Volume 2B: Turbomachinery 2017
DOI: 10.1115/gt2017-63055
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Numerical Study of the Flow Past an Axial Turbine Stator Casing and Perspectives for its Management

Abstract: The interaction of secondary flow with the main passage flow results in entropy generation; this accounts for considerable losses in turbomachines. Low aspect ratio blades in an axial turbine lead to a high degree of secondary flow losses. A particular interest is the reduction in secondary flow strength at the turbine casing, which adversely affects the turbine performance. This paper presents a selective review of effective techniques for improving the performance of axial turbines by turbine end wall modifi… Show more

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Cited by 5 publications
(3 citation statements)
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“…The shear stress transfer (SST) k-turbulence model 36,37 is employed to meet the computational accuracy demands. The convective transport equations for the turbulent kinetic energy k and its dissipation rate are solved primarily by the k-twoequation model.…”
Section: Numerical Methodologymentioning
confidence: 99%
“…The shear stress transfer (SST) k-turbulence model 36,37 is employed to meet the computational accuracy demands. The convective transport equations for the turbulent kinetic energy k and its dissipation rate are solved primarily by the k-twoequation model.…”
Section: Numerical Methodologymentioning
confidence: 99%
“…It therefore improves the surface transition between the grooved area and the remainder of the casing compared to using a Gaussian distribution as in Reutter et al [36]. This surface transition is explained in further details in Kadhim et al [35].…”
Section: Non-axisymmetric Upstream Stator Casing Designmentioning
confidence: 98%
“…By using NURBS surfaces, the cylindrical casing was represented as an exact geometry. The Beta distribution was used as it avoids by construction any mismatch in the surface radial height at the outer perimeter of the grooved area [35]. It therefore improves the surface transition between the grooved area and the remainder of the casing compared to using a Gaussian distribution as in Reutter et al [36].…”
Section: Non-axisymmetric Upstream Stator Casing Designmentioning
confidence: 99%