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为了对压气机轮盘疲劳寿命评估和结构优化提供相应的温度场数据,采用有限元分析软件ANSYS,建立了某型发动机高压压气机转子的二维整体模型,讨论了高压压气机不同部位的边界条件和旋转盘腔内换热的规律,对高压压气机在发动机从慢车状态到最大状态下的瞬态温度场进行了计算,并分析了盘的径向温差随时间变化关系。计算结果表明:各级盘的径向温差产生在轮缘与盘中心孔附近的厚块之间;在温度场趋于稳定的过程中,径向温差先增大后减小;各级盘的最大径向温差随转子级数增加而增大。
In order to provide corresponding temperature field data for the assessment of fatigue lives and structural optimization of compressor disks, a two-dimensional global model of a certain type of engine high-pressure compressor rotor is established by finite element analysis software ANSYS. The boundary of different parts of high-pressure compressor is discussed. Conditions and the heat transfer in the rotating disk cavity, the transient temperature field of high pressure compressor in the condition of the engine from the idle state to the maximum state is calculated, and the relationship between the radial temperature difference of the disk and time is analyzed. The calculation results show that the radial temperature difference of the disks at all levels occurs between the rim and the slab near the central hole of the disk. During the process of the temperature field stabilizing, the radial temperature difference firstly increases and then decreases. The maximum radial temperature difference increases with the rotor series.