Results 231 to 240 of about 72,535 (264)

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, 2023
Abstract 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, Bonhan Goo, GeonHwan Cho, Seung Jin Song   +3 more
openaire   +1 more source

Influence of Secondary Sealing Flow on Performance of Turbine Axial Rim Seals

Journal of Thermal Science, 2020
Purge 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, Qiang Du, Guang Liu, Zengyan Lian, Lei Xie, Junqiang Zhu   +5 more
openaire   +1 more source

Rim Seal Ingestion Characteristics for Axial Gap Rim Seals in a Closely-Spaced Turbine Stage From a Numerical Simulation

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, Bruce V. Johnson, David F. Cloud, Roger E. Paolillo, T. K. Vashist, Ramendra P. Roy   +5 more
openaire   +1 more source

Numerical Investigations on the Sealing Effectiveness of Turbine Honeycomb Radial Rim Seal

Journal of Engineering for Gas Turbines and Power, 2016
This 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, Qing Gao, Zhigang Li, Zhenping Feng   +3 more
openaire   +1 more source

Effective Sealing of a Disk Cavity Using a Double-Toothed Rim Seal

Volume 1: Turbomachinery, 1992
The 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, V. I. Khilnani, L.-C. Tsai, J. M. Khodadadi, J. S. Goodling, J. Waggott   +5 more
openaire   +1 more source

Numerical Investigations on the Sealing Effectiveness of Turbine Groove Radial Rim Seal

Volume 5B: Heat Transfer, 2019
Abstract 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, Zhigang Li, Jun Li, Xin Yan, Liming Song   +4 more
openaire   +1 more source

Study of the turbine rim seal leakage

Herald of Aeroenginebuilding, 2017
 The article discusses the turbine rim seal and the processes occurring in it. The basic mechanisms of the hot gas inflow into the internal cavity are described. Features of the rim seal calculate in CFD software are shown. The algorithm of the rim seal calculating in unsteady calculation is created. Transient calculation of the total cavity model with
Tisarev, A.Yu., Vasilevich, N.M.
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Rim Seal Experiments and Analysis for Turbine Applications

Journal of Turbomachinery, 1992
An experimental investigation was conducted to determine the sealing effectiveness and the aerodynamic characteristics of four rim seal models for a number of flow conditions. The experiments were conducted to obtain an extended data base for advanced turbine rim seal design. The class of rim seals investigated are those found on the downstream side of
W. A. Daniels, B. V. Johnson, D. J. Graber, R. J. Martin   +3 more
openaire   +1 more source

Unsteady Computation of Ingress Through Turbine Rim Seals

Volume 5B: Heat Transfer, 2018
In high-pressure turbines, cool air is purged through rim seals at the periphery of wheel-spaces between the stator and rotor discs. The purge suppresses the ingress of hot gas from the annulus but superfluous use is inefficient. In this paper the interaction between the ingress, purge and mainstream flow is studied using unsteady numerical simulations
Joshua T. M. Horwood, Fabian P. Hualca, Mike Wilson, James A. Scobie, Carl M. Sangan, Gary D. Lock   +5 more
openaire   +1 more source

Large-Eddy Simulation of Turbine Rim Seal Flow

Volume 2A: Turbomachinery, 2018
The flow field in a complete one-stage axial-flow turbine with 30 stator and 62 rotor blades is investigated by large-eddy simulation (LES). To solve the compressible Navier-Stokes equations, a massively parallelized finite-volume flow solver based on an efficient Cartesian cut-cell/level-set approach, which ensures a strict conservation of mass ...
Alexej Pogorelov, Matthias Meinke, Wolfgang Schröder   +2 more
openaire   +1 more source