Thermal effect at the incipient stage of cavitation erosion on a stainless steel in ultrasonic vibration cavitation / Haosheng, Chen in Transactions of the ASME . Journal of fluids engineering, Vol. 131 N° 2 (Fevrier 2009)  

Public ISBD [article]  inTransactions of the ASME . Journal of fluids engineering > Vol. 131 N° 2 (Fevrier 2009) . - 03 p. Titre : Thermal effect at the incipient stage of cavitation erosion on a stainless steel in ultrasonic vibration cavitation Type de document : texte imprimé Auteurs : Haosheng, Chen, Auteur ; Li Jiang, Auteur ; Liu Shihan, Auteur Année de publication : 2009 Article en page(s) : 03 p. Note générale : fluids engineering Langues : Anglais (eng) Mots-clés : heat  temperature  surface roughness  cavitation  bubbles  temperature effects  cavitation erosion  vibration  stainless steel  water  high Résumé : An ultrasonic vibration cavitation erosion experiment was performed to study the thermal effect during the erosion process. The ring affected zone was observed on the sample surface around the erosion pit at the incipient stage of the cavitation erosion. The results of the surface testing on roughness, hardness, and chemical composition proved that the zone was caused by thermal effect, and that the zone surface experienced a tempering process with the temperature higher than 300°C. Numerical simulation results show that the high temperature domain in the bubble directly contacting the solid wall is a necessary condition for the occurrence of the tempering process on the zone surface, or the heat in the bubble can hardly be transferred to the solid wall under the effects of the great temperature gradient in the bubble and the quick cooling process in the water. En ligne : http://fluidsengineering.asmedigitalcollection.asme.org/issue.aspx?journalid=122 [...] [article] Thermal effect at the incipient stage of cavitation erosion on a stainless steel in ultrasonic vibration cavitation [texte imprimé] / Haosheng, Chen, Auteur ; Li Jiang, Auteur ; Liu Shihan, Auteur . - 2009 . - 03 p. fluids engineering Langues : Anglais (eng) in Transactions of the ASME . Journal of fluids engineering > Vol. 131 N° 2 (Fevrier 2009) . - 03 p. Mots-clés : heat  temperature  surface roughness  cavitation  bubbles  temperature effects  cavitation erosion  vibration  stainless steel  water  high Résumé : An ultrasonic vibration cavitation erosion experiment was performed to study the thermal effect during the erosion process. The ring affected zone was observed on the sample surface around the erosion pit at the incipient stage of the cavitation erosion. The results of the surface testing on roughness, hardness, and chemical composition proved that the zone was caused by thermal effect, and that the zone surface experienced a tempering process with the temperature higher than 300°C. Numerical simulation results show that the high temperature domain in the bubble directly contacting the solid wall is a necessary condition for the occurrence of the tempering process on the zone surface, or the heat in the bubble can hardly be transferred to the solid wall under the effects of the great temperature gradient in the bubble and the quick cooling process in the water. En ligne : http://fluidsengineering.asmedigitalcollection.asme.org/issue.aspx?journalid=122 [...]

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