H. Jin, H. Xiang, M. Wang, R. Wen, X. Liu, C. Wang
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引用次数: 0
摘要
高压黑水角阀是煤气化过程中黑水闪蒸处理系统的重要设备,通常具有很高的冲蚀磨损失效风险。本研究采用计算流体动力学(CFD)方法,结合离散粒子法(DPM)和流体体积法(VOF),研究了高压黑水角阀在不同阀腔半径和开启角度下的流动特性和冲蚀磨损现象。其中,引入了一个新参数--漂移指数,用于分析节流区的偏流现象。随着阀腔半径的增大,漂移指数先减小后增大,并且随着阀门开度的增大,阀腔半径的影响逐渐减弱。研究发现,随着阀腔半径的增大,阀体的平均冲蚀磨损率先减小后增大。当阀腔半径为 132 mm 时,阀体的平均冲蚀磨损率最小。因此,优化阀腔半径选择值可以减少高压黑水角阀的冲蚀磨损破坏,提高其运行可靠性。
Numerical Study of Erosion Wear Characteristics in a High-pressure Black Water Angle Valve by Using CFD-VOF-DPM Method
High-pressure black water angle valves are essential equipment of black water flash treatment systems in the coal gasification process, and they usually suffer from a high risk of erosion wear failure. In this study, computational fluid dynamics (CFD), combined with the discrete particle method (DPM) and the volume of fluid (VOF) method, was used to study the flow characteristics and erosion wear phenomenon in high-pressure black water angle valves under different valve cavity radii and opening angles. In particular, a new parameter, the drift index, was introduced to analyze the bias flow phenomenon in the throttling zone. With the increase in valve cavity radius, the drift index first decreases and then increases, and the influence of the valve cavity radius gradually weakens with the increase in the valve opening. It was found that, with the increase in valve cavity radius, the average erosion wear rate of the valve body decreases first and then increases. When the valve cavity radius was 132 mm, the average erosion wear rate of the valve body was the smallest. Therefore, the optimization of the valve cavity radius selection value can reduce the erosion wear damage of the high-pressure black water angle valve and increase its operational dependability.
期刊介绍:
The Journal of Applied Fluid Mechanics (JAFM) is an international, peer-reviewed journal which covers a wide range of theoretical, numerical and experimental aspects in fluid mechanics. The emphasis is on the applications in different engineering fields rather than on pure mathematical or physical aspects in fluid mechanics. Although many high quality journals pertaining to different aspects of fluid mechanics presently exist, research in the field is rapidly escalating. The motivation for this new fluid mechanics journal is driven by the following points: (1) there is a need to have an e-journal accessible to all fluid mechanics researchers, (2) scientists from third- world countries need a venue that does not incur publication costs, (3) quality papers deserve rapid and fast publication through an efficient peer review process, and (4) an outlet is needed for rapid dissemination of fluid mechanics conferences held in Asian countries. Pertaining to this latter point, there presently exist some excellent conferences devoted to the promotion of fluid mechanics in the region such as the Asian Congress of Fluid Mechanics which began in 1980 and nominally takes place in one of the Asian countries every two years. We hope that the proposed journal provides and additional impetus for promoting applied fluids research and associated activities in this continent. The journal is under the umbrella of the Physics Society of Iran with the collaboration of Isfahan University of Technology (IUT) .