Thermal Analysis for Diesel Engine Exhaust Manifold with Regard to the Boiling Phenomenon and Compared with Experimental Results

Document Type : Research Article

Authors

Department of Mechanical Engineering, Jondi Shapour University, Dezful, Iran

Abstract

Exhaust manifold with the cooling system is widely used in diesel engines which use turbocharger. The Appropriate solution to check how fluid passing through the manifold, is using the computational fluid dynamics laws. According to this, after 3D modeling of the manifold’s body and make the appropriate meshing, using multiphase flows laws and Rensselaer Polytechnic Institute separation method for sub-cooled boiling at low pressure, the effects of fluid flow within the manifold have been simulated. In order to validate the method used for boiling, matching the results with the experimental results is performed. The information in this study includes the distribution of temperature, pressure, flow through the interior geometry and amount of vapor volume fraction that is created in the manifold. The results showed that in the inlet and outlet of manifold, there is a high temperature focus and consideration of boiling phenomenon instead of single-phase flow assumption, reduced the maximum temperature of these areas. The pressure which is applied to Manifold is caused by the combustion gases and the pressure of the cooling fluid is negligible in comparison with that. By analyzing the result, two critical areas of temperature focus were introduced and adaptation of cracks in the original sample with one of these areas, is indicating the accuracy and quality of the obtained results.

Keywords

Main Subjects

References

[1] K.K. Katta, Phase change cooling applications: Engine cooling, The University of Texas at El Paso, 2008.
[2] R. Hemmat Khanlou, A. Mohammadi, S. Jazayeri, M.J.T.J.o.E.R. Yaghoubi, Simulation of heat transfer considering boiling phenomenon in cooling passage of turbo-charged national engine, 29(29) (2013) 3-14.
[3] A.K. Sadaghiani, A.J.I.J.o.T.S. Koşar, Numerical investigations on the effect of fin shape and surface roughness on hydrothermal characteristics of slip flows in microchannels with pin fins, 124 (2018) 375-386.
[4] H.-T. Chen, W.-L.J.I.J.o.H. Hsu, M. Transfer, Estimation of heat-transfer characteristics on a vertical annular circular fin of finned-tube heat exchangers in forced convection, 51(7-8) (2008) 1920-1932.
[5] F. Dong, Q. Fan, Y. Cai, S. Jiang, C. Guo, W. Norihiko, W.-T. Lee, Numerical simulation of boiling heat transfer in water jacket of DI engine, 0148-7191, SAE Technical Paper, 2010.
[6] T. Bo, CFD homogeneous mixing flow modelling to simulate subcooled nucleate boiling flow, 0148-7191, SAE Technical Paper, 2004.
[7] K. Robinson, IC engine coolant heat transfer studies, University of Bath, 2001.
[8] O. Zeitoun, M.J.J.o.H.T. Shoukri, Bubble behavior and mean diameter in subcooled flow boiling, 118(1) (1996) 110-116.
[9] W. Idsinga, N. Todreas, R.J.I.J.o.M.F. Bowring, An assessment of two-phase pressure drop correlations for steam-water systems, 3(5) (1977) 401-413.
[10] N.J.A.P.N.H.T.C.M. Kurul, Minnesota, USA,, On the modeling of multidimensional effects in boiling channels, (1991).
[11] B. Končar, I. Kljenak, B.J.I.J.o.H. Mavko, M. Transfer, Modelling of local two-phase flow parameters in upward subcooled flow boiling at low pressure, 47(6-7) (2004) 1499-1513.
[12] E. Krepper, B. Končar, Y.J.N.E. Egorov, Design, CFD modelling of subcooled boiling—concept, validation and application to fuel assembly design, 237(7) (2007) 716-731.
[13] V. Tolubinsky, D. Kostanchuk, Vapour bubbles growth rate and heat transfer intensity at subcooled water boiling, in: International Heat Transfer Conference 4, Begel House Inc., 1970.
[14] H.J.I.J.o.H. Ünal, M. Transfer, Maximum bubble diameter, maximum bubble-growth time and bubble-growth rate during the subcooled nucleate flow boiling of water up to 17.7 MN/m2, 19(6) (1976) 643-649.
[15] O. Zeitoun, M.J.I.j.o.h. Shoukri, m. transfer, Axial void fraction profile in low pressure subcooled flow boiling, 40(4) (1997) 869-879.
[16] M.D. Bartel, Experimental investigation of subcooled boiling, 1999.
[17] V. Prodanovic, D. Fraser, M. Salcudean, Bubble behavior in subcooled flow boiling of water at low pressures and low flow rates, International Journal of Multiphase Flow, 28(1) (2002) 1-19.
[18] S. Hua, R. Huang, P. Zhou, Numerical investigation of two-phase flow characteristics of subcooled boiling in IC engine cooling passages using a new 3D two-fluid model, Applied Thermal Engineering, 90 (2015) 648-663.
[19] E. Chen, Y. Li, X. Cheng, L.J.N.E. Wang, Design, Modeling of low-pressure subcooled boiling flow of water via the homogeneous MUSIG approach, 239(10) (2009) 1733-1743.
[20] W.J.P.Z. Fritz, Berechnung des maximalvolumes von dampfblasen, 36 (1935) 379-384.
[21] T. Lee, G. Park, D. Lee, Local flow characteristics of subcooled boiling flow of water in a vertical concentric annulus, International Journal of Multiphase Flow, 28(8) (2002) 1351-1368.
[22] G.-x. Li, S. Fu, Y. Liu, Y. Liu, S.-z. Bai, L. Cheng, A homogeneous flow model for boiling heat transfer calculation based on single phase flow, Energy Conversion Management, 50(7) (2009) 1862-1868.
[23] S. Antal, R. Lahey Jr, J. Flaherty, Analysis of phase distribution in fully developed laminar bubbly two-phase flow, International Journal of Multiphase Flow, 17(5) (1991) 635-652.
Amirkabir Journal of Mechanical Engineering
Volume 50, Issue 4
November and December 2018
Pages 711-726

Files

Share

How to cite

Statistics