Model of the enhancement of coal combustion using high intensity acoustic fields

Savas Yavuzkurt, M. Y. Ha, G. H. Koopmann, A. Scaroni

Research output: Contribution to journalConference article

7 Citations (Scopus)

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 languageEnglish (US)
Pages (from-to)439-446
Number of pages8
JournalAmerican Society of Mechanical Engineers, Heat Transfer Division, (Publication) HTD
Volume106
StatePublished - Dec 1 1989

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Coal
Coal combustion
Acoustic fields
Mass transfer
Acoustic waves
Oscillating flow
Acoustic intensity
Coal gasification
Heat transfer coefficients
Gases
Acoustics
Heat transfer

All Science Journal Classification (ASJC) codes

  • Mechanical Engineering
  • Fluid Flow and Transfer Processes

Cite this

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title = "Model of the enhancement of coal combustion using high intensity acoustic fields",
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.",
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Model of the enhancement of coal combustion using high intensity acoustic fields. / Yavuzkurt, Savas; Ha, M. Y.; Koopmann, G. H.; Scaroni, A.

In: American Society of Mechanical Engineers, Heat Transfer Division, (Publication) HTD, Vol. 106, 01.12.1989, p. 439-446.

Research output: Contribution to journalConference article

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T1 - Model of the enhancement of coal combustion using high intensity acoustic fields

AU - Yavuzkurt, Savas

AU - Ha, M. Y.

AU - Koopmann, G. H.

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