Modeling Heat Transfer in a Wet Clutch

1990 ◽  
Author(s):  
David A. Pacey ◽  
Ralph O. Turnquist
Keyword(s):  
Heat Transfer ◽  
Wet Clutch

Modeling of Heat Transfer and Fluid Hydrodynamics for a Multidisc Wet Clutch

1995 ◽  
Author(s):  
Yubo Yang ◽  
Robert C. Lam ◽  
Yih Fang Chen ◽  
Hiroshi Yabe
Keyword(s):  
Heat Transfer ◽  
Wet Clutch ◽  
Fluid Hydrodynamics

A Numerical Study on the Influence of Grooves on Heat Transfer Performance of Wet Clutch

2012 ◽  
Vol 249-250 ◽  
pp. 517-522 ◽  
Author(s):  
Yu Long Lei ◽  
Jie Tao Wen ◽  
Xing Zhong Li ◽  
Cheng Yang
Keyword(s):  
Heat Transfer ◽  
Numerical Study ◽  
Three Dimensional ◽  
Friction Material ◽  
Navier Stokes ◽  
Navier Stokes Equation ◽  
Linear Distribution ◽  
Exchange Performance ◽  
Wet Clutch ◽  
Oil Flow

In order to evaluate the efficacy of grooves on cooling performance of wet clutch, a numerical analysis based on the computational fluid dynamics (CFD) code FLUENT is presented in this study. This analysis is based on the numerical solution of the three-dimensional Navier-Stokes equation, coupled with the energy equation in the flow and the heat conduction equations in the friction material and the core disk. The turbulence characteristics were predicted using RNGk-ε model. The flow field and temperature distributions in radial grooves are obtained. It is shown that radial grooves possess the highest heat exchange performance at the entrance and is not linear distribution in the radial direction and cooling oil flow has a little effect on the highest temperature of friction plate. With the developed analysis method, it is possible to easily and quickly investigate the heat transfer behaviour of wet cluth with groove patterns.

Study of Heat Transfer in Relation to ATF Flow in a Wet Clutch

2009 ◽  
Vol 35 (5) ◽  
pp. 454-458
Author(s):  
Masatoshi Miyagawa ◽  
Masataka Ogawa ◽  
Hiroki Hara ◽  
Shinobu Sasaki ◽  
Yasunori Okano
Keyword(s):  
Heat Transfer ◽  
Wet Clutch

scholarly journals Dynamic Temperature Rise Mechanism and Some Controlling Factors of Wet Clutch Engagement

2016 ◽  
Vol 2016 ◽  
pp. 1-12 ◽  
Author(s):  
Zhang Zhigang ◽  
Shi Xiaohui ◽  
Guo Dong
Keyword(s):  
Heat Transfer ◽  
Temperature Rise ◽  
Transmission Model ◽  
Radial Temperature ◽  
Dynamic Temperature ◽  
Heat Transfer Theory ◽  
Clutch Engagement ◽  
Friction Disk ◽  
Wet Clutch ◽  
Three Components

The friction transmission model of wet clutch is established to analyze the friction transmission mechanism of its engagement. The model is developed by applying both the average flow model and the elastic contact model between the friction disk and separator plate. The key components during wet clutch engagement are the separator plate, friction disk, and lubricant. The one-dimension transient models of heat transfer in radial direction for the three components are built on the basis of the heat transfer theory and the conservation law of energy. The friction transmission model and transient heat transfer models are coupled and solved by using the Runge-Kutta numerical method, and the radial temperature distribution and their detailed parametric study for the three components are conducted separately. The simulation results show that the radial temperature for the three components rises with the increase of radius in engagement. The changes in engagement pressure, lubricant viscosity, friction lining permeability, combined surface roughness RMS, equivalent elasticity modulus, difference between dynamic and static friction coefficients, and lubricant flow have important influence on the temperature rise characteristics. The proposed models can get better understanding of the dynamic temperature rise characteristics of wet clutch engagement.

Modeling of heat transfer for a wet multi-plate clutch based on empirical data

2017 ◽  
Vol 232 (12) ◽  
pp. 1634-1647
Author(s):  
SC Kim ◽  
SB Shim
Keyword(s):  
Heat Transfer ◽  
Empirical Data ◽  
System Analysis ◽  
Experimental Results ◽  
Design Parameters ◽  
Percentage Error ◽  
Inlet Temperature ◽  
Transfer Model ◽  
Validation Parameters ◽  
Wet Clutch

A heat transfer model of a wet multi-plate clutch based on empirical data is presented in this paper. Lumped system analysis was used to simplify the complex heat transfer system of the wet clutch. The model has included the effects of various design parameters of the wet clutch, such as rotating speed, flow rate and inlet temperature of the lubricant, clutch sizes, and groove types, by using the correlations of the heat convection coefficient. The correlations were obtained from 96 experiments that were designed to study the effects of the design parameters. The coefficients of the correlations were determined by the non-dominated sorting genetic algorithm (NSGA-II) to minimize errors between the simulated and the experimental results. The simulated results were compared with the experimental results to demonstrate the validity of the model and the correlations by using the percentage error, the root-mean-square error, and the correlation coefficient. The validation parameters were in good agreement with the experimental results.

Numerical and experimental research on engagement process of wet multi-plate friction clutches with groove consideration

2019 ◽  
Vol 233 (10) ◽  
pp. 1464-1482 ◽  
Author(s):  
Peng-hui Wu ◽  
Jin Xu ◽  
Xiao-Jun Zhou
Keyword(s):  
Heat Transfer ◽  
Finite Element ◽  
Numerical Model ◽  
Influencing Factors ◽  
Experimental Research ◽  
Revolution Speed ◽  
Heat Transfer Theory ◽  
Wet Clutch ◽  
Engagement Process ◽  
And Behavior

A numerical model is established to investigate the effects of the influencing factors such as design parameters and operating conditions on the performance and behavior of the engagement process of the wet clutch based on the Navier–Stokes equations, contact mechanics, and heat transfer theory. A finite element contact model called KE contact model is used to analyze the rough contact during engagement process and thermal effect on the viscosity is considered based on heat transfer theory. The integration of the grooving into the simulation and the method of coupled finite element by domain decomposition of groove and ungrooved areas are put forward to facilitate the analysis. The experimental results agree well with the numerical model which takes the normal pressure, the temperature of ATF, relative revolution speed, the permeability and the groove geometry into account. The results of numerical simulation and the experiment indicate that the applied pressure not only affects the engagement time, but also has influence on the value of the engagement torque. Besides, the engagement time is roughly proportional to the relative revolution speed. The influencing factors such as the temperature of ATF, the permeability, grooves, the torque judders and effects of PID control parameters are also discussed in the paper. The performance and behavior of the engagement of the wet clutch were studied by two methods of numerical calculation and experimental research, which make the working process of the wet clutch more detailed.

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