Abstract
As part of a continuing study of the effects of film reformation in plain journal bearing, an experimental programme with grooved, rectangular pad, slider thrust bearings has been undertaken. For such a pad with lubricant supplied under pressure to a central groove an oil-air interface may form between theh pad and the opposing runner. Under specific operatings conditions instability of this interface was observed and the study reported was undertaken to elucidate the mechanism of this characterizing the instability is identified, and the ingress of air into the lubricant film immediately proir to interface collapse is shown to occur. It is postulated that this is the basis of the mechanism of instabiltity.
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