同武军,王莹莹,鞠少栋,李兴业,王星,王宝富,韦琦.笼套式水下节流阀冲蚀特性与寿命预测研究[J].表面技术,2025,54(5):116-127.
TONG Wujun,WANG Yingying,JU Shaodong,LI Xingye,WANG Xing,WANG Baofu,WEI Qi.Erosive Characteristics and Service Life Prediction of Subsea Cage-type Choke Valve[J].Surface Technology,2025,54(5):116-127 |
| 笼套式水下节流阀冲蚀特性与寿命预测研究 |
| Erosive Characteristics and Service Life Prediction of Subsea Cage-type Choke Valve |
| 投稿时间：2024-04-30 修订日期：2024-09-02 |
| DOI：10.16490/j.cnki.issn.1001-3660.2025.05.009 |
| 中文关键词: 水下节流阀 冲蚀特性 流固耦合 数值模拟 FLUENT 寿命预测 |
| 英文关键词:subsea choke valve erosion characteristics fluid-structure coupling numerical simulation FLUENT life prediction |
| 基金项目:国家自然科学基金面上项目(52374022);1 500米级水下采油树及控制系统研制专项经费 |
| 作者 | 单位 |
| 同武军 | 中国石油大学北京 安全与海洋工程学院，北京 102249;中海油能源发展股份有限公司工程技术分公司，天津 300450 |
| 王莹莹 | 中国石油大学北京 安全与海洋工程学院，北京 102249 |
| 鞠少栋 | 中海油能源发展股份有限公司工程技术分公司，天津 300450 |
| 李兴业 | 中国石油大学北京 安全与海洋工程学院，北京 102249 |
| 王星 | 中海油能源发展股份有限公司工程技术分公司，天津 300450 |
| 王宝富 | 中海油能源发展股份有限公司工程技术分公司，天津 300450 |
| 韦琦 | 中国石油大学北京 安全与海洋工程学院，北京 102249 |
|
| Author | Institution |
| TONG Wujun | College of Safety and Ocean Engineering, China University of Petroleum Beijing, Beijing 102249, China;CNOOC Energy Development Co., Ltd., Engineering Technology Division, Tianjin 300450, China |
| WANG Yingying | College of Safety and Ocean Engineering, China University of Petroleum Beijing, Beijing 102249, China |
| JU Shaodong | CNOOC Energy Development Co., Ltd., Engineering Technology Division, Tianjin 300450, China |
| LI Xingye | College of Safety and Ocean Engineering, China University of Petroleum Beijing, Beijing 102249, China |
| WANG Xing | CNOOC Energy Development Co., Ltd., Engineering Technology Division, Tianjin 300450, China |
| WANG Baofu | CNOOC Energy Development Co., Ltd., Engineering Technology Division, Tianjin 300450, China |
| WEI Qi | College of Safety and Ocean Engineering, China University of Petroleum Beijing, Beijing 102249, China |
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| 中文摘要: |
| 目的 针对水下节流阀在携砂油气冲蚀下被破坏现象展开研究，揭示携砂油气冲蚀对水下节流阀不同位置的影响规律，为优化设计和提升水下采油树的安全性和可靠性提供理论依据，保障油气生产过程的稳定性和连续性。方法 使用CFD数值仿真软件，采用欧拉-拉格朗日(Eulerian-Lagrangian)流固耦合方法，针对携砂油气冲击节流阀内壁展开数值模拟研究，通过控制单一影响因素(如颗粒直径、油流速度、颗粒质量流量、节流阀开度等)，揭示笼套式水下节流阀在不同影响因素下的冲蚀变化规律，并预测极端工况下水下节流阀的冲蚀使用寿命。结果 笼套式水下节流阀的冲蚀主要发生在节流孔附近壁面(笼套护套、阀芯壁面的节流孔附近)和节流孔内壁面位置，且随着颗粒直径的增大，冲蚀率逐渐降低;随着油流速度和颗粒质量流量的增大，冲蚀率呈递增趋势;随着节流阀开度的增大，冲蚀率呈递减趋势;在最极端工况下，取1.5倍安全系数，水下节流阀节流孔的使用年限最低可达11 a。结论 通过数值模拟与理论计算相结合的方法预测了水下节流阀的冲蚀寿命，提出了一种工程计算的方法和思路，从而保障水下采油树工作时的安全性和可靠性，以期为实际工程起到一定指导作用。 |
| 英文摘要: |
| This article aims to study the erosion levels at different positions inside a cage-type subsea choke valve under the influence of various factors, based on the Eulerian-Lagrangian fluid-solid coupling numerical simulation method, so as to identify the most severely eroded areas inside the subsea choke valve and predict its service life based on this analysis. To address the erosion issue caused by fine particles inside the subsea choke valve, this study conducts numerical simulations by Ansys Fluent software. The Standard k-ε turbulent model and Discrete Phase Model within the software are utilized for coupled analysis of the solid-liquid two-phase flow. By controlling variables such as particle velocity, particle mass flow rate, particle diameter, choke valve opening, etc., the study observes the influence of different factors on internal erosion of the cage-type subsea choke valve, to reveal the erosion