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Experimental and Theoretical Analysis of the Drag Torque in Wet Clutches

Haojie Pan1, *, Xiaojun Zhou1

1 School of Mechanical Engineering, Zhejiang University, Hangzhou, 310000, China.

* Corresponding Author: Haojie Pan. Email: email.

(This article belongs to this Special Issue: EFD and Heat Transfer)

Fluid Dynamics & Materials Processing 2019, 15(4), 403-417.


Traditional mathematical models cannot predict and explain the phenomenon by which the drag torque (DT) in wet clutches rises in the high-speed zone. In order to evaluate the DT in such conditions, a two-phase air-fluid mathematical model for a DT with grooves was elaborated. The mathematical model was based on the theory of viscous fluid flow. A two-phase volume of fluid model was also used to investigate the distribution and volume fraction of air and fluid. Experiments on three friction plates with different grooves were conducted to validate the resulting mathematical model. It was found that the gap between plates decreased in the high-speed zone, thereby producing an increase of the DT in the high-speed zone. These results support the understanding of the physical phenomena relating to disengaged wet clutches, and provide a theoretical basis for the future improvement of drive systems.


Cite This Article

Pan, H., Zhou, X. (2019). Experimental and Theoretical Analysis of the Drag Torque in Wet Clutches. FDMP-Fluid Dynamics & Materials Processing, 15(4), 403–417.


cc This work is licensed under a Creative Commons Attribution 4.0 International License , which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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