DISPERSE SYSTEMS WITH SUSPENDED PARTICLES: THE PROBLEM OF SCALING AND HYDRODYNAMIC-SIMILARITY NUMBERS Yu. S. Teplitskii and V. I. Kovenskii UDC 66.096.5 Within the framework of similarity theory, a rather universal method is developed for generalizing experimental data on the hydrodynamics of a wide class of disperse systems with ascending motion of a gas. This method is based on use of the excess gas velocity u - u*t, which is a measure of the kinetic energy of the particles. Using this quantity, the hydrodynamic-similarity numbers Fr*t and J*s are formulated, which are generalized characteristics of such systems. Specific examples of applying this method are given. JEPTER74920199912 JEPTER7492012