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dc.rights.licenseRestricted to current Rensselaer faculty, staff and students. Access inquiries may be directed to the Rensselaer Libraries.
dc.contributor.authorPinkus, Oscar
dc.date.accessioned2021-11-03T09:04:51Z
dc.date.available2021-11-03T09:04:51Z
dc.date.created2018-10-24T13:34:56Z
dc.date.issued1951-06
dc.identifier.urihttps://hdl.handle.net/20.500.13015/2271
dc.descriptionJune 1951
dc.descriptionSchool of Engineering
dc.description.abstractIt was found that the presence of the solid phase causes an appreciable pressure loss in the pipe. This pressure loss is a linear function of both, solid and gas flow rate. This justified the theoretical equations which predicted such a relationship.
dc.description.abstractRecommendations for further investigation are made.
dc.description.abstractFollowing results of this work it would seem desirable to operate pneumatic systems at low gas velocities and high solid rates. However upper and lower limits were found to exist in such an attempt. At very low solids rates instability sets in followed by strong pressure surges. At high solids rates a settling tendency was observed with nonuniformity in the flow
dc.description.abstractOn the basis of this investigation it is concluded that the drag coefficient C is a function of Reynolds number and is independent of the behavior of the fluid. The ratio of solids velocity to the a velocity is 0.5 - 0.6 for the small sand and 0.3 for the large sand.
dc.description.abstractExperiments vd.th the two sizes of sand showed a higher pressure drop for the larger particles, other conditions being equal. The solids velocity was lower for the larger diameter. These experiments, however, question the validity of using the Fanning equation in its application to a solid phase. The equation holds for a given solid but does not take into account variations in its size. The introduction of the dimensionless group d/D is proposed
dc.description.abstractWith the object of studying the characteristics of the horizontal flow of a mixture of solids and air a theoretical analysis of the flow pattern was attempted. Experiments were performed whose object was, first, to deter.mine the relationship between pressure loss, solids flow rate and air velocity, and secondly to obtain values for frictional constants involved in the analysis. A justification for the developed equations was sought.
dc.description.abstractA limitation in this work was the inability to measure directly the solids velocity. Equations were developed for this purpose. Two sizes of the same kind of sand were used.
dc.language.isoENG
dc.publisherRensselaer Polytechnic Institute, Troy, NY
dc.relation.ispartofRensselaer Theses and Dissertations Online Collection
dc.subjectMechanical engineering
dc.titlePressure drops in the pneumatic conveyance of solids by gases
dc.typeElectronic thesis
dc.typeThesis
dc.digitool.pid179262
dc.digitool.pid179263
dc.digitool.pid179264
dc.rights.holderThis electronic version is a licensed copy owned by Rensselaer Polytechnic Institute, Troy, NY. Copyright of original work retained by author.
dc.description.degreeMS
dc.relation.departmentDept. of Mechanical Engineering


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