SUBSONIC GAS-PARTICLE TWO-PHASE FLOW IN PIPES

摘要

A mathematical model for subsonic two-phase flow in pipes is presented. The model takes into account the momentum and heat transfer between the gas and the particle phases. The wall surface roughness and the coupling effect are also considered. In addition effects of loading coefficient and particle diameter on the subsonic and choked flow behaviour of gas-solid flow are investigated. The present study covers three separate cases firstly the case of no heat transfer (adiabatic flow), secondly the case of heat transfer (heating flow) and the third one is the case of heat transfer (cooling flow). The three cases are studied for equal gas and particle temperatures and also in the case of hot particle and cold gas. Results of present predictions are compared with the published data and a reasonable degree of agreement is obtained. The validation has proved that the present model adequately predicts the basic flow parameters in many aspects of the flow of gas-solid mixtures at low and high speeds.