非圆弯头冲蚀磨损数值模拟

doi:10.11902/1005.4537.2024.332

中国腐蚀与防护学报

2025, Vol. 45

Issue (5): 1425-1432 CSTR: 32134.14.1005.4537.2024.332 DOI: 10.11902/1005.4537.2024.332

研究报告

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非圆弯头冲蚀磨损数值模拟

闫冲冲¹^,², 谢光明¹^,², 华剑¹^,²(

), 曾云¹^,², 周思柱¹^,², 余泽坤¹^,²

1 长江大学机械工程学院荆州 434023
2 长江大学机械结构强度与振动研究所荆州 434023

Numerical Simulation of Erosion Wear on Non-circular Elbows

YAN Chongchong¹^,², XIE Guangming¹^,², HUA Jian¹^,²(

), ZENG Yun¹^,², ZHOU Sizhu¹^,², YU Zekun¹^,²

1 School of Mechanical Engineering, Yangtze University, Jingzhou 434023, China
2 Mechanical Structures Strength and Vibration Research Institute, Yangtze University, Jingzhou 434023, China

引用本文:

闫冲冲, 谢光明, 华剑, 曾云, 周思柱, 余泽坤. 非圆弯头冲蚀磨损数值模拟[J]. 中国腐蚀与防护学报, 2025, 45(5): 1425-1432.
Chongchong YAN, Guangming XIE, Jian HUA, Yun ZENG, Sizhu ZHOU, Zekun YU. Numerical Simulation of Erosion Wear on Non-circular Elbows[J]. Journal of Chinese Society for Corrosion and protection, 2025, 45(5): 1425-1432.

全文: PDF(9375 KB) HTML

摘要:

为减小普通弯头的冲蚀，提出一种非圆弯头。基于气固两相流理论，利用Fluent软件对非圆弯头流场进行分析，优化出抗冲蚀性较好的非圆弯头，并研究流速、质量浓度、颗粒直径3种因素对弯头冲蚀的影响。结果表明：长半轴(b)位于5.0~10.0、20.0~37.5时的非圆弯头具有抗冲蚀性，其中b = 30.0时抗冲蚀性最好，较普通弯头提高17.71%。非圆弯头和普通弯头的最大冲蚀速率随3种因素的增大递增，其中流速的影响最大。不论3种因素为何值，b等于30.0、22.5、35.0、32.5、27.5时的非圆弯头最大冲蚀速率始终小于普通弯头。普通弯头与b = 30.0时的非圆弯头的最大冲蚀速率差值随3种因素的增大递增。研究结果可为弯头的结构设计与改进提供新的思路。

关键词 ：弯头, 气固两相流, 冲蚀磨损, 结构优化, 抗冲蚀

Abstract：

Herein, a non-circular elbow is proposed, aiming to reduce the erosion of ordinary elbow. Based on the theory of gas-solid two-phase flow, the flow field of the non-circular elbow was analyzed using Fluent software, and the non-circular elbow with better erosion resistance was optimized and the effect of flow velocity, mass concentration and particle diameter on the erosion of the elbow was studied. The results show that: the non-circular elbows are resistant to erosion when their long half axis 1(b) is located in ranges of 5.0-10.0 and 20.0-37.5, while the best erosion resistance for that with b of 30.0 with an enhancement of 17.71% in contrast to the ordinary elbow. The maximum erosion rate of non-circular elbow and ordinary elbow increases with the increase of three factors, among which the flow rate has the greatest influence. Regardless of the value of the three factors, the maximum erosion rate of non-circular elbow with b equal to 30.0, 22.5, 35.0, 32.5 and 27.5 is always smaller than that of ordinary elbow. The difference between the maximum erosion rate of the ordinary elbow and the non-circular elbow with b equal to 30.0 increases with the increase of the three factors. The results of the study can provide new ideas for the structural design and improvement of the elbow.

Key words： elbow gas-solid two-phase flow erosive wear structural optimization erosion resistance

收稿日期: 2024-10-10 32134.14.1005.4537.2024.332

ZTFLH:

TH117.1

基金资助:国家自然科学基金(52174018);国家科技重大专项(2016ZX05038-001-LH002)

通讯作者: 华剑，E-mail：huajian5410@yangtzeu.edu.cn，研究方向为机械结构强度与振动

Corresponding author: HUA Jian, E-mail: huajian5410@yangtzeu.edu.cn

作者简介: 闫冲冲，男，1998年生，硕士生

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表1 非圆弯头截面中b、c的取值

图1 对应不同b值的弯头截面形状

图2 非圆弯头结构示意图

图3 网格独立性验证

图4 数值模拟对比云图

表2 实验与数值模拟对比值

图5 压力、速度云图和流线图

图6 b值与最大冲蚀速率之间的关系

图7 不同b值下的冲蚀分布云图

图8 不同b值下的颗粒轨迹图

图9 不同b值下最大冲蚀速率与流速之间的关系

图10 不同b值下最大冲蚀速率与质量浓度之间的关系

图11 不同b值下最大冲蚀速率与颗粒直径之间的关系

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