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Effects of Geometry on Sealing Effectiveness of a Rim Seal
Volume 5C: Heat Transfer, 2014A parametric study has been performed to find the effects of geometric parameters on sealing effectiveness of a rim seal, which is used to prevent the hot gas ingestion into the gas turbine component and to cool the turbine disk. The flow and temperature fields in the reference rim seal which was tested by Popović and Hodson have been investigated ...
Mi-Ae Moon +3 more
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Performance of a Finned Turbine Rim Seal
Volume 5C: Heat Transfer, 2014In gas turbines, rim seals are fitted at the periphery of the wheel-space between the turbine disc and its adjacent casing; their purpose is to reduce the ingress of hot mainstream gases. A superposed sealant flow, bled from the compressor, is used to purge the wheel-space or at least dilute the ingress to an acceptable level.
Carl M. Sangan +5 more
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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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Effect of Inflow Swirl on the Sealing Effectiveness of Turbine Rim Seal
Volume 7B: Heat Transfer — General Interest/Additive Manufacturing Impacts on Heat Transfer; Internal Air Systems; Internal Cooling, 2023Abstract Turbine inlet swirl condition is inherently present at the combustion chamber outlet and has an important influence on mainstream flow and gas ingestion. The sealing effectiveness and ingestion mechanism were numerically investigated using Unsteady Reynolds-Averaged Navier-Stokes (URANS) equations coupled with a fully developed ...
Qingfeng Cong +4 more
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Swirl Enhancement Effect on Turbine Rim Seal Performance
Volume 7B: Heat Transfer — General Interest/Additive Manufacturing Impacts on Heat Transfer; Internal Air Systems; Internal Cooling, 2023Abstract In gas turbines, sealing flow is extracted from the high-pressure compressor and supplied into the turbine wheel-space to suppress hot gas ingestion. Such hot gas ingestion is thought to be driven by the difference in either the static pressure or swirl between the mainstream and wheel-space flows.
Mingeun Choi +3 more
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Influence of Secondary Sealing Flow on Performance of Turbine Axial Rim Seals
Journal of Thermal Science, 2020Purge flow is of great importance in cooling turbine disks and sealing rotor-stator disc cavity to reduce hot gas ingestion in gas turbines. The amount of cooling air extracted from the compressor is crucial to engine efficiency. Excessive sealing air will cause not only a reduction in work transfer but also an increase in aerodynamic losses caused by ...
Ruonan Wang +5 more
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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
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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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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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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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