The influence of exhaust junction geometry on flow-dynamics of exhaust gas is analyzed. The authors propose an experimental characterization method based on the measurement of the instantaneous pressure in the junction operating with engine exhaust flow and solving the problems posed for the accurate instantaneous pressure measurements under the adverse temperature condition. In this paper, the method is applied to two “Y” type junctions, with a reed being the unique difference between them, to determine the influence of this element on the junction behavior. The analysis of the experimental results denotes two major differences: the characteristics of the wave reflected at the junction, and the energy of the pulse transmitted to the lateral branch of the junction. The results of the analysis are introduced in the junction modeling used in a one-dimensional gas dynamic model with an important improvement in the agreement of the modeled predictions with the experimental measurements.
Analysis and Modeling of the Fluid-Dynamic Effects in Branched Exhaust Junctions of ICE
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, Apr. 27, 2000; final revision received by the ASME Headquarters, Nov. 3, 2000. Associate Editor: D. Assanis.
Payri , F., Reyes , E., and Galindo, J. (November 3, 2000). "Analysis and Modeling of the Fluid-Dynamic Effects in Branched Exhaust Junctions of ICE ." ASME. J. Eng. Gas Turbines Power. January 2001; 123(1): 197–203. https://doi.org/10.1115/1.1339988
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