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contributor authorLiu, Yan
contributor authorZhang, Tian
contributor authorZhang, Min
contributor authorZhang, Meng
date accessioned2017-05-09T01:29:22Z
date available2017-05-09T01:29:22Z
date issued2016
identifier issn0098-2202
identifier otherfe_138_03_031206.pdf
identifier urihttp://yetl.yabesh.ir/yetl/handle/yetl/161328
description abstractA comparative experimental and numerical analysis is carried out to assess the aerodynamic performance of a novel partial shroud in a straight turbine cascade. This partial shroud is designed as a combination of winglet and shroud. A plain tip is employed as a baseline case. A pure winglet tip is also studied for comparison. Both experiments and predictions demonstrate that this novel partial shroud configuration has aerodynamic advantages over the pure winglet arrangement. Predicted results show that, relative to the baseline blade with a plain tip, using the partial shroud can lead to a reduction of 20.89% in the massaveraged total pressure coefficient on the upper halfspan of a plane downstream of the cascade trailing edge and 16.53% in the tip leakage mass flow rate, whereas the pure winglet only decreases these two performance parameters by 11.36% and 1.32%, respectively. The flow physics is explored in detail to explain these results via topological analyses. The use of this new partial shroud significantly affects the topological structures and total pressure loss coefficients on various axial cross sections, particularly at the rear part of the blade passage. The partial shroud not only weakens the tip leakage vortex (TLV) but also reduces the strength of passage vortex near the casing (PVC) endwall. Furthermore, three partial shrouds with widthtopitch ratios of 3%, 5%, and 7% are considered. With an increase in the width of the winglet part, improvements in aerodynamics and the tip leakage mass flow rate are limited.
publisherThe American Society of Mechanical Engineers (ASME)
titleNumerical and Experimental Investigation of Aerodynamic Performance for a Straight Turbine Cascade With a Novel Partial Shroud
typeJournal Paper
journal volume138
journal issue3
journal titleJournal of Fluids Engineering
identifier doi10.1115/1.4031556
journal fristpage31206
journal lastpage31206
identifier eissn1528-901X
treeJournal of Fluids Engineering:;2016:;volume( 138 ):;issue: 003
contenttypeFulltext


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