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Analysis of a Turbocharged Intercooled 20-Cylinder, Medium- Speed Diesel Engine
Published November 03, 1998 by Institution of Mechanical Engineers in United Kingdom
A 20-cylinder turbocharged intercooled medium-speed diesel engine has been developed in response to market demands for higher power output. The engine has been fitted with two single- entry turbochargers, one for each bank of cylinders, and this necessitates the use of pulse converters at each exhaust junction. A computer model of the engine has been developed in which the total engine system, including the turbocharger turbine and compressor, and the intercooler, has been modeled. The pulse converters have been modeled as pressure-loss junctions and the simulation has been used to investigate the effect of these devices on the exhaust system flow dynamics. It was found that the computer model can predict the measured gross output of the engine over its operating range. In addition, the model is able to predict the measured variation in the cylinder exhaust temperatures, and show the efficacy of the pulse converters: such results could not be obtained from other approaches.