Numerical Simulation of Erosion Wear on Non-circular Elbows

doi:10.11902/1005.4537.2024.332

Journal of Chinese Society for Corrosion and protection

2025, Vol. 45

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

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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

Cite this article:

YAN Chongchong, XIE Guangming, HUA Jian, ZENG Yun, ZHOU Sizhu, YU Zekun. Numerical Simulation of Erosion Wear on Non-circular Elbows. Journal of Chinese Society for Corrosion and protection, 2025, 45(5): 1425-1432.

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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

Received: 10 October 2024 32134.14.1005.4537.2024.332

ZTFLH:

TH117.1

Fund: National Natural Science Foundation of China(52174018);National Science and Technology Major Project(2016ZX05038-001-LH002)

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

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	YAN Chongchong
	XIE Guangming
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	ZENG Yun
	ZHOU Sizhu
	YU Zekun

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https://www.jcscp.org/EN/10.11902/1005.4537.2024.332 OR https://www.jcscp.org/EN/Y2025/V45/I5/1425

Table 1 Values of b and c in non-circular elbows cross-section

Fig.1 Cross-sectional shapes of non-circular elbows corresponding to the different values of b

Fig.2 Schematic structure of non-circular elbow

Fig.3 Grid independence verification

Fig.4 Numerical simulation comparison cloud map: (a) simulated values in this paper, (b) literature simulation values

Table 2 Comparison of experimental values and numerical simulation values

Fig.5 Pressure (a), velocity (b) cloud maps and flow diagram (c)

Fig.6 Maximum erosion rate as a function of b

Fig.7 Cloud maps of erosion distribution at different b values

Fig.8 Particle trajectories at different b values

Fig.9 Relationships between maximum erosion rate and flow velocity under different b values

Fig.10 Relationships between maximum erosion rate and mass concentration under different b values

Fig.11 Relationships between maximum erosion rate and particle diameter under different b values

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