Measured headlosses for potatoes transported in 9.5-inch-diameter horizontal and vertical pipes were compared with mathematically predicted headlosses. Measured and predicted headlosses agreed well when the predictions were made with equations that had been developed for the heterogeneous flow of sand and coal particles. Flow profiles were analyzed for potatoes transported in metal flumes with various cross sections and slopes. Manning roughness coefficient could be estimated with a form of an equation published for the heterogeneous flow of sand. Potato concentrations were varied and potato handling rates were varied from 780 to 1,800 pounds per minute in the trials conducted. Design criteria for pipelines and flumes were developed.
Record Identifier
https://ageconsearch.umn.edu/record/337131
Language
English
Total Pages
60
Note
The term "hydraulic transport" refers to the process of conveying solid materials by water flowing through a flume or pipeline. When this process occurs in an open channel, it is called fluming; when it occurs in a pipe, it is called pipelining. In open channel flow the liquid stream is not completely enclosed by solid boundaries and thus has a free surface subjected only to atmospheric pressure. In pipe flow the fluid completely fills the pipe and has no free surface. Hydraulic transport is especially convenient for moving solids, such as agricultural products, that require washing. Since the density of most agricultural produce is near that of water, suspending them in a moving stream is fairly easy. Sugar beets and potatoes are two products for which pipelining or fluming is frequently used to serve as a means both of washing and conveying.
