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主要研究湍流强度对航空发动机轴心通风器分离效率的影响。采用计算流体力学(CFD)的方法对轴心通风器内部流场进行模拟,获得了内部流场的湍流强度等参数,并计算了通风器的油气分离效率。由于流场的复杂性,决定了很难得到分离效率受流场参数影响的规律。而相关性分析给我们提供了一种方法。应用线性回归理论对数据进行分析,得到回归方程。根据回归分析的结果可知,各组数据的分析结果均具有正相关性。通风器内腔段和通风管段分离效率随湍流强度的增加而不同程度增加。通风器内腔段分离效率受湍流强度影响明显,而通风管分离效率受湍流强度的影响不明显。所得结论可为轴心通风器结构优化提供参考。
The main research turbulence intensity of aero-engine axial fan separation efficiency. The CFD method was used to simulate the internal flow field of the axial ventilator. The turbulence intensity and other parameters of the internal flow field were obtained and the efficiency of the oil and gas separation was calculated. Due to the complexity of the flow field, it is difficult to obtain the rule that the separation efficiency is affected by the flow field parameters. The correlation analysis gives us a way. The linear regression theory is used to analyze the data to get the regression equation. According to the results of regression analysis, we can see that the results of each group of data analysis have a positive correlation. The separation efficiency of ventilator inner chamber section and ventilation duct section increases with the increase of turbulence intensity. The separation efficiency of ventilator cavity section is affected by turbulence intensity obviously, but the separation efficiency of ventilating pipe is not obvious influenced by turbulence intensity. The conclusion can provide a reference for the structural optimization of axial ventilator.