Turbocharger heat transfer and mechanical losses influence in predicting engines performance by using one-dimensional simulation codes

摘要: Abstract The exhaust energy can represent up to 40% of the fuel chemical in turbocharged internal combustion engines. In order calculate properly available gases, a critical parameter is temperature downstream turbine. prediction this will also benefit two-stage turbochargers and after-treatment modelling that affects brake specific consumption, gases emissions scavenging process. paper, turbocharger heat transfer losses have been modelled using lumped capacitance model coupled with one-dimensional whole-engine simulation software. data from simulations Diesel engine, without model, compared experimental measurements performed an engine test bench. analysis focused on studying influence outlet temperatures predicting performance. main result study improvement both compressor turbine (up 70 K). results allow analysing how are split quantifying importance phenomena efficiency, at full load conditions as function speed.