气动疏水阀冲蚀工况数值模拟及结构优化

发布时间：2019-03-30 13:29

【摘要】：采用Eulerian-Lagrangian多相流模型对Y型气动疏水阀的内部流场进行了模拟分析。通过将模拟结果与现场运行的阀门的实际状况进行对比验证了模拟的准确性。研究发现阀门密封处液滴速度大于破坏阈值速度,此处冲蚀损伤严重。为减低阀门冲蚀损伤,提出通过阀内流体中液滴对撞来降低液滴速度方法。基于此思想,在疏水阀密封封面前加装节流套装置。发现液滴速度下降了52%,冲蚀损伤大幅下降且位置远离密封面,但质量流量下降到无节流装置的56.5%。为了提高质量流量,进而提出采用循环对流式迷宫式盘片组件作为阀芯的设计。模拟计算发现阀门液滴最大速度为78.6 m/s,仅为无盘片阀门的46%,同时的质量流量为未加盘片阀门的78.2%。采用循环对流式迷宫式盘片组件作为阀芯的疏水阀适用于冲蚀严重的工况。
[Abstract]:The Eulerian-Lagrangian multiphase flow model is used to simulate the internal flow field of Y-type pneumatic trap. The accuracy of the simulation is verified by comparing the simulation results with the actual situation of the valve running in the field. It is found that the velocity of droplets in the valve seal is greater than the damage threshold velocity, and the erosion damage here is serious. In order to reduce valve erosion damage, a method is proposed to reduce droplet velocity by droplet collision in valve fluid. Based on this idea, a throttle sleeve device is installed in front of the seal cover of the trap valve. It was found that the droplet velocity decreased by 52%, the erosion damage decreased significantly and the location was far away from the sealing surface, but the mass flow rate decreased to 56.5% of the non-throttling device. In order to improve the mass flow rate, the circulating counterflow labyrinth disc module is proposed as the valve core design. The simulation results show that the maximum droplet velocity of the valve is 78.6 m / s, which is only 46% of that of the non-disk valve, and the mass flow rate is 78.2% of that of the non-disk valve. The circulating counterflow labyrinth disc assembly is used as the valve core and the drain valve is suitable for the condition of severe erosion.
【作者单位】：华东理工大学承压系统与安全教育部重点实验室;
【分类号】：TH134

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