02_AME_CS2_Rev10——环控库培训（英文）.pdfVIP

LMS Imagine.Lab training – AME_CS2 Chapter 1 – The Heat Exchangers Assembly Tool Library AME_CS2 – Design of Cooling Systems #2 Subsystems analysis: under hood systems 2 copyright LMS International - 2008 Introduction  Why ?  Increasing constraints within the underhood environment (front end design, increasing number of heat exchangers with A/C, turbocharging, …)  Need of a tool able to handle the interactions between the main thermal systems, i.e. cooling systems, refrigerant loop, oil circuit, air intake, …  HEAT = Heat Exchanger Assembly Tool  Module for the handling of heat exchanger stacks  3D Pre/Post-Treatment  Thermal interaction between the different heat exchangers  Coupling: CFD • Import of velocity maps on radiator/exchanger entry surfaces + geometry of the stack • Export of outlet radiator/exchanger temperature maps (AMESim calculation) towards CFD code [Powerflow from EXA] 3 copyright LMS International - 2008 Presentation of the HEAT library A 3D window … A library A classical AMESim environment 4 copyright LMS International - 2008 Main features: 2 operating modes  Velocity Mode: • The air side velocities (homogenous or not) are imposed on the upstream surfaces of each heat exchanger • The air temperatures calculated at the outlet of each heat exchanger are “projected” on downstream heat exchanger surfaces • Definition of a mesh for the calculation of exchanges between internal and external fluids as well as resulting outlet temperatures 5 copyright LMS International - 2008 Velocity mode: principle  Definition of flux zones: Velocity Mode