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三维粒子动态分析仪（３－ＤｉｍｅｎｓｉｏｎａｌＰａｒｔｉｃｌｅＤｙｎａｍｉｃＡｎａｌｙｚｅｒ）是利用激光多普勒频移原理，来测量两相流动中球形粒子的速度、粒径、浓度等参数，从而进一步得到三维湍流流动中粒子动态特性的一种激光测速设备。在其采集过程中自动建立的数据文件是以二进制形式存贮的，而且记录的都是每个球形粒子的信息，不能直接求平均及湍流计算。本文给出了处理这些数据的基本方法，通过编制的Ｃ语言程序得到各测点所通过的粒子数、三维速度、湍流特性以及相对体积流量，为ＰＤＡ数据软件的进一步利用与开发提供了很大的方便。
The 3-Dimensional Particle Dynamic Analyzer uses the laser Doppler shift principle to measure parameters such as velocity, particle size, and concentration of spherical particles in a two-phase flow, thereby obtaining a Laser speed measuring equipment. The data files created automatically during their acquisition are stored in binary form and the information for each spherical particle is recorded and can not be directly averaging and turbulence calculations. In this paper, the basic method of processing these data is given. The number of particles, the three-dimensional velocity, the turbulent flow characteristics and the relative volume flow rate obtained from the C language program are obtained through the compilation of the C language program, which provides great advantages for the further utilization and development of PDA data software Convenient.