New Design and Analysis of Diesel Exhaust Manifold to Control Thermal Gradient

Document Type : Research Article

Authors

Department of Mechanical Engineering, Jundi-Shapur University of Technology, Dezful, Iran

Abstract

Optimization and design of new configurations in the field of engineering became faster and more accurate by improving three dimension modeling software and computational fluid dynamics methods. Exhaust manifold of the marine diesel engine, which transfers hot gases from cylinders to the turbocharger, has a problem with extreme thermal gradients and crack creation. In order to improve the heat transfer and prevent crack occurrence at the detected critical points, new configurations in geometrics design for exhaust manifold were studied in this paper. Flow simulation of thermal analysis was performed in ANSYS CFX by using Rensselaer Polytechnic Institute wall boiling model for subcooled boiling at the low pressure. Analysis indicated the single channel configuration, performed by removing output-separating wall on hot gases side, provide more uniform temperature distribution in the manifold body. Results showed the correct operation of new manifold geometry that reduces the maximum temperature of the body up to 27.36% and controls the extreme (amount of) thermal gradients. 

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References

[1] J.B. Heywood, O.Z. Welling, Trends in performance characteristics of modern automobile SI and diesel engines, SAE International Journal of Engines, 2(1) (2009) 1650-1662.
[2] H. Punekar, S. Das, Numerical simulation of subcooled nucleate boiling in cooling jacket of IC engine, 0148-7191, SAE Technical Paper, 2013.
[3] C. Karl, U. Feldhaus, CFD simulation for the cooling circuit of a truck diesel engine, MTZ worldwide, 69(2) (2008) 12-19.
[4] R. Van Basshuysen, U. Spicher, Gasoline engine with direct injection: processes, systems, development, potential, Vieweg+ Teubner, 2009.
[5] N. Kanawade, O. Siras, Design, analysis, and development of 4-cylinder IC engine exhaust manifold, International Engineering Research Journal, (2015) 472-478.
[6] M. Asari, S. Adeli, P. Nikandish, Thermal and fluid flow analysis for diesel engine exhaust manifold with regard to the boiling phenomenon and compare with experimental results, AJSR-ME, 50(4) (2018) 21-30.
[7] R. Bowring, W. Idsinga, N. Todreas, An assessment of two-phase pressure drop correlations for steam-water systems, International Journal of Multiphase Flow 3(5) (1977) 401-413.
[8] M.Z. Podowski, N. Kurul, On the modeling of multidimensional effects in boiling channels, in: 27th National Heat Transfer Conference, Minneapolis, Minnesota, USA, 1991.
[9] A.P. Shingare, N.B. Totla, Simulation of Jacket Cooling of a Liner of Four Cylinder Diesel Engine for Genset Application, International Engineering Research Journal (IERJ), (2016) 276-1283,.
[10] V.A. Romanov, N.A. Khozeniuk, Experience of the diesel engine cooling system simulation, Procedia Engineering, 150 (2016) 490-496.
[11] A. Mohammadi, M. Yaghoubi, Two phase flow simulation for subcooled nucleat boiling heat transfer calculation in water jacket of diesel engine, Journal of Engine Research, (2011).
[12] A.V. Paratwar, D.B. Hulwan, Surface temperature prediction and thermal analysis of cylinder head in diesel engine, IJERA, 3(4) (2013) 892-902.
[13] E. Chen, Y. Li, X. Cheng, L. Wang, Modeling of low-pressure subcooled boiling flow of water via the homogeneous MUSIG approach, Nuclear Engineering Design, 239(10) (2009) 1733-1743.
[14] B. Končar, I. Kljenak, B. Mavko, Modelling of local two-phase flow parameters in upward subcooled flow boiling at low pressure, International Journal of Heat Mass Transfer, 47(6-7) (2004) 1499-1513.
[15] ANSYS, ANSYS-CFX theory guide - Multiphase Flow Theory, 2006.
[16] Y. Sato, M. Sadatomi, K. Sekoguchi, Momentum and heat transfer in two-phase bubble flow—I. Theory, International Journal of Multiphase Flow, 7(2) (1981) 167-177.
[17] M. Ishii, N. Zuber, Drag coefficient and relative velocity in bubbly, droplet or particulate flows, AIChE Journal 25(5) (1979) 843-855.
[18] A. Tomiyama, Struggle with computational bubble dynamics, Multiphase Science Technology, 10(4) (1998) 369-405.
[19] S.P. Antal, R.T. Lahey Jr, J.E. Flaherty, Analysis of phase distribution in fully developed laminar bubbly two-phase flow, International Journal of Multiphase Flow, 17(5) (1991) 635-652.
[20] E. Krepper, B. Končar, Y. Egorov, CFD modelling of subcooled boiling—concept, validation and application to fuel assembly design, Nuclear Engineering Design, 237(7) (2007) 716-731.
[21] V. Tolubinsky, D. Kostanchuk, Vapour bubbles growth rate and heat transfer intensity at subcooled water boiling, in: International Heat Transfer Conference, Begel House Inc., Paris, France, 1970.
[22] M.D. Bartel, Experimental investigation of subcooled boiling, Purdue University, WestLafayette, USA, 1999.
[23] H.C. Ünal, 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.
[24] O. Zeitoun, M. Shoukri, Bubble behavior and mean diameter in subcooled flow boiling, ASME journal of Heat Transfer, 118(1) (1996) 110-116.
[25] 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.
[26] W. Fritz, Berechnung des maximalvolumes von dampfblasen, Physik. Zeitschr, 36 (1935) 379-384.
[27] 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.
[28] H.T. Angus, Cast iron: physical and engineering properties, Elsevier, London, 2013.
AUT Journal of Mechanical Engineering
Volume 3, Issue 1
May 2019
Pages 53-62

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