Grille opening size 변화에 따른 soaking구간에서의 underhood 온도변화에 대한 해석적 연구

다국어 초록 (Multilingual Abstract)

Heat source information on design parameters of components located in and underbody are required because these parameters affect final heat damage. Most of automotive makers have their own data of heat impact on the relationship between design parameters and heat source, which was mostly obtained by experimental and trial-and-error methods in the past. Thermal soak study and issues execute in an early stage of the development phase of a new vehicle. Thermal soak results from vehicle with high load after driving and shutting off engine. Underhood and underbody flow are stagnant pattern, and these are simulated by natural convection. At this time, the components close to exhaust system are affected by thermal fluid. For the complex geometry, a 3-D computational program is used to consider heat transfer, which results in steady and transient analysis. Based on these premises a numerical method is developed and validated for a simplified test case as well as for a full vehicle.