Results 221 to 230 of about 72,535 (264)
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Effect of a rib on rim seal performance
International Communications in Heat and Mass Transfer, 2014Abstract The effect of a rib installed in a rim seal on sealing effectiveness was investigated using three-dimensional Reynolds-averaged Navier–Stokes analysis. A parametric study was performed for a single square rib installed on the surface on the rotor side.
Mi-Ae Moon +2 more
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Effects of Sealing Flow Supply Configuration with Holes on Sealing Effectiveness of Turbine Rim Seal
Journal of Thermal Science, 2022Zepeng Gai +4 more
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Large-Eddy Simulation of Rim Seal Ingestion
Volume 4: Heat Transfer, Parts A and B, 2010Unsteady flow dynamics in turbine rim seals are known to be complex and attempts accurately to predict the interaction of the mainstream flow with the secondary air system cooling flows using CFD with RANS turbulence models have proved difficult. In particular, published results from RANS models have over-predicted the sealing effectiveness of the rim ...
O'Mahoney, TSD +3 more
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A Novel Design of Rim Sealing Flow for Improving Sealing Effectiveness
Journal of Engineering for Gas Turbines and Power, 2023AbstractRim seal structures and sealing flows are essential in aero engines for preventing hot gas ingestion from mainstream to turbine disk cavities. A novel design method of rim sealing flow path based on auxiliary sealing holes and sealing air re-distributions has been proved to improve sealing effectiveness. The present paper uses this method to re-
Du Qiang +4 more
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Labyrinth Seal Design Change to Reduce Rim Seal Coolant
40th AIAA/ASME/SAE/ASEE Joint Propulsion Conference and Exhibit, 2004In order to seal the roto r-stator disc -rim cavities in the turbine section of gas turbine engines against hot gas ingestion, at least one labyrinth seal with several teeth is required in the rim cavity . In accordance with t he seal clearance and tooth pitch , an interesting interact ion between the supplied cooling flow and hot gas ingestion occur s
Dong-Chun Choi +2 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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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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