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| Effect of ViscosityTemperature Characteristics on the Behavior of Hydro-Viscous Drive |
| (1. State Key Laboratory of Fluid Power Transmission and Control, Zhejiang University, Hangzhou 310027, China; 2. Artillery Academy, Hefei 230031, China) |
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Abstract The object of this work is to investigate the effect of temperature rise resulting from rotary speed difference between driving and driven plates on the performance of hydroviscous drive. A simplified mathematic model of the steady and laminar flow between two flat plates was established with consideration of viscositytemperature characteristics. The numerical solution of temperature, shearing stress and viscous torque were obtained by using computational fluid dynamics (CFD) code FLUENT. Then, an experiment rig was designed and developed for this work. The numerical and experimental results show that the relationship between output viscous torque and output rotary speed is nonlinear because of viscositytemperature characteristics. It also indicates that viscous torque increases as input flow rate increases, and the magnitude of viscous torque increment is significant when the output rotary speed is low. This research provides a theoretical foundation for the optimization of the performance of hydroviscous drive.
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Received: 12 November 2010
Published: 30 November 2011
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