航空发动机轴承腔换热特性研究

轴承腔是航空发动机机械系统的重要组成部分,其换热特性对滑油系统热分析有决定性影响,为此,对航空发动机典型轴承腔的换热特性进行研究。以ANSYS有限元分析软件结合APDL语言,对典型轴承腔进行有限元建模,并对边界条件进行计算加载,得到了在不同供油量和滑油供油温度下的轴承腔换热特性曲线。采用本方法计算的轴承腔特性与发动机地面试车数据符合性良好,所得到的典型轴承腔换热特性曲线可简化滑油系统热分析,取得很好的系统计算结果。并开辟了通过提高轴承腔换热特性曲线精度而提高系统计算精度的研究途径。本文的计算方法及结果可为发动机整机试车及润滑系统设计提供参考。

Research of Heat Transfer Characteristics for Aeroengine Bearing Cavity

Bearing cavity is an important part of aeroengine mechanical system, which heat transfer characteristics has a decisive influence on the oil system thermal analysis. Therefore, the heat transfer characteristics of typical bearing cavity for aeroengine was studied. Based on ANSYS and APDL, the heat transfer characteristic curves of the bearing cavity with different fuel supply and oil temperature were obtained using finite element modeling and loading boundary condition. The bearing cavity characteristics has accordance with the engine ground test data, which can simplify the oil system thermal analysis and obtain well system calculation results. This method improves the calculation accuracy of system by increasing accuracy of bearing cavity heat transfer characteristic curves, which provides the reference for testing engine and designing oil system.