Cavitation erosion damage in diesel engine main bearings

Author(s):  
G.N. Blount ◽  
R.D. James
2009 ◽  
Vol 125 (4) ◽  
pp. 2561-2561
Author(s):  
Qi Wang ◽  
Nicholas J. Manzi ◽  
R. Glynn Holt ◽  
Ronald A. Roy ◽  
Robin O. Cleveland

2011 ◽  
Vol 130-134 ◽  
pp. 946-949
Author(s):  
Heng Zhou Wo ◽  
Ya Fang Zhang ◽  
Xian Guo Hu ◽  
Yu Fu Xu

Nozzle is one of key parts in the diesel engine. The cavitation erosion of needle-sealing surface in the pintle nozzle has important influence on the fuel atomization, combustion and power performance of diesel engine. In order to investigate the effect of hardness of needle-sealing surface on cavitation erosion, two kinds of nozzles were selected and operated in S195 diesel engine for 10 hours. One nozzle is heat-treated one which has lower surface hardness; the other with higher surface hardness is real commercial nozzle. The surface appearances of original and operated nozzle-sealing surface were observed by SEM. It was found that the cavitation erosion on the seal surface of nozzle with lower hardness was severer than that of nozzle with higher hardness. However, their wear ways and formations are similar.


This paper describes the early stages of cavitation damage observed in cavitating venturi tunnels. The cavitating fluids were water and mercury, and a wide range of specimen materials were used. The damage was found to consist of single-event symmetical craters and irregular fatigue-type failures. The degree of damage was highly sensitive to minor flow perturbations, and this is discussed. The effect of stress level in the specimen before testing, and relations between cavitation resistance and the mechanical properties of the materials are considered.


Wear ◽  
1982 ◽  
Vol 76 (3) ◽  
pp. 329-335 ◽  
Author(s):  
Zhou Yu-Kang ◽  
He Jiu-Gen ◽  
F.G. Hammitt

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