示踪粒子特性对于PIV试验研究至关重要，进而影响流场分布的准确性。通过建立示踪粒子运动的数学模型，分析了四种示踪粒子跟随性，确定出比较适合模拟流场的示踪粒子，并在双级径向旋流燃烧室中进行了PIV试验验证与分析。结果表明：通过理论计算，四种粒子均满足流场跟随性的要求，面粉跟随性好于其它三种示踪粒子；通过选用四种示踪粒子燃烧室头部流场的PIV试验，四种粒子均满足燃烧室流场跟随性要求，并较好地显示了流场流动特点，但面粉跟随性好于其它三种示踪粒子，说明通过对示踪粒子所建立数学模型的简化，能够较好反映出双级旋流燃烧室头部流场的跟随性。

The characteristics of the tracer particles are very important for the PIV test research，at the same time，the accuracy of the flow field distribution is affected.Four kinds of tracer particles，starch，flour，gesso powder and Al2O3 powderhad been selected. By establishing a mathematical model of the tracer particle movement，the followingperformance of four kinds of tracer particles had been analyzed，and confirmed which kind of tracer particles waswell suitable for simulating the flow field，and PIV experiment is verified and analyzed in the two stage radial swirl combustion chamber.The research results show that: through theoretical calculations，the four kinds of particles are all able to meet the tracing requirements of the flow field simulation，but the following performanceof the flour is better than the other three kinds of tracer particles; through the PIV experimentsin the head flow field of the dual stage swirl combustor for four kinds of particles，compared with the other three kinds of tracer particles，the flour can better show the flow characteristics of the head flow field in the dual stage swirl combustor. It also turns out that through the simplification of the mathematical model of the tracer particles，the following characteristics of the head flow field of the dual stage swirl combustion chamber can be well reflected.