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Effects of Purge Flow Configuration on Sealing Effectiveness in a Rotor-Stator Cavity

Volume 5B: Heat Transfer, 2017
Secondary air is bled from the compressor in a gas turbine engine to cool turbine components and seal the cavities between stages. Unsealed cavities can lead to hot gas ingestion, which can degrade critical components or, in extreme cases, can be catastrophic to engines. For this study, a 1.5 stage turbine with an engine-realistic rim seal was operated
Kenneth Clark, Michael Barringer, David Johnson, Karen Thole, Eric Grover, Christopher Robak   +5 more
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Effect of purge flow on endwall flow and heat transfer characteristics of a gas turbine blade

Applied Thermal Engineering, 2017
Abstract This paper presents a numerical investigation on the influence of purge flow on endwall flow and heat transfer characteristics of a gas turbine blade. Upon the numerical validation with experiment data, the Reynolds-averaged Navier-Stokes equations coupled with standard k - ω turbulence model are utilized in this study.
Zhenping Feng
exaly   +2 more sources

Numerical investigation of the interaction between upstream cavity purge flow and main flow in low aspect ratio turbine cascade

Chinese Journal of Aeronautics, 2013
In modern gas turbines, rim seal located between the stator-disc and rotor-disc is used to prevent hot-gas ingestion into the inner stage-gap of high pressure turbine. However, the purge flow supplied to the cavity through the rim seal interacts with the
Huoxing Liu
exaly   +2 more sources

The critical pressure drop for the purge process in the anode of a fuel cell

Journal of Power Sources, 2009
Purge operation is an effective way to remove the accumulated liquid water in the anode of proton exchange membrane fuel cells (PEMFCs). This paper studies the phenomenon of the two-phase now as well as the pressure drop fluctuation inside the flow field
Pingwen Ming, Yi Baolian
exaly   +2 more sources

The Interaction of Purge Flows With Secondary Flow Features in Turbine Center Frames

Volume 2C: Turbomachinery — Design Methods and CFD Modeling for Turbomachinery; Ducts, Noise, and Component Interactions, 2021
Abstract The turbine center frame (TCF) is an inherent component of modern turbofan aircraft engines, used for facilitating the large radius change between the high-pressure (HPT) and low-pressure (LPT) turbines. Secondary flow features that develop in the TCF result in total pressure loss of the mainstream flow and a subsequent ...
Patinios, Marios, Merli, Filippo, Hafizovic, Asim, Göttlich, Emil   +3 more
openaire   +1 more source

Purging flow protection of infrared telescopes

AIAA Journal, 1984
The use of a purging gas flow as a means of protecting the cryogenic optics in space infrared telescopes from condensible gaseous contaminants has been studied. The significance of both the purge/contaminant differential scattering cross section and the purge gas density distribution is analyzed.
E. P. Muntz, M. Hanson
openaire   +1 more source

Sensitivity of Turbine Efficiency and Flow Structures to Varying Purge Flow

Journal of Propulsion and Power, 2010
In many turbines, a small amount of air is ejected at the hub rim seal to prevent ingestion of hot gases into the cavity between the stator and the disk. This paper presents an experimental and computational investigation on the sensitivity of a 1.5-stage high-work axial turbine to varying purge flow rates equipped with nonaxisymmetric end walls.
Schuepbach, P., Abhari, R. S., Rose, M. G., Gier, J.   +3 more
openaire   +2 more sources

Towards the determination of regional purging flow rate

Building and Environment, 1997
Abstract This paper deals with the description and determination of the purging flow rate, U p , for ventilation systems or equivalent flow systems. The regional purging flow rate and its use are discussed and proposed. By using the mass conservation principle, U p is embodied in various accessible mathematical expressions in terms of the transfer ...
Shia-Hui Peng, Lars Davidson
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Refractory in Ladle Flow Control and Purging System

2020
Continuous strive towards new technology introduced reliable flow control systems that enable safe and prolong tapping liquid steel from ladle to tundish with consistent and high casting rate. Thus, synchronization of operational parameters, appropriate refractory and analysis of probable failure are essential and encountered.
Subir Biswas, Debasish Sarkar
openaire   +1 more source

Parameter sensitivity analysis of the interaction between purge flow and mainstream

Applied Thermal Engineering
Xing Yang
exaly   +2 more sources