نوع مقاله : مقاله پژوهشی
نویسندگان
دانشگاه سمنان
چکیده
کلیدواژهها
موضوعات
عنوان مقاله [English]
نویسندگان [English]
The cooling system is one of the most important components that affects the performance of an engine. This system increases the heat transfer and fuel economy, leading to improved the engine performance. Most internal combustion engines have a coolant fluid that can be air or a liquid coolant that flows through a heat exchanger (radiator) and is cooled by air. The rheological and thermophysical properties of the nanofluid are of great importance for calculating the performance of pumping in this system. The heat transfer inside the radiator can be increased by increasing the heat transfer surface area and increasing the heat transfer coefficient. The heat transfer coefficient can be increased by appropriate heat transfer methods or by improving the thermophysical properties of the heat transfer medium such as coolant fluids. In this study, two samples of the thermophysical properties of the base fluid, which is a solution of distilled water and ethylene glycol with equal presence percentages, were investigated after adding titanium dioxide and silicon dioxide nanoparticles, at the temperatures of 30°C and 60°C. The viscosity, shear stress, and thermal conductivity coefficient of the prepared nanofluid were measured at two volume concentrations of 1% and 2% and then, validated using various theoretical models. The results indicated an improvement in heat transfer by 8% and 17% for the temperatures of 30°C and 60°C, respectively. The rheological behavior of the prepared nanofluid at two volume concentrations of 1% and 2% was also examined and validated using different theoretical models. Additionally, the results showed a decrease in the shear stress with increasing the temperature and an increase in the shear stress with increasing the volume concentration of nanoparticles.
کلیدواژهها [English]
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