Effect of the Radial Pressure Gradient on the Secondary Flow Generated in an Annular Turbine Cascade
Author
Source
International Journal of Rotating Machinery
Issue
Vol. 2012, Issue 2012 (31 Dec. 2012), pp.1-14, 14 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2012-05-22
Country of Publication
Egypt
No. of Pages
14
Main Subjects
Abstract EN
This paper introduces an investigation of the effect of radial pressure gradient on the secondary flow generated in turbine cascades.
Laboratory measurements were performed using an annular sector cascade which allowed the investigation using relatively small number of blades.
The flow was measured upstream and downstream of the cascade using a calibrated five-hole pressure probe.
The three-dimensional Reynolds Averaged Navier Stokes equations were solved to understand flow physics.
Turbulence was modeled using eddy-viscosity assumption and the two-equation Shear Stress Transport (SST) k-ω model.
The results obtained through this study showed that the secondary flow is significantly affected by the pressure gradient along blade span.
The experimental measurements and the numerical calculations predicted passage vortex near blade hub which had larger and stronger values than that predicted near blade tip.
The loss distribution revealed that secondary flow loss was concentrated near blade hub.
It is recommended that attempts of reducing secondary flow in annular cascade should put emphasis on the passage vortex near the hub.
American Psychological Association (APA)
al-Batsh, Hashim M.. 2012. Effect of the Radial Pressure Gradient on the Secondary Flow Generated in an Annular Turbine Cascade. International Journal of Rotating Machinery،Vol. 2012, no. 2012, pp.1-14.
https://search.emarefa.net/detail/BIM-477293
Modern Language Association (MLA)
al-Batsh, Hashim M.. Effect of the Radial Pressure Gradient on the Secondary Flow Generated in an Annular Turbine Cascade. International Journal of Rotating Machinery No. 2012 (2012), pp.1-14.
https://search.emarefa.net/detail/BIM-477293
American Medical Association (AMA)
al-Batsh, Hashim M.. Effect of the Radial Pressure Gradient on the Secondary Flow Generated in an Annular Turbine Cascade. International Journal of Rotating Machinery. 2012. Vol. 2012, no. 2012, pp.1-14.
https://search.emarefa.net/detail/BIM-477293
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-477293