2012
IMAACA 2012 Proceeding
A method predicting temperature rise of oil-hydraulic system considering heat balance between oil-passage and housing
Authors: Kohki Tomioka, Kazuhiro Tanaka, Hiroshi Higo, Fumio Shimizu
Abstract
Aircrafts have actuators as key elements such as electro- hydrostatic actuators (EHA). They are so compact and highly-pressurized. The small heat capacity or the small surface of heat dissipation for high heat load causes high temperature rise of the system. This paper summarizes the thermal modeling effort and its utility in designing a thermal predicting solution for an oil- hydraulic system. Lumped-parameter thermal models coupled with three-dimensional analysis method by CFD (Computational Fluid Dynamics) have been developed to characterize component heat transfer within their operating environments. The results on time-variant temperature rise in each component, simulated by the method, agree well with the experimental data.
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