Pa. Bromnick et al., INTERCOOLER MODEL FOR UNSTEADY FLOWS IN ENGINE MANIFOLDS, PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART D-JOURNALOF AUTOMOBILE ENGINEERING, 212(D2), 1998, pp. 119-132
A model has been developed for intercoolers which are used to reduce t
he temperature of the charge air in turbocharged internal combustion e
ngines. The detailed theory for the intercooler model is presented. Th
e behaviour of the intercooler is characterized by the relationship be
tween the number of transfer units (N-TU) and the effectiveness (epsil
on) Of the intercooler, which is assumed to be that of a cross-flow he
at exchanger. The structure of the code used to implement the model is
presented and the model is applied to simulate the gas dynamics in a
medium-speed turbocharged and intercooled diesel engine. The results s
how the predicted variation of pressure, temperature and mass flowrate
across the intercooler and also the variation of intercooler effectiv
eness with mass flowrate.