TY - JOUR AB - Purpose The purpose of this paper is to reduce the drag loss and study the effects of operating conditions and groove parameters such as flow rate and temperature of automatic transmission fluid, clearance between plates, groove depth and groove ratio on the drag torque of a wet clutch for vehicles, parametric analysis of the drag torque model of wet multi-plate friction clutch with groove consideration.Design/methodology/approach Both experimental and numerical research was carried out in this work. Parametric groove models, full film lubrication flow model and pressure distribution model are established to investigate the effects of the grooves on drag torque of a wet clutch. Multigrid method is used to simplify the solution.Findings In this paper, a drag torque model of a wet multi-plate friction clutch based on the basic theory of viscous fluid dynamics is examined through experimental and numerical methods that take grooves into account, and the change trend of drag torque with operating conditions and groove parameters is analyzed.Originality/value Multigrid method is used to solve the governing equations, which simplifies the solution process because of the restrictions and interpolation operations between the adjacent layers of coarser and fine grids. These works provide insight into the effect regularity of operating conditions and groove parameters on drag torque of a wet multi-plate friction clutch. Furthermore, variable test conditions and sufficient experimental data are the main functions in the experimental research. VL - 70 IS - 7 SN - 0036-8792 DO - 10.1108/ILT-03-2017-0063 UR - https://doi.org/10.1108/ILT-03-2017-0063 AU - Wu Peng-hui AU - Zhou Xiaojun AU - Yang Chenlong AU - Lv Haoliang AU - Lin Tianhao AU - Wu Xuelei PY - 2018 Y1 - 2018/01/01 TI - Parametric analysis of the drag torque model of wet multi-plate friction clutch with groove consideration T2 - Industrial Lubrication and Tribology PB - Emerald Publishing Limited SP - 1268 EP - 1281 Y2 - 2024/04/25 ER -