シミュレーションによるエンジン排気流路形状の最適化

抄録

In order to represent the real world faithfully, recent simulations are becoming more complex and more time-consuming. These trends often make simulation an impractical tool for parameter design. This study therefore investigates methods of carrying out parameter design effectively even when intensive simulation is necessary. More specifically, orthogonal polynomials are used to simplify the simulation. This enables computational time to be reduced to a negligible level even when error conditions are assigned to an outer orthogonal array. When applied to the optimization of the shape of the exhaust port of an engine,this approach led to adequate reproducibility of the gain, greatly reduced the number of computational specifications required in the simulation, and produced an optimum shape in a short time.