Zurich Universities of Applied Sciences and Art www.zhaw.ch

15th Blade Mechanics Seminar

Wednesday, September 1, 2010 8:30 – 17:30 h, Winterthur (Switzerland)Zurich University of Applied Sciences

In co-operation with

Aim/Keynote

Goals and Motivation The Zurich University of Applied Sciences (ZHAW) Winterthur hosted the 14th Blade Me-chanics Seminar, in cooperation with ASME Europe, on September 2, 2009 for the first time.

The successful and well attended seminar last year strengthened the motivation to orga-nize also the following conference, which will take place on September 1, 2010. It will be held in a similar theoretical and practical framework with a variety of interesting topics.

At this year seminar, Dr. Ronnie Bladh, Specialist Blade Dynamics - Aeromechanics at Sie-mens Industrial Turbomachinery AB, Finspong, Sweden will give the keynote presentation on: „The Aeromechanical Challenges in Industrial Turbomachines“

The unchanged key target is to offer a platform for know-how and experience exchange among engineers from various turbomachinery companies. The Blade Mechanics Seminar aims to answer the participant‘s needs coming from their daily work on axial and radial bladed discs of aero- and heavy-duty engines. All presentations will be given in common engineering terms by using comprehensible mathematics. Keynote presentation

Dr. Ronnnie Bladh, Specialist Blade Dynamics - Aeromechanics at Sie-mens Industrial Turbomachinery AB, Finspong, Sweden

„The Aeromechanical Challenges in Industrial Turbomachines“

High cycle fatigue continues to be a key challenge in the design of turbomachinery bla-ding. The associated technical challenges facing the turbomachinery industry are to a large extent due to common development drivers for aero engines, mechanical drive, and power-generating units, such as aerodynamic efficiency, robustness and cost. Important distinctions are the constant chase for mass reduction in aero engines versus long-term integrity in harsh chemical environments for landbased engines. In both cases, however, modern blade design tends towards thinner, longer, and fewer highly loaded blades from the cheapest material possible, and it is left to lifing engineers to bring safely ashore the “sinking ships” that ambitious aerodynamicists and purchasers left behind.

In this talk, the principal sources of blade excitation are discussed: synchronous excitation from asymmetries and rotor-stator interaction, and non-synchronous phenomena such as rotating stall and flutter. Traditionally, resistance against these excitation mechanisms has been ensured through small incremental and thus conservative blade design upgrades in combination with an extensive experience base. Today, modern blade designs are brea-king historical technical barriers, which render this traditional approach invalid. To over-come this challenge and to understand the physics of appearing blade vibratory behavior, modern numerical tools for mistuned response and flutter predictions and tip-timing mea-surement technology have taken on an important role over time. Example applications of these emerging tools to industrial turbomachinery blades are provided. Particular attention is given to mistuning effects, whose understanding and accurate capture are pivotal for robust requirements on forced response margins and aeroelastic stability.

Programme

Welcome coffee and croissants

Welcome address

Session 1 – Blade Life Design

Keynote presentation: The Aeromechanical Challenges in Industrial Turboma-chines

Numerical Tool for the Prediction of Aeromechanical Phenomena in Gas Turbines

Coffee

Session 2 – Blade Lifetime Prediction

Influence of Blade Count Ratio on the Force Distributi-on and Blade Modal Properties

Predicting the Integrity and Life of HP Turbine Nozzle Guide Vanes

Fast Resonance Passage Computation of Blades and Vanes

Lunch

Session 3 – Experimental Blade Analysis

New Evaluation Procedure for Centrifugal Compressor Impeller Blade Vibration Measurements

Determination of Blade-Alone Frequencies of a Blisk for Mistuning Analysis Based on Optical Measurements

Blade Crack Detection by Tip Timing Measurements During High Cycle Fatigue Tests

Coffee

Session 4 - HCF Mitigation

Effects of Blade Mistuning on Frequency Veering Regi-ons of Real HPC Blisks

Comparison between Two-Way and One-Way Coupling Tools

Use of Constrained Modes for Nonlinear Analysis of Shrouded Blade Rings

A Direct Method for the Forced Response Calculation of Bladed Disks with Friction

Seminar end

Jürg Meier, Jaroslaw Szwedowicz

Ronnie Bladh, Siemens Industrial Turbo-machinery AB, Sweden

María Mayorca, Royal Institute of Techno-logy, Sweden

Florian Fruth, Royal Institute of Technolo-gy, Sweden

Richard Setchfield, Rolls-Royce Groups plc, UK

Andreas Hartung, MTU Aero Engines, Germany

Frank May, Sulzer Innotec, Switzerland

Michael Zielinski, MTU Aero Engines, Germany

Bernhard Klein, ABB Turbo Systems, Switzerland

Ulrik Strehlau, BTU Cottbus, Germany

Tie Chen, ALSTOM Power, UK

Jürg Meier, Zurich University of Applied Sciences, Switzerland

Christian Firrone, Politecnico di Torino, Italy

Jürg Meier

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General information

Winterthur

Departement Gesundheit G

Departement Angewandte Linguistik L

School of Management W

Adressen auf der Rückseite

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St. Georgenstrasse

BUS

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SulzbergstrasseWülflingerstrasse St. Georgenplatz

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affh

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Kreuzstrasse

Museumstrasse

MerkurstrasseBankstrasse

Stadthausstrasse Kasinostr.

MetzgergasseUntertor

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hofs

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Lindstrasse

SP

SF

SI

SM

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Liebestrasse

Sträulistrasse

Stadthausstrasse

SBB

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Winterthur, St. Georgenplatz

SB, SC, SF, SI Departement GesundheitSK Zentrum für Strategisches Management (SOM)SM Departement Angewandte LinguistikSP WIG, IVM (SOM)ST Zentrum für Marketing Management (SOM)W School of Management

Conference venueZHAW Zurich University of Applied SciencesLecture hall, SM 01.01, Theaterstr. 15c, 8401 Winterthur The conference venue is situated at a walking distance of 300m from the station.The trains run as often as every 15 to 20 minutes from Zurich Airport and take about 15 minutes to arrive in Winterthur.

Costs and Closing date The participation fee amounts to CHF 180 for registrations until August 13, 2010 or CHF 210 for registrations after this date. This payment includes also documents (proceedings on CD) and meals.

Registration Please registrate online at: www.imes.zhaw.ch/blade-mechanics-seminar

Hotel informationFor special hotel rates for participants at the Blade Mechanics Seminar please see: www.imes.zhaw.ch/blade-mechanics-seminar

Organizer University of Applied Sciences (ZHAW) in Winterthur, in co-operation with the Swiss Section of ASME

Prof. Dr. Jürg Meier Dr. Jaroslaw Szwedowicz Nicole Schuwey, Seminar Head of Institute of Member of the Board Office, Institute ofMechanical Systems Swiss Section of ASME Mechanical Systems

ZHAW Zurich University ALSTOM (Switzerland) ZHAW Zurich University of Applied Sciences of Applied Sciences

+41 (0) 58 934 72 27 +41 (0) 56 205 48 80 +41 (0) 58 934 67 95mrjg@zhaw.ch jaroslaw.szwedowicz@ seyo@zhaw.ch power.alstom.com

Further information/Abstracts For abstracts of the presentations and further information please contact our webpage: www.imes.zhaw.ch/blade-mechanics-seminar