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Model of a Turbocharged Diesel Engine With New Intercooler Model
Published June 01, 1997 by ISATA - Dusseldorf Trade Fair in United Kingdom
Event: ISATA 1997
Diesel engine models provide engine designers with an invaluable research tool. One benefit is the large saving in production time and cost which is achievable when parameter studies are undertaken on computer whilst dispensing with the need to build a large number of engine prototypes. This motivation for engine modelling is particularly salient for manufacturers of medium-speed diesel engines which have very high specific unit costs compared with, say, automotive engines. A model has been developed for a 6-cylinder, medium-speed turbocharged and intercooled diesel engine.
The work here concentrates on one aspect of the turbocharger system, namely the intercooler. A new intercooler model is examined which incorporates experimental steady-flow data to enable a more accurate representation of the complete turbocharging system to be achieved. The results presented below show the intercooler performance over a range of operating conditions and give predictions of the pressure and temperature drops across the intercooler which serves to validate the generic behavior of the model. It is hoped that results from experimental work currently being undertaken at UMIST and a comparison with the predictions presented here will be published shortly.