TY - JOUR
T1 - Initiation and growth of gaseous cavity in concentrated contact in various surrounding gases
AU - Otsu, Takefumi
AU - Tanaka, Hiroyoshi
AU - Sugimura, Joichi
N1 - Funding Information:
The authors are grateful to Idemitsu Kosan Co., Ltd., for supplying the lubricants, and to Professor Naoshi Izumi of Kurume National College of Technology for the useful comments. Mr. Otsu wishes to thank the research fellowship for the young scientist from the Japan Society for the Promotion of Science.
Copyright:
Copyright 2012 Elsevier B.V., All rights reserved.
PY - 2012/9
Y1 - 2012/9
N2 - This paper describes an experimental study on the initiation and growth of gaseous cavity in EHL. Lubricated point contact sliding tests and separating tests were conducted in various different gas environments. Gases used were air, helium, argon and carbon dioxide. In the sliding tests, length of a cavity rapidly increased with time in the initial stage after its generation, and the speed of the increase was the same in all of the gases. The cavity length gradually increased after that at different speeds depending on the solubility of gas in the lubricant as reported in the previous study. In the separating test, changes in the size and the shape of the cavities were the same for all of the gases. This implied that the growth of cavity in the initial stage did not depend on dissolved gas in the lubricant. It is shown by a simple numerical analysis that the initial growth of the cavity depends on the rapid evolution of negative pressure at the outlet of the conjunction.
AB - This paper describes an experimental study on the initiation and growth of gaseous cavity in EHL. Lubricated point contact sliding tests and separating tests were conducted in various different gas environments. Gases used were air, helium, argon and carbon dioxide. In the sliding tests, length of a cavity rapidly increased with time in the initial stage after its generation, and the speed of the increase was the same in all of the gases. The cavity length gradually increased after that at different speeds depending on the solubility of gas in the lubricant as reported in the previous study. In the separating test, changes in the size and the shape of the cavities were the same for all of the gases. This implied that the growth of cavity in the initial stage did not depend on dissolved gas in the lubricant. It is shown by a simple numerical analysis that the initial growth of the cavity depends on the rapid evolution of negative pressure at the outlet of the conjunction.
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U2 - 10.1016/j.triboint.2012.04.013
DO - 10.1016/j.triboint.2012.04.013
M3 - Article
AN - SCOPUS:84860804700
SN - 0301-679X
VL - 53
SP - 68
EP - 75
JO - Tribology International
JF - Tribology International
ER -