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contributor authorHavakechian, Said
contributor authorDenton, John
date accessioned2017-05-09T01:28:29Z
date available2017-05-09T01:28:29Z
date issued2016
identifier issn1528-8919
identifier othergtp_138_06_062601.pdf
identifier urihttp://yetl.yabesh.ir/yetl/handle/yetl/161090
description abstractOptimization of blade stacking in lowpressure (LP) steam turbine development constitutes one of the most delicate and timeconsuming parts of the design process. This is the second part of two papers focusing on stacking strategies applied to the last stage guide vane and represents an attempt to discern the aerodynamic targets that can be achieved by each of the wellknown and most often used basic stacking schemes. The effects of lean and twist have been investigated through an iterative process, involving comprehensive 3D computational fluid dynamics (CFD) modeling of the last two stages of a standard LP, where the basic lean and twist stacking schemes were applied on the last stage guide vanes while keeping the throat area (TA) unchanged. It has been found that it is possible to achieve the same target value and pattern of stage reaction by applying either tangential lean or an equivalent value of twist. Moreover, the significance of axial sweep on hub reaction has been found to become pronounced when the blade sweep is carried out at constant TA. The importance of hubprofiling has also been demonstrated and assessed. Detailed analysis of the flow fields has provided an overall picture, revealing the differences in the main flow parameters as produced by each of the alternative basic stacking schemes.
publisherThe American Society of Mechanical Engineers (ASME)
titleThree Dimensional Blade Stacking Strategies and Understanding of Flow Physics in Low Pressure Steam Turbines—Part II: Stacking Equivalence and Differentiators
typeJournal Paper
journal volume138
journal issue6
journal titleJournal of Engineering for Gas Turbines and Power
identifier doi10.1115/1.4031642
journal fristpage62601
journal lastpage62601
identifier eissn0742-4795
treeJournal of Engineering for Gas Turbines and Power:;2016:;volume( 138 ):;issue: 006
contenttypeFulltext


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