Change search
ReferencesLink to record
Permanent link

Direct link
Assessment of a 3D Linear Flutter Prediction Tool using Sector Cascade Test Data
KTH, School of Industrial Engineering and Management (ITM), Energy Technology, Heat and Power Technology.
KTH, School of Industrial Engineering and Management (ITM), Energy Technology, Heat and Power Technology.
2005 (English)In: Proceedings of the ASME Turbo Expo 2005, Vol 4, ASME Press, 2005, 613-623 p.Conference paper (Refereed)
Abstract [en]

An assessment and validation of a numerical prediction tool for flutter are made using new experimental data from experiments on turbine blades in a sector cascade. The 3D geometry is that of a low-pressure (LP) turbine blade with twist and a profile that changes along span in an annular sector cascade. The numerical model is a linear harmonic Euler equation solver. Rig results are obtained for the blade by oscillating I blade out of 7 in the annular sector cascade. The blade is oscillated in the rig using a mechanical type of actuator to control the mode. The mode shapes in the rig consist of torsion and bending modes around a pivot mechanism fixed inside the hub end wall. The frequencies obtained in the rig are in the range up to 219 Hz, or reduced frequency based on full chord k=0.5, which covers the range of useful reduced frequencies typically found in turbine designs. Under reference running conditions the unsteady pressure responses are found qualitatively in line with the experiment. The test case is shown to be challenging to the numerical tool in terms of effects of tip clearance as well as off-design effects. In order to improve results tip clearance modeling and inclusion of viscous terms are identified as key factors.

Place, publisher, year, edition, pages
ASME Press, 2005. 613-623 p.
Keyword [en]
Euler equations, Low-pressure (LP), Numerical prediction tool, Pressure responses
National Category
Energy Engineering
URN: urn:nbn:se:kth:diva-78416DOI: 10.1115/GT2005-68453ISI: 000243376700068ScopusID: 2-s2.0-27744445065ISBN: 0-7918-4727-6OAI: diva2:492455
ASME Turbo Expo 2005 - Gas Turbie Technology: Focus for the Future; Reno-Tahoe, NV; United States; 6 June 2005 through 9 June 2005

QC 20120305

Available from: 2012-02-08 Created: 2012-02-08 Last updated: 2014-12-01Bibliographically approved

Open Access in DiVA

No full text

Other links

Publisher's full textScopus

Search in DiVA

By author/editor
Vogt, DamianFransson, Torsten
By organisation
Heat and Power Technology
Energy Engineering

Search outside of DiVA

GoogleGoogle Scholar
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

Altmetric score

Total: 47 hits
ReferencesLink to record
Permanent link

Direct link