首页|(105902)The effect of excessive penetration of welding on sand erosion pattern due to high speed gas-solid flows in elbows and reducers
(105902)The effect of excessive penetration of welding on sand erosion pattern due to high speed gas-solid flows in elbows and reducers
扫码查看
点击上方二维码区域，可以放大扫码查看
原文链接
NSTL
Elsevier
The aim of the current study is to investigate the effect of excessive penetration of welding and natural gas impurity particles on increasing erosion in elbows and reducers. To this end Euler-Lagrange model is used to simulate the two-phase solid-gas flow, the Discrete Phase Model (DPM), k-e turbulent model and DNV erosion model are used to model the solid particles, natural gas flow and erosion rate, respectively. Erosion in elbows occurs downstream of vertical welding while in reducers is weaker and occurs at the inlet. The results show that erosion rate increases by increasing excessive penetration, particles size, particles flow rate and natural gas flow rate. The effect of excessive penetration becomes more important in high speed flows containing solid particles, in such a way that reducing excess penetration from h = 3 mm to h = 0 mm, causes 45% reduction in erosion rate in elbows containing 20 m/s natural gas flows. Therefore, for high velocity impure gas flows, it is recommended to reduce the allowable excessive penetration in welding standards.
ErosionEuler-Lagrange approachBlack powderExcessive penetrationNatural gas
F. Hosseini、A.H. Meghdadi Isfahani、M. Davazdah Emami
展开 >
Department of Mechanical Engineering, Najafabad Branch, Islamic Azad University, Najafabad, Iran
Department of Mechanical Engineering, Isfahan University of Technology, Isfahan, Iran
NSTL
Elsevier
