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CSME 2025/06
Volume 46 No.3
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255-269
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Erosive Wear Behavior of Variable Mixed-Flow Turbine Impeller Blade Under the Impact of Exhaust Particles
Taiying Wu a, Junhua Guo b, Huabing Wen c, Hongdan Liu d, Jiahao Wang a and Keliang Yu a
aGraduate Student, School of Energy and Power, Jiangsu University of Science and Technology, Zhenjiang 212100, China.
bInstructor, School of Energy and Power, Jiangsu University of Science and Technology, Zhenjiang 212100, China.
cProfessor, School of Energy and Power, Jiangsu University of Science and Technology, Zhenjiang 212100, China.
dEngineer, Chongqing Jiangjin Shipbuilding Industry Co. Ltd, Chongqing 402260, China.
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Abstract:
Particles in Marine diesel exhaust can cause the impeller blades to wear, thus reducing its efficiency and service life. In order to elucidate this wear mechanism, a prediction model applicable to the wear behavior of the impeller blades is developed based on the Euler-Lagrange method and the Finnie wear model. On this basis, the effects of parameters such as opening, particle size, and surface roughness on blade wear behavior and flow field after wear are analyzed. The results show that the small and large particles mainly flow through from the side of pressure surface and the tip clearance, respectively. The wear area of the impeller blade is mainly distributed in the trailing-side and rim-side of the pressure surface. The more serious the wear behavior, the greater the surface roughness, the greater the thickness of the boundary layer, and the lower the operating efficiency of the turbine. This work provides a guidance for the further design of marine diesel engines and has significant engineering implications.
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Keywords: Impeller blade, Exhaust particles, Erosive wear behavior, Surface roughness.
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©
2025
CSME , ISSN 0257-9731
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