patterns inside the subsea choke valve. Furthermore, the Oka model within the software is used for erosion damage prediction. The valve core and cage sleeve of the cage-type subsea choke valve analyzed in this study are made of tungsten carbide hard alloy (YG8), with a Vickers hardness of up to 13.7 GPa. Innovative consideration is given to material density, hardness, and other properties of components like the valve core in the analysis, fully integrating them with the Oka erosion model to establish a set of erosion model parameters suitable for the cage-type subsea choke valve used in this study. With the variation of particle velocity within a certain range, increasing from 0.165 m/s to 0.293 m/s, the overall maximum erosion rate of the subsea choke valve is positively correlated with the particle velocity. As the particle velocity increases, the kinetic energy carried by the particles themselves increases, leading to a greater impact on the inner wall of the subsea choke valve. When changing the diameter size of the particles, analysis on the erosion situation of the choke valve with four particle diameters (99, 150, 200, 268 μm) found that as the particle diameter increases, the overall maximum erosion rate of the valve shows a decreasing trend. At constant total volume and mass flow rate of particles, as the particle diameter increases, the number of particles carried by the primary phase fluid decreases, resulting in a lower level of particle impact on the surface, causing the erosion rate to decrease with the increase of particle diameter. When continuously changing the mass flow rate of particles from 1.11 g/s to 1.96 g/s, the maximum erosion rate of the valve continuously increases. With the other parameters unchanged, increasing the mass flow rate of particles leads to a greater number of particles and more impacts on the surface per unit time, resulting in a continuous increase in erosion rate. When changing the opening of the throttling orifice of the subsea choke valve from 10% to 100%, the overall maximum erosion rate of the subsea choke valve continuously decreases. This is because, under constant flow rate conditions, the increase in flow area leads to a decrease in the primary phase flow velocity, similar to the effect of changing particle velocity. By analyzing the above factors affecting the cage-type subsea choke valve, it is found that the main locations of erosion concentrate on the surfaces near the throttling holes of the cage sleeve and the throttling holes of the valve core. Therefore, predicting the service life of the cage-type subsea choke valve based on the erosion rates of the surfaces near the throttling holes of the cage sleeve and the valve core can effectively ensure the safety and reliability of subsea Christmas tree operations. Predicting the service life of the cage-type subsea choke valve under extreme oil and gas conditions is a conservative analytical approach. By controlling the maximum particle velocity, the particle mass flow rate, and setting the throttle orifice opening to 20%, conducting erosion analysis on the cage-type subsea choke valve, the shortest estimated service life of the cage-type subsea choke valve is predicted to be 17 years. Within these 17 years, the subsea choke valve will not experience wall penetration due to erosion, thereby avoiding functional damage. |
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