论文信息 - SUBSONIC GAS-PARTICLE TWO-PHASE FLOW IN PIPES

SUBSONIC GAS-PARTICLE TWO-PHASE FLOW IN PIPES

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.

Mofreh H. Hamed | M. Hamed

[1] W. Reynolds,et al. Thermodynamic properties in SI: Graphs, tables, and computational equations for forty substances , 1979 .

[2] Haim Kalman,et al. Model for dilute gas–particle flow in constant-area lance with heating and friction , 2000 .

[3] Avi Levy,et al. Drying of wet solid particles in a steady-state one-dimensional flow , 1998 .

[4] Avi Levy,et al. Steady state one dimensional flow model for a pneumatic dryer , 1999 .

[5] John B. McLaughlin,et al. Thermophoretic deposition of small particles in a direct numerical simulation of turbulent channel flow , 1998 .

[6] Seung Wook Baek,et al. THERMOPHORESIS OF PARTICLES IN GAS-PARTICLE TWO-PHASE FLOW WITH RADIATION EFFECT , 2000 .

[7] L. Browne. Deposition of particles on rough surfaces during turbulent gas-flow in a pipe , 1974 .

[8] Goodarz Ahmadi,et al. Gas–particle two-phase turbulent flow in horizontal and inclined ducts , 2000 .

[9] D. Georgiou,et al. A relative examination of CD-Re relationships used in particle trajectory calculations , 1993 .

[10] Dmitry Eskin,et al. Modeling dilute gas–particle flows in horizontal channels with different wall roughness , 2005 .

[11] M. Sommerfeld,et al. EXPERIMENTAL STUDIES AND MODELLING OF FOUR-WAY COUPLING IN PARTICLE-LADEN HORIZONTAL CHANNEL FLOW , 2002, Proceeding of Second Symposium on Turbulence and Shear Flow Phenomena.