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An experimental study of the high speed interaction between a labyrinth seal and an abradable coating in a turbo-engine application

Delebarre, Corentin and Wagner, Vincent and Paris, Jean-Yves and Dessein, Gilles and Denape, Jean and Gurt Santanach, Julien An experimental study of the high speed interaction between a labyrinth seal and an abradable coating in a turbo-engine application. (2014) Wear, 316 (1-2). 109-118. ISSN 0043-1648

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Official URL: http://dx.doi.org/10.1016/j.wear.2014.04.023

Abstract

A new high-speed test rig was designed to simulate the interactions between labyrinth seals and abradable coatings in similar turbo-engine operating conditions. To determine a solution for turbo-engine efficiency enhancement, we investigated the clearance reduction between the rotary parts in air systems, the successive starts and stops, the thermal expansion and the vibrations that might cause direct rub interactions between a rotary seal, known as a labyrinth seal, and a turbo-engine housing coated with a sacrificial abradable material. High interaction speeds from 0 to 130 m s−1 were obtained using a 5-axis milling machine fitted with a unique magnetic bearings spindle developed specifically for the study. The purpose of this paper is to study the interaction phenomena between an abradable material (Al–Si 6%) and a nickel alloy (Alloy 718) to obtain a first contact assessment under different turbo-engine operating conditions. The experimental results are first presented by visual observations of the posttest samples, as specified by accurate profile measurements. A quantitative approach to the interaction forces recorded during the tests and micrographic observations complete the preliminary study. This work provides new basic data for a preliminary study of the interaction between labyrinth seal teeth tips and abradable coatings in turbo-engine applications.

Item Type:Article
Additional Information:Thanks to Elsevier editor. The definitive version is available at http://www.sciencedirect.com The original PDF of the article can be found at Wear website : http://dx.doi.org/10.1016/j.wear.2014.04.023
HAL Id:hal-01060023
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:Université de Toulouse > Institut National Polytechnique de Toulouse - INPT (FRANCE)
Other partners > Turbomeca (FRANCE)
Laboratory name:
Funders:
SAFRAN-TURBOMECA - Agence Nationale de la Recherche et de la Technologie (ANRT)
Statistics:download
Deposited By: Gilles Dessein
Deposited On:07 Jul 2014 10:22

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