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contributor authorH. E. Gallus
contributor authorC. Hah
contributor authorJ. Zeschky
date accessioned2017-05-08T23:48:33Z
date available2017-05-08T23:48:33Z
date copyrightOctober, 1995
date issued1995
identifier issn0889-504X
identifier otherJOTUEI-28646#562_1.pdf
identifier urihttp://yetl.yabesh.ir/yetl/handle/yetl/116110
description abstractDetailed experimental and numerical studies have been performed in a subsonic, axial-flow turbine stage to investigate the secondary flow field, the aerodynamic loss generation, and the spanwise mixing under a stage environment. The experimental study includes measurements of the static pressure distribution on the rotor blade surface and the rotor exit flow field using three-dimensional hot-wire and pneumatic probes. The rotor exit flow field was measured with an unsteady hot-wire probe, which has high temporal and spatial resolution. Both steady and unsteady numerical analyses were performed with a three-dimensional Navier–Stokes code for the multiple blade rows. Special attention was focused on how well the steady multiple-blade-row calculation predicts the rotor exit flow field and how much the blade interaction affects the radial distribution of flow properties at the stage exit. Detailed comparisons between the measurement and the steady calculation indicate that the steady multiple-blade-row calculation predicts the overall time-averaged flow field very well. However, the steady calculation does not predict the secondary flow at the stage exit accurately. The current study indicates that the passage vortex near the hub of the rotor is transported toward the midspan due to the blade interaction effects. Also, the structure of the secondary flow field at the exit of the rotor is significantly modified by the unsteady effects. The time-averaged secondary flow field and the radial distribution of the flow properties, which are used for the design of the following stage, can be predicted more accurately with the unsteady flow calculation.
publisherThe American Society of Mechanical Engineers (ASME)
titleEndwall and Unsteady Flow Phenomena in an Axial Turbine Stage
typeJournal Paper
journal volume117
journal issue4
journal titleJournal of Turbomachinery
identifier doi10.1115/1.2836568
journal fristpage562
journal lastpage570
identifier eissn1528-8900
keywordsTurbines
keywordsUnsteady flow
keywordsFlow (Dynamics)
keywordsRotors
keywordsBlades
keywordsProbes
keywordsWire
keywordsResolution (Optics)
keywordsDesign
keywordsNumerical analysis
keywordsPressure
keywordsMeasurement
keywordsVortices AND Axial flow
treeJournal of Turbomachinery:;1995:;volume( 117 ):;issue: 004
contenttypeFulltext


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