An automotive headlamp which is necessary for nighttime driving was used as only a safety part in the past, but, latest headlamps are increasingly required not only to be a function but also to enhance a design of an automobile. These new demands make a headlamp complicated in structure, therefore, if heat transfer and flow inside a headlamp can be predicted in a design stage using the Computational Fluid Dynamics (CFD), a deformation of plastic parts by heat can be avoided, and a misting problem on a lens due to humidity control performance of plastic parts can be also predicted. As a result, this will enable to shorten a development period. In this paper, a newly-developed method called surface heat transfer (SHT), a unique technique for making an accurate estimation of temperature and velocity in an automotive headlamp without involving the use of "fluid mechanics and structure mechanics, were investigated for practical use. For the covering abstract see ITRD E123380.
Samenvatting