Wake Behavior behind Turbine Cascades in Compressible Two-Dimensional Flows
The goal of the paper is to describe wake parameters of wakes from turbine cascades in compressible flows especially in planes where the leading edge of the following blade row would be located. Data from experiments with turbine cascades in compressible flow will be used to derive a theoretical app...
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| Main Author: | |
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| Format: | Article |
| Language: | English |
| Published: |
Wiley
2005-01-01
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| Series: | International Journal of Rotating Machinery |
| Subjects: | |
| Online Access: | http://dx.doi.org/10.1155/IJRM.2005.30 |
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| Summary: | The goal of the paper is to describe wake parameters of
wakes from turbine cascades in compressible flows especially in
planes where the leading edge of the following blade row would be
located. Data from experiments with turbine cascades in
compressible flow will be used to derive a theoretical approach
which describes the wake growth and the recovery of the velocity
deficit. The theory is based on similarity assumptions. The
derived equations depend on simple and readily available
parameters such as overall losses, exit angle, and Mach or Laval
number. In compressible turbine flows, the influence of the
inviscid flow field is of great importance. In this paper, an
approach to take this influence into account when determining the
behavior of the wake is presented. Correlations for basic
characteristics of wakes in compressible flows are not readily
available. Such correlations are necessary as input to unsteady
flow and heat transfer calculation procedures for turbomachine
blades. Based on available data on wake behavior in the
compressible flow behind turbine blades, the correlations
presented describe the wake behavior from the trailing edge to the
confluence of the wakes of adjacent blades. |
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| ISSN: | 1023-621X 1542-3034 |