Design Method of Blade Thickness based on Fluid Structure Interaction of Hydrodynamic Torque Converter

Abstract:

Hydrodynamic torque converter blade thickness is traditionally determined by blade empirical streamline formula. However, this method fails to represent coupling torque variation between blades and fluid, and therefore easily results in poor performance of torque converter. Based on high precision fluid structure interaction(FSI) analysis of hydrodynamic torque converter, this paper proposes a blade thickness design by evaluating converter performance. Blade thickness curve is deduced on the condition of meeting the constraints of blades stress intensity and blades thickness curvature variation. In this paper, a hydrodynamic torque converter example demonstrates that blades thickness has a strong correlation with fluid field distribution. And this method is effective on improving torque ratio, efficiency and dynamic performance, and provides a reference workflow for hydrodynamic torque converter design in industry.