【摘要】 激光法测量两相流是近年来开发的一项新技术，测量过程中需要存在合适的粒子。本文研究了用三维粒子动态分析仪（ＰＤＡ）测量气固两相湍流流场时固体粒子的选择问题。试验过程中，运用几种不同的粒子作为煤粉粒子的模拟粒子进行测量和比较，结果表明：（１）粒子的特性参数是影响测量精度的重要因素之一；（２）测最气固两相湍流流场中粒子的运动特征时，应尽可能选择形状较规则、折射率大、尺寸分布合理、不易粘结且易于收集同时接近所要模拟的粒子性能的固体粒子，必要的时侯应结合粒子性能对测量结果进行修正．更多还原

【Abstract】 The technique of Laser Doppler measurement in fluids depends on th epresence of suitable particles. How to choose the solid particles during gas-solid two-phase turbulent flow field measured by Particle Dynamic Analyzer (PDA) is discussed in this paper. The results show that: (1)Parameters of solid particles are the main factors influencing the measurement results. (2) In the study of gas-solid phase flow by PDA, it is necessary to choose the regular and unliable to conglomerate particles with high refractivc index and uniform distribution of the size.更多还原