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利用FLUENT磨损模型,模拟研究当固液混合流通过直管道时,不同的固相颗粒速度、粒度和固相浓度对管壁造成的影响。结果表明:管道磨损受速度和粒度的影响均呈非线性关系,受速度的影响较大;当质量浓度为5%~25%时,浓度与管壁的磨损近似为线性关系。模拟分析了3种不同口径管道的磨损区域分布,最大磨损率均出现在管道内壁下表面,磨损区域呈扇状对称分布在管道内壁下侧。根据这一分布特点提出一种换边的方法,可使管道的使用寿命提高3~4倍。
FLUENT wear model was used to simulate the influence of different solid-phase particle velocity, particle size and solid-phase concentration on the pipe wall when the solid-liquid mixed flow was passed through the straight pipe. The results show that the pipeline wear is nonlinearly influenced by the velocity and the particle size, and is greatly affected by the velocity. When the mass concentration is 5% ~ 25%, the wear of the pipeline is approximately linear. The wear area distribution of the three kinds of pipes with different diameters was simulated and analyzed. The maximum wear rate appeared on the lower surface of the inner wall of the pipeline. The wear area was fan-shaped symmetrically distributed on the lower side of the inner wall of the pipeline. According to the characteristics of this distribution proposed a method for changing the edge of the pipe can increase the service life of 3 to 4 times.