Shell-and-tube heat exchanger is a product with simple structure, mature technology, and convenient use. The heat exchanger mentioned in this study is used in a vehicle exhaust heating system, which uses the exhaust heat of the engine to heat the air inside the vehicle, improve the internal heating effect of the vehicle in the cold season, realize waste turning into treasure, save energy, and reduce emissions. In this study, CATIA three-dimensional software is used to carry out detailed modeling of heat exchangers. The flow path which is extracted from ANSYS software and simplified is divided into mesh. The appropriate boundary conditions are used to calculate the CFD three-dimensional numerical simulation, calculating the velocity field, temperature field, and pressure field inside the fluid heat exchanger at different temperature inlets. The test platform is used to test the temperature field of the heat exchanger. The simulation results are in good agreement with the experimental test data, which provides a good research method for heat exchanger design and performance prediction.
