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TECHNICAL PAPERS: Internal Combustion Engines: Flow, heat transfer, and combustion

Analysis and Modeling of the Fluid-Dynamic Effects in Branched Exhaust Junctions of ICE

[+] Author and Article Information
F. Payri, E. Reyes, J. Galindo

CMT—Departamento de Máquinas y Motores Térmicos, Universidad Politécnica de Valencia, P.B. 22012, E-46071 Valencia, Spaine-mail: cmt@mot.upv.es

J. Eng. Gas Turbines Power 123(1), 197-203 (Nov 03, 2000) (7 pages) doi:10.1115/1.1339988 History: Received April 27, 2000; Revised November 03, 2000
Copyright © 2001 by ASME
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References

Tabaczynski, R., 1982, “Effect of the Inlet and Exhaust System Design on Engine Performance,” SAE paper 821577.
Winterbone,  D. E., 1982, “The Use of Gas Dynamics to Improve Reciprocating Engine Performance,” Isr. J. Technol., 20, pp. 71–80.
Winterbone, D. E., 1987, “The Application of Gas Dynamic for the Design of Engine Manifolds,” Congress on Modelling of ICE, Valencia, Paper No. CMT8701.
Blair, G. P., 1996, Design and Simulation of Two-Stroke Engines, Society of Automotive Engineers, Warrendale, PA.
Benajes, J., Torregrosa, A. J., Reyes, M., and Brunel, J. P., 1993, “The Effect of Exhaust Pipe Geometry on the Engine Performance,” International Congress “Diesel Engines,” SIA 93081.
Benajes, J., Reyes, E., Bermudez, V., and Serrano, J. R., 1998, “Pre-Design Criteria for Exhaust Manifolds in IC Automotive Engines,” SAE paper 980783.
Janota,  M. S., and Watson,  N., 1973, “Pulse Converters-A Method of Improving the Performance of the Turbocharged Diesel Engine,” Proc. Inst. Mech. Eng., 1, pp. 635–647.
Benson, R. S., and Alexander, G. I., 1977, “The Application of Pulse Converters to Automotive Four Stroke Cycle Engines. Part 1: Gas Dynamic Application of the Pulse Converters to Automotive Four-Stroke Cycle Engines. Part II: Optimization of Pulse-Converter-Turbo-Charger Combination,” SAE paper 770034.
Winterbone,  D. E., Nichols,  J. R., and Alexander,  G. I., 1985, “Efficiency of the Manifolds of Turbocharged Engines,” Proc. Inst. Mech. Eng., Part D (J. Automob. Eng.), 199, pp. 137–149.
Winterbone, D. E., Alexander, G. I., and Nichols, J. R., 1985, “Developments in Methods of Considering Wave Action in Pipes Connected to I.C. Engines,” International Simposium On Flows in Internal Combustion Engines-III, ASME Winter Annual Meeting, pp. 71–77.
Benson,  R. S., Woollatt,  D., and Woods,  W. A., 1963-64, “Unsteady Flow in Simple Branch Systems,” Proc. Inst. Mech. Eng., 178, pp. 24–49.
Benson, R. S., 1982, The Thermodynamics and Gas Dynamics of Internal Combustion Engines, Vol. 1, Clarendon Press, Oxford.
Bingham,  J. F., and Blair,  G. P., 1985, “An Improved Branched Pipe Model for Multicylinder Automotive Engine Calculations,” Proc. Inst. Mech. Eng., Part D (J. Automob. Eng.), 199, pp. 65–77.
Blair, G. P., 1994, “Non-Isentropic Analysis of Branched Flow in Engine Ducting,” SAE Paper 940395.
Bulaty,  T., and Widenhorn,  M., 1993, “Unsteady Flow Calculation of Sophisticated Exhaust Systems Using a Multibranch Junction Model,” Trans. ASME: J. Eng. Gas Turbines Power, 115, pp. 756–760.
Endo, M., and Iwamoto, J., 1995, “Numerical Analysis of Pulsatile Flow in Pipe System With Three-Way Junction,” SAE paper 952068.
Dimitriadis, C., Leschziner, M. A., and Winterbone, D. E., 1985, “Computation of Three Dimensional Flow in Manifold-Type Junctions,” International Simposium on Flows in Internal Combustion Engines III, ASME Winter Annual Meeting, pp. 57–62.
Kuo, T., and Chang S., 1993, “Three-Dimensional Steady Flow Computations in Manifold-Type Junctions and a Comparison With Experiment,” SAE Paper 932511.
Flamang,  P., and Sierens,  R., 1988, “Study of the Steady-State Flow Pattern in a Multipulse Converter by LDA,” J. Eng. Gas Turbines Power, 110, pp. 515–522.
Reyes, M., Espinoza, H., Reyes, E., and Galindo, J., 1997, “Una Condición de Contorno para el Modelado del Efecto Eyector en Uniones de Conductors de Escape de Motores de Combustion Interna,” Congreso Iberoamericano de Ingenierı́a Mecanica, La Habana, Cuba.
Galindo, J., 1998, “Design of Exhaust Manifold Junctions of Reciprocating Engines,” (in Spanish) Servicio de publicaciones de la Universidad Politécnica de Valencia, Spain, ISBN 84-7721-614-2.

Figures

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Pressure transducer cooler
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Detail of the junction geometry
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Cross-section diagram of the junctions (a) and interface between active and lateral branch (b)
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Velocity vectors at junction symmetry plane calculated by 3D modeling
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Flow patterns at junction
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Measured pressure downstream (location 3) and upstream (location 4: closed branch) the junction for several engine speeds
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Experimental and calculated pressure in location 4
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Mass flow rate in the lateral branch
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Actual and isentropic mass flow rate in the lateral branch
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Lateral branch discharge coefficient
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Experimental and modeled pressure. Junction without reed
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Experimental and modeled pressure. Junction with reed
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Exhaust junction instrumentation

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