AUGER DESIGN FOR UNIFORM UNLOADING OF GRANULAR MATERIAL .1. CYLINDRICAL CONTAINERS

The analysis presented can be used to determine the design equations f or augers that produce uniform vertical flow of granular material thro ugh containers with cylindrical cross-sections. The augers so designed have a constant outside diameter and a variable root or shaft diamete r. installed in cylindrical grain bins they could be used to convert a batch-in-bin dryer to a continuous flow dryer. The analysis is an ext ension of the work of Jones and Kocher (1995) who designed and tested such an auger for containers of rectangular cross-section, and determi ned flow to be uniform for practical purposes. The analysis follows th e same concept used by Shivvers (1973) to develop augers with variable outside diameter to provide uniform vertical flow of granular materia l through containers with cylindrical cross-section.