New way to reduce wall erosion caused by solid particles

作者：Lin Jian Zhong^*; Wu Fa Li; Yu Zhao Sheng

来源：Tribology, 2003, 23(3): 231-235.

• Critical value
• Numerical calculation
• Particulate flow
• Slot digging
• Turbulence model

It was suggested to reduce the wall erosion caused by particles in a particulate flow by digging slot in the wall. Thus the improved κ-Ε turbulence model and the two-way coupling method were used to calculate the particle velocities and trajectories, and the wall erosion rate caused by particle impact. The calculated result was verified by its comparison with the corresponding experimental one. As a result, the calculated result agreed well with the experimental one. The wall erosion which is attributed to the particle impact was significantly decreased by digging the streamwise slot in the wall. At a fixed slot height, the reduction of the erosion rate was significant when the slot width was almost identical to the gap between two slots. Within a certain region of the particulate size, larger particles led to higher erosion rate of the wall, while at a particle size exceeding a critical value, the erosion rate of the wall had little dependence on the particle size. Moreover, the erosion rate of the wall was closely related to the initial inlet angle of the particles.

• 出版日期2003
• 单位浙江大学