Analysis On The Influence Mechanism Of Cooling Water Of Turbocharger On Vehicle And Intelligent Prediction

With the continually development of the turbocharger technology, the design ofturbocharger is becoming more and more mature, the automobile engine withturbocharger is becoming mainstream. With the increasing of thermal load, theproblem of cooling and heat dissipation on turbocharger is becoming more and moreprominent, which turns to the key factor for the further development of theturbocharging technology.The traditional designing method of the cooling system in turbocharger is basedon the experience, which is blind and bold. In this paper, based on heat transfermechanism of turbocharger bearing, a better numerical method of the coolingperformance to bearing was chose, a further analysis on the cooling mechanism andits influence factor was made. The main work and innovative points of the paper areas follows:(1) Established mathematical models about the solid heat transfer forwater-cooled bearing in turbocharger, flow and heat transfer to cooling water and oil,conjugate heat transfer on the fluid-solid boundary. Based on the mechanism of heattransfer for bearing, a direct coupling method of numerical simulation was built.(2) Combined with the characteristics of CFD software CFX, a liquid-solidcoupling model about heat transfer was established, and was numerical simulatedunder steady state. According to simulation result, the temperature distribution andcooling performance of bearing was studied, and the main water inlet and theauxiliary inlet were optimized by comparing two schemes.(3) The effect of cooling water inlet flow and temperature, engine exhausttemperature, cooling water cavity surface roughness to the cooling performance on thekey part of bearing was studied. The required amount of cooling water in differentbearing structure and working condition was studied based on the method oforthogonal experimental design, and forecasted based on support vector machine.