Measurements of particle diameter and its location by inline laser-holography

Abstract

In the gas atomization method, the molten metal is atomized by supersonic freejets. However, the breakup process of the melted metal droplet is not known. In the present research, the diagnostic system based on the inline laser-holography is constructed to clarify the process of gas atomization. This method determines the size and location of a droplet by comparing the hologram pattern obtained by experiments with that by the theory. Previous works used the first and the second extrema of the hologram pattern for the particle sizing. However, it is found that the accuracy can be improved by considering the third extremum.