0
research-article

An Experimental Investigation of the Dynamics of a Blade with Two Under-Platform Dampers

[+] Author and Article Information
Daniele Botto

Associate Professor, Department of Mechanical and Aerospace Engineering, Politecnico di Torino, Corso Duca degli Abruzzi, 24, Torino, 10129
daniele.botto@polito.it

Chiara Gastaldi

Assistant Researcher, Department of Mechanical and Aerospace Engineering, Politecnico di Torino
chiara.gastaldi@polito.it

Muzio M. Gola

Professor, Department of Mechanical and Aerospace Engineering, Politecnico di Torino
muzio.gola@polito.it

Muhammad Umer

PhD student, Department of Mechanical and Aerospace Engineering, Politecnico di Torino
muhammad.umer@polito.it

1Corresponding author.

ASME doi:10.1115/1.4037865 History: Received July 13, 2017; Revised July 20, 2017

Abstract

Several experimental apparatus have been designed in the past to evaluate the effectiveness of under-platform dampers. Most of these experimental setups allow to measure the overall damper efficiency in terms of reduction of vibration amplitude in turbine blades. The experimental data collected with these test rigs do not increase the knowledge about the damper dynamics and therefore the uncertainty on the damper behavior remains a big issue. In this paper a different approach to evaluate the damper-blade interaction has been put forward. A test rig has been purposely designed to accommodate a single blade and two under-platform dampers. One side of each damper is in contact with a ground support specifically designed to measure two independent forces on the damper. In this way both the normal and the tangential force components in the damper-blade contact can be inferred. Damper kinematics is rebuilt by using the relative displacement measured between damper and blade. This paper describes the concept behind the new approach, shows the details of the new test rig and discuss the blade frequency response from a new point of view.

Copyright (c) 2017 by ASME
Your Session has timed out. Please sign back in to continue.

References

Figures

Tables

Errata

Discussions

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related Journal Articles
Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In