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The fuel film thickness resulting from diesel fuel spray impingement was measured in a chamber at conditions representative of early injection timings used for low temperature diesel combustion. The adhered fuel volume and the radial distribution of the film thickness are presented. Fuel was injected normal to the impingement surface at ambient temperatures of 353 K, 426 K and 500 K, with densities of 10 kg/m3 and 25 kg/m3. Two injectors, with nozzle diameters of 100 μm and 120 μm, were investigated. The results show that the fuel film volume was strongly affected by the ambient temperature, but was minimally affected by the ambient density. The peak fuel film thickness and the film radius were found to increase with decreased temperature. The fuel film was found to be circular in shape, with an inner region of nearly constant thickness. The major difference observed with temperature was a decrease in the radial extent of the film.

In this paper, a procedure to obtain the compressor map (pressure ratio vs. mass flow rate) is showed by scaling of the available compressor maps with similar shape and design using scaling theorem. The reason to develop such procedure is that in industrial application, a new compressor map need be developed before the complete geometry and hardware of compressor are known. Such procedure is especially useful for users such as engine or vehicle OEM to quickly select turbocharger compressor independently. The scaling law is used to model the non-dimensional parameters of compressor head coefficient vs. mass flow coefficient. Detail procedure from the non-dimensional parameters to the final compressor performance data are described.

UV (Ultra-Violet) curing involves the polymerization and crosslinking of functional monomers and oligomers (usually liquid) into a crosslinked polymer network (usually solid film) induced by UV lights (photons). The curing is very fast and occurs in a fraction of a second. Curing proceeds by either free radical or cationic mechanism. Reactive monomers, oligomers and photoinitiators are the three major chemical components in a typical UV curing formulation. The basic chemistry and technology of UV curing will be covered. The paper will end with a brief discussion of preliminary studies of UV curable systems with outstanding weathering resistance for exterior applications such as automotive parts manufacturing.