The topic of this paper is the computational modeling of the gas injection process in a large-bore natural gas fueled engine. At high injection pressures, the overall gas injection and mixing process includes compressible flow features such as rarefaction waves and shock formation. The injection geometries examined in the paper include both a two-dimensional slot and an axisymmetric nozzle. The computations examine the effect of the supply pressure/cylinder stagnation pressure ratio, with ratios ranging from 3 to 80, on the velocity and pressure profiles in the near field region. Computational fluid dynamics modeling was compared with results obtained from a two-dimensional analytical method of characteristics solution and experimental results. The comparison process evaluated factors such as pressure and Mach number profiles, jet boundary shape, and shock location.
Characteristic and Computational Fluid Dynamics Modeling of High-Pressure Gas Jet Injection
Contributed by the Internal Combustion Engine Division of THE AMERICAN SOCIETY OF MECHANICAL ENGINEERS for publication in the ASME JOURNAL OF ENGINEERING FOR GAS TURBINES AND POWER. Manuscript received by the ICE Division, April 2002; final revision received December 2002. Associate Editor: D. Assanis.
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Li , Y., Kirkpatrick , A., Mitchell , C., and Willson, B. (March 2, 2004). "Characteristic and Computational Fluid Dynamics Modeling of High-Pressure Gas Jet Injection ." ASME. J. Eng. Gas Turbines Power. January 2004; 126(1): 192–197. https://doi.org/10.1115/1.1635398
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