本文使用本征正交分解方法(POD)对雷诺数Re=14500,喷嘴间距L/d=5、12的气固两相撞击流进行了PIV实验研究,颗粒相采用平均直径100 μm的玻璃珠,质量载荷Φm=2％.研究结果表明:两种间距下撞击流的1阶模态结构相似,为分布在撞击中心两侧径向上的反向涡对结构;其他阶(2～4)模态结构为径向射流上的由主导涡诱导形成的一组涡系结构;颗粒的加入增强了轴向射流区轴向湍流脉动结构,破坏了撞击流有规律的涡系结构.
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