Effect of placements (horizontal with vertical) on gas-solid flow and particle impact erosion in gate valve
Effect of placements (horizontal with vertical) on gas-solid flow and particle impact erosion in gate valve
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DOI：
10.1007/s11630-014-0741-3
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发表时间：
2014-11
影响因子：
2.5
通讯作者：
Zhe Lin;Linhang Zhu;B. Cui;Yi Li;X. Ruan
中科院分区：
文献类型：
--
作者：
Zhe Lin;Linhang Zhu;B. Cui;Yi Li;X. Ruan
闸阀在实际使用中有不同的位置。由于重力的影响，粒子的轨迹和侵蚀在不同的位置是不同的。因此，本研究采用欧拉-拉格朗日模拟方法，对水平布置和垂直布置闸阀的气固流动特性和冲蚀进行了讨论和比较。研究了闸阀的结构和简化结构。通过与管道和弯头的实验数据进行对比，验证了仿真方法的正确性。结果表明，对于所有研究的开度和斯托克斯数（St），两种布置的气体流动特性和流动系数差异不大。两种位置的粒子轨迹在St«1时基本相同，使得侵蚀与放置无关。随着St的增大，位置之间的轨迹差异越来越明显，导致侵蚀分布的差异越来越大。此外，当粒径为250μm时，水平放置时表面T的总侵蚀比垂直放置时大2个数量级。
Gate valve has various placements in the practical usages. Due to the effect of gravity, particle trajectories and erosions are distinct between placements. Thus in this study, gas-solid flow properties and erosion in gate valve for horizontal placement and vertical placement are discussed and compared by using Euler-Lagrange simulation method. The structure of a gate valve and a simplified structure are investigated. The simulation procedure is validated in our published paper by comparing with the experiment data of a pipe and an elbow. The results show that for all investigated open degrees and Stokes numbers (St), there are little difference of gas flow properties and flow coefficients between two placements. It is also found that the trajectories of particles for two placements are mostly identical when St « 1, making the erosion independent of placement. With the increase of St, the distinction of trajectories between placements becomes more obvious, leading to an increasing difference of the erosion distributions. Besides, the total erosion ratio of surface T for horizontal placement is two orders of magnitudes larger than that for vertical placement when the particle diameter is 250μm.