Tl. Hoffmann et al., EXPERIMENTAL AND NUMERICAL-ANALYSIS OF BIMODAL ACOUSTIC AGGLOMERATION, Journal of vibration and acoustics, 115(3), 1993, pp. 232-240
The interaction between fly ash particles (first mode) and sorbent par
ticles (second mode) in coal combustion processes is studied under the
influence of a low frequency, high intensity acoustic field. The effe
ct of bimodal acoustic agglomeration is evaluated in a numerical sensi
tivity analysis on parameters such as residence time in the combustion
chamber and mass loading of the particle modes. An Acoustic Agglomera
tion Simulation Model (AASM) developed by Song at the Pennsylvania Sta
te University is used for these numerical studies. Experimental examin
ations carried out in a down-fired combustor show evidence of bimodal
agglomeration and enhanced particle interaction under the influence of
a low frequency (44 Hz), high intensity (160 dB) sound field. The res
ults of the experiments are compared to the equivalent numerical studi
es and good agreement can be shown between the two sets of data.