THE APPLIED PRINCIPLE AND EXPERIMENTAL METHOD OF L2F VELOCIMETRY IN HIGH TURBULENT INTENSITY AND PARTICLE DENSITY FLUID

Ⅰ. INTRODUCTION Laser dual focus (L2F) velocimetry is a non-Doppler velocimetry which has been developed in recent years and shown to be superior to LDV in some situations. The comprehensive review has been presented by Smart et al. The measuring informations come from the scattering light pulses of particles which embed in the fluid