A Study of the Transient Analysis Technique on the Under Hood Thermal Damage
Vehicle engine cooling and under-floor heat protection is very important at the early stage of vehicle development. Nowadays, numerical analysis in this area is very common. Engineers can decide the radiator and bumper opening area, fan and radiator size by engine room airflow and temperature distribution analysis. At the same time, the results also can be used to prove effective heat protection method for the vulnerable components around the exhaust manifold and pipe. But, solving both cases at the same time is considered as very difficult because of large analysis domain, complicate model and very long solving time. The study provides an effective method for analysis the engine cooling and heat damage by two-way coupling between CFD code Star-CCM+ and a special heat transfer program RadTherm. Especially, the study attempted transient analysis at the ignition off condition just after 8%, 50kph uphill driving.