Numerical research on hydraulic and thermal performance of the motor water jackets based on the orthogonal experiment

The relationship between the motor water jacket design parameters (such as the number of turns, geometry of the cooling duct) and the hydraulic and thermal performance is investigated in this paper. A three-dimensional numerical simulation model for water jacket is developed and calibrated with the experimental data. 27 models are selected by the orthogonal experiment method (OEM) for the multi-level and multi-factor problem. As investigated from the result of the calibrated CFD analysis, it can be seen that, the impact of the number of turns, the ratio between the width of tendon and the width of ducts section and the height of ducts section on heat transfer is reduced in sequence. The influence of the number of turns, the height of ducts section and the ratio between the width of tendon and the width of ducts section on pressure drop is reduced in sequence. Also the best combination of these three geometric factors of spiral cooling ducts is determined.