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双旋流杯具有良好的综合燃烧性能,在航空发动机燃烧室中已获得广泛应用。但其在装配过程中不可避免地会出现细微的安装误差,为了研究这些细微误差是否会对燃烧性能产生影响,需要更细致地研究双旋流杯局部结构和气动特征对下游流场的影响作用。因此,本文在常温常压条件下采用粒子图像测速(PIV)技术测试了双旋流杯下游冷态流场,探究一级旋流偏置对反向双旋流杯下游流场的影响规律。结果表明,随着一级旋流偏置距离的增加,在无量纲偏置量下游流场无变化,而当继续增加一级旋流的偏置距离时,下游流场会出现明显的偏移,这对旋流器的安装调试提供了参考。
Double swirl cup has a good overall combustion performance, in the aero-engine combustion chamber has been widely used. However, it is inevitable to have slight installation errors in the assembly process. In order to investigate whether these slight errors will affect the combustion performance, the effect of the local structure and aerodynamic characteristics of the double swirl cup on the downstream flow field needs to be studied in more detail . Therefore, this paper tests the cold flow field downstream of the double swirl cup by particle image velocimetry (PIV) under normal temperature and pressure, and studies the influence of the first-class swirl bias on the flow field downstream of the double swirl cup. The results show that there is no change in the flow field at the non-dimensional offset with the increase of the offset of the first-order swirl flow. However, when the bias distance of the first-order swirl flow continues to increase, the downstream flow field will have a significant offset , Which provides a reference for the installation and debugging of the cyclone.