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TOTeM 19: Combustion Oscillations and Hum - Problems and Opportunities
Noise generation is a consequence of most combustion processes (see:
Combustion File at http://www.handbook.ifrf.net/handbook/cf.html?id=176). At low levels, it can give raise to complaints from employees or neighbours. At higher levels, there may be difficulties in working safely in a noisy environment, or even a risk of hearing damage.
An extreme form of combustion noise occurs when there is a positive coupling between the flame and the acoustics of the combustion system or some flow instabilities in the fuel or air supplies. These create combustion driven oscillations, also known as resonance or hum. Although combustion driven oscillations are relatively infrequent, when they do occur, they may cause extreme forms of work place/neighbourhood problems or even lead to risks of structural damage or combustion instability/flame failure. Noise from low frequency combustion oscillations (often at infrasound frequencies) travels long distances with little attenuation.
Totem 19 aims to present an overview of current problems and activities in the field of combustion noise in industrial plant and gas turbines – particularly combustion oscillations, dealing with topics such as:
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Sources and mechanisms
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Measurement and analysis
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Modelling unsteady combustion systems
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Noise suppression (Passive or Active)
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Practical examples of solutions to problems
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Pulsed combustion for process enhancement
The TOTeM will include several invited overview papers and an interactive poster session. The objective of TOTeM 19 is to:
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Inform participants of current status of our understanding
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Establish IFRF members needs and preoccupations
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Establish what additional guidance on noise that might be included in the IFRF On-line Combustion Handbook
There will be a natural bridge to the linked TOTeM 20 in the area of CFD based unsteady combustion modelling.
TOTeM 19 – Programme Status – 8th May 2002
Combustion Oscillations and Hum
Problems and Opportunities
9:00 – 09.10
Welcome to the Akersloot TOTeM Cluster
Peter Roberts
09.10 – 09.30
Objectives of the TOTeM
Neil Fricker – Avalon Services
9:30 – 10.15 Presentation 1 - Keynote:
A review of transient behaviour and periodic heat release sources in turbulent flames interacting acoustically with the combustion installation
Keynote Speaker: Professor Wolfgang Leuckel - University of Karlsruhe
10.15 - 10:45 Presentation 2:
A power industry view of gas turbine hum and acoustical modelling techniques.
Presented by Johan Vanormelingen – Laborelec - and Professor Eric Vandenbulk -University of Leuven.
10.45 – 11.15 Refreshment Break
11.15 – 11.45 Presentation 3
Combustion noise - measurement and trouble shooting techniques to face current noise regulations
Presented by Rene Parchen - TNO
11.45 - 12.15 Presentation 4:
Acoustic Instabilities in Syngas Fired Combustion Chambers
Presented by Jim Kok - University of Twente
12.15 - 12.45 Presentation 5:
Gas Turbine Acoustics'
Presented by Chris Wilson – QinetiQ
12.45 - 13.15 Presentation 6:
'The use of CFD to simulate and investigate oscillating combustion systems'
Eugenio Giacomazzi and Stefano Giammartini
Presented by Eugenio Giacomazzi
13.15 Poster Session including Buffet Lunch
15:30 - 17:00 Forum - Discussion session
17:00 - 17:30 Conclusion and closing
Announcement
TOTeMs location
TOTeMs Registration, Fee and payment
Poster session - Call for presentations
Programmes, TOTeM19,
TOTeM20
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