NDLI: Secondary flow effects in relatively narrow channels

Content Provider	Springer Nature Link
Author	Dvořák, Rudolf
Copyright Year	2003
Abstract	Secondary flow effects were discussed in numerous papers at the past ISAIF Symposia, mainly in connection with turbine or compressor cascades$^{[1]}$. This paper will complement these papers by looking at the problem from the channel (or blade passages) geometry point of view. If we describe as secondary flows any flows in planes perpendicular to the main flow direction, then there are at least three kinds of secondary flows in a typical turbine rotor cascade: -secondary flows of the 1st kind, generated by centrifugal forces in closed curved channels, -secondary flows of the 2nd kind, generated by interacting boundary layers, mainly in corners (this will include even the horseshoe vortices), -secondary flows due to mass inflow through the tip clearance. Quite often all the secondary flow vortices merge downstream into a passage vortex with a non-negligible contribution to the channel (cascade) losses, and it is worth investigating the individual contributions to these losses to take them into account in the design procedure.
Starting Page	209
Ending Page	213
Page Count	5
File Format	PDF
ISSN	10032169
Journal	Journal of Thermal Science
Volume Number	12
Issue Number	3
e-ISSN	1993033X
Language	English
Publisher	Science Press
Publisher Date	2003-01-01
Publisher Place	Beijing
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	channel flows flows flow separation Mechanics, Fluids, Thermodynamics Engineering Fluid Dynamics Engineering Thermodynamics, Transport Phenomena
Content Type	Text
Resource Type	Article
Subject	Condensed Matter Physics

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