INFLUENCE OF SOLID INCLUSIONS IN LIQUID DROPS ON EVAPORATION INTENSITY IN THE FLAME

The article presents scheme, technique and experimental investigation results of containing in water drops solid inclusions (nonmetallic and metal particles) influence on sizes changes, decrease of liquid weight and the evaporation intensity at movement through the flame zone. The modern high-speed measuring system of two-phase vapor-liquid streams diagnostics on the basis of Particle Image Velocimetry (PIV) and Interferometric Particle Imaging (IPI) optical methods is used for the recording and processing of video frames. It is established that the measurement errors of liquid droplet sizes amounted to 0.001 mm. Video frames of the drops containing solid inclusions in the form of carbon particles of the fixed sizes (50500)·10–6 m are provided. Limit changes of the drops sizes at movement through a flame are established. Influence of solid particles in liquid drops on completeness of their evaporation at moving through the flame with fixed height is analyzed. Dependences of the evaporated liquid share on concentration and the sizes of containing in it solid particles for water drops with sizes of 3 mm are presented. It is established that for achievement of liquid drops crushing in a flame zone the sizes of entering into their structure solid particles have to vary within 50–70 % from the drops sizes. It is shown that for intensification of liquids evaporation in a flame zone is expediently specialized introduction to its structure of solid inclusions