Abstract
A model for the enhancement of coal combustion in the presence of high intensity acoustics has been developed. A high intensity acoustic field induces an oscillating velocity over pulverized coal particles otherwise entrained in the main gas stream, resulting in increased heat and mass transfer. The augmented heat and mass transfer coefficients, expressed as space- and time-averaged Nusselt and Sherwood numbers for the oscillating flow, were implemented in an existing computer code (PCGC-2) capable of predicting various aspects of pulverized coal combustion and gasification. Increases in the Nusselt and Sherwood numbers of about 45, 60 and 82.5% at sound pressure levels of 160, 165 and 170 dB for 100 μm coal particles were obtained due to increases in the acoustic slip velocity associated with the increased sound pressure levels.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 439-446 |
| Number of pages | 8 |
| Journal | American Society of Mechanical Engineers, Heat Transfer Division, (Publication) HTD |
| Volume | 106 |
| State | Published - Dec 1 1989 |
| Event | Heat Transfer Phenomena in Radiation, Combustion, and Fires - Philadelphia, PA, USA Duration: Aug 6 1989 → Aug 9 1989 |
All Science Journal Classification (ASJC) codes
- Mechanical Engineering
- Fluid Flow and Transfer Processes