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Numerical analysis of erosion wear and pressure drop for turbulent multiphase slurry flow

Kannojiya V., Darshan M. B., Chandra Y. P.

Archive of Mechanical Engineering

2018

Vol. LXV, nr 3

361--378

The disposal of ash in a thermal plant through the slurry pipe is subjected to some erosion wear due to the abrasive characteristics of the slurry. A simulation study of particle-liquid erosion of mild steel pipe wall based on CFD-FLUENT that considers the solid-liquid, solid-solid and solid-wall interaction is presented in this work.The multi-phase Euler-Lagrange model with standard k- ϵ turbulence modeling is adopted to predict the particulate erosion wear caused by the ﬂow of bottom ash water suspension. Erosion rate for diﬀerent particle size and concentration is evaluated at variable ﬂow rate. It is observed that the pressure drop and erosion rate share direct relationships with ﬂow velocity, particle size and concentration. The ﬂow velocity is found to be the most inﬂuencing parameter. A model capable of predicting the erosion wear at variable operating conditions is presented.The simulation ﬁndings show good agreement with the published ﬁndings.