Heat and Mass Transfer Characteristics Around Slip Single Coal Particle in Flue Gas in High Intensity Sound Field

doi:10.19596/j.cnki.1001-246x.7656

CHINESE JOURNAL OF COMPUTATIONAL PHYSICS ›› 2018, Vol. 35 ›› Issue (3): 303-312.DOI: 10.19596/j.cnki.1001-246x.7656

Previous Articles Next Articles

Heat and Mass Transfer Characteristics Around Slip Single Coal Particle in Flue Gas in High Intensity Sound Field

XU Weilong^1,2, JIANG Genshan², AN Liansuo¹, LIU Yuechao^1,2

1. School of Energy Power and Mechanical Engineering, North China Electric Power University, Beijing 102206, China;
2. School of Mathematics and Physics, North China Electric Power University, Baoding 071003, Hebei Province, China

Received:2017-03-13 Revised:2017-07-18 Online:2018-05-25 Published:2018-05-25

Abstract

Abstract: To study heat and mass transfer around pulverized coal particle under high intensity acoustic field with superposed steady component, two-dimensional, unsteady, laminar conservation equations for mass, momentum and energy transport in flue gas phase of power plant boiler were developed. Local Nusselt, space-averaged Nusselt and space- and time-averaged Nusselt numbers around coal particles, as functions of sound pressure level, frequency and ratio of acoustic velocity to steady slip velocity between particles and main flow, were discussed. There exists extremum frequency in which heat and mass transfer effect is the best in the range of audible sound frequency. It highlights a good application prospect in combustion for boiler.

Key words: high intensity sound, local Nusselt number, space-averaged Nusselt number, space- and time-averaged Nusselt number, steady slip velocity

CLC Number:

TK224.1

XU Weilong, JIANG Genshan, AN Liansuo, LIU Yuechao. Heat and Mass Transfer Characteristics Around Slip Single Coal Particle in Flue Gas in High Intensity Sound Field[J]. CHINESE JOURNAL OF COMPUTATIONAL PHYSICS, 2018, 35(3): 303-312.

References

[1] YU Junwei, HE Rong, ZHANG Yanguo. Heat transfer characteristics of a fractal particle in a low Reynolds number flow[J]. J Tsinghua Univ (Sci & Technol), 2014, 54(06):781-786,798.
[2] JIANG Genshan, ZHENG Yinchao, PAN Jie, et al. The enhancement of pulverized-coal combustion by using sound waves[J]. The Journal of the Acoustical Society of America, 2012, 131(4):3468-3468.
[3] WANG Yingzhou, HAN Pu. Research on boiler combustion enhancement by sound field[J]. Journal of Chinese Society of Power Engineering, 2014, 34(04):271-247.
[4] KIANI H, SUN D W, ZHANG Z. The effect of ultrasound irradiation on the convective heat transfer rate during immersion cooling of a stationary sphere[J]. Ultrason Sonochem, 2012, 19(6):1238-1245.
[5] KIANI H, SUN D W, ZHANG Z. Effects of processing parameters on the convective heat transfer rate during ultrasound assisted low temperature immersion treatment of a stationary sphere[J]. Journal of Food Engineering, 2013, 115(3):384-390.
[6] DHANALAKSHMI N P, NAGARAJAN R, SIVAGAMINATHAN N, et al. Acoustic enhancement of heat transfer in furnace tubes[J]. Chemical Engineering and Processing:Process Intensification, 2012, 59:36-42.
[7] HA M Y, KIM S M. Combustion of a single droplet in the presence of an oscillating flow[J]. KSME Journal, 1995, 9:209-224.
[8] MARTHELLI R C, BOELTER L M. The effect of vibration on heat transfer by free convection from a horizontal cylinder[J]. Proc 5th International Congress of Applied Mechanics, 1939:578-584.
[9] BAXI C B, RAMACHANDRAN A. Effect of vibration on heat transfer from spheres, Trans[J]. ASME J Heat Transfer, 1969:337-344.
[10] RANZ W E, MARSHALL W R. Evaporation from drops, Part I and Part Ⅱ[J]. Chemical Engineering Progress, 1952, 48(3):141-146, 173-180.
[11] LASEN P S, JENSE J W. Evaporation rates of drops in forced convection with superposed transverse sound field[J]. Int J Heat Mass Transfer, 1978, 21:511-517.
[12] SAYEGH N N, GAUVIN G D. Numerical analysis of variable property heat transfer to a single sphere in high temperature surroundings[J]. Aiche Journal, 1979, 25(3):522-534.
[13] HA M Y, YAVUKURT S. A theoretical investigation of acoustic enhancement of heat and mass transfer-Ⅱ. Oscillating flow with a steady velocity component[J]. International Journal of Heat Mass Transfer, 1993, 36(8):2193-2202.
[14] HA M Y, YAVUKURT S, KIM K C. Heat transfer past particles entrained in an oscillating flow with and without a steady velocity[J]. International Journal Heat Mass Transfer, 1993, 36(4):949-959.
[15] ALASSAR R S, BADR H M. Oscillating viscous flow over a sphere[J]. Computers & Fluids, 1997, 26(7):661-682.
[16] HE Yaling, YANG Weiwei, ZHAO Chunfeng, et al. Numerical study of enhancing heat transfer by pulsating flow[J]. Journal of Engineering Thermophysics, 2005, 26(3):495-497.
[17] VALVERDE J M. Acoustic streaming in gas-fluidized beds of small particles[J]. Soft Matter, 2013, 9(37):8792-8814.
[18] JIANG Genshan, XU Weilong, LIU Yuechao, et al. A numerical study on the oscillating flow induced by an acoustic field around coal particles[J]. Journal of Combustion, 2016, 2016(13).
[19] XU Weilong, JIANG Genshan, AN Liansuo, et al. Oscillating flow characteristics around coal particle in high intensity sound field[J]. Chinese Journal of Computational Physics, 2017, 34(4):425-436.

Heat and Mass Transfer Characteristics Around Slip Single Coal Particle in Flue Gas in High Intensity Sound Field

RichHTML

PDF

Knowledge

Abstract

Cite this article

share this article

References

Related Articles 1

Recommended Articles

Metrics

Authors

Reviewers

Journal Online

About Journal