Results 31 to 40 of about 215,871 (234)
Novel high-pressure turbine purge control features for increased stage efficiency
Journal of the Global Power and Propulsion Society, 2017 Rim seals throttle flow and have shown to impact the aerodynamic performance of gas turbines. The results of an experimental investigation of a rim seal exit geometry variation and its impact on the high-pressure turbine flow field are presented.
Rainer Schädler +5 more
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Flow and Ingestion in a Turbine Disc Cavity under Rotationally-Dominated Conditions
International Journal of Turbomachinery, Propulsion and Power, 2021 An investigation of hot gas ingestion driven by the disc pumping effect in a chute seal was conducted at the Oxford Rotor Facility. Measurements of mean pressure, unsteady pressure and gas concentration have been logged and analysed under different ...
Anna Bru Revert +2 more
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Numerical study of turbine rim seals performance with different sealing structures
Revista Internacional de Métodos Numéricos para Cálculo y Diseño en Ingeniería, 2022 The unsteady large-scale vortex near the turbine rim has an important influence on the sealing performance. Characteristics and performance of four sealing structures are researched in this paper. Three-dimensional unsteady numerical simulation was adopted to deeply reveal the characteristics of the rim sealing vortex and its influence mechanism on the
T. Bai, Q. Yang, J. Liu, Y. Shi, S. Qiao
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International Journal of Turbomachinery, Propulsion and Power, 2023 The efficiency assessment of a high-pressure turbine (HPT) stage is complicated by the presence of upstream and downstream purge flows. In fact, the efficiency calculation is often based on mass flow-averaged values of total temperature at the stage ...
Filippo Merli +3 more
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Rim Sealing of Rotor-Stator Wheelspaces in the Presence of External Flow [PDF]
Volume 1: Turbomachinery, 1991 Sealing of the cavity formed between a rotating disc and a stator with an asymmetric external flow is considered. In these circumstances circumferential pressure variations in the external flow and the pumping action of the disc may draw fluid into the cavity.
CHEW, JW, DADKHAH, S, TURNER, AB
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Computational and Mathematical Modeling of Turbine Rim Seal Ingestion
Journal of Turbomachinery, 2001 Abstract Understanding and modeling of main annulus gas ingestion through turbine rim seals is considered and advanced in this paper. Unsteady three-dimensional computational fluid dynamics (CFD) calculations and results from a more elementary model are presented and compared with experimental data previously published by Hills et al ...
Hills, NJ, Chew, JW, Turner, AB
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Aerospace, 2019 Flow within the space between the rotor and stator of a turbine disk, and an area referred to as the rim seal cavity, develops azimuthal velocity component from the rotor disk.
Cengiz Camci +2 more
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Flow characteristics in turbine wheel space cavity
Energy Reports, 2021 Unsteady flow structures unrelated to rotating frequency in the turbine wheel space cavity has been observed and reported in a number of recent rim sealing investigations.
Lei Xie +4 more
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Large Eddy Simulation of Externally Induced Ingress about an Axial Seal by Stator Vanes
Energies, 2023 Turbine inlet temperatures in advanced gas turbines could be as high as 2000 °C. To prevent ingress of this hot gas into the wheelspace between the stator and rotor disks, whose metals can only handle temperatures up to 850 °C, rim seals and sealing ...
Sabina Nketia +3 more
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Propulsion and Power Research, 2021 In turbine disk cavity, rim seals are fitted between the stator and its adjacent rotor disk. A coolant air injected through the turbine disk cavity to prevent the ingress of mainstream hot gases.
Zakaria Mansouri
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