Write your message
Volume 17, Issue 33 (5-2021)                   marine-engineering 2021, 17(33): 65-75 | Back to browse issues page

XML Persian Abstract Print


Download citation:
BibTeX | RIS | EndNote | Medlars | ProCite | Reference Manager | RefWorks
Send citation to:

Yari E, Nateghi M R. Increasing heat transfer rate in heat exchanger of underwater vehicle motor by increasing fluid flow turbulence. marine-engineering. 2021; 17 (33) :65-75
URL: http://marine-eng.ir/article-1-820-en.html
1- Department of mechanical engineering, Maleke-Ashtar University of technology
Abstract:   (690 Views)
Due to limited space and energy, increasing the performance of the underwater marine vehicle motor is one of the most important parameters in the design process. Increasing the performance of the underwater marine vehicle motor is directly related to increasing the efficiency of its cooling heat exchanger. In this paper, the aim is to use the geometric changes of the fins and increase the contact surface between the heat exchanger and the passing fluid in order to increase the turbulence of the flow to increase the efficiency of the heat exchanger. The existing experimental heat transfer relations have been used to validate the numerical solution method. Ansys fluent software has been used for numerical simulation. In this simulation, the pressure-based solver is used to solve the Navier Stokes equations along with the RNG k-ε turbulent model, and the solution is intended steady with air as working fluid. The effect of fluid flow velocity on circular fines at three different velocities has been investigated and then the effect of geometric changes of teeth has been evaluated in the speed of 3.0428 m / s. In the case of circular fins, the increase of fluid velocity increases heat transfer, and in the case of toothed fin, increasing the height of the teeth causes a slight increase in heat transfer and pressure drop, but as the number of teeth increases, the Nusselt number and pressure drop decrease significantly.
Full-Text [PDF 3260 kb]   (411 Downloads)    
Type of Study: Research Paper | Subject: Main Engine & Electrical Equipments
Received: 2020/08/8 | Accepted: 2021/03/16

References
1. Rabas, T. J., and Taborek, J., (1987), Survey of Turbulent Forced-Convection Heat Transfer and Pressure Drop Characteristics of Low-Finned Tube Banks in Cross Flow, Heat Transfer Engineering, Vol. 8, No. 2, pp. 49-62. [DOI:10.1080/01457638708962793]
2. Neal, S. B H. C., and Hitchcock, J. A., (1966), A Study of the Heat Transfer Process in Banks of Finned Tube in Cross Flow, Using a Large Scale Model Technique, Proceeding of the Third International Heat Transfer Conference, Vol. 3, Chicago, IL, pp. 290-298.
3. Mirkovic, Z., (1974), Heat Transfer and Flow Resistance Correlation for Helically Finned and Staggered Tube Banks in Cross Flow, Heat Exchangers: Design and Theory Source Book, (edited by N. H. Afgan and E. U. Schlünder), Hemisphere, Washington, D.C, pp. 559-584.
4. Jameson, S. L., (1945), Tube Spacing in Finned Tube Banks, ASME Transactions, Vol. 67, pp. 633-642.
5. Antuf'ev, V. M., and Gusev, E. K., (1968), Intensification of Heat Transfer of Cross-Flow Finned Surfaces, Teploenergetika, Vol. 15, No. 7, pp. 31-34.
6. Ward, D. J., and Young, E. H., (1959), Heat Transfer and Pressure Drop of Air in Forced Convection across Triangular Pitch Banks of Finned Tubes, Chemical Engineering Progress Symposium Series, Vol. 55, No. 29, pp.37-44.
7. Briggs, D. E., and Young, E. H., (1963), Convection Heat Transfer and Pressure Drop of Air Flowing Across Triangular Pitch Banks of Finned Tubes, Chemical
8. Engineering Progress Symposium Series, No. 41, Vol. 59, pp. 1-10.
9. Torii K., Kwak K. M., and Nishino K., (2002), Heat transfer enhancement accompanying pressure-loss reduction with winglet-type vortex generators for fin-tube heat exchangers, International Journal of Heat and Mass Transfer, Vol 45 Issue 18 pp. 3795-3801. [DOI:10.1016/S0017-9310(02)00080-7]
10. Li-zhi Zhang, Zuo-yi Chen., (2011), Convective heat transfer in cross-corrugated triangular ducts under uniform heat flux boundary conditions, International Journal of Heat and Mass Transfer, Volume 54, Issues 1-3, pp. 597-605. doi. org/10. 1016/ j. ijheatmasstransfer. 2010.09.010. [DOI:10.1016/j.ijheatmasstransfer.2010.09.010]
11. Carija, Z, Frankovic, B, Percic, M, Cavrak, M, (2014), Heat transfer analysis of fin-and-tube heat exchangers with flat and louvered fin geometries International Journal of Refrigeration Vol 45 pp.160-P167. [DOI:10.1016/j.ijrefrig.2014.05.026]
12. M. Tusar, K. Ahmed, M. Bhuiya, P. Bhowmik, M. Rasul, N. Ashwath, (2019), CFD study of heat transfer enhancement and fluid flow characteristics of laminar flow through tube with helical screw tape insert, Energy Procedia. 160. 699-706. doi: 10.1016/j.egypro.2019.02.190. [DOI:10.1016/j.egypro.2019.02.190]
13. Abeykoon, C., (2020), Compact heat exchangers - Design and optimization with CFD, International Journal of Heat and Mass Transfer. Volume 146(2020). Doi. org/10. 1016/j. ijheatmasstransfer. 2019. 118766. [DOI:10.1016/j.ijheatmasstransfer.2019.118766]

Send email to the article author


Rights and permissions
Creative Commons License This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.

Creative Commons License
International Journal of Maritime Technology is licensed under a

Creative Commons Attribution-NonCommercial 4.0 International License.