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Nizhnekamsk, Russia

Laptev A.G.,Kazan Federal University | Farakhov M.I.,Inzhekhim Engineering Implementation Center | Basharov M.M.,TANEKO Company
Chemical and Petroleum Engineering

Fundamental problems involving ethylene production and means of their solution are examined. New contact packings and structured contact trays are presented for use in gas-separation units for modernization of tower equipment, and in gas separators (oil catchers). © 2014 Springer Science+Business Media New York Source

Laptev A.G.,Kazan State Power Engineering University | Basharov M.M.,TANEKO Company
Journal of Engineering Physics and Thermophysics

Semiempirical approaches to the determination of the average coefficients of heat transfer from rough surfaces of channels are considered. The expressions obtained on the basis of the boundary-layer models of Prandtl, Deissler, Hanratty, and von Kármán are given. The possibility of calculating the parameters of these expressions with account for the channel surface roughness is shown. A comparison of the results of calculations of Nusselt numbers for rough channels from the obtained formulas with calculations by the familiar formulas and with corresponding experimental data is made. A generalizing expression for rough channels has been obtained. © 2015 Springer Science+Business Media New York Source

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