low-pressure turbines

Experimental investigation on the effects of wake passing frequency on boundary layer transition... Detailed experimental investigation was carried out to investigate the interaction of unsteady wakes with boundary layer in a high-lift low-pressure turbine. Extensive measurements about boundary layer character were conducted using hot-film and hot-wire methods. In-depth analysis of the effect of wake passing frequency on boundary layer transition was carried out. The strength of separation control and profile loss variation at two wake passing frequencies were also studied. The results show that wake-induced transition can be detected in the separating shear layer, and complex vortex structures are induced by the interaction between the negative jet of wake and separation bubble. The proportions of laminar, separation and turbulence friction loss in the total loss vary with wake passing frequency, which leads to the change in the total boundary layer loss. In particular, as the wake passing frequency changes, the laminar and turbulent friction loss show opposite trends, and this indicates that the best frequency can be achieved by balancing these two types of losses. For a given high-lift profile, an optimum wake passing frequency that will lead to the minimum loss exists. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Experiments in Fluids Springer Journals

Experimental investigation on the effects of wake passing frequency on boundary layer transition in high-lift low-pressure turbines

Loading next page...
 
/lp/springer_journal/experimental-investigation-on-the-effects-of-wake-passing-frequency-on-DsznYRT3if
Publisher
Springer Berlin Heidelberg
Copyright
Copyright © 2015 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/s00348-015-1947-1
Publisher site
See Article on Publisher Site

Abstract

Detailed experimental investigation was carried out to investigate the interaction of unsteady wakes with boundary layer in a high-lift low-pressure turbine. Extensive measurements about boundary layer character were conducted using hot-film and hot-wire methods. In-depth analysis of the effect of wake passing frequency on boundary layer transition was carried out. The strength of separation control and profile loss variation at two wake passing frequencies were also studied. The results show that wake-induced transition can be detected in the separating shear layer, and complex vortex structures are induced by the interaction between the negative jet of wake and separation bubble. The proportions of laminar, separation and turbulence friction loss in the total loss vary with wake passing frequency, which leads to the change in the total boundary layer loss. In particular, as the wake passing frequency changes, the laminar and turbulent friction loss show opposite trends, and this indicates that the best frequency can be achieved by balancing these two types of losses. For a given high-lift profile, an optimum wake passing frequency that will lead to the minimum loss exists.

Journal

Experiments in FluidsSpringer Journals

Published: Apr 7, 2015

References

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 18 million articles from more than
15,000 peer-reviewed journals.

All for just $49/month

Explore the DeepDyve Library

Search

Query the DeepDyve database, plus search all of PubMed and Google Scholar seamlessly

Organize

Save any article or search result from DeepDyve, PubMed, and Google Scholar... all in one place.

Access

Get unlimited, online access to over 18 million full-text articles from more than 15,000 scientific journals.

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