Experimental Investigation of The Influence of Mechanical Forced Vibrations and Heat Flux on Coefficient of Heat Transfer
DOI:
https://doi.org/10.25271/sjuoz.2018.6.3.519Keywords:
Frequency of Vibration, Amplitude, Non-Dimensional Coefficient of Heat Transfer, Reynolds NumberAbstract
The aim of this paper to verify the influence of vertical forced vibration on the coefficient of heat transfer of the laminar internal flow in a spiral fluted tube. With adopted the water as a working fluid, and flowing Reynolds numbers at the entrance between 228 and 1923, the tube heated under constant heat flux levels ranging from 618-3775 W/m2. The frequencies of vibration ranging from 13 to 30 Hz, and the amplitudes of vibration from 0.001 to 0.002 mm. The results appeared that the coefficient of heat transfer significantly affected by mechanical forced vibration in a flowing of the heated tube. When the vibration amplitude increases, the Nusselt number Significantly increases, with the maximum increases of 8.4% at the amplitude of vibration 0.0022 mm and the frequency 13 Hz. Generally, the coefficient of heat transfer increases with increasing Reynolds number and heat flux. At last, by using the parameters of vibration amplitude, frequency, heat flux and Reynolds number, a new correlation has been derived depends on experimental data.
References
[2] W. M. Rohsenow, J. P. Hartnett, and Y. I. Cho, Handbook of heat transfer vol. 3: McGraw-Hill New York, 1998.
[3] L. Bronfenbrener, L. Grinis, and E. Korin, "Experimental study of heat transfer intensification under vibration condition," Chemical Engineering & Technology: Industrial Chemistry‐Plant Equipment‐Process Engineering‐Biotechnology, vol. 24, pp. 367-371, 2001.
[4] Y. H. Lee, D. H. Kim, and S. H. Chang, "An experimental investigation on the critical heat flux enhancement by mechanical vibration in vertical round tube," Nuclear engineering and design, vol. 229, pp. 47-58, 2004.
[5] D. H. Kim, Y. H. Lee, and S. H. Chang, "Effects of mechanical vibration on critical heat flux in vertical annulus tube," Nuclear Engineering and Design, vol. 237, pp. 982-987, 2007.
[6] E. Eid and M. Gomaa, "Influence of vibration in enhancement of heat transfer rates from thin plannar fins," Heat and mass transfer, vol. 45, pp. 713-726, 2009.
[7] A. Alaei, M. H. Kafshgari, and H. Atashi, "A new designed heat pipe: an experimental study of the thermal performance in the presence of low-frequency vibrations," Heat and Mass Transfer, vol. 48, pp. 719-723, 2012.
[8] A. Sathyabhama and S. Prashanth, "Enhancement of boiling heat transfer using surface vibration," Heat Transfer—Asian Research, vol. 46, pp. 49-60, 2017.
[9] A. Hosseinian and A. M. Isfahani, "Experimental study of heat transfer enhancement due to the surface vibrations in a flexible double pipe heat exchanger," Heat and Mass Transfer, vol. 54, pp. 1113-1120, 2018.
[10] W. Liu, Z. Yang, B. Zhang, and P. Lv, "Experimental study on the effects of mechanical vibration on the heat transfer characteristics of tubular laminar flow," International Journal of Heat and Mass Transfer, vol. 115, pp. 169-179, 2017.
[11] A. Hosseinian, A. M. Isfahani, and E. Shirani, "Experimental investigation of surface vibration effects on increasing the stability and heat transfer coeffcient of MWCNTs-water nanofluid in a flexible double pipe heat exchanger," Experimental Thermal and Fluid Science, vol. 90, pp. 275-285, 2018.
[12] P. Rousseau, M. Van Eldik, and G. Greyvenstein, "Detailed simulation of fluted tube water heating condensers," International Journal of Refrigeration, vol. 26, pp. 232-239, 2003.
[13] E. W. Lemmon, M. L. Huber, and M. O. McLinden, "NIST reference fluid thermodynamic and transport properties—REFPROP," NIST standard reference database, vol. 23, p. v7, 2002.
[14] E. N. Sieder and G. E. Tate, "Heat transfer and pressure drop of liquids in tubes," Industrial & Engineering Chemistry, vol. 28, pp. 1429-1435, 1936.
[15] A. Bejan, Convection heat transfer: John wiley & sons, 2013
Downloads
Published
How to Cite
Issue
Section
License
Authors who publish with this journal agree to the following terms:
- Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a Creative Commons Attribution License [CC BY-NC-SA 4.0] that allows others to share the work with an acknowledgment of the work's authorship and initial publication in this journal.
- Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work, with an acknowledgment of its initial publication in this journal.
- Authors are permitted and encouraged to post their work online.