トルクコンバータのタービンバイアス角が流れと性能に及ぼす影響〔流体工学, 流体機械〕

概要

論文の詳細を見る
The turbine bias angle, one of the major design parameters of a three-element automotive torque converter, is investigated in terms of its influence on internal flow and performance. The internal flow through the three elements of a torque converter at a speed ratio of 0.8 is computed using a three-dimensional CFD code. The flow field within the turbine blade passage is analyzed in detail for three turbines with different bias angles. The results show that a large friction loss or deceleration loss is generated in a turbine with an excessively small or large bias angle, leading to performance deterioration. A correlation is also seen between the overall torque converter efficiency and the turbine efficiency. The computed overall efficiency and the secondary flow pattern near walls of the turbine passage agree well with the tendencies of the experimental results obtained using actual machines in terms of the bias angle.
1997-12-25