Derivation of Predicted Pressure Drop Equation on Granular Particle Plug Transportation in Horizontal Pipe (High Adaptability for Kinds of Particle and Pipe Diameter)

• Published in: Nihon Kikai Gakkai rombunshuu. B hen Vol. 19; no. 9; pp. 1868 - 1875
• Main Authors: Kofu, Kenji, Ochi, Mitsuaki, Takei, Masahiro
• Format: Journal Article
• Language: Japanese
• Published: 01.09.2007
• ISSN: 0387-5016

In a plug transportation that is one of gas-solid two-phase flow, the predicted equations on particle velocity within a plug and pressure drop in a horizontal pipe have been formulated. The agreement between values calculated by these equations and experiments that changed solid-air mass flow rate, pipe diameter, kinds of particle was obtained. The error between them is almost within 10%. In order to confirm the validity of supposition to derive these equations, particle velocity distribution within a plug in the directions of flow and radius, and particle velocity transformation from a stationary bed to a plug have been analyzed by high speed camera and PIV. As a result, there is no particle velocity distribution in a plug, and particles are accelerated uniformly in extra part of a plug. Particles in a plug are fixed relative to each other and so they all move with the same velocity.