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Old   October 20, 2003, 07:58
Default Thermo-acoustics
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Pr
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Somebody working in the field of thermo-acoustics? Pr
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Old   October 20, 2003, 08:02
Default Re: Thermo-acoustics
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Pete
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we have worked on pulse tubes?
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Old   October 20, 2003, 08:14
Default Re: Thermo-acoustics
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Pr
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Can you elaborate on that pulse tubes.? Pr
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Old   October 21, 2003, 04:44
Default Re: Thermo-acoustics
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Pete
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Essentially it is a thermoacoustic engine that provides pulsating flow down a tube to provide cooling. Similar to a reverse stirling cycle without the moving parts
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Old   October 21, 2003, 04:56
Default Re: Thermo-acoustics
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Pete
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Oscillating pressures inside a tube closed at one end will cause the gas to be heated at the closed end during compression and cooled at the other end during expansion. Basic refrigeration cycle
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Old   October 21, 2003, 05:02
Default Re: Thermo-acoustics
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Pratap
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Okay thanks. But I was referring to self excited oscillations produced from therm-acoutics coupling in gas turbine combustor. Which is a problem of concern nowadays in the disgn of Low Nox gas turbine combustor.
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Old   October 21, 2003, 09:07
Default Re: Thermo-acoustics
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Jim Park
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Does this mean that

Pr = Pratap ?

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Old   October 21, 2003, 09:21
Default Re: Thermo-acoustics
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Pr
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Yeah
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Old   October 24, 2003, 10:49
Default Re: Thermo-acoustics
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Dimitri Nicolopoulos
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Clients of us have been working with RADIOSS-CFD to produce some thermal acoustic flow in a gaz turbine.

I can provide the published paper by e-mail if needed. 'Numerical Analysis of acoustic-flow interaction in a gas turbine combustion chamber' Dariusz Nowak ALSTOM

Dimitri Nicolopoulos dimitri@mcube.fr www.mcube.fr
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