用粒子动态分析仪研究水力旋流器内固体颗粒运动规律

粒子动态分析仪(PDA)是一种新型的激光测量仪器,可用于两相流中粒子运动规律的实测研究。本文用PDA对一个80mm的透明水力旋流器内固粒的运动规律进行了测定,根据其结果提出了内旋流中的颗粒仍可能被重新分离,固粒绝对浓度最大值发生在零轴速包络面处等一些新观点,并指出过去被认为是经典理论的“平衡轨道理论”需加以修正。

A STUDY OF THE MOTION BEHAVIOUR OF SOLID PARTICLES IN A HYDROCYCLOHE BY P.D.A.

A particle dynamic analyser (P.D.A.) is a new type of laser measuring instrument for surveying the motion behaviour of particles in two-phase flow. The authors study the motion bchaviour of solid particles in an 80 mm transparent hydrocyclone with it. According to the tcsting results, they put forward somc ncw points: 1)there is still a chance for some particles to be sep- arated again in inner helical flow; 2)the maximum absolute concentration of solid particles occurs on the enveloping surface of zero vertical velocity. Finally, the authors point out that the equilibrium orbit theory, which was considered as a classical theory, should be modified.