Maqolada turli xil polidispers donador materiallarning mavhum qaynayotgan qatlamlarining strukturasiga doir eksperimental tadqiqotlar natijalari keltirilgan. Mavhum qaynayotgan qatlamlarning kengayish darajasiga zarrachalarning o'lchami va materialining zichligi sezilarli ta'sir ko'rsatishi o'rnatilgan. Qaynayotgan qatlam strukturasi bo'yicha olingan tajriba ma'lumotlari ko'pchilik uchun ma'lum bo'lgan tenglamalar hisoblarining natijalariga mos kelishi qayd etilgan.

Tayanch iboralar: issiqlik va modda o'tkazish, diametr, zichlik, mavhum qaynash holati, mavhum qaynayotgan qatlamlarining kengayishi, g'ovaklik, zarrachalarning shakli, mavhum qaynash soni, qarshilik, qatlam usti maydoni, taqqoslash.

The results of experimental studies on the structure of fluidized bed of polydisperse granular material. Substantial effect of particle size and density of the material on the expansion ratio of fluidized beds. It is noted that the obtained experimental data on the structure of the fluidized bed according to the result of calculations by the well-known equations.

Key words: heat transfer and mass, diameter, density, fluid bed, fluidized bed expansion, porosity, particle shape,number fluidization resistance subsurface space, comparison.