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Numerical Investigations on the Sealing Effectiveness of Turbine Honeycomb Radial Rim Seal
Journal of Engineering for Gas Turbines and Power, 2016This paper presented a numerical comparison of the sealing performance between conventional radial rim seal and new-designed honeycomb radial rim seal with three sealing flow rates. Three-dimensional unsteady Reynolds-averaged Navier–Stokes (URANS) equations, coupled with a fully developed shear stress transport (SST) turbulent model from ansys-cfx ...
Jun Li +3 more
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A Rim Seal Orifice Model With 2 Cds and Effects of Swirl in Seals
Volume 4: Heat Transfer, Parts A and B, 2008Rim seal ingestion models for gas turbines are formulated to estimate the amount of hot fluid ingested through “clearance” seals into the disk cavity. Previous numerical and experimental studies showed the complex time-dependent, three-dimensional characteristics of the flow through the seals and in the outer region of the disk cavity.
Bruce V. Johnson +2 more
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On the Use of PSP to Determine the Rim Sealing Effectiveness
Volume 7B: Heat Transfer — General Interest/Additive Manufacturing Impacts on Heat Transfer; Internal Air Systems; Internal Cooling, 2023Abstract The control of cavities sealing has been a challenging problem since early gas turbine development stages and several aspects regarding the flow physics and the modelling of rim seal flows, especially in terms of unsteady phenomena, still represent an open question.
Orsini, Lorenzo +4 more
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Effective Sealing of a Disk Cavity Using a Double-Toothed Rim Seal
Volume 1: Turbomachinery, 1992The trend towards higher gas turbine inlet temperatures is a natural consequence of the pursuit of higher turbine operating efficiencies. More efficient disk cooling technology is therefore a prime need. The sealing characteristics of a advanced air-cooled turbo-expander disk cavity have been studied using laser sheet flow visualization and static ...
S. H. Bhavnani +5 more
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Egress Interaction Through Turbine Rim Seals
Volume 5B: Heat Transfer, 2017Engine designers require accurate predictions of ingestion (or ingress) principally caused by circumferential pressure asymmetry in the mainstream annulus. Cooling air systems provide purge flow designed to limit metal temperatures and protect vulnerable components from the hot gases which would otherwise be entrained into disc cavities through ...
James A. Scobie +3 more
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Numerical Investigations on the Sealing Effectiveness of Turbine Groove Radial Rim Seal
Volume 5B: Heat Transfer, 2019Abstract This paper presents a numerical comparison of sealing performance between conventional radial rim seal and seven different kinds of groove radial rim seal with three coolant flow rates. Three-dimensional unsteady Reynolds-Averaged Navier-Stokes (URANS) equations, coupled with a fully developed shear stress transport (SST ...
Shuxian Chen +4 more
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Aerothermal Analysis of a Turbine With Rim Seal Cavity
Volume 5A: Heat Transfer, 2014This study presents the results of the aerothermal analysis of an axial turbine with rim seal cavity using conjugate heat transfer computation (CHT). The CHT computations were performed for a two-stage turbine with stator well cavity at the sealing flow rates between 0–2% of the main annulus flow utilizing the commercial solver ANSYS CFX.
Huoxing Liu, Yuge An, Zhengping Zou
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Performance Evaluation of Various Rim-Seal Geometries
Journal of Thermophysics and Heat Transfer, 2015A numerical investigation has been performed to evaluate the performance of various rim seals in a gas turbine. Two performance functions of the rim seal related to sealing effectiveness and the loss coefficient of the main flow were analyzed for two rim-seal inlet velocities and three leakage fractions using three-dimensional Reynolds-averaged Navier ...
Mi-Ae Moon +2 more
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Volume 2B: Turbomachinery, 2016
The hot gas in mainstream can ingest into the stator-rotor wheel space through the working clearance between the rotating and stationary parts of a turbo machine. To avoid ingestion, a certain amount of compressor air is injected into the cavity. On one hand, it can lead to a significant loss of engine efficiency, so the injected air coming from the ...
Lixiang Wang, Hongwei Ma, Jinghui Zhang
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The hot gas in mainstream can ingest into the stator-rotor wheel space through the working clearance between the rotating and stationary parts of a turbo machine. To avoid ingestion, a certain amount of compressor air is injected into the cavity. On one hand, it can lead to a significant loss of engine efficiency, so the injected air coming from the ...
Lixiang Wang, Hongwei Ma, Jinghui Zhang
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Volume 3: Heat Transfer, Parts A and B, 2006
Turbine rim seal ingestion in gas turbines is influenced by many geometric and flow parameters. For turbine stages where the vanes and blades are closely spaced, the time-dependent pressure and flow fields near the seal strongly influence the rim seal ingestion.
Cheng-Zhang Wang +5 more
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Turbine rim seal ingestion in gas turbines is influenced by many geometric and flow parameters. For turbine stages where the vanes and blades are closely spaced, the time-dependent pressure and flow fields near the seal strongly influence the rim seal ingestion.
Cheng-Zhang Wang +5 more
openaire +1 more source