.... Editor: Joseph Zelina. Numerical investigation of the fluid-structure interaction between the combusting flow inside the combustion chamber, acoustics induced by the flame fluctuations, and liner walls vibrations has been performed. Three different geometries were analyzed numerically in order...

... the axial modes has proven to be insufficient for the assessment of the thermoacoustic stability. An adequate analysis requires consideration of the circumferential acoustic coupling generated by the acoustic field in the upstream and downstream annuli and the open passages between the cans, respectively...

... to be predicted. Especially, information about the thermoacoustic behavior and the emissions is very important. As the thermoacoustics strongly depend on the acoustic boundary conditions of the system, it is obvious that test rig conditions should match or be close to those of the full-scale engine...

...Z. M. Ibrahim; F. A. Williams; S. G. Buckley; C. Z. Twardochleb For given acoustic frequencies of premixed gas-turbine combustors, a classical method not currently in use is explored for assessing whether acoustically driven oscillatory combustion will occur. The method involves cataloging linear...

... experimentally, a test setup has been built consisting of a single burner, 500 kW , 5 bar combustion system. The thin structure (liner) is contained in a thick pressure vessel with optical access for a traversing laser vibrometer system to measure the vibration levels of the liner. The acoustic excitation...