2011
IMAACA 2011 Proceeding
New Concept of Modeling to Predict Temperature in Oil-Hydraulic Cylinder Chamber Considering Internal Flow
Authors: Kazuhiro Tanaka, Kouki Tomioka, Masaki Fuchiwaki, Katsuya Suzuki
Abstract
It is important to study a precise and practical way to predict temperature rise of oil hydraulic systems. It is interesting whether internal flow patterns have any effect on temperature change in a cylinder. Nowadays commercial CFD (Computational Fluid Dynamics) codes give accurate solutions of temperature as well as flow patterns. The authors have calculated the flow patterns in a cylinder using a reliable CFD code and have found that three-dimensional effect is very strong there and the internal flow patterns can be classified into two flow regions with 3D vortex flow pattern and 1D parallel flow pattern. So, it becomes possible to predict precisely temperature change in a cylinder by incorporating the internal flow patterns with modeling method based on a lumped parameter system. A new method with prediction of temperature rise in a cylinder is proposed in this study.
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