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TECHNICAL PAPERS: Internal Combustion Engines

Computational Modeling of Natural Gas Injection in a Large Bore Engine

[+] Author and Article Information
Gi-Heon Kim, Allan Kirkpatrick, Charles Mitchell

Department of Mechanical Engineering, Colorado State University, Fort Collins, CO 80523

J. Eng. Gas Turbines Power 126(3), 656-664 (Aug 11, 2004) (9 pages) doi:10.1115/1.1762906 History: Received October 01, 2002; Revised December 01, 2003; Online August 11, 2004
Copyright © 2004 by ASME
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References

Birch,  A. D., Brown,  D., Dodson,  M., and Swaffield,  F., Dodson,  M., 1984, “The Structure and Concentration Decay of High Pressure Jets of Natural Gas,” Combust. Sci. Technol., 36, pp. 249–261.
Ewan,  B. C. R., and Moodie,  K., 1986, “Structure and Velocity Measurements in Underexpanded Jets,” Combust. Sci. Technol., 45, pp. 275–288.
Li,  Y., Kirkpatrick,  A., Mitchell,  C., and Willson,  B., 2004, “Characteristic and Computational Fluid Dynamics Modeling of High Pressure Gas Jet Injection,” ASME J. Eng. Gas Turbines Power, 126, pp. 192–197
Ouellette,  P., and Hill,  P., 2000, “Turbulent Transient Gas Injections,” ASME J. Eng. Gas Turbines Power, 122, pp. 743–753.
Mather, D. K., and Reitz, R., 2000, “Modeling the Effects of Auxiliary Gas Injection on Diesel Engine Combustion and Emissions,” SAE Paper 2000-01-0657.
Gaillard, P., 1984, “Multidimensional Numerical Study of the Mixing of an Unsteady Gaseous Fuel Jet With Air in Free and in Confined Situations,” SAE Paper 840225.
Han, Z., Tsao, K., and Abdalla, M., 1994, “Computation of the In-Cylinder Processes of a Natural Gas Engine,” SAE Paper 940213.
Gundappa, M., Denlinger, M., Dulaney, K., Campbell, L., and McCarthy, J., 2000, “Computational Fluid Dynamics Modeling of Internal Combustion Engine Performance and Emissions,” Proc Gas Machinery Conference, Austin, TX.
Boyer,  R., Craig,  D., and Miller,  C., 1954, “A Photographic Study of Events in a 14-In. Two-Cycle Gas Engine Cylinder,” Trans. ASME, 76, pp. 97–108.
Conley,  R., Hoffman,  J., and Thompson,  H., 1985, “An Analytical and Experimental Investigation of Annular Propulsive Nozzles,” J. Aircr., 22, pp. 270–276.
Sawada,  K., and Asami,  K., 1997, “Numerical Study on the Underexpanded Coanda Jet,” J. Aircr., 34, pp. 641–647.
Abraham, J., and Magi, V., 1997, “Computations of Transient Jets: RNG k-e Model Versus Standard k-e Mode,” SAE Paper 970885.
Papageorgakis, G., and Assanis, D., 1998, “Optimizing Gaseous Fuel-Air Mixing in Direct Injection Engines Using an RNG Based k-e Model,” SAE Paper 980135.
Olsen, D., Mastbergen, D., and Willson, B., 2001, “Planar Laser Induced Flourescence Imaging of Gas Injection From Fuel Valves for Large Bore Natural Gas Engines,” Proc. ASME-ICE Fall Technical Conf., Vol. 37-2, Paper 2001-ICE-409, New Orleans, LA.

Figures

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Axisymmetric cylinder mesh for Type A poppet valve
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Methane mole fraction and velocity magnitude for Type A poppet valve, (a–c) 4 bar injection, (d–f) 35 bar injection. (a) 1 ms after SOI, (b) 4 ms, (c) 7 ms, (d) 1 ms after SOI, (e) 2 ms, (f) 3 ms.
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Flow structures downstream of the Type A valve with 4 bar fuel injection. (a) 2 ms after SOI, (b) 7 ms after SOI.
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Development of flow structures downstream of the Type A valve with 35 bar fuel injection; (a) 0.6 ms after SOI, (b) 1.2 ms, (c) 1.8 ms, (d) 2.4 ms, (e) 3.0 ms
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Steady-state flow past Type A poppet valve, (a–d) 4 bar injection, (e–h) 35 bar injection. (a) Computational mesh, (b) Mach number contours, (c) static pressure contours, (d) cylinder pressure contour, (e) computational mesh, (f) Mach number contours, (g) static pressure contours, (h) cylinder pressure contour.
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Mesh for simulation of off-engine PLIF tests
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Comparison of PLIF results and CFD with 4 bar injection
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Comparison of PLIF results and CFD with 35 bar injection
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Contours of static pressure and Mach number with corresponding axial profiles with 4 bar injection, steady flow computation
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Contours of static pressure and Mach number with corresponding axial profiles for 35 bar injection, steady flow computation
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Axial velocity (a–b) and momentum (c–d) profiles in radial direction at seven equally spaced downstream locations (a) 4 bar injection, (b) 35 bar injection, (c) 4 bar injection, (d) 35 bar injection
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Mass and energy flow rates along axial locations. Mass flow rate—(•) 4 bar injection, (○) 35 bar injection; kinetic energy flow rate—(▪) 4 bar injection, (□) 35 bar injection; enthalpy flow rate—(▴) 4 bar injection, (▵) 35 bar injection.
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Axisymmetric mesh for moving piston simulations
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Mixing fraction profiles with 4 bar injection. (a) Flammable mixture fraction, (b) flammable fuel fraction.
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Mixing fraction profiles with 35 bar injection. (a) Flammable mixture fraction, (b) flammable fuel fraction.
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Flammable mixture fractions at TDC as a function of injected fuel mass
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Contours of methane mole fraction at TDC. (a) 4 bar injection, (b) 35 bar injection.
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Contours of turbulent kinetic energy (m2 /s2 ) at TDC. (a) 4 bar injection, (b) 35 bar injection.

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