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research-article

Influence of leakage flows on hot gas ingress

[+] Author and Article Information
Marios Patinios

Department of Mechanical Engineering, University of Bath, Bath, BA2 7AY, United Kingdom
m.patinios@bath.ac.uk

Irvin Ong

Department of Mechanical Engineering, University of Bath, Bath, BA2 7AY, United Kingdom
Irvin.l.ong@bath.edu

James Scobie

Department of Mechanical Engineering, University of Bath, Bath, BA2 7AY, United Kingdom
j.a.scobie@bath.ac.uk

Gary Lock

Department of Mechanical Engineering, University of Bath, Bath, BA2 7AY, United Kingdom
g.d.lock@bath.ac.uk

Carl Sangan

Department of Mechanical Engineering, University of Bath, Bath, BA2 7AY, United Kingdom
c.m.sangan@bath.ac.uk

1Corresponding author.

ASME doi:10.1115/1.4040846 History: Received June 29, 2018; Revised July 03, 2018

Abstract

One of the most important problems facing gas turbine designers today is the ingestion of hot mainstream gases into the wheel-space between the turbine disc (rotor) and its adjacent casing (stator). A rim seal is fitted at the periphery and a superposed sealant flow - typically fed through the bore of the stator - is used to prevent ingress. The majority of research studies investigating ingress do so in the absence of any leakage paths that exist throughout the engine's architecture. These inevitable pathways are found between the mating interfaces of adjacent pieces of hardware. In an environment where the turbine is subjected to aggressive thermal and centrifugal loading these interface gaps can be difficult to predict and the resulting leakage flows which pass through them even harder to account for. This paper describes....................(continued in manuscript)

Copyright (c) 2018 by ASME
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