Numerical Investigation of Heat Transfer Enhancement with Mist Injection

Abstract:

In the present work, computational simulations was made using ANSYS CFX to predict the improvements of internal heat transfer in rectangular ribbed channel using different coolants. Several coolants such as air, steam, air/mist and steam/mist were investigated. The shear stress transport (SST) turbulence model is selected by comparing the predictions of different turbulence models with experimental results. The results indicate that the heat transfer coefficients enhance in ribbed channel at injection small amount of mist. The heat transfer coefficients of air/mist, steam and steam/mist increase by 1.13, 1.57 and 2.07 times than that of air, respectively. Furthermore, comparing with droplets size, the proper size is from 6 to 10 µm. which had the best enhancement performance in ribbed duct.

• Periodical: Applied Mechanics and Materials (Volume 281)
• Pages: 250-253
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.281.250
• Online since: January 2013
• Authors: Fifi N.M. Elwekeel, Antar M.M. Abdala, Qun Zheng
• Keywords: Air, Heat Transfer, Mist, Steam

References

[1] A. Kashmiri, M. A. Cotton, and Y. Addad in: Numerical Simulations of Flow and heat transfer over Rib-Roughened Surfaces, 17th Annual Conference of CFD Society of Canada, Ottawa, May 3-5(2009).

[2] A. Ooi, G. Iaccarino, P. A. Durbin, and M. Behnia in: Reynolds Averaged Simulation of Flow and Heat Transfer in Ribbed Ducts, Int. J. Heat Fluid Flow, Vol. 23(2002), pp.750-757.

DOI: 10.1016/s0142-727x(02)00188-1

[3] M. E. Taslim and H. Liu in: A Combined Numerical and Experimental Study of Heat Transfer in Roughened Square Channel with 45o Ribs, Int. J. Rotating Mach., Vol. 1(2005), pp.60-66.

DOI: 10.1155/ijrm.2005.60

[4] A. Haasenritter, M. Amro, and B. Weigand in: an Experimental and Numerical Study of the Transfer Performance of Sharp- Edged and Rounded Ribs in Square Ducts, The 9th International Symposium on Transport Phenomena and Dynamics of Rotating Machinery, Honolulu, Hawaii, February 10-14(2002).

[5] L. Shui, J. Gao, L. Xu and X. Wang in: Numerical Investigation of Heat Transfer and Flow Characteristics in a Steam- Cooled Square ribbed Duct, ASME paper GT2010-22407(2010).

DOI: 10.1115/gt2010-22407

[6] F. P. Oisin, Lyons, Tim, Persoons, Gerard, Byrne, B. Darina and Murray in: Water Mist/ Air Jet Cooling of a Heated Plate with Variable Droplet Size, ThETA 2, Cairo, Egypt, Dec. 17-20th (2008).

DOI: 10.1109/theta.2008.5167178

[7] S. Sikalo, N. Delalic, and E. N. Ganic in: Hydrodynamics and Heat Transfer Investigation of Air- Water Dispersed Flow, Exp. Therm Fluid Sci., Vol. 25(2002), pp.511-521.

DOI: 10.1615/ichmt.2000.thersieprocvol2thersieprocvol1.470

[8] T. Guo, T. Wang and J. L. Gaddis in: Mist/Steam Cooling in Heated Horizontal Tube- Part 2: Results and Modeling, ASME J. Turbomachinary, Vol. 122 (2000), pp.366-374.

DOI: 10.1115/1.555451

[9] T. S. Dhanasekaran, and T. Wang in: Validation of Mist/ Steam Cooling CFD Model in a Horizontal Tube, ASME paper HT2008-56280, Summer Heat Transfer Conference, Jacksonville, Florida, August 10-14( 2008).

DOI: 10.1115/ht2008-56280

[10] G. Tanda in: Heat Transfer in Rectangular Channels with Transverse and V- Shape Broken Ribs, Int. J. Heat Mass Transfer, Vol. 47(2004), pp.229-243.

DOI: 10.1016/s0017-9310(03)00414-9

[11] X. Li and T. Wang in: Simulation of Film Cooling Enhancement with Mist Injection, " ASME paper GT2005-69100(2005).