Abstract
The heat released by losses in a hydraulic system can strongly affect its performance. Reduction in viscosity due to fluid temperature rise can increase leakage losses, in some cases to an unacceptable amount. This paper suggests approaches to the problem of assessing the temperature distribution in a hydraulic system by simulation and describes an experiment to correlate theoretical and observed behaviour. An interesting development of the work has been the simulation and experimental investigation of radiation effects under room temperature conditions. On the basis of the work it has been concluded that the radiation effects at the temperatures considered are far more significant than previously thought.
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