Study on the Improvement of Applying Nanofluids to the Heat Load of Sliding-Contact Component System (Piston Set and Cylinder Liner)

摘要

Studies on improving heat load of sliding'contact components system (piston set and cylinder liner) by applying nanofluids have been carried out. Numerical simulation was employed and the piston set-lubricate, oil-cylinder liner was considered as a coupled component. The cases of applying either the Cu-oil nanofluid or the Cu-water nanofluid was studied and compared with original case. The numerical results showed that the applying of nanofluids could improve the heat load of piston set-cylinder liner. As to the piston, the heat transfer enhancement by the Cu-oil nanofluid is greater than Cu-water nanofluid, and the temperature of the first ring decreases notably. For the cylinder liner, the case of using the Cu-water nanofluid exhibits the better capability of heat transfer enhancing. Besides, the Cu-oil nanofluid also shows the potential in improving lubrication and friction of piston rings-cylinder liner contact.