スラスト滑り軸受の油膜の乱流遷移に関する研究

概要

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rights: 社団法人日本機械学会rights: 本文データは学協会の許諾に基づきCiNiiから複製したものであるrelation: IsVersionOf: http://ci.nii.ac.jp/naid/110002384186/Experimental investigation of the illstability in the fluid film of thrust bearings are presented. Flow between a stational and a rotational disk of 180 mm and 80 mm diameter are used as a model of fluid film of thrust bearingS. The gaps between two disks are varied from 0.15 mm to 4.0 mm. Water is used as a working fluid. In order to visualize the flow, two types of fine particles are used. One is the powder of barium sutfate and the other is aluminum powder. Under appropriate lighting, the flows are observed and taken a photo. Photographs show that the three types of instability patterns are observed. The first one is the spiral vortex generating in high Reynold's number region and the voltex lines are nearly concentric. The second one is a series of wave like pattern generating in middle Reynold's number region. This pattern seems to be the one called viscous instability or type II instability. The third one is cross pattern. This is observed only in narrow gaps and low Reynold's number region. These three types of instability are summarized by the relationship between the Reynold's number and Ekman number respectively.
社団法人日本機械学会の論文
1999-05-